IRAS Pointed Observations FormatTable 1 shows the header of the DS11342B1 image, the intensity map centered at RA = 5h 43.5m, DEC = -0d 7.8m, at 12 microns. Table 1. Sample FITS header SIMPLE = T / STANDARD FITS FORMAT BITPIX = 16 / 2 BYTE TWOS-COMPL INTEGERS NAXIS = 3 / NUMBER OF AXES NAXIS1 = 19 / NZ = Z (CROSS-SCAN) GRID DIMENSION NAXIS2 = 320 / NY = Y (IN-SCAN) GRID DIMENSION NAXIS3 = 1 / # WAVELENGTHS BSCALE = 2.273646E+05 / TRUE=TAPE*BSCALE + BZERO BZERO = 0.0 BUNIT = 'JY/SR ' / INTN BLANK = -32768 / TAPE VALUE FOR EMPTY CELL CRVAL1 = 8.588284E+01 / RA AT ORIGIN (DEGREES) CRPIX1 = 10. / Z-AXIS ORIGIN (CELL) = (NZ/2)+1 CTYPE1 = 'RA---SIN' / DECREASES IN VALUE AS SAMPLE INDEX COMMENT INCREASES (ORTHOGRAPHIC PROJECTION) CDELT1 = -8.333333E-03 / Z-GRID CELL WIDTH (DEGREES) CROTA1 = 0.0 / TWIST ANGLE UNDEFINED FOR Z-AXIS CRVAL2 = -1.302655E-01 / DEC AT ORIGIN (DEGREES) CRPIX2 = 161. / Y-AXIS ORIGIN (CELL)= (NY/2)+1 CTYPE2 = 'DEC--SIN' / INCREASES IN VALUE AS LINE INDEX COMMENT INCREASES (ORTHOGRAPHIC PROJECTION) CDELT2 = 2.083332E-03 / Y-GRID CELL WIDTH (DEGREES) CROTA2 = -1.796800E+02 / ROTATES +NAXIS2 INTO +DEC AXIS (ANGLE COMMENT MEASURED POSITIVE CCW FROM +NAXIS2 TO COMMENT +DEC) (DEGREES) CRVAL3 = 1.2E-05 / WAVELENGTH IN METERS CRPIX3 = 1. CTYPE3 = 'LAMBDA ' CDELT3 = 0. CROTA3 = 0. DATAMAX = 1.182296E+08 / JY/SR (TRUE VALUE) DATAMIN = -2.501010E+06 / JY/SR (TRUE VALUE) BIAS = 2.667352E+07 / BIAS LEVEL (GRID REF) IN JY/SR EPOCH = 1950. / EME50 DATE-OBS= '22/ 9/83' / DATE OF OBSERVATION (DD/MM/YY) DATE = ' 1/11/85' / DATE THIS TAPE WRITTEN (DD/MM/YY) ORIGIN = 'JPL-IRAS' / INSTITUTION TELESCOP= 'IRAS ' INSTRUME= 'DEEPSKY ' COMMENT DSSID = DS01 COMMENT SOP = 480; OBS = 39 DSKYGRID= 11342. / DEEPSKY GRID NO. DATE-CR = '50151735' / DSCO O/P FILE CREATION DATE(YDDDHHMM) COMMENT EST. MEDIAN NOISE = 4.547292E+05 JY/SR COMMENT GRID TWIST = 3.200000E-01 (DEG) MEAS- COMMENT URED FROM SOUTH TO +Y, CW IS POSITIVE. COMMENT GAIN NORM. USED = 9.300000E-01 COMMENT MFILT = 1 COMMENT KFILT = 0 OBJECT = 'MC2255 ' / OBSERVER I.D.+IGO'S A.O.NO. COMMENT IGO'S REP. SEQ. NO. = 0 OBSERVER= 'DSD01A ' / DS01,2 SIS: C1 FIELD COMMENT OBJ.NAME NO. (C2) FIELD = 19 COMMENT DS01,2 SIS: D(1-4) = 5 43 31 6 COMMENT DS01,2 SIS: E(1-3) = 89 46 0 COMMENT DS01,2 SIS: PROG = DSD01A COMMENT REFERENCES: COMMENT IRAS SDAS SOFTWARE INTERFACE SPECIFICATION(SIS) #623-94/NO. DS01 COMMENT IRAS SDAS SOFTWARE INTERFACE SPECIFICATION(SIS) #623-94/NO. DS02 COMMENT THE GUIDE TO IRAS POINTED OBSERVATIONS, NOVEMBER 1985 COMMENT IRAS/SDAS SUBSYSTEM DESIGN SPEC.,DEEP SKY SURVEY SUBSYSTEM (#623-75) COMMENT ASTRON. ASTROPHYS. SUPPL. SER. 44,(1981) 363-370(RE:FITS) END |