Re: Sample header info

["Glenn Gombert" <glenngombert@hotmail.com>]

Doug,

  I think that it is very much dependant upon the site and the processing 
involved... Dark sky sites ..like Arne has air mass would be very much a 
factor...light polluted sites..like we have in the MidWest (with very few 
really 'photometric' nights...I don't think airmass would make much of a 
difference...but could of course be included for completeness sake...

  Of course we would want to include heliocentric JD  in all of our 'raw' 
image headers...

Best Reguards,
Glenn G.


>From: Doug Welch <welch@physics.mcmaster.ca>
>To: TASS List <tass@listserv.wwa.com>
>Subject: Sample header info
>Date: Mon, 6 Nov 2000 16:27:27 -0500 (EST)
>
>
>Folks,
>
>I think that it would be a mistake to not include easily
>computable information like airmass and heliocentric JD in the
>header at the time of image creation. This removes an inevitable
>impediment to progress later on. I also think that it *is* a
>good idea to record the steps of how the image has been mutilated.
>
>Here is a FITS header from a WIYN image I took a few years back
>for reference. It is overkill, to be sure, but it does illustrate
>what others have done. (I would have added HJD, as well).
>
>Cheers,
>Doug
>
>
>dcd0009.imh[2043,2042][real]: M13 B 15sec
>No bad pixels, min=unknown, max=unknown
>Line storage mode, physdim [2048,2042], length of user area 2512 s.u.
>Created Mon 16:03:34 08-Mar-1999, Last modified Mon 16:03:34 08-Mar-1999
>Pixel file "HDR$dcd0009.pix" [ok]
>'KPNO-IRAF'           /
>'15-07-97'            /
>New copy of dcd0009.imh
>IRAF-MAX=           0.000000E0  /  DATA MAX
>IRAF-MIN=           0.000000E0  /  DATA MIN
>IRAF-BPX=                   32  /  DATA BITS/PIXEL
>IRAFTYPE= 'REAL    '            /  PIXEL TYPE
>HDR_REV = '1.010  13Jul94     (title @ end of pic; UTSHUT)' /
>ORIGPIC = 'obj0371'            / Original picture file name
>OPICNUM =                  371 / Original picture number
>NAMPSYX = '1 1'                / Num amps in y & x (eg. '2 2'=quad)
>AMPLIST = '11'                 / Readout order in y,x
>OBSERVAT= 'KPNO'               / Origin of data
>TELESCOP= 'WIYN3.5m'           / Specific system
>DETECTOR= 's2kb'               / Detector (CCD type, photon counter, etc.)
>IMAGETYP= 'OBJECT'             / Type of picture (object, dark, etc.)
>PREFLASH=             0.000000 / Preflash time in secs
>CCDSUM  = '1 1'                / On chip summation (X,Y)
>CCDSEC  = '[1:2043,3:2044]'    / Section in full CCD for DATASEC
>CAMTEMP =               -110.3 / CCD Temperature
>DEWTEMP =               -176.2 / Dewar Temperature
>DATE-OBS= '13/07/97'           / Date (dd/mm/yy) of observation
>UTSHUT  = '16:34:45.0'         / UT of shutter open
>EXPTIME =               15.000 / Exposure time in secs
>DARKTIME=               18.247 / Total elapsed time in secs
>DCS_TIME=                 3000 / (ns) DCS integrator slope time
>GAIN    = '7.5'                / electrons per ADU
>RDNOISE = '14'                 / electrons
>READTIME=                20200 / (ns) unbinned pixel read time
>WAVEFILE= 's2kb Sat Jul 12 16:02:11 1997' /
>RECID   = 'wiyn.imager.970715.064520' / archive ID for observation
>UT      = ' 6:45:19.02'         /  universal time
>ST      = '18:51:34.34'         /  sidereal time
>EL      = '62:55:40.75'        / elevation
>AZ      = '-71:26:34.29'       / azimuth
>TRACK   = 'enabled'            / tracking
>COORDS  = 'Helio. mean FK5'    / coordinate system
>RA      = '16:41:49.16'         /  Telescope RA
>DEC     = '36:27:13.16'         /  Telescope DEC
>RAOFFST = '00:00:0.00'         / Telescope RA offset
>DECOFFST= '00:00:0.00'         / Telescope DEC offset
>RADECSYS= 'FK5'                / coordinate system
>TARGRA  = '16:39:54.19'        / right ascension
>TARGDEC = '36:33:16.30'        / declination
>EQUINOX =               1997.6 / equinox of position
>EPOCH   =               1997.6 / same as EQUINOX (for back compat.)
>ZD      =               27.112 / zenith distance
>AIRMASS =             1.123176 / airmass at start of exposure
>ROTANGLE=                -27.1 / rotator angle, degrees CW from N
>FILTERS = 'Harris_B'           / fsa filter name
>FILTNUM =                    6 / fsa filter number
>FILTWHEL=                    2 / fsa filter wheel
>TRIM    = 'Jul 15 15:40 Trim data section is [1:2043,3:2044]'
>OVERSCAN= 'Jul 15 15:40 Overscan section is [2049:2080,1:2048] with 
>mean=757.98'
>ZEROCOR = 'Jul 15 15:40 Zero level correction image is Zero'
>CCDPROC = 'Mar  8 16:03 CCD processing done'
>HISTORY New copy of obj0371.imh
>WCSDIM  =                    2
>LTV2    =                  -2.
>LTM1_1  =                   1.
>LTM2_2  =                   1.
>WAT0_001= 'system=physical'
>WAT1_001= 'wtype=linear'
>WAT2_001= 'wtype=linear'
>FLATCOR = 'Mar  8 16:03 Flat field image is FlatHarris_B with 
>scale=11798.85'
>
>
>
>

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