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# SUBSECTION -- Make a subsection CCD observation
procedure subsection (subimage, image)
string subimage {prompt="Subsection image name"}
string image {prompt="Full image name"}
int ncols=82 {prompt="Number of columns"}
int nlines=50 {prompt="Number of lines"}
string ccdsec="[26:75,26:75]" {prompt="CCD section"}
string datasec="[1:50,1:50]" {prompt="Data section"}
string trimsec="" {prompt="Trim section"}
string biassec="[51:82,1:50]" {prompt="Bias section"}
bool overwrite=no {prompt="Overwrite existing image?"}
begin
string im, imdata, s
real biasval, sigma
im = subimage
imdata = image
biasval = artobs.biasval
sigma = artobs.sigma
if (access (im//".imh") == yes)
im = im // ".imh"
if (access (im//".hhh") == yes)
im = im // ".hhh"
if (access (im) == yes) {
if (overwrite == yes)
imdelete (im, verify=no)
else
return
}
# Create the image.
s = "[1:" // str (ncols) // ",1:" // str(nlines) // "]"
imcopy (imdata//s, im, verbose=no)
# Copy subsection image.
imcopy (imdata//ccdsec, im//datasec, verbose=no)
# Add bias.
if (biasval != 0.)
mkimage (im//biassec, "replace", biasval, slope=0., sigma=sigma,
seed=0)
# Set image header
ccdhedit (im, "ccdsec", ccdsec, type="string")
ccdhedit (im, "datasec", datasec, type="string")
ccdhedit (im, "trimsec", trimsec, type="string")
ccdhedit (im, "biassec", biassec, type="string")
end
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