SIMPLE = T / Fits standard
BITPIX = -32 / Bits per pixel
NAXIS = 2 / Number of axes
NAXIS1 = 135 / Axis length
NAXIS2 = 135 / Axis length
ORIGIN = 'NOAO-IRAF FITS Image Kernel July 1999' / FITS file originator
DATE = '2000-11-30T00:52:54' / Date FITS file was generated
IRAF-TLM= '17:52:54 (29/11/2000)' / Time of last modification
EXTEND = T / File may contain standard extensions
NEXTEND = 5 / Number of standard extensions
FILENAME= 'n4eya1020_mos.fits' / name of file
FILETYPE= 'SCI ' / type of data found in data file
TELESCOP= 'HST ' / telescope used to acquire data
INSTRUME= 'NICMOS ' / identifier for instrument used to acquire data
EQUINOX = 2000.0 / equinox of celestial coord. system
/ DATA DESCRIPTION KEYWORDS
ROOTNAME= 'N4EYA1020' / rootname of the observation set
IMAGETYP= 'EXT ' / type of exposure identifier
PARALLEL= 'NO ' / indicates if observation taken in parallel
PRIMESI = 'NICMOS ' / instrument designated as prime
/ TARGET INFORMATION
TARGNAME= 'M31 ' / proposer's target name
RA_TARG = 10.6847083333 / right ascension of the target (deg) (J2000)
DEC_TARG= 41.269 / declination of the target (deg) (J2000)
/ PROPOSAL INFORMATION
PROPOSID= 7171 / PEP proposal identifier
LINENUM = '1.140 ' / PEP proposal line number
PR_INV_L= 'RIEKE ' / last name of principal investigator
PR_INV_F= 'MARCIA ' / first name of principal investigator
PR_INV_M= ' ' / middle initial of principal investigator
/ EXPOSURE INFORMATION
ORIENTAT= -140.483 / position angle of image y axis (deg. e of n)
SUNANGLE= 0.690145 / angle between sun and V1 axis
MOONANGL= 1.815102 / angle between moon and V1 axis
SUN_ALT = -52.816906 / altitude of the sun above Earth's limb
FGSLOCK = 'FINE ' / commanded FGS lock (FINE,COARSE,GYROS,UNKNOWN)
DATE-OBS= '02/12/97 ' / UT date of start of observation (dd/mm/yy)
TIME-OBS= '21:11:20 ' / UT time of start of observation (hh:mm:ss)
EXPSTART= 5.078488287513E+04 / exposure start time (Modified Julian Date)
EXPEND = 5.078488306031E+04 / exposure end time (Modified Julian Date)
EXPTIME = 15.972040 / total integration time (sec)
EXPFLAG = 'NORMAL ' / Exposure interruption indicator
/ INSTRUMENT CONFIGURATION INFORMATION
CAMERA = 2 / Camera in use (1, 2, or 3)
PRIMECAM= 2 / Primary camera for internal parallels
FOCUS = 'CAMERA2 ' / In-focus camera for this observation
APERTURE= 'NIC2 ' / aperture in use (NICi,NICi-FIX,NIC2-CORON/ACQ)
OBSMODE = 'MULTIACCUM ' / array readout mode (ACCUM, MULTIACCUM, etc.)
FILTER = 'F160W ' / filter wheel element in beam during observation
NUMITER = 1 / number of exposure iterations
NREAD = 1 / ACCUM - number of initial and final readouts
NSAMP = 8 / RAMP, MULTI-ACCUM - number of samples
SAMP_SEQ= 'STEP32 ' / MultiAccum exposure time sequence name
CR_ELIM = 'NoCR ' / RAMP - onboard cosmic ray detection used
SAT_ELIM= 'YES ' / RAMP - on-board saturation detection used
CRTHRESH= 0.0 / RAMP - on-board cosmic ray detect threshold
SATHRESH= 0.0 / RAMP - on-board saturation threshold
VARSCALE= 0.0 / RAMP - on-board scale factor for variance
PATT_OFF= 'SAM ' / pattern offset method (SAM, FOM, etc.)
PATTERN = 'SPIRAL-DITH ' / pattern type
PFRAME = ' ' / ref frame of pattern (DETECTOR, SKY)
PORIENT = -140.483 / orientation of pattern on sky (deg)
NUMPOS = 4 / number of positions in pattern
DITHSIZE= .43 / size of dither steps (arc seconds)
CHOPSIZE= 0.000000 / size of chop steps (arc seconds)
PATT_POS= 1 / postion number in pattern sequence
FOMXPOS = 0.0 / X offset of FOV using NICMOS FOM
FOMYPOS = 0.0 / Y offset of FOV using NICMOS FOM
NFXTILTP= 0.448201E-02 / Fom X TILT Position (arcsec)
NFYTILTP= 0.204524E-02 / Fom Y TILT Position (arcsec)
NPXTILTP= 2805.0 / PAM X TILT Position (arcsec)
NPYTILTP= 2829.0 / PAM Y TILT Position (arcsec)
NPFOCUSP= 0.617914 / Pam FOCUS Position (deg)
TIMEPATT= 12 / timing pattern id
READOUT = 'FAST ' / detector array readout rate (FAST, SLOW)
HCLKRATE= 12.5 / horizontal clock rate (microseconds)
VIDEO_BW= 400.0 / readout video bandwidth (kHz)
ADCZERO = -18000.0 / analog-digital conversion zero level (DN)
ADCGAIN = 5.0 / analog-digital conversion gain (electrons/DN)
/ BACKGROUND KEYWORDS
BACKEST1= 0.0 / background estimate number 1
BACKEST2= 0.000000 / background estimate number 2
BACKEST3= 0.000000 / background estimate number 3
/ PHOTOMETRY KEYWORDS
PHOTMODE= ' ' / photometry mode
PHOTFLAM= 0.0 / inverse sensitivity (ergs/cm**2/Angstrom/DN)
PHOTFNU = 0.0 / inverse sensitivity (JY*sec/DN)
PHOTZPT = 0.0 / ST magnitude system zero point (mag)
PHOTPLAM= 0.0 / pivot wavelength of the photmode (Angstroms)
PHOTBW = 0.0 / RMS bandwidth of the photmode (Angstroms)
/ CALNICA CALIBRATION REFERENCE FILES
MASKFILE= 'nc2_msk_mjr.fits' / static data quality file
NOISFILE= 'h4216218n_noi.fits' / detector read noise file
NLINFILE= 'k541124pn_lin.fits' / detector nonlinearities file
DARKFILE= 'nc2step32_drk_mjr.fits' / dark current file
FLATFILE= 'nc2f160w_flt_rit.fits' / flat field file
PHOTTAB = 'ntab$ha914251n_pht.fits' / photometric calibration table
BACKTAB = ' ' / background model parameters table
/ CALNICA CALIBRATION REFERENCE FILE PEDIGREE
MASKPDGR= 'INFLIGHT' / static data quality file pedigree
NOISPDGR= 'GROUND 27/01/1997' / detector read noise file pedigree
NLINPDGR= 'GROUND ' / detector nonlinearities file pedigree
DARKPDGR= 'INFLIGHT' / dark current file pedigree
FLATPDGR= 'INFLIGHT' / flat field file pedigree
PHOTPDGR= ' ' / photometric calibration table pedigree
BACKPDGR= ' ' / background model parameters table pedigree
/ CALNICA CALIBRATION SWITCHES: perform,omit
BIASCORR= 'PERFORM ' / subtract ADC bias level
ZOFFCORR= 'PERFORM ' / subtract MULTI-ACCUM zero read
MASKCORR= 'PERFORM ' / data quality initialization
NOISCALC= 'PERFORM ' / calculate statistic errors
NLINCORR= 'PERFORM ' / correct for detector nonlinearities
DARKCORR= 'PERFORM ' / dark correction
FLATCORR= 'PERFORM ' / flat field correction
UNITCORR= 'PERFORM ' / convert to count rates
PHOTCALC= 'OMIT ' / calculate photometric keywords
CRIDCALC= 'PERFORM ' / identify cosmic ray hits
BACKCALC= 'PERFORM ' / calculate background estimates
WARNCALC= 'PERFORM ' / generate user warnings
/ CALNICA CALIBRATION INDICATORS: performed, skipped, omitted
BIASDONE= 'PERFORMED' / subtract ADC bias level
ZOFFDONE= 'PERFORMED' / subtract MULTI-ACCUM zero read
MASKDONE= 'PERFORMED' / data quality initialization
NOISDONE= 'PERFORMED' / calculate statistic errors
NLINDONE= 'PERFORMED' / correct for detector nonlinearities
DARKDONE= 'PERFORMED' / dark correction
FLATDONE= 'PERFORMED' / flat field correction
UNITDONE= 'PERFORMED' / convert to count rates
PHOTDONE= 'OMITTED ' / calculate photometric keywords
CRIDDONE= 'PERFORMED' / identify cosmic ray hits
BACKDONE= ' ' / calculate background estimates
WARNDONE= ' ' / generate user warnings
CALSTAGE= 'CALNICB ' / state of calibration
CAL_VER = 'Version 2.3.1' / CALNIC code version
/ CALNICB CALIBRATION INFORMATION
ILLMCORR= 'OMIT ' / background illumination pattern subtraction
ILLMDONE= 'OMITTED ' / background illumination pattern subtraction
ILLMFILE= ' ' / background illumination pattern file name
ILLMPDGR= ' ' / background illumination pattern file pedigree
MEAN_BKG= 0.000000 / mean background level (DN/sec)
/ ASSOCIATION KEYWORDS
ASN_ID = 'N4EYA1020 ' / unique identifier assigned to association
ASN_TAB = 'n4eya1020_asn.fits' / name of the association table
ASN_MTYP= 'PROD-TARG' / Role of the Exposure in the Association
ZSIGDONE= 'PERFORMED' /
BARSDONE= 'PERFORMED' /
EXPNAME = 'N4EYA1020' / 9 character exposure identifier
BUNIT = 'COUNTS/S' / brightness units
/ World Coordinate System and Related Parameters
CRPIX1 = 46. / x-coordinate of reference pixel
CRPIX2 = 57. / y-coordinate of reference pixel
CRVAL1 = 1.068483289484E+01 / first axis value at reference pixel
CRVAL2 = 4.126971045114E+01 / second axis value at reference pixel
CTYPE1 = 'RA---TAN ' / the coordinate type for the first axis
CTYPE2 = 'DEC--TAN ' / the coordinate type for the second axis
CD1_1 = 0.163323E-04 / partial of first axis coordinate w.r.t. x
CD1_2 = -0.133450E-04 / partial of first axis coordinate w.r.t. y
CD2_1 = -0.134712E-04 / partial of second axis coordinate w.r.t. x
CD2_2 = -0.161793E-04 / partial of second axis coordinate w.r.t. y
/ DATA PACKET INFORMATION
FILLCNT = 0 / number of segments containing fill
ERRCNT = 0 / number of segments containing errors
PODPSFF = F / podps fill present (T/F)
STDCFFF = F / ST DDF fill present (T/F)
STDCFFP = 'x5569 ' / ST DDF fill pattern (hex)
/ READOUT PARAMETERS
SAMPNUM = 7 / MULTIACCUM sample number
SAMPTIME= 15.972040 / total integration time (sec)
DELTATIM= 7.993592 / integration time of this sample (sec)
ROUTTIME= 5.078488297610E+04 / UT time of array readout (MJD)
TDFTRANS= 0 / number of TDF transitions during current sample
/ DATA QUALITY
ENGQUAL = 'NORMAL ' / engineering quality (NORMAL, FLAGS)
NQUAL00 = 64549 / number of pixels with all DQ flags equal zero
NQUAL01 = 0 / number of pixels with Reed-Solomon flag
NQUAL02 = 0 / number of pixels with NonLinearity flag
NQUAL03 = 0 / number of pixels with Dark flag set
NQUAL04 = 0 / number of pixels with Flat Field flag set
NQUAL05 = 0 / number of pixels with Background flag set
NQUAL06 = 0 / number of pixels with Defective flag set
NQUAL07 = 0 / number of pixels with Saturated flag set
NQUAL08 = 0 / number of pixels with Missing flag set
NQUAL09 = 46 / number of pixels with Bad Pixel flag set
NQUAL10 = 0 / number of pixels with Cosmic Ray flag set
NQUAL11 = 3512 / number of pixels with Source flag set
NQUAL12 = 642 / number of pixels with unassigned flag set
GOODMEAN= 5.1268899E-01 / mean of good pixels (no dq flags set)
GOODSTDV= 4.0853133E+00 / standard deviation of good pixels
GOODMIN = -8.7012987E+00 / min value of good pixels
GOODMAX = 1.9985241E+01 / max value of good pixels
QAMEAN = -1.1408323E+00 / mean of good pixels in quadrant A
QASTDV = 3.4462359E+00 / standard deviation of good pixels in quad A
QAMIN = -8.7012987E+00 / min value of good pixels in quadrant A
QAMAX = 1.8158186E+01 / max value of good pixels in quadrant A
QBMEAN = 2.1578935E-01 / mean of good pixels in quadrant B
QBSTDV = 3.9785597E+00 / standard deviation of good pixels in quad B
QBMIN = -8.1109190E+00 / min value of good pixels in quadrant B
QBMAX = 1.9985241E+01 / max value of good pixels in quadrant B
QCMEAN = 2.1434238E+00 / mean of good pixels in quadrant C
QCSTDV = 4.2084570E+00 / standard deviation of good pixels in quad C
QCMIN = -7.1400890E+00 / min value of good pixels in quadrant C
QCMAX = 1.8251173E+01 / max value of good pixels in quadrant C
QDMEAN = 1.0556166E+00 / mean of good pixels in quadrant D
QDSTDV = 4.0028386E+00 / standard deviation of good pixels in quad D
QDMIN = -7.8203468E+00 / min value of good pixels in quadrant D
QDMAX = 1.9099174E+01 / max value of good pixels in quadrant D
HISTORY ZSIGCORR performed
HISTORY ZOFFCORR performed using n4eya1pzq_raw.fits
HISTORY MASKCORR performed using nc2_msk_mjr.fits
HISTORY INFLIGHT
HISTORY BIASCORR performed
HISTORY NOISCALC performed using h4216218n_noi.fits
HISTORY GROUND 27/01/1997
HISTORY TV-based NIC2 FAST nreads=1 nois
HISTORY DARKCORR performed using nc2step32_drk_mjr.fits
HISTORY INFLIGHT
HISTORY NLINCORR performed using k541124pn_lin.fits
HISTORY GROUND
HISTORY NIC3 linearity file zero-charge based corrected,orientation correcte
HISTORY BARSCORR performed
HISTORY FLATCORR performed using nc2f160w_flt_rit.fits
HISTORY INFLIGHT
HISTORY UNITCORR performed
HISTORY CRIDCALC performed
GOODMEDN= -1.7399101E-01 /
QAMEDN = -1.7553984E+00 /
QBMEDN = -4.1383433E-01 /
QCMEDN = 1.4782487E+00 /
QDMEDN = 2.7362785E-01 /
HISTORY Subtracted constant bkg level = 18.5258
HISTORY Mosaiced images:
HISTORY n4eya1pzq_cal.fits
HISTORY n4eya1q0q_cal.fits
HISTORY n4eya1q1q_cal.fits
HISTORY n4eya1q2q_cal.fits
ROOTNAME= 'N4EYA1020' /
WCSDIM = 2
LTV1 = -85.
LTV2 = -74.
LTM1_1 = 1.
LTM2_2 = 1.
WAT0_001= 'system=image'
WAT1_001= 'wtype=tan axtype=ra'
WAT2_001= 'wtype=tan axtype=dec'
END
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