IRAF ABC
IRAF ABC
IRAF ABC
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8 HWANG & LEE<br />
(pclip = -0.5) pclip: Percentile clipping parameter<br />
(blank = 0.) Value if there are no pixels<br />
(mode = ql)<br />
:go כ .<br />
(cf. Ctrl-C: ,כ Ctrl-D: )<br />
*****************NOTE** : <strong>IRAF</strong> task help <br />
cc> help zerocombine<br />
[] help (task name)<br />
help !!!<br />
**********************<br />
4.1. Dark<br />
cc> imstat DARK*[101:900,101:900]<br />
[hshwang@localhost work]$ ls DARK* > dark.list<br />
bias imstat , list . dark image combine bias<br />
combine Zero.fits ccdproc task .<br />
cc> epar ccdproc<br />
images = @dark.list List of CCD images to correct<br />
(fixpix =<br />
no) Fix bad CCD lines and columns<br />
(oversca=<br />
no) Apply overscan strip correction<br />
(trim = no) Trim the image<br />
(zerocor=<br />
yes) Apply zero level correction<br />
(darkcor=<br />
no) Apply dark count correction<br />
(flatcor=<br />
no) Apply flat field correction<br />
(illumco=<br />
no) Apply illumination correction<br />
(zero = Zero) Zero level calibration image<br />
:Ctrl-D () .<br />
darkcomb task .<br />
cc> darkcomb @dark.list out=Dark.fits combine=average reject=minmax \<br />
ccdtype="" process=yes scale=exposure rdnoise=7.6 gain=5.04<br />
4.2. Flat<br />
cc> imstat f*[101:900,101:900]<br />
[hshwang@localhost work]$ ls f*fits > flat.list
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