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Size: 1717
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← Revision 5 as of 2022-10-08 17:07:33 ⇥
Size: 1971
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| #acl VadimBurwitz:read,write,delete,revert,admin SherrySuyu:read,write,delete,revert AlejandraMelo:read,write,delete,revert AdamKinasz:read,write,delete,revert WienczyslawBykowski:read,write,delete,revert PiotrSybilski:read,write,delete,revert All:read |
Basic detrending
For now just throw away the overscan (-> trim the image to 0..4095;0..4095)
Master bias
ficalib --rewrite-output-name '.fits|_proc.fits' --trim 0:0:4095:4095 -i bias*.fits ficombine --mode median -o master_bias.fits bias*_proc.fits
Master Dark
Use largest exposure time for master dark
ficalib --rewrite-output-name '.fits|_proc.fits' --input-master-bias master_bias.fits --trim 0:0:4095:4095 -i dark_300s_*.fits ficombine --mode median -o master_dark.fits dark_30s*_proc.fits
Flats
- Rescale dark (exptime-correction)
- Scale images to common level (post-scale 30000)
- Stack images with reject-median (to get rid of stars in the images IF offsetting between images was done)
ficalib --rewrite-output-name '.fits|_proc.fits' --input-master-bias master_bias.fits --input-master-dark master_dark.fits --exptime-correction --post-scale 30000 --trim 0:0:4095:4095 -i flat_R_*.fits ficombine --mode rejmed -o master_flat_R.fits flat_R_*_proc.fits
Objects
- Subtract rescaled dark (exptime-correction)
ficalib --rewrite-output-name '.fits|_proc.fits' --input-master-bias master_bias.fits --input-master-dark master_dark.fits --input-master-flat master_flat_R.fits --exptime-correction --trim 0:0:4095:4095 -i obj_R_*.fits
Now either run sextractor directly on image or try with grmatch+fitrans+ficombine to stack (see here how to the alignment of the images)