II. User's Guide to the 2MASS All-Sky Data Release

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5. Extended Source Postage Stamp Images

Table 1: Example Postage Stamp Image Header

BITPIX  =                  -32
NAXIS   =                    3
NAXIS1  =                   85
NAXIS2  =                   85
NAXIS3  =                    6
ORIGIN  = '2MASS   '           / 2MASS Survey Camera
TELESCOP= '2MASS   '           / North=Mt.Hopkins,South=CTIO
GID     = '004660  '           / 2MASS ID #
NNAME   = 'n/a     '           / NED Cat Name
SCANNO  = '111     '           / Scan Number
COADDNO = '115     '           / Coadd Number
ORDATE  = '980717s '           / Observation Ref Date (yymmdd)
UTDATE  = '980717  '           / UT Date of Frame (IC) (yymmdd)
UT      = '07:16:02.08'        / Time of Frame (IC) (sxgsml)
DATE-OBS= '1998-07-17T07:16:02.08' / Observation Ref Date
EQUINOX =                2000. / Equinox
CTYPE1  = 'RA---SIN'           / Orthographic Projection
CTYPE2  = 'DEC---SIN'          / Orthographic Projection
CTYPE3  = 'JHKs cube'          / 1=J,2=H,3=Ks; 4=J,5=H,6=Ks
RA      =          325.3026428 / RA  at Frame Center, J2000 (deg)
DEC     =         -21.39953041 / Dec at Frame Center, J2000 (deg)
CRVAL1  =          325.3026428 / RA  at Frame Center, J2000 (deg)
CRVAL2  =         -21.39953041 / Dec at Frame Center, J2000 (deg)
CRPIX1  =                  43.
CRPIX2  =                  43.
CROTA2  =       0.009012495168 / Image Twist  E of N, J2000 (deg)
CDELT1  =     -0.0002777777845 / Axis 1 Pixel Size (deg)
CDELT2  =      0.0002777777845 / Axis 2 Pixel Size (deg)
JSKYVAL =          40.93516541 / GALWORKS J Sky Measurement
JSKYSIG =         0.4212789536 / GALWORKS J Noise Measurement
HSKYVAL =          170.2278442 / GALWORKS H Sky Measurement
HSKYSIG =         0.6239204407 / GALWORKS H Noise Measurement
KSKYVAL =           231.008194 / GALWORKS K Sky Measurement
KSKYSIG =         0.7055187225 / GALWORKS K Noise Measurement
CALID   = '  CALIBRATED'       / Calibration ID
JSEESH  =          1.004999995 / Seeing J shape parameter
HSEESH  =         0.9559999704 / Seeing H shape parameter
KSEESH  =         0.9950000048 / Seeing K shape parameter
JMAGZP  =              20.8804 /   Calibrated J zero point from CALMAN
HMAGZP  =              20.4315 /   Calibrated H zero point from CALMAN
KMAGZP  =              19.9106 /   Calibrated K zero point from CALMAN
AMASS_FC=          1.018351674 / Airmass (aprox) at this position
COMMENT > Planes 1, 2 and 3 represent the background
COMMENT > subtracted images of the J, H and Ks bands;
COMMENT > Planes 4,5,6 represent the background **and**
COMMENT > star subtracted images of the J, H and Ks bands
HISTORY > GALWORKS Version 3
HISTORY > image created by galworks,  Tom Jarrett, IPAC/Caltech/JPL

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Return to Section II.5.