--- header unit 0: primary ---
SIMPLE = T
BITPIX = -32
NAXIS = 4
NAXIS1 = 1200
NAXIS2 = 1560
NAXIS3 = 1
NAXIS4 = 1
EXTEND = T / Tables following main image
BLOCKED = T / Tape may be blocked
OBJECT = '12570+49'
TELESCOP = 'VLA'
INSTRUME = 'VLA'
OBSERVER = 'AB628'
DATE-OBS = '17/04/97'
DATE-MAP = '20/02/99'
BSCALE = 1.00000000000E+00 / REAL = TAPE * BSCALE + BZERO
BZERO = 0.00000000000E+00
BUNIT = 'JY/BEAM'
BMAJ = 1.5000E-03 / Beam major axis (deg)
BMIN = 1.5000E-03 / Beam minor axis (deg)
BPA = 0.00 / Beam position angle (deg)
FIELDNAM = '12570+49440' / Field name
IMCLASS = 'COADD' / Image class
ROOTNAME = 'FBSUM12570P49440' / ST-DADS data set name
EPOCH = 2.000000000E+03 / EPOCH OF RA DEC
VELREF = 3 / >256 RADIO, 1 LSR 2 HEL 3 OBS
ALTRVAL = 1.12500000000E+05 / ALTENATE FREQ/VEL REF VALUE
ALTRPIX = 1.000000000E+00 / ALTENATE FREQ/VEL REF PIXEL
OBSRA = 1.94249722258E+02 / ANTENNA POINTING RA
OBSDEC = 4.97333333333E+01 / ANTENNA POINTING DEC
XSHIFT = -2.811230370E-04 / NET SHIFT OF PHASE CENTER INX
YSHIFT = 2.878109226E-04 / NET SHIFT OF PHASE CENTER INY
DATAMAX = 9.491235763E-02 / MAX PIXEL VALUE
DATAMIN = -7.401011535E-04 / MIN PIXEL VALUE
CTYPE1 = 'RA---SIN'
CRVAL1 = 1.94249722258E+02
CDELT1 = -5.000000237E-04
CRPIX1 = 5.510000000E+02
CROTA1 = 0.000000000E+00
CTYPE2 = 'DEC--SIN'
CRVAL2 = 4.97333333333E+01
CDELT2 = 5.000000237E-04
CRPIX2 = 7.750000000E+02
CROTA2 = 0.000000000E+00
CTYPE3 = 'FREQ'
CRVAL3 = 1.40000000000E+09
CDELT3 = 2.187500000E+07
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 FCPRT RELEASE ='15JUL95 ' /********* Start 20-FEB-1999 09:22:34
HISTORY FIRST VLA image: COPYRIGHT 1999 Regents of the University of California
HISTORY FIRST VLA image: COPYRIGHT 1996 Regents of the University of Californi
HISTORY FIRST VLA image: COPYRIGHT 1996 Regents of the University of Californi
HISTORY The FIRST VLA Survey: Copyright 1996 University of California
HISTORY Permission is granted for publication and reproduction of this
HISTORY material for scholarly, educational, and private non-commercial
HISTORY use. Inquiries for potential commercial uses should be
HISTORY addressed to:
HISTORY Robert Becker
HISTORY Physics Dept
HISTORY University of California
HISTORY Davis, CA 95616
HISTORY -----------------------------------------------------------
HISTORY The VLA FIRST Survey
HISTORY R.H. Becker R.L. White D.J. Helfand
HISTORY UC Davis and IGPP, LLNL STScI Columbia University
HISTORY The FIRST survey (Faint Images of the Radio Sky at Twenty-cm) is a
HISTORY high angular resolution survey of the North Galactic Cap intended to
HISTORY match the 10,000 deg**2 survey area of the Sloan Digital Sky Survey
HISTORY (Gunn and Knapp 1992 PASP 43, 267). Observations are made in the
HISTORY VLA's B configuration operating at frequencies of 1365 and 1435 MHz in
HISTORY the bandwidth synthesis mode. The synthesized beam has a FWHM of 5.4".
HISTORY Each field is observed for 3 minutes, resulting in a typical image rms
HISTORY of <0.15 mJy/beam. The raw UV data from the observations are archived
HISTORY at the VLA and are available on the day they are taken without the
HISTORY standard proprietary period. The fully self-calibrated UV datasets
HISTORY for each pointing are also archived at the NRAO.
HISTORY Source positions derived from FIRST images have an error of 0.5" rms
HISTORY for the weakest discernible point sources (~0.75 mJy) and
HISTORY substantially smaller uncertainties for brighter sources. The source
HISTORY surface density is ~100 per square degree. The grid of images on the
HISTORY sky is sufficiently dense that considerable improvement in sensitivity
HISTORY can be obtained by coadding adjacent fields. These coadded images, of
HISTORY which this is an example, comprise one of the principal data products
HISTORY of the FIRST Survey. The maps are labelled as HHMMM+-DDMMM (with
HISTORY implied decimal points before the final M's) corresponding to the
HISTORY J2000 coordinates of the field center to the nearest 6"; e.g., the
HISTORY field centered at 07 42 00 +30 45 36 is labelled 07420+30456. The
HISTORY images are stored as binary FITS image files with appropriate
HISTORY extensions; the images have 1.8" x 1.8" pixels, and vary in size
HISTORY depending on declination. Each image has an associated NN table which
HISTORY lists all the possible fields which could contribute to the image and
HISTORY indicates which were available at the time this version of the image
HISTORY was created.
HISTORY Details of the survey design, pipeline processing algorithms, and
HISTORY catalog generation may be found in Becker et al. 1995; this paper,
HISTORY along with further information on FIRST, is retrievable via the FIRST
HISTORY WWW home-page: http://sundog.stsci.edu/ . Users interested in deriving
HISTORY quantitative information from the maps for scientific purposes are
HISTORY advised to read the FIRST paper first. Questions or comments on the
HISTORY FIRST survey should be addressed to Bob Becker at bob@igpp.llnl.gov or
HISTORY 925-423-0664.
ORIGIN = 'AIPSUN-REGISTERED!!!!!!! 15JUL95'
DATE = '22/02/99' / File written on dd/mm/yy
HISTORY AIPS IMNAME='12570+49440F' IMCLASS='COADD ' IMSEQ= 2 /
HISTORY AIPS USERNO= 3000 /
HISTORY AIPS CLEAN BMAJ= 1.5000E-03 BMIN= 1.5000E-03 BPA= 0.00
HISTORY AIPS CLEAN NITER= 26 PRODUCT=1 / NORMAL
--- header unit 1: binary table ---
XTENSION = 'BINTABLE' / Extension type
BITPIX = 8 / Binary data
NAXIS = 2 / Table is a matrix
NAXIS1 = 33 / Width of table in bytes
NAXIS2 = 12 / Number of entries in table
PCOUNT = 0 / Random parameter count
GCOUNT = 1 / Group count
TFIELDS = 5 / Number of fields in each row
EXTNAME = 'AIPS NN' / AIPS table file
EXTVER = 1 / Version number of table
TFORM1 = '12A' / FORTRAN format of field 1
TTYPE1 = 'FLDNAME' / Type (heading) of field 1
TUNIT1 = '' / Physical units of field 1
TFORM2 = '1A' / FORTRAN format of field 2
TTYPE2 = 'STATUS' / Type (heading) of field 2
TUNIT2 = '' / Physical units of field 2
TFORM3 = '1D' / FORTRAN format of field 3
TTYPE3 = 'RA' / Type (heading) of field 3
TUNIT3 = 'DEGREES' / Physical units of field 3
TFORM4 = '1D' / FORTRAN format of field 4
TTYPE4 = 'DEC' / Type (heading) of field 4
TUNIT4 = 'DEGREES' / Physical units of field 4
TFORM5 = '1E' / FORTRAN format of field 5
TTYPE5 = 'DISTANCE' / Type (heading) of field 5
TUNIT5 = 'DEGREES' / Physical units of field 5