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+.help IRAF  Aug97  "V2.11EXPORT Release Notes"
+.sp 1
+.ce
+IRAF V2.11EXPORT Release Notes
+.ce
+August 27, 1997
+
+
+Modifications and additions to IRAF V2.11EXPORT, compiled since the last
+documented release of IRAF, V2.10.3, are summarized below.  V2.11EXPORT is
+a major release of IRAF and will be available for all supported platforms.
+These release notes provide a summary of the major changes in V2.11.  More
+detailed technical documentation of all system changes will be found in the
+notes.v210 and notes.v211 files in the iraf$doc and iraf$local directories.
+
+.nf
+    1. \fBThings to be aware of or watch out for\fR
+	1.1. Parameter file changes 
+	1.2. Networking change
+	1.3. Image format change 
+	1.4. FITS kernel
+	1.5. RFITS/\fIwfits\fR changes 
+	1.6. Merged SunOS and Solaris IRAF systems 
+	1.7. Tape access 
+	1.8. Default magnitude zero changed
+
+    2. \fBIMAGES package changes\fR
+
+    3. \fBMajor system changes\fR
+	3.1. New FITS image kernel (FXF)
+	3.2. Changes to the IRAF native image format (OIF)
+	3.3. IMFORT changes
+	3.4. Environment variables
+	3.5. New intrinsic functions
+	3.6. System default modifications
+	3.7. Libraries added
+	3.8. Graphics changes
+	3.9. FITS-related core-level task changes
+	3.10. General changes
+
+    4. \fBNew tasks, or old tasks moved to new packages\fR
+
+    5. \fBTask and package deletions\fR
+
+    6. \fBModifications to old tasks\fR
+
+    7. \fBParameter file changes\fR
+.fi
+.nh
+Things to be aware of or watch out for
+.nh 2
+Parameter file changes 
+
+Since this is a major release we recommend that you do a \fImkiraf\fR and
+delete all your old parameter files. You may choose not to do this if you
+are in the midst of a project and have setups that may be difficult to
+reproduce.  Old IMAGES package parameter files will no longer be recognized,
+however, because of the package reorganization mentioned below.  Generally,
+old parameter files are merged automatically with any new parameter files
+if there have been any changes, but if you do have problems you will need
+to \fIunlearn\fR the task before you can proceed. A list of the parameter
+file changes appears below and you may wish to check this list to see how
+this will affect your setups.
+
+The automatic parameter file update/merge mechanism, which is used if you
+do not initialize your parameters with \fImkiraf\fR, is based on file date
+comparisons.  If you run IRAF V2.10 after V2.11 has been installed, the
+file dates on your uparm parameter files will be more recent than the
+V2.11 installation date.  If you then try to run V2.11, the automatic
+parameter file merge/update will fail due to the file dates.  The system
+only updates personal parameter files which are older than the update date
+of the system.  A \fImkiraf\fR avoids the problem if you delete your
+parameter files, causing them to be updated from the system default
+versions.
+.nh 2
+Networking change
+
+The "set node = foo" syntax, used to enable remote image display under
+IRAF networking, has changed.  The new syntax requires that an exclamation
+be appended to the node name as in the example below (this dates back to
+V2.10.4 so many users will already be familiar with the feature).
+.nf
+
+        cl> set node = "orion!"
+.fi
+.nh 2
+Image format change 
+
+The internal IRAF image format (.imh images) has changed.  V2.11EXPORT
+can read the old image format but the new image format is not readable by
+V2.10.4 or earlier versions.  This means that you can not easily go from
+the new IRAF system (V2.11) to an old one (V2.10.4 or earlier) unless you
+first convert the V2.11 IRAF images to FITS files.  All your old V2.10.4
+or earlier images are readable by V2.11EXPORT.  The benefit is that the
+new image format is machine independent, slightly more storage efficient,
+and supports long file pathnames.  If it is necessary to be able to read
+images written by V2.11 with older software, V2.11 can be made to write
+the old IRAF image format by setting the \fIoifversion\fR environment
+variable, e.g., "set oifversion = 1" (the default is version 2).  See
+below for details.
+.nh 2
+FITS kernel
+
+A FITS image kernel is available in V2.11, allowing runtime read and write
+access to FITS files on disk.  There are many related changes to IRAF
+image i/o and FITS support.  More information on the new image kernel,
+and on the expanded FITS support available in V2.11, is given below.
+.nh 2
+RFITS/WFITS changes 
+
+\fIrfits\fR and \fIwfits\fR have been modified to support multi-extension
+FITS files.  The extension numbering convention used is the same as in
+the FITS image kernel.  As a result, users who read simple FITS files on
+disk with a command such as  "rfits diskfilename 1 foo" will find that
+this no longer works - instead use "rfits diskfilename 0 foo".  See below
+for details.
+.nh 2
+Merged SunOS and Solaris IRAF systems 
+
+A single installation of Sun/IRAF will now simultaneously support both
+SunOS and Solaris (previously separate IRAF distributions were required
+for each).
+.nh 2
+Tape access 
+
+The "tapecap" mechanism has changed.  The system now looks for the filename
+"tapecap.<node>" followed by the default "tapecap".  <node>: should be
+the hostname (as used by IRAF networking) of the server hosting the tape
+drives described by the tapecap file.  For example if host "gemini" serves
+up some tape drives it's tapecap file is named "tapecap.gemini".  If a
+server-specific tapecap file is not found the default "tapecap" (on the
+possibly remote server node) is used.  This feature allows a single IRAF
+installation to be shared by multiple servers.
+.nh 2
+Default magnitude zero changed
+
+The default APPHOT magnitude zero point has been changed from 26.0 to 25.0
+to bring it into agreement with the DAOPHOT package default value and
+thereby avoid confusion for users who switch back and forth between
+packages.  The affected APPHOT tasks are \fIphot\fR, \fIphotpars\fR,
+\fIpolypars\fR, \fIpolyphot\fR, \fIqphot\fR, \fIradprof\fR, and \fIwphot\fR.
+The APPHOTX package in the addon DIGIPHOTX package will retain the old
+zero point values until IRAF 2.11 is released after which they will be
+updated.
+
+The default value of the magzero parameter in \fIimexamine\fR was changed
+from 30.0 to 25.0 for consistency with the DIGIPHOT package.
+.nh
+IMAGES package changes
+
+The IMAGES package has been reorganized by function into the 7 subpackages
+listed below.
+.nf
+
+      imcoords - Image coordinates package
+      imfilter - Image filtering package
+         imfit - Image fitting package
+        imgeom - Image geometric transformation package
+       immatch - Image matching and combining package
+        imutil - Image utilities package
+            tv - Image display utilities package
+
+.fi
+The new IMAGES package contains a total of 82 tasks, including 26 new tasks
+from the IMMATCH and VOL external addon packages, 6 existing PROTO package
+tasks, and 1 existing NOAO.PROTO package task. The undocumented IMAGES
+package IMDEBUG and its 6 tasks have been deleted from the IMAGES package.
+User should use the tasks in the ARTDATA package instead.
+
+This reorganization of the IMAGES package should be mostly transparent to
+the user and not affect any existing scripts, unless you were using any of
+the 6 deleted tasks. By default, the IMAGES subpackages are automatically
+loaded when you log in to the CL. Old parameter files will not be recognized
+since the package names have changed.
+.nh
+Major system changes
+.nh 2
+New FITS image kernel (FXF)
+
+V2.11 introduces a new image kernel providing runtime access to FITS
+multi-extension image datafiles.  What this means is that IRAF tasks
+can now read and write FITS images directly at runtime.  The native IRAF
+image format (used by images with the .imh extension), remains the
+default as it is the most efficient and well-tested format.  IMH, FITS,
+and the other types of images supported by IRAF can be used
+interchangeably in most IRAF tasks.  Although we have extensively tested
+the new FITS image kernel, it is still evolving, is complex, and still
+has some bugs.  Users should use it with caution.  Please let us know of
+any problems.
+
+Besides support for classical FITS images, the new FITS kernel also
+supports multi-extension FITS files: several FITS files packed into one
+large file with a PHU (Primary Header Unit) that contains global header
+information shared by the other files.  Multi-extension FITS files are
+0-indexed, with the PHU being 0 and the first image extension (or other
+data extension) at index 1.  If there is no PHU then the first FITS
+image is 0 and there is no global header.
+
+For further details about the FITS kernel please see the new FITS Kernel
+User's Guide by Nelson Zarate.
+.nh 2
+Changes to the IRAF native image format (OIF)
+
+.nf
+   o It was necessary to change the IRAF image format to increase the
+     maximum path length for header and pixel files.  This made it necessary
+     to change the disk image format, since the old format only allowed 80
+     characters for the pixel file pathname.  The path lengths can now be up
+     to 255 characters.
+
+     Support for two versions of the image and pixel file headers was added.
+     V2.11 will read both the old image format (V1) and the new image format
+     (V2). But the new image format is not readable by older versions of IRAF.
+
+   o Native format IRAF images (OIF type or extension ".imh") are now machine
+     independent, for example, a PC and a Sun can now access the same images.
+
+   o Support was added for byte swapping pixels. With the machine independent
+     image header, this allows .imh images to be read on any node (integer)
+     or any IEEE-compatible node (floating).
+
+   o Some pointers: "strings foo.imh" (or other tools like the "less" file
+     viewer) can be used at the Unix level to look at the text contained in
+     the new V2 OIF image headers.
+.fi
+.nh 2
+IMFORT changes
+
+.nf
+   o IMFORT was brought up to date to read and write the new V2 ".imh" images.
+     The old V1 format is still supported but new images are written using
+     the new machine independent V2 format by default.
+
+   o Image headers can now be any size (the old IMFORT had a fixed, relatively
+     low, limit on the image header size).
+
+   o The "min_lenuserarea" variable is now supported by IMFORT (since IMFORT
+     is host level the variable must be defined in the host environment).
+     The builtin default header buffer is 64000 chars, which is about 800
+     card images.
+.fi
+.nh 2
+Environment variables
+
+Several new environment variable have been added to the system.
+
+.nf
+   o The new environment variable \fIimextn\fR determines the image kernels
+     (image file formats) recognized by IRAF and defines the mapping of
+     imagefile extensions to these image formats.  A file that does not have
+     an extension listed in imextn may not be recognized as an image by all
+     IRAF tasks.  The default value of imextn is as follows:
+
+	  imextn = "oif:imh fxf:fits,fit plf:pl qpf:qp stf:hhh,??h"
+
+     IRAF tasks will not recognize a file as an image unless it has an
+     extension (except \fIrfits\fR which will read FITS files on disk that
+     have no extensions).  The \fIrename\fR task can be used to add
+     extensions to image files if needed. "imextn" can be redefined (use
+     reset imextn = "new-value") to modify the mapping of extensions to
+     image types.
+
+     The meaning of the fields of the default "imextn" are as follows.  Each
+     substring corresponds to a single kernel. The "xxx:" is the internal
+     name of the image kernel, i.e. "oif", "fxf", "plf", etc.  A comma
+     delimited list of the extensions, or extension patterns, associated with
+     that image format follows the colon.  For example, for the FITS image
+     kernel, the internal kernel name is "fxf" and the system default file
+     extensions are ".fits" and ".fit".
+
+        - oif:imh - The original (native) IRAF image format.
+
+        - fxf:fits,fit - The FITS image extension format, which supports
+          classical FITS images as well as multi-extension FITS files.
+
+        - plf:pl - The pixel list format used for compressed pixel masks.
+
+        - qpf:qp - The QPOE image format for event list data (typically
+          X-ray or other high energy data).
+
+        - stf:hhh,??h - The Space Telescope runtime GEIS image format.
+
+     Users can define extensions for the fxf and stf kernels. For example,
+     if you have FITS files on disk that have a .ft extension then you can
+     reset imextn so that IRAF will recognize these image extensions:
+
+          cl> reset imextn="fxf:ft"
+
+     The new .ft extension for the FITS kernel images will now override the
+     default values - the other kernels remain unchanged. ".fits" will no
+     longer be recognized as a FITS file unless you include it in the list
+     of extensions for the "fxf" kernel.
+
+     The first extension given for a kernel defines the default file
+     extension for new images of that type (rather than e.g. the value of
+     imtype, or a builtin default).
+
+     The value of "imextn" is only read once when a process starts up. Hence
+     it is advisable to do a "flpr" (flush process cache) after changing
+     this variable, to force all processes to re-read it.
+
+   o The environment variable \fIimtype\fR defines the default image type for
+     new images created by IRAF.  If a file extension is given explicitly
+     when creating a new image then this file extension, in combination with
+     the "imextn" mappings, determines the type of the new image.  Otherwise
+     the type is determined by the value of "imtype".  Typical values are
+     "imh" for native IRAF images, or "fits" for FITS images.  The internal
+     kernel name documented above for "imextn" can be used instead of a file
+     extension to ensure that the desired image format is used regardless of
+     what extensions are assigned to that type by imextn.
+
+     The default value of imtype is "oif,noinherit" which means that the
+     IRAF native format is the default for all new images, regardless of the
+     type of the input image (i.e. do not "inherit" the input image type).
+     "inherit" was the default in V2.10 and earlier versions of IRAF.
+
+     For example, if you wish to use FITS as the default for new images you
+     can set imtype=fits as follows:
+
+            cl> reset imtype="fits"
+            cl> flpr                  % needed before the next task execution
+
+     Assuming "imextn" defines ".fits" as a valid file extension for FITS
+     imagefiles (kernel "fxf"), all new images produced by IRAF will be FITS
+     files with the extension .fits unless some other extension is given
+     explicitly when creating a new image.
+
+            cl> reset imtype = "imh,inherit"
+
+     This example sets the default type for new images to ".imh" for native
+     format images, but enables image type inheritance.  By default new
+     images will be of the same type as the input image.  For example if a
+     FITS image is being read another FITS image will be output, or if a
+     pixel mask is being read a pixel mask will be created.
+
+     You can override the default output image type specified by imtype by
+     giving an image extension (as defined by imextn) explicitly in the image
+     name, e.g. "pix.imh", "pix.fits", "pix.pl" and so on.
+
+   o A new environment variable called \fIimclobber\fR has been added.
+     The default value is set to no. If imclobber is set to yes, images
+     can and will be overwritten, without warning, when you create new
+     images.
+
+   o The original IRAF image format (OIF) kernel now supports an environment
+     variable \fIoifversion\fR which, if defined, specifies the file
+     version for new OIF images (for example, oifversion=2 produces the
+     new format, or version 2 images).  By default the variable is undefined,
+     the builtin OIF default will be in effect, and new-format images will
+     be generated.  This variable is provided only for backwards
+     compatibility, e.g., when using V2.11 IRAF with old software which
+     cannot easily be updated.
+.fi
+.nh 2
+New intrinsic functions
+
+Two new intrinsic functions were added to the CL, \fIimaccess\fR and
+\fIdefvar\fR.  \fIimaccess\fR tests whether an image exists, e.g.,
+(imaccess("dev$pix")) or (imaccess(foo.fits[3])).  \fIdefvar\fR tests
+whether an environment variable exists, e.g. (defvar("imextn")).
+.nh 2
+System default modifications
+.nf
+
+   o The default size of the user area (\fImin_lenuserarea\fR) was increased
+     to 64000 (about 800 80 character cards).  There was some ambiguity about
+     units for min_lenuserarea; it should be consistently characters now.
+
+   o The maximum number of open IRAF logical files was increased from 128 to
+     256. This is good news for \fIimcombine\fR users.
+
+   o Various buffer limits were increased:
+
+        - The IRAF line length was increased from 161 to 1023 characters.
+          One often ran into this lower limit when entering a long list of
+          input image names, for example.
+
+        - CL commands can now be 2047 characters long (the old limit was
+          1024) - this is particularly useful for scripts.
+
+        - IRAF file names can now be up to 255 characters long.
+
+        - Expanded file names (pathnames) can be up to 511 characters long.
+.fi
+.nh 2
+Libraries added
+
+The Starlink positional astronomy library SLALIB was added to the math
+package.
+.nh 2
+Graphics changes
+.nf
+
+   o SGI Translator change: Modified the header ID string produced by
+     sgi2uapl to be "%!PS", this is required by certain models of printers.
+
+   o Installed graphcap support for the STSDAS PostScript graphics kernel.
+
+   o The SGI graphics kernel was upgraded with a better roman font, and a
+     new greek font was added. To use the new high-quality greek fonts use
+     the "\fG" escape sequence when you use the "T" keystroke to mark text
+     in a plot, e.g., \fGa \fRHydra would produce " Hydra". The greek font
+     may also be used in label parameters for tasks like GRAPH, for example
+
+             cl> graph dev$pix xlabel="Wavelength\\fG(A)"
+
+     would produce an Angstrom symbol in parenthesis.  The double backslash
+     is necessary to pass the escape string thru the CL.  A file containing
+     the mappings for the greek fonts and other special characters can be
+     found at http://iraf.noao.edu/greek.ps.
+.fi
+.nh 2
+FITS-related core-level task changes
+.nh 3
+IMHEADER
+
+The behavior of \fIimheader\fR has changed a bit - typed with no arguments
+it will list all the images in the current directory, as in the following
+example:
+
+.nf
+            cl> imhead
+            pix4.imh[512,512][short]: m51  B  600s
+            boc.fits: FXF: must specify which FITS extension (boc.fits)
+            fits.fits[512,512][short]: m51  B  600s
+            pix.fits[512,512][short]: m51  B  600s
+            pix3.fits[512,512][short]: m51  B  600s
+            pix5.fits: FXF: must specify which FITS extension (pix5.fits)
+            zero.fits: FXF: must specify which FITS extension (zero.fits)
+            mask.pl[512,512][int]: m51  B  600s
+            foo.qp[1024,811][int]:
+.fi
+
+The multi-extensions FITS files show up in the list with the message
+"FXF: must specify which FITS extension", since these files contain
+multiple images and the task does not know which image to open to get
+header information.
+
+At present imheader does not use "imextn" to determine what is and is
+not an image. The parameter "imlist" defines the valid imagefile
+extensions. If imextn is modified "imlist" may need to be modified as
+well.
+.nh 3
+RENAME
+
+The \fIrename\fR task was modified to allow a destination directory to be
+specified without changing the filename.  A new "field" parameter option
+"all" was added and made the default so the entire filename is changed
+(or moved in the case of a destination directory).  When field is set
+to "extn" filenames without an extension will not have the new extension
+appended so a filename isn't generated which can get overwritten.
+.nh 3
+\fIrfits\fR/\fIwfits\fR
+
+Some changes were also implemented in \fIrfits\fR and \fIwfits\fR to add support
+for multi-extension FITS files.
+
+.nf
+   o The default action of \fIwfits\fR when writing to tape is unchanged for
+     single image files.
+
+     \fIwfits\fR now has a new parameter called "fextn" and it is set to
+     "fits".  This parameter only affects FITS files written by \fIwfits\fR
+     to disk - the extension .fits will automatically be added to the
+     filenames, so that the files will be automatically recognized by
+     the FITS image kernel.
+
+     \fIwfits\fR also has two additional parameters called "extensions" and
+     "global_hdr" that deal with writing multi-extension FITS files.
+
+   o The default action of \fIrfits\fR from tape to disk remains unchanged.
+
+     If \fIrfits\fR is used to read FITS files on disk then users need to
+     be aware of a change to the behavior of the "file-list" parameter.
+     File-list is now used to define the list of files on the tape as
+     well as the list of extensions in a multi-extension FITS image.
+     To read single FITS images on disk use "" as the value for
+     "file-list". Some users have been using "1" for this value but now
+     that value will try to read the first extension which doesn't
+     exist - use "0" if you wish to put something there.
+
+     \fIrfits\fR will unpack multi-extension FITS files upon a read. If you
+     wish to retain the multi-extension FITS format then use T2D and
+     RENAME.
+.fi
+
+The help pages have been updated to reflect these changes.
+
+\fIwfits\fR now writes ushort (16 bit unsigned short) images to FITS images
+with bitpix=16, bscale=1.0, and bzero=32768.0 by default.  \fIrfits\fR will
+read these images back as type ushort.
+.nh 2
+General changes
+
+.nf
+   o The GSURFIT package has been updated to include support for the "half"
+     cross terms option useful in computing plate solutions.  Tasks that can
+     make use of this feature have been updated although their default
+     behaviors have not changed.
+
+   o The code which computes the CD matrix from CDELT/CROTA was modified.
+     The old code computed the diagonal (scale) terms correctly but the
+     rotation terms were evidently incorrect.  The old code was based on
+     the 1988 Hanisch and Wells WCS paper and the new code is based on a
+     more recent paper by Mark Calabretta et al, which supersedes the
+     1988 representation.  The affect of this change should be limited
+     as it only affects rotated images for which CDELT is given but no
+     CD matrix is defined. (V2.10.4p2)
+
+   o Several new celestial coordinate projection functions have been added.
+     Users with IPAC data that use the CAR projection function should now be
+     able to read the image coordinates directly with LISTPIXELS, etc.
+.fi
+.nh
+New tasks, or old tasks moved to new packages
+
+.nf
+ \fBTask Name      Package                  Function\fR
+
+ CCXYMATCH      IMCOORDS         Four new tasks for computing and evaluating
+ CCMAP                           simple astrometric plate solutions and storing
+ CCSETWC                         them in the image headers in fits-compatible
+ CCTRAN                          format.
+
+ CCFIND         IMCOORDS         CCFIND locate objects in an image given a
+                                 celestial coordinate list and the image wcs.
+
+ IMCCTRAN       IMCOORDS         Two new tasks for transforming celestial
+ SKYCTRAN                        coordinate lists and image celestial
+                                 coordinate systems from one celestial
+                                 coordinate system to another.
+
+ STARFIND       IMCOORDS         STARFIND automatically detects stellar objects
+                                 in a list of images.
+
+ WCSCTRAN       IMCOORDS         A new task for transforming between IRAF image
+                                 coordinate systems.
+
+ WCSEDIT        IMCOORDS         Two unaltered former PROTO package tasks for
+ WCSRESET                        editing IRAF image coordinate systems.
+
+ FRMEDIAN       IMFILTER         Four new tasks for doing circular/elliptical/
+ FRMODE                          ring image median filtering.
+ RMEDIAN
+ RMODE
+
+ IM3DTRAN       IMGEOM           The former addon VOL package task IM3DTRAN for
+                                 doing 3D image transposes.
+
+ GEOXYTRAN      IMMATCH          A new task for transforming coordinate lists
+                                 using the results of the GEOMAP task.
+
+ IMCENTROID     IMMATCH          Four new tasks for computing matched pixel
+ SKYXYMATCH                      lists. IMCENTROID is a modified version of the
+ WCSXYMATCH                      PROTO package task of the same name.
+ XYXYMATCH
+
+ SKYMAP         IMMATCH          Two new tasks for computing geometric
+ WCSMAP                          transforms using the image coordinate system
+                                 information.
+
+ IMALIGN        IMMATCH          Three new tasks for doing automated image
+ SREGISTER                       registration. IMALIGN is a modified version
+ WREGISTER                       of the PROTO package task of the same name.
+
+ WCSCOPY        IMMATCH          A new task for copying the coordinate system
+                                 of a reference image to a set of input images.
+
+ PSFMATCH       IMMATCH          A new task for matching the PSFs of a set of
+                                 input images to the PSF of a reference image
+                                 using Fourier techniques.
+
+ LINMATCH       IMMATCH          A new task for matching the linear intensity a
+                                 scale of a set of input images to the
+                                 intensity scale of a reference image.
+
+ IMFUNCTION     IMUTIL           The former PROTO package task for applying a
+                                 single argument function to an image.
+
+ IMJOIN         IMUTIL           The former addon VOL package task for joining
+                                 same-dimensioned images along a specified
+                                 dimension.
+
+ IMREPLACE      IMUTIL           The former PROTO package task IMREPLACE for
+                                 replacing bad pixels based on their value.
+
+ IMTILE         IMUTIL           A modified version of the NOAO.PROTO IRMOSAIC
+                                 task for tiling same sized 2D images into a
+                                 single mosaiced image.
+
+ EXPORT         DATAIO           Two new tasks from the external IMCNV package
+ IMPORT                          for exporting IRAF images to binary formats
+                                 and for importing binary files into IRAF
+                                 images.
+
+ TEXT2MASK      PROTO            This new task appears in conjunction with a
+                                 new  pixel mask based version of FIXPIX.
+
+ IMEXTENSIONS   PROTO            This task selects and lists image extensions 
+                                 in  files.   Image extensions currently occur 
+                                 in  multi-extension FITS files and multi-group 
+                                 Geiss (STF format) files.
+   
+ CCDMASK        CCDRED           This new task creates a pixel mask from a
+                                 CCD image.
+
+ AIDPAR         ONEDSPEC         New parameter set for automatic line
+                                 identification for the tasks AUTOIDENTIFY,
+                                 IDENTIFY and REIDENTIFY.
+
+ AUTOIDENTIFY   ONEDSPEC         A new task to automatically identify lines
+                                 and fit the dispersion function.
+
+ SKYTWEAK       ONEDSPEC         Sky spectra are shifted and scaled to best
+                                 subtract sky features from data spectra.
+
+ TELLURIC       ONEDSPEC         Telluric calibration spectra are shifted and
+                                 scaled to best divide out telluric features
+                                 from data spectra.
+
+ ASTCALC        ASTUTIL          An astronomical calculator.
+
+ ASTRADIUS      ASTUTIL          Finds images within a circle on the sky.
+.fi
+.nh
+Task and package deletions
+
+CUBE, DUMP, GSUBRAS, MAXMIN, MKIMAGE, MKTEST: These tasks have been
+superseded by the equivalent tasks in the IMAGES or ARTDATA packages.
+The functionality of these tasks still exists in the 
+iraf$pkg/images/lib/zzdebug.x file.
+
+REGISTER: This task has been renamed to GREGISTER.
+
+IMALIGN, IMCENTROID, IMFUNCTION, IMREPLACE, WCSEDIT, WCSRESET: Moved to the
+IMAGES package.
+.nh
+Modifications to old tasks
+
+Grouped by package, a list of modifications to old tasks in IRAF are
+summarized below.  We have included modifications since the V2.10.3 
+release.
+.nf
+
+\fBIMFILTER:\fR
+    FMEDIAN, FMODE, MEDIAN, MODE
+        Minimum and maximum good data value parameters zloreject and zhireject
+        and a verbose option parameter were added.
+    MEDIAN, MODE
+        The 64 x 64 maximum kernel size limit was removed from these tasks.
+
+\fBIMMATCH:\fR
+    GEOMAP
+        Renamed the output parameter to database for the sake of consistency
+        with other new images tasks.
+
+        Changed the default value of the reject parameter from 0.0 to INDEF.
+
+        Added the transforms parameter. Transforms permits the user to specify
+        the names of the output database records explicitly.
+
+        Added the parameter results. Results permits the user to save a summary
+        of the results including a description of the transform geometry, and a
+        listing of the input coordinates, the fitted coordinates, and the fit
+        residuals.
+
+        Added the fitgeometry parameter. Fitgeometry permits the user to
+        constrain the linear part of the fit to: 1) x and y shifts only, 2) x
+        and y shifts and rotation only, 3) x and y shifts and x and y scale
+        changes only, 4) x and y shifts, rotation, and a scale change only, 5)
+        x and y shifts, rotation, x and y scale changes only, and 5) x and
+        shifts, rotation, skew, and x and y scale changes.
+    GREGISTER
+        Renamed the register task gregister to emphasize that it is paired with
+        the geomap task and to avoid confusion with the new registration tasks.
+    GEOTRAN, GREGISTER
+        Renamed the transform parameter to transforms.
+
+        Added the verbose parameter.
+    GEOTRAN
+        Added the ability to write to a section of an existing image.
+    IMCOMBINE
+        The  limit of the number of images that may be combined has been
+        removed.  If the number of images exceeds the maximum number  of
+        open  images  permitted  then the images are stacked in a single
+        temporary image and  then  combined  with  the  project  option.
+        Note   that   this   will   double   the   amount  of  diskspace
+        temporarily.  There is also a limitation in this case  that  the
+        bad  pixel mask from the first image in the list will be applied
+        to all the images.
+
+        Integer  offsets  may  be  determined  from  the   image   world
+        coordinate system.
+
+        A  combination  of  ushort  and  short  images  now  defaults to
+        integer.
+
+        Added support for type ushort images.
+
+        Added a new options for computing offsets using the image wcs.
+
+        Removed the limit on the maximum number of images that can be combined.
+    IMALIGN, IMCENTROID
+        Renamed the images parameter to input, changed the reference parameter
+        mode from hidden to automatic, and reversed the order of the reference
+        and coords parameters.
+
+\fBIMUTILS:\fR
+    IMEXPR
+        Modified the task so that it will accept an image name that looks like
+        a number in the first few characters, but which is really an image
+        name.  For example, "123.imh" or "../foo.imh".  The previous version
+        of imexpr was treating any string which looked like a number in the
+        first few characters as a numeric constant. (V2.10.4p2)
+    IMREPLACE
+        The lower value is now rounded up for integer images so  that  a
+        range like 5.1-9.9 affects pixels 6-9 instead of 5-9.
+    IMSUM
+        Now allows "ushort" data types.
+
+\fBTV:\fR
+    DISPLAY
+        The bad pixel mask,  overlay  mask,  sample  mask,  and  overlay
+        colors  parameters  and  functionality  have  been  added.   The
+        "nsample_lines" parameter is now an "nsample" parameter.
+
+        Bugs in the coordinate system sent  to  the  image  display  for
+        cursor readback were fixed.
+    IMEDIT
+        If  xorder  or  yorder  are  zero  then  a  median background is
+        computed for the 'a' and 'b' keys.
+    IMEXAMINE
+        ('a'  and  'r'):  The  fit  to  the  radial  profile  points now
+        includes both a Gaussian  and  a  Moffat  profile.   The  Moffat
+        profile  exponent  parameter, beta, may be fixed or left free to
+        be fit.
+
+        ('a' and 'r'): New estimates fo the FWHM were added to  the  'a'
+        and  'r'  keys.   These  include  the  Moffat  profile fit noted
+        above, a direct  measurement  of  the  FWHM  from  the  radially
+        binned  profile,  and  a  Gaussian  or  Moffat fit to the radial
+        enclosed flux profile.  The output from these keys was  modified
+        to include the new information.
+
+        ('a'  and  'r'):  The  direct  FWHM  may  be used to iteratively
+        adjust the fitting  radius  to  lessen  the  dependence  on  the
+        initial fitting radius value.
+
+        ('k'): Added a kimexam parameter set.
+
+        The default value of rimexam.magzero parameter was changed from
+        30.0 to 25.0 for consistency with the digiphot package.
+
+\fBPROTO:\fR
+    FIELDS
+        The default value for the lines parameter was changed to an open
+        upper limit.
+
+        Changed the default value of the lines parameter from "1-999" to
+        "1-" so that the upper bound would be open ended.
+    FIXPIX
+        This  task  replaces  the  old  task  (now obsolete.ofixpix) and
+        works with the more general  pixel  mask  facilities.   It  also
+        provides   greater  flexibility  in  choosing  the  interpolation
+        direction.
+
+\fBICFIT\fR used in various tasks:
+    ICFIT
+        The  :xyshow output was modified to 1) not include colon labels,
+        2) print (X, Y, Y fit, Weight) instead of (X, Y fit, Y), and  3)
+        the printed values are those actually used in the fit when using
+        composite points (naverage not 1).
+
+\fBARTDATA:\fR
+    MK1DSPEC
+        Lorentzian and Voigt profiles were added and the parameters  and
+        input  line  list  format were changed.  The widths are now FWHM
+        instead of gaussian sigmas.
+    MKOBJECTS, MKNOISE
+        The default value of "ranbuf" was changed to zero.
+    GALLIST
+        The  default value for the minimum elliptical galaxy axial ratio
+        was changed to 0.3 to cover the range E0-E7 uniformly.
+    MKPATTERN
+        Now allows ndim=0 to make an dataless header.
+        Now allows ushort pixel type.
+
+\fBASTUTIL:\fR
+    SETJD
+        The  checking  of  the  epoch  keyword   value   was   improved.
+        Previously  if  there  was  a  problem  with  the  keyword value
+        (missing or malformed) the task  would  use  the  epoch  of  the
+        observation.   Now  it  is  an  error  if  an  epoch  keyword is
+        specified but the epoch  value  can't  be  determined.   Also  a
+        leading  'B'  or  'J'  is allowed and a warning will be given if
+        the epoch value is unlikely.
+    ASTHEDIT
+        There are new astronomical functions and input/output functions.
+        The command syntax may now use "=" as a  delimiter  as  well  as
+        the whitespace.
+
+        A  new parameter "update" allows protecting images and accessing
+        read-only images for the purpose  of  calculating  and  printing
+        quantities.
+
+        The  special variable name "$I" has the value of the image name,
+        $D the current date, and $T the current time.
+
+        The case of no image name creates and deletes a temporary  image
+        so  the  task  can  be  used  purely  as  a  calculator (but see
+        astcalc).
+
+\fBCCDRED:\fR
+    CCDPROC
+        The  bad  pixel fixing was modified to allow use of pixel masks,
+        images, or the text file description.  Bad pixel masks  are  the
+        desired  description and use of text files is only supported for
+        backward compatibility.  Note that support for  the  trimmed  or
+        untrimmed conversion from text files has been eliminated.
+
+        Line-by-line  overscan/prescan  subtraction is now provided with
+        three simple algorithms.
+    COMBINE
+        The  limit of the number of images that may be combined has been
+        removed.  If the number of images exceeds the maximum number  of
+        open  images  permitted  then the images are stacked in a single
+        temporary image and  then  combined  with  the  project  option.
+        Note   that   this   will   double   the   amount  of  diskspace
+        temporarily.  There is also a limitation in this case  that  the
+        bad  pixel mask from the first image in the list will be applied
+        to all the images.
+
+        Integer  offsets  may  be  determined  from  the   image   world
+        coordinate system.
+
+        Fixed a bug where a variable was improperly used for two different 
+        purposes causing the algorithm to fail.  This also affected IMCOMBINE
+        and SCOMBINE.  See bug 316 for details. (V2.10.4p2)
+    COSMICRAYS
+        The output bad pixel data accidentally included some extra fields 
+        making it incorrect to use the file directly with BADPIXIMAGE.  
+        The extra diagnostic fields were removed.  For details, see bug 311
+        in the buglog. (V2.10.4p2)
+
+\fBECHELLE:\fR
+    ECIDENTIFY
+        The  dispersion  units are now determined from a user parameter,
+        the coordinate list, or the database entry.
+
+\fBIMRED\fR Spectral Packages:
+    DOARGUS, DOFIBERS, DOHYDRA
+        A  sky  alignment option was added.
+
+        The aperture identification can new be taken from image  header
+        keywords.
+
+        The initial arc line identifications is done with the automatic
+        line identification algorithm.
+    DOSLIT, DO3FIBER
+        The initial arc line identifications is done with the automatic
+        line identification algorithm.
+
+\fBONEDSPEC:\fR
+    Support for the Sloan Sky Survey was added by allowing multifiber
+    reductions with up to 500 fibers with non-linear dispersions. (V2.10.4p2)
+
+    BPLOT
+        Fixed a general problem in BPLOT and SLIST that caused a segmentation
+        violation error.  See buglog 312 for details. (V2.10.4p2)
+    FITPROFS
+        Modified  to  include  lorentzian  and  voigt   profiles.    The
+        parameters  and  positions  file  format  have  changed  in this
+        version.  A new parameter controls  the  number  of  Monte-Carlo
+        samples used in the error estimates.
+    IDENTIFY
+        The  dispersion  units are now determined from a user parameter,
+        the coordinate list, or the database entry.
+        A new key, 'e', has been added to add features from a line  list
+        without  doing  any  fits.  This is like the 'l' but without the
+        automatic fitting before and after adding new features.
+
+        A new key, 'b', has  been  added  to  apply  an  automatic  line
+        identification algorithm.
+
+        The  'x'  key  has  been  changed  to  use  the  automatic  line
+        identification  algorithm.   The  allows  finding  much   larger
+        shifts.
+
+        The  match  parameter  may  now  be  specified  either  in  user
+        coordinates or in pixels.  The default is now 3 pixels.
+
+        The default threshold value has been changed to 0.
+    REIDENTIFY
+        A new parameter, "search", was added to specify a search radius
+        for the automatic line identification algorithm.
+ 
+        The "nlost" parameter now also applies when not tracing; i.e. it
+        will issue a warning and not record a solution if the specified
+        number of features is lost when reidentifying against a specific
+        reference spectrum as is done with multispec data.
+
+        The  task  will  now  work  with only a warning if the reference
+        image is absent; i.e. it is possible to  reidentify  given  only
+        the database.
+
+        The  addfeatures  function will now add features before a fit if
+        there are no reference database features.   Previously  features
+        could  only  be  added  after an initial fit using the reference
+        features and, so, required the  reference  database  to  contain
+        features  for  reidentification.   This new feature is useful if
+        one wants to  uses  a  dispersion  function  from  one  type  of
+        calibration  but  wants  to add features for a different kind of
+        calibration.
+    SAPERTURES
+        This task has  been  modified  to  allow  use  of  image  header
+        keywords as done in the APEXTRACT package.
+    SARITH
+        Previously  both w1 and w2 had to be specified to select a range
+        to be used.  Now if only one is specified  the  second  endpoint
+        defaults to the first or last pixel.
+
+        The noise band in multispec data is only copied from the primary
+        spectrum and not modified.  This is a kludge until the noise  is
+        handled properly.
+
+        Fixed a problem in SARITH and SCOPY where a segmentation error 
+        occurred when a wavelength range was specified in the reverse sense 
+        of the data and without rebinning.  See buglog 323 for details.
+        (V2.10.4p2)
+    SBANDS
+        Fixed a problem in SBANDS that caused a segmentation violation when 
+        the number of input bandpasses was greater than 10.  See buglog 298
+        for details. (V2.10.4p2)
+    SCOPY
+        Previously both w1 and w2 had to be specified to select a  range
+        to  copy.   Now  if  only  one  is specified the second endpoint
+        defaults to the first or last pixel.
+    SPECPLOT
+        The  scale and offset parameters may now be a value, a filename,
+        or and image header keyword.
+
+        The 'f' key was added to toggle between world and logical  pixel
+        coordinates.
+    SPLOT
+        The profile fitting  and  deblending  was  expanded  to  include
+        lorentzian  and  voigt  profiles.   A new parameter controls the
+        number of Monte-Carlo samples used in the error estimates.
+    RSPECTEXT
+        The task now automatically senses the presence of a header.
+
+\fBAPEXTRACT:\fR
+    APALL, APSUM, APNOISE, APNORMALIZE, APSCATTER, APTRACE,
+    APRECENTER, APRESIZE, APMASK, APFIND, APFLATTEN
+        The  "apertures"  parameter  can be used to select apertures for
+        resizing, recentering, tracing, and extraction.  This  parameter
+        name   was  previously  used  for  selecting  apertures  in  the
+        recentering algorithm.  The new parameter name for this  is  now
+        "aprecenter".
+    APALL, APSUM
+        The "nsubaps" parameter now allows onedspec and  echelle  output
+        formats.   The  echelle  format is appropriate for treating each
+        subaperture as a full echelle extraction.
+    APALL
+        The  aperture  ID  table information may now be contained in the
+        image header under the keywords SLFIBnnn.
+    APSUM
+        The dispersion axis parameter was  moved  to  purely  a  package
+        parameter.
+
+        As  a  final step when computing a weighted/cleaned spectrum the
+        total  fluxes  from  the  weighted  spectrum  and   the   simple
+        unweighted   spectrum   (excluding  any  deviant  and  saturated
+        pixels) are computed and a "bias" factor of  the  ratio  of  the
+        two  fluxes  is  multiplied  into  the weighted spectrum and the
+        sigma estimate.  This makes the total fluxes the same.  In  this
+        version  the  bias  factor  is recorded in the logfile if one is
+        kept.  Also a check is made for unusual bias  factors.   If  the
+        two  fluxes  disagree  by more than a factor of two a warning is
+        given on the standard output and the logfile with the individual
+        total  fluxes as well as the bias factor.  If the bias factor is
+        negative a warning is also given and no bias factor is  applied.
+        In  the  previous  version  a negative (inverted) spectrum would
+        result.
+
+\fBRV:\fR
+    RVIDLINES, RVREIDLINES
+        These tasks now work in the units of the input spectra.
+    FXCOR
+        The input spectra are converted to Angstroms for the
+        crosscorrelation and analysis.  Thus the velocities will
+        be correctly computed regardless of the units of the
+        input spectra.
+
+\fBDAOPHOT:\fR
+    DAOFIND
+        A major bug in the DAOFIND task centering code that affects the
+        computed x and y positions was fixed. Users should refer to bug 
+        log entry number 332 for details. (V2.10.4p2)
+
+        A new roundness statistic was added to the DAOFIND output to
+        bring the task into conformance with standalone DAOPHOT II. The new
+        statistic is sensitive to and tries to eliminate detected objects
+        which are significantly elongated in directions other than 0, 90,
+        180, and 270 degrees. The original roundness statistic is stored in
+        the ground column, the new one in the sround column. The same
+        default roundness limits apply to both statistics. (V2.10.4p2)
+
+    DAOPARS
+        Added a new parameter "mergerad" to the DAOPARS parameter set.
+        Mergerad permits the user to control the merging process. If
+        mergerad is INDEF (the default setting) the default merging radius
+        is used. If mergerad is 0 object merging is turned off altogether.
+        Otherwise the user can set the merging radius to a specific value.
+        Mergerad is used by the nstar and allstar tasks, but their default
+        behavior is unchanged. (V2.10.4p2)
+ 
+        Changed the name of the "critovlap" parameter to "critsnratio" to
+        avoid confusion with the meaning of the parameter especially
+        with regard the mergerad parameter. The behavior of the parameter is
+        unchanged. (V2.10.4p2)
+.fi
+.nh
+Parameter file changes
+
+The parameter file changes below are for modifications between V2.10.4
+and V2.11.  For a list of parameter file changes between V2.10.3 and
+V2.10.4 see the file iraf/v210/params.v2104.Z in the IRAF FTP archives.
+
+In the tables below each parameter change is identified with one of the
+following codes followed by task_name.parameter_name and the description of
+the change.
+
+.nf
+    n = new parameter
+    c = changed/modified parameter
+    d = deleted parameter
+
+\fBTV:\fR
+ n  display.nsample: replaces nsample_lines
+ d  display.nsample_lines: replaced by nsample
+ n  display.bpmask: specify a bad pixel mask
+ n  display.bpdisplay: specify display mode for bad pixel mask
+ n  display.bpcolors: specify overlay colors for bad pixel mask
+ n  display.overlay: specify an overlay mask
+ n  display.ocolors: specify overlay colors for overlay mask
+ n  display.zmask: specify a sample mask for the zscale calculation
+ c  imedit.xorder: now allows a value of zero for median background
+ c  imedit.yorder: now allows a value of zero for median background
+ n  rimexam.fittype: specify a profile type to fit - default is now moffat
+ n  rimexam.iterations: specify number of iterations to adjust fitting radius
+ n  rimexam.beta: specify beta value for moffat fitting
+ c  rimexam.buffer: default value changed from 1 to 5
+ c  rimexam.width: default value changed from 2 to 5
+ c  rimexam.magzero: default value changed from 30 to 25
+ n  wcslab.overplot: specify overplotting
+
+\fBDATAIO:\fR
+ n  wfits.fextn: extension to append to output disk FITS filename - default is
+      fits
+ n  wfits.extensions: write all images to a single FITS file ? - default is no
+ n  wfits.global_hdr: prepend a global header to the FITS extensions - default
+      is yes
+
+\fBIMAGES:\fR
+ n  fmedian.zloreject: good data minimum
+ n  fmedian.zhireject: good data maximum
+ n  fmedian.verbose: verbose option
+ n  fmode.zloreject: good data minimum
+ n  fmode.zhireject: good data maximum
+ n  fmode.verbose: verbose option
+ n  median.zloreject: good data minimum
+ n  median.zhireject: good data maximum
+ n  median.verbose: verbose option
+ n  mode.zloreject: good data minimum
+ n  mode.zhireject: good data maximum
+ n  mode.verbose: verbose option
+ n  geomap.transforms: list of record names
+ n  geomap.results: results summary file
+ n  geomap.fitgeometry: fitting geometry
+ d  geomap.output: renamed to database
+ c  geomap.reject: changed from 0.0 to INDEF
+ n  [g]register.verbose: verbose option
+ d  [g]register.transform: renamed to transfo
+ n  geotran.verbose: verbose option
+ d  geotran.transform: renamed to transforms
+ c  imcombine.offsets: now allows specifying "wcs" to compute offsets from WCS
+ d  imalign.images: renamed to input
+ c  imalign.reference: went from hidden to auto
+ c  imalign.coords: reversed places with reference
+ d  imcentroid.images: renamed to input
+ c  imcentroid.reference: went from hidden to auto
+ c  imcentroid.coords: reversed places with reference
+ n  imheader.imlist: default image names
+
+\fBPLOT:\fR
+ n  graph.ltypes: specify the line types
+ n  graph.colors: specify the colors
+
+\fBPROTO:\fR
+ n  fixpix.masks: new version specifies bad pixel masks
+ n  fixpix.linterp: specify mask values for line interpolation
+ n  fixpix.cinterp: specify mask values for column interpolation
+ n  fixpix.pixels: list pixels that are modified
+ d  fixpix.badpixels: new version does not use bad pixel region description
+ c  fields.lines: default value changed from "1-9999" to "1-"
+
+\fBARTDATA:\fR
+ n  mk1dspec.profile: define the profile type
+ n  mk1dspec.gfwhm: replaces sigma for gaussian profile width
+ n  mk1dspec.lfwhm: width for lorentzian profile
+ c  artdata.randbuf: default value changed from 1000 to 0.
+ c  mkpattern.ndim: allows a value of 0 for a dataless header.
+ c  mkpattern.pixtype: allows ushort.
+ c  gallist.ar: default value changed to 0.3.
+ d  mk1dspec.sigma: replaced by gfwhm
+
+\fBASTUTIL:\fR
+ n  rvcorrect.keywpars: added to define keywords used
+ n  asthedit.prompt: used for new calculator option
+ n  asthedit.update: update the header
+ n  asthedit.oldstyle: to allow backward compatibility
+
+\fBAPEXTRACT, IMRED\fR spectral packages:
+ n  apnoise.apertures: select apertures to be used
+ n  apfit.apertures: select apertures to be used
+ n  apedit.apertures: select apertures to be used
+ n  apfind.apertures: select apertures to be used
+ n  apnormalize.apertures: select apertures to be used
+ n  apscatter.apertures: select apertures to be used
+ n  apsum.apertures: select apertures to be used
+ n  aptrace.apertures: select apertures to be used
+ n  apresize.apertures: select apertures to be used
+ n  apmask.apertures: select apertures to be used
+ n  apflatten.apertures: select apertures to be used
+ n  aprecenter.apertures: select apertures to be used
+ n  aprecenter.aprecenter: was what was previously the apertures parameter
+ n  apall.apertures: select apertures to be used
+ n  apall.aprecenter: was what was previously the apertures parameter
+
+\fBARGUS, HYDRA, SPECRED:\fR
+ n  doargus.crval: for automatic line identifications
+ n  doargus.crdelt: for automatic line identifications
+ n  doargus.skyalign: night sky alignment option
+ n  dohydra.crval: for automatic line identifications
+ n  dohydra.crdelt: for automatic line identifications
+ n  dohydra.skyalign: night sky alignment option
+ n  dofibers.crval: for automatic line identifications
+ n  dofibers.crdelt: for automatic line identifications
+ n  dofibers.skyalign: night sky alignment option
+ n  do3fiber.crval: for automatic line identifications
+ n  do3fiber.crdelt: for automatic line identifications
+
+\fBARGUS, HYDRA, KPNOCOUDE, KPNOSLIT, SPECRED:\fR
+ c  params.match: default value changed to -3 (3 pixels instead of Angstroms)
+ c  sparams.match: default value changed to -3 (3 pixels instead of Angs)
+
+\fBONEDSPEC, IMRED\fR spectral packages:
+ d  fitprofs.sigma: replaced by gfwhm
+ d  fitprofs.function: replaced by profile
+ d  fitprofs.fitsigmas: replaced by fitgfwhm
+ d  rspectext.header: removed since the task now senses the header information
+
+\fBONEDSPEC, LONGSLIT, IMRED\fR spectral packages:
+ n  identify.units: specify the desired units for the dispersion function
+ n  identify.crval: for automatic line identifications
+ n  identify.crdelt: for automatic line identifications
+ n  identify.aidpars: parameter set for automatic line identifications
+ c  identify.match: default value changed to -3 (3 pixels instead of Angstroms)
+ c  identify.threshold: default value changed from 10 to 0.
+ c  reidentify.match: default value changed to -3 (3 pixels instead of Angs)
+ c  reidentify.threshold: default value changed from 10 to 0.
+ n  reidentify.crval: for automatic line identifications
+ n  reidentify.crdelt: for automatic line identifications
+ n  reidentify.aidpars: parameter set for automatic line identifications
+ n  reidentify.search: specify a search radius for the automatic line 
+       identification algorithm
+ n  ecidentify.units: specify the desired units for the dispersion function
+ n  fitprofs.profile: define the profile type
+ n  fitprofs.gfwhm: replaces sigma for gaussian profile width
+ n  fitprofs.lfwhm: width for lorentzian profile
+ n  fitprofs.fitgfwhm: replaces fitsigmas
+ n  fitprofs.fitlfwhm: select whether to fit lorentzian profile widths
+ n  fitprofs.nerrsample: allows control of the error calculation accuracy
+ n  splot.nerrsample: allows control of the error calculation accuracy
+
+\fBCCDRED:\fR
+ c  ccdproc.fixfile: this now specifies a bad pixel mask
+ c  combine.offsets: now allows specifying "wcs" to compute from WCS
+
+\fBRV:\fR
+ n  rvcorrect.par: Added the KEYWPARS pset declaration
+
+\fBDAOPHOT:\fR
+ c  daopars.critsnratio: critical S/N ratio for group membership - changed
+       the name only from critovlap (V2.10.4p2)
+ n  daopars.mergerad: critical object merging radius in scale units
+    (V2.10.4p2)
+.fi
+.endhelp