The header of the FITS file is listed below,
followed by a sample of values (limited to 1000 lines).
#--- fig/vlac.fits
#ext xtension bpx (dim) x2880 extname
#-------------------------------------------------------------------------------
#000 main -32 (512x512x1x1) 373b [266.83347-28.38097] [FREQ=9.07121e+0
9] [STOKES=1]
#-------------------------------------------------------------------------------
SIMPLE = T /
BITPIX = -32 /
NAXIS = 4 /
NAXIS1 = 512 /
NAXIS2 = 512 /
NAXIS3 = 1 /
NAXIS4 = 1 /
EXTEND = T /Tables following main image
BLOCKED = T /Tape may be blocked
OBJECT = 'SGRB2 ' /Source name
TELESCOP= 'VLA ' /
INSTRUME= 'VLA ' /
OBSERVER= 'AM761 ' /
DATE-OBS= '2003-02-19' /Obs start date YYYY-MM-DD
DATE-MAP= '2007-11-27' /Last processing date YYYY-MM-DD
BSCALE = 1.00000000000E+00 /REAL = TAPE * BSCALE + BZERO
BZERO = 0.00000000000E+00 /
BUNIT = 'JY/BEAM ' /Units of flux
EQUINOX = 2.000000000E+03 /Epoch of RA DEC
COMMENT / IEEE not-a-number used for blanked f.p. pixels
VELREF = 257 />256 RADIO, 1 LSR 2 HEL 3 OBS
ALTRVAL = 6.50000000000E+04 /Altenate FREQ/VEL ref value
ALTRPIX = 1.000000000E+00 /Altenate FREQ/VEL ref pixel
OBSRA = 2.66833333333E+02 /Antenna pointing RA
OBSDEC = -2.83808333333E+01 /Antenna pointing DEC
RESTFREQ= 9.07205000000E+09 /Rest frequency
DATAMAX = 4.153280258E+00 /Maximum pixel value
DATAMIN = -7.810071707E-01 /Minimum pixel value
CTYPE1 = 'RA---SIN' /
CRVAL1 = 2.66833333333E+02 /
CDELT1 = -2.777777845E-04 /
CRPIX1 = 2.560000000E+02 /
CROTA1 = 0.000000000E+00 /
CTYPE2 = 'DEC--SIN' /
CRVAL2 = -2.83808333333E+01 /
CDELT2 = 2.777777845E-04 /
CRPIX2 = 2.570000000E+02 /
CROTA2 = 0.000000000E+00 /
CTYPE3 = 'FREQ ' /
CRVAL3 = 9.07120769217E+09 /
CDELT3 = 4.492187500E+06 /
CRPIX3 = 1.000000000E+00 /
CROTA3 = 0.000000000E+00 /
CTYPE4 = 'STOKES ' /
CRVAL4 = 1.00000000000E+00 /
CDELT4 = 1.000000000E+00 /
CRPIX4 = 1.000000000E+00 /
CROTA4 = 0.000000000E+00 /
HISTORY AIPS HEADER2 CCFLUX = 1.841976166E+01 /AIPS Catalog Header Keyword
HISTORY AIPS HEADER2 CCTOTAL = 1.841976166E+01 /AIPS Catalog Header Keyword
HISTORY AIPS HEADER2 PARANGLE = -6.058295727E+00 /AIPS Catalog Header Keyword
HISTORY AIPS HEADER2 ZENANGLE = 6.258630753E+01 /AIPS Catalog Header Keyword
HISTORY FILLM / Image created by user 761 at 13-JUL-2007 11:50:14
HISTORY FILLM OUTNAME='20030219 ' OUTCLASS='CH 0 '
HISTORY FILLM OUTSEQ= 1 OUTDISK= 1
HISTORY FILLM NFILE= 0 INFILE='PWD:AM761_A030219.xp'
HISTORY FILLM BAND = 'X', QUAL = 0, CALC = ' '
HISTORY FILLM VLAMODE =' '
HISTORY FILLM / Control program ID =
HISTORY FILLM / VLA conf. = D
HISTORY FILLM / correlator mode = 2AD
HISTORY FILLM / AP options = H
HISTORY FILLM /TIMERANG = beginning to 999/00:00:00.00
HISTORY FILLM TIMERANG = 0.000000E+00 9.990000E+02 / days
HISTORY FILLM BCHAN = 1 ECHAN = 1 / Spectral channels
HISTORY FILLM CPARM(1) = 0.000 / Integration (sec)
HISTORY FILLM CPARM(3) = 3. / Max. IF stat. to pass
HISTORY FILLM CPARM(4) = 0. / .lt. 0 => no shadow flag
HISTORY FILLM CPARM(6) = 0. / Subarray
HISTORY FILLM CPARM(7) = 0.000 / FQ entry tolerance
HISTORY FILLM CPARM(8) = 5.00 / CL table time increment
HISTORY FILLM CPARM(9) = 0.00 / TY table time increment
HISTORY FILLM Opacity correction in CL table weighted average of weather
HISTORY FILLM and season. weight for weather = 0.50
HISTORY FILLM Gain curve correction in CL table read from file:
HISTORY FILLM standard system VLA antenna gains file
HISTORY FILLM with variation as function of antenna and band
HISTORY FILLM / Telescope = VLA Program = AM761
HISTORY FILLM / Weighted with nominal sensitivities
HISTORY FILLM / Data compressed, weighting info reduced
HISTORY FILLM RELEASE = '31DEC07'
HISTORY QUACK RELEASE ='31DEC07 ' /********* Start 13-JUL-2007
HISTORY QUACK OPCODE ='BEG '
HISTORY QUACK SOURCES = 'NRAO530 ','3C286 '
HISTORY QUACK /TIMERANG = beginning to end
HISTORY QUACK ANTENNAS = 0,
HISTORY QUACK SUBARRAY = 0
HISTORY QUACK Freq. ID = -1
HISTORY QUACK FGVER = 1 / FG table
HISTORY QUACK REASON = ' ' / Reason for flagging
HISTORY QUACK APARM(2) = 0.16670 / Bad data at start of scan
HISTORY QUACK Flagged 1.25 min. of data in 5 scans
HISTORY SETJY release ='31DEC07 ' /********* Start 13-JUL-2007 12:56:45
HISTORY SETJY / Flux calculated using known spectrum
HISTORY SETJY BIF = 1 EIF = 1 /Range of IFs
HISTORY SETJY '3C286 ' IF = 1 FLUX = 4.9601 (Jy calcd)
HISTORY SETJY / Using (1999.2) VLA or Reynolds (1934-638) coefficients
HISTORY CALIB RELEASE ='31DEC07 ' /******* Start 13-JUL-2007 12:57:27
HISTORY CALIB N SOURCES= 2 /Following Sources included:
HISTORY CALIB CALSOUR = 'NRAO530 ','3C286 '
HISTORY CALIB QUAL = -1 CALCODE =
HISTORY CALIB FLAGVER = 1 /Flagging table used
HISTORY CALIB /TIMERANG = beginning to end
HISTORY CALIB SOLINT = 144.00 /Soln. inter. (min)
HISTORY CALIB SOLSUB = 1 /Soln. subinterval
HISTORY CALIB SOLMIN = 1 /Minimum soln. int. (min)
HISTORY CALIB SUBARRAY = 0 REFANT = 0 /Reference Ant.
HISTORY CALIB APARM(1) = 6 /Min. no antennas
HISTORY CALIB APARM(3) = -1 />0 => avg. RR,LL
HISTORY CALIB APARM(7) = 5.0 /SNR cutoff
HISTORY CALIB SOLTYPE =' '/Solution type
HISTORY CALIB SOLMODE =' '/Solution mode
HISTORY CALIB WEIGHTIT = 0 / fit wts = wt**1.00
HISTORY CALIB CPARM(2) = -1 /1 => Normalize gain
HISTORY CALIB CPARM(7) = 2.500 /limit closure displays
HISTORY CALIB SNVER = 1 /Output SN table version
HISTORY CALIB UVRANGE = 0.000E+00, 1.000E+15 /Min, Max Baseline
HISTORY CALIB ANTENNAS = 0 /All antennas selected
HISTORY CALIB ANTWT = 1.0 /Weight same for all Ant
HISTORY CALIB /Found 250 good solutions
HISTORY CALIB /Failed on 6 solutions
HISTORY GETJY RELEASE ='31DEC07 ' /********* Start 13-JUL-2007 12:58:08
HISTORY GETJY INNAME='20030219 ' INCLASS='CH 0 '
HISTORY GETJY INSEQ= 1 INDISK= 1
HISTORY GETJY /Sources included:
HISTORY GETJY SOURCES = 'NRAO530 ',' '
HISTORY GETJY SOUCODE =' ' /Source Cal code
HISTORY GETJY /Calibrators included:
HISTORY GETJY CALSOUR = '3C286 ',' '
HISTORY GETJY QUAL = 0 CALCODE =
HISTORY GETJY BIF = 1, EIF = 1 / IF range
HISTORY GETJY /TIMERANG = beginning to end
HISTORY GETJY SUBARRAY = 0
HISTORY GETJY ANTENNAS = 0 /All antennas selected
HISTORY GETJY SNVER = 0 /SN version, 0=> all
HISTORY CLCAL RELEASE ='31DEC07 ' /********* Start 13-JUL-2007 13:00:29
HISTORY CLCAL OPCODE ='CALI' / MERG, CALI or SMOO
HISTORY CLCAL / Sources included:
HISTORY CLCAL SOURCES = 'SGRB2 ','SGRB2 '
HISTORY CLCAL SOUCODE =' ' / Source Cal code
HISTORY CLCAL / Calibrators included:
HISTORY CLCAL CALSOUR = 'NRAO530 ',' '
HISTORY CLCAL QUAL = -1 CALCODE = ' '
HISTORY CLCAL /TIMERANG = beginning to end
HISTORY CLCAL SUBARRAY = 0
HISTORY CLCAL ANTENNAS = 0 / All antennas selected
HISTORY CLCAL GAINVER = 1, GAINUSE = 2 / CL table
HISTORY CLCAL INTERPOL = '2PT ' / Interpolation type
HISTORY CLCAL CUTOFF = 0.0 minutes / Interpolation limit
HISTORY CLCAL SNVER = 1 1 / SN table versions used
HISTORY CLCAL REFANT = 27 / Reference antenna used
HISTORY SPLIT RELEASE ='31DEC07 ' /********* Start 13-JUL-2007 13:02:44
HISTORY SPLIT INNAME='20030219 ' INCLASS='CH 0 '
HISTORY SPLIT INSEQ= 1 INDISK= 1
HISTORY SPLIT OUTNAME='SGRB2 ' OUTCLASS='CH0 '
HISTORY SPLIT OUTSEQ= 1 OUTDISK= 1
HISTORY SPLIT /TIMERANG = beginning to end
HISTORY SPLIT STOKES = ' ' / Stokes type
HISTORY SPLIT BIF = 1, EIF = 1/ IF range
HISTORY SPLIT BCHAN = 1, ECHAN = 1/ Chan range
HISTORY SPLIT SUBARRAY = 0
HISTORY SPLIT FLAGVER= 1 / Edited using FG table version #
HISTORY SPLIT / Output data in compressed format
HISTORY SPLIT GAINUSE = 2 / CL table
HISTORY SPLIT / Weights calibrated
HISTORY SPLIT / Previously flagged flagged by gain kept
HISTORY SPLIT / Partially 337 0 337
HISTORY SPLIT / Fully 0 0 66873
HISTORY CALIB RELEASE ='31DEC07 ' /********* Start 23-NOV-2007 14:00:37
HISTORY CALIB INNAME='SGRB2 ' INCLASS='CH0 '
HISTORY CALIB INSEQ= 1 INDISK= 1
HISTORY CALIB OUTNAME='FINSC-NA ' OUTCLASS='FINSC '
HISTORY CALIB OUTSEQ= 1 OUTDISK= 1
HISTORY CALIB /TIMERANG = beginning to end
HISTORY CALIB IN2NAME='FINSC-NA ' IN2CLASS='ICL001'
HISTORY CALIB IN2SEQ= 1 IN2DISK= 1
HISTORY CALIB INVER = 1 /CC file version no.
HISTORY CALIB NMAPS = 1 /Number of clean images used
HISTORY CALIB NCOMP( 1)= 78 /Number of clean comps.
HISTORY CALIB SOLINT = 0.50 /Soln. inter. (min)
HISTORY CALIB SOLSUB = 1 /Soln. subinterval
HISTORY CALIB SOLMIN = 1 /Minimum soln. int. (min)
HISTORY CALIB SUBARRAY = 0 REFANT = 0 /Reference Ant.
HISTORY CALIB APARM(1) = 6 /Min. no antennas
HISTORY CALIB APARM(3) = -1 />0 => avg. RR,LL
HISTORY CALIB APARM(7) = 5.0 /SNR cutoff
HISTORY CALIB SOLTYPE =' '/Solution type
HISTORY CALIB SOLMODE ='A&P '/Solution mode
HISTORY CALIB WEIGHTIT = 0 / fit wts = wt**1.00
HISTORY CALIB CPARM(2) = -1 /1 => Normalize gain
HISTORY CALIB CPARM(7) = 2.500 /limit closure displays
HISTORY CALIB SNVER = 6 /Output SN table version
HISTORY CALIB UVRANGE = 0.000E+00, 1.000E+15 /Min, Max Baseline
HISTORY CALIB ANTENNAS = 0 /All antennas selected
HISTORY CALIB ANTWT = 1.0 /Weight same for all Ant
HISTORY CALIB /SUMMARY: Previously flagged Flagged by gain Kept
HISTORY CALIB /Partially 337 0 337
HISTORY CALIB /Fully 0 0 66873
HISTORY CALIB /Found 4632 good solutions
HISTORY CALIB /Failed on 4 solutions
HISTORY IMAGR RELEASE ='31DEC07 ' /********* Start 23-NOV-2007 14:00:52
HISTORY IMAGR INNAME ='FINSC-NA'
HISTORY IMAGR INCLASS ='FINSC'
HISTORY IMAGR INSEQ = 1
HISTORY IMAGR SOURCES( 1) ='SGRB2'
HISTORY IMAGR QUAL = -1
HISTORY IMAGR SELBAND =-1.00000E+00
HISTORY IMAGR SELFREQ =-1.00000E+00
HISTORY IMAGR FREQID = -1
HISTORY IMAGR DOCALIB =-1.00000E+00
HISTORY IMAGR GAINUSE = 2
HISTORY IMAGR DOPOL = -1
HISTORY IMAGR BLVER = -1
HISTORY IMAGR DOBAND = -1
HISTORY IMAGR BPVER = -1
HISTORY IMAGR STOKES ='I'
HISTORY IMAGR BCHAN = 1
HISTORY IMAGR ECHAN = 1
HISTORY IMAGR NCHAV = 1
HISTORY IMAGR CHINC = 1
HISTORY IMAGR BIF = 1
HISTORY IMAGR EIF = 1
HISTORY IMAGR OUTNAME ='FINSC-NA'
HISTORY IMAGR CELLSIZE( 1) = 1.00000E+00
HISTORY IMAGR CELLSIZE( 2) = 1.00000E+00
HISTORY IMAGR NFIELD = 1
HISTORY IMAGR UVWTFN ='NA'
HISTORY IMAGR UVBXFN = 1
HISTORY IMAGR XTYPE = 5
HISTORY IMAGR YTYPE = 5
HISTORY IMAGR NGAUSS = 1
HISTORY IMAGR FQTOL =-1.00000E+00
HISTORY IMAGR ROBUST = 0.000 / Weighting robustness parm
HISTORY IMAGR NITER = 500
HISTORY IMAGR GAIN = 3.00000E-01
HISTORY IMAGR MINPATCH = 51
HISTORY IMAGR IMSIZE(*, 1) = 512 , 512
HISTORY IMAGR FLDSIZE(*, 1) = 502 , 502
HISTORY IMAGR RASHIFT( 1) = 0.00000E+00
HISTORY IMAGR DECSHIFT( 1) = 0.00000E+00
HISTORY IMAGR NBOXES( 1) = 1
HISTORY IMAGR WIN(*, 1, 1) = 6, 6, 507, 507
HISTORY IMAGR TFLUX = 1.84198E+01 / Total cleaned flux
HISTORY IMAGR NCOMP( 1) = 500
HISTORY IMAGR CFLUX( 1) = 1.84198E+01 / Cleaned flux in field
HISTORY IMAGR RESMAX( 1) = 2.50743E-02 / Peak residual in field windows
HISTORY CNTR VERSION= 1 / plot file created 23-NOV-2007 14:02:01
HISTORY CNTR VERSION= 2 / plot file created 23-NOV-2007 14:02:12
HISTORY CNTR VERSION= 3 / plot file created 23-NOV-2007 14:42:34
HISTORY CNTR VERSION= 4 / plot file created 23-NOV-2007 15:09:11
HISTORY CNTR VERSION= 5 / plot file created 23-NOV-2007 15:09:35
HISTORY CNTR VERSION= 6 / plot file created 23-NOV-2007 15:13:52
HISTORY CNTR VERSION= 7 / plot file created 23-NOV-2007 15:14:19
HISTORY CNTR VERSION= 8 / plot file created 23-NOV-2007 15:15:00
HISTORY CNTR VERSION= 9 / plot file created 23-NOV-2007 15:15:33
HISTORY CNTR VERSION= 10 / plot file created 23-NOV-2007 15:15:51
HISTORY CNTR VERSION= 11 / plot file created 23-NOV-2007 15:16:16
HISTORY CNTR VERSION= 12 / plot file created 23-NOV-2007 15:17:07
HISTORY CNTR VERSION= 13 / plot file created 27-NOV-2007 13:46:24
HISTORY CNTR VERSION= 14 / plot file created 27-NOV-2007 13:46:46
HISTORY PBCOR RELEASE ='31DEC07 ' /********* Start 27-NOV-2007 16:09:23
HISTORY PBCOR INNAME='FINSC-NA ' INCLASS='ICL001'
HISTORY PBCOR INSEQ= 0 INDISK= 1
HISTORY PBCOR OUTNAME='FINSC-NA ' OUTCLASS='PBCOR '
HISTORY PBCOR OUTSEQ= 0 OUTDISK= 1
HISTORY PBCOR BLC= 1, 1, 1, 1, 1, 1, 1 TRC= 512, 512, 1, 1, 1, 1, 1
HISTORY PBCOR PRA= 17 47 20.000 PDec= -28 22 51.00
HISTORY PBCOR Beamcut= 0.02300 /Clip outside this beam value
HISTORY PBCOR / Beam = 1.000000E+00 + / Beam model
HISTORY PBCOR / -1.306000E+00 * X +
HISTORY PBCOR / 6.253000E+00 * X*X +
HISTORY PBCOR / -1.100000E+00 * X*X*X +
HISTORY PBCOR / 0.000000E+00 * X*X*X*X
HISTORY PBCOR / 0.000000E+00 * X*X*X*X*X
HISTORY PBCOR / Where X = [Angle(arcmin) * f(GHz)]**2
HISTORY CNTR VERSION= 1 / plot file created 27-NOV-2007 16:09:33
ORIGIN = 'AIPSpc20046 NBRIPM 31DEC08' /
DATE = '2008-01-28' / File written on Greenwich yyyy-mm-dd
HISTORY AIPS IMNAME='FINSC-NA ' IMCLASS='PBCOR ' IMSEQ= 1 /
HISTORY AIPS USERNO= 761 /
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
HISTORY AIPS CLEAN BMAJ= 5.7242E-03 BMIN= 1.9539E-03 BPA= -6.10
HISTORY AIPS CLEAN NITER= 500 PRODUCT=1 / NORMAL
HISTORY AIPS IMAGE ITYPE=1 XPOFF= 0.00000000E+00 YPOFF= 0.00000000E+00
END
END