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Interactive Keystroke Commands
? Print help
: Colon commands
v Verify the critical parameters
w Save the current parameters
d Plot radial profile of current star
i Interactively set parameters using current star
c Fit center for current star
t Fit sky around cursor
a Average sky values fit around several cursor positions
s Fit sky around current centered star
p Do photometry for current star, using current sky
o Do photometry for current star, using current sky, output results
f Do photometry for current star
spbar Do photometry for current star, output results
m Move to next star in coordinate list
n Do photometry for next star in coordinate list, output results
l Do photometry for remaining stars in coordinate list, output results
e Print error messages
r Rewind coordinate list
q Exit task
Photometry parameters are listed or set with the following commands.
Colon commands
:show [data/center/sky/phot] List the parameters
:m [n] Move to next [nth] star in coordinate list
:n [n] Do photometry for next [nth] star in coordinate list, output results
Colon Parameter Editing Commands
# Image and file name parameters
:image [string] Image name
:coords [string] Coordinate file name
:output [string] Output file name
# Data dependent parameters
:scale [value] Image scale (units per pixel)
:fwhmpsf [value] Full width half maximum of PSF (scale units)
:emission [y/n] Emission feature (y), absorption (n)
:sigma [value] Standard deviation of sky (counts)
:datamin [value] Minimum good data value (counts)
:datamax [value] Maximum good data value (counts)
# Noise parameters
:noise [string] Noise model (constant|poisson)
:gain [string] Gain image header keyword
:ccdread [string] Readout noise image header keyword
:epadu [value] Gain (electrons per adu)
:readnoise [value] Readout noise (electrons)
# Observations parameters
:exposure [string] Exposure time image header keyword
:airmass [string] Airmass image header keyword
:filter [string] Filter image header keyword
:obstime [string] Time of observation image header keyword
:itime [value] Integration time (time units)
:xairmass [value] Airmass value (number)
:ifilter [string] Filter id string
:otime [string] Time of observation (time units)
# Centering algorithm parameters
:calgorithm [string] Centering algorithm
:cbox [value] Width of the centering box (scale units)
:cthreshold [value] Centering intensity threshold (sigma)
:cmaxiter [value] Maximum number of iterations
:maxshift [value] Maximum center shift (scale units)
:minsnratio [value] Minimum S/N ratio for centering
:clean [y/n] Clean subraster before centering
:rclean [value] Cleaning radius (scale units)
:rclip [value] Clipping radius (scale units)
:kclean [value] Clean K-sigma rejection limit (sigma)
# Sky fitting algorithm parameters
:salgorithm [string] Sky fitting algorithm
:skyvalue [value] User supplied sky value (counts)
:annulus [value] Inner radius of sky annulus (scale units)
:dannulus [value] Width of sky annulus (scale units)
:khist [value] Sky histogram extent (+/- sky sigma)
:binsize [value] Resolution of sky histogram (sky sigma)
:smooth [y/n] Lucy smooth the sky histogram
:sloclip [value] Low-side clipping factor in percent
:shiclip [value] High-side clipping factor in percent
:smaxiter [value] Maximum number of iterations
:snreject [value] Maximum number of rejection cycles
:sloreject [value] Low-side pixel rejection limits (sky sigma)
:shireject [value] High-side pixel rejection limits (sky sigma)
:rgrow [value] Region growing radius (scale units)
# Photometry parameters
:apertures [string] List of aperture radii (scale units)
:zmag [value] Zero point of magnitude scale
# Plotting and marking parameters
:mkcenter [y/n] Mark computed centers on display
:mksky [y/n] Mark the sky annuli on the display
:mkapert [y/n] Mark apertures on the display
:radplot [y/n] Plot radial profile of object
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