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psrheader.fits
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psrheader.fits
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SIMPLE = T / file does conform to FITS standard
BITPIX = 8 / number of bits per data pixel
NAXIS = 0 / number of data axes
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and
COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365.
COMMENT Contact the NASA Science Office of Standards and Technology for the
COMMENT FITS Definition document #100 and other FITS information.
COMMENT
HDRVER = '4.3 ' / Header version
FITSTYPE= 'PSRFITS ' / FITS definition for pulsar data files
DATE = ' ' / File creation date (YYYY-MM-DDThh:mm:ss UTC)
OBSERVER= ' ' / Observer name(s)
PROJID = ' ' / Project name
TELESCOP= ' ' / Telescope name
ANT_X = * / [m] Antenna ITRF X-coordinate (D)
ANT_Y = * / [m] Antenna ITRF Y-coordinate (D)
ANT_Z = * / [m] Antenna ITRF Z-coordinate (D)
FRONTEND= ' ' / Receiver ID
IBEAM = * / Beam number for multibeam systems (1=ctr beam)
NRCVR = * / Number of receiver polarisation channels
FD_POLN = ' ' / LIN or CIRC
FD_HAND = * / +/- 1. +1 is LIN:A=X,B=Y, CIRC:A=L,B=R (I)
FD_SANG = * / [deg] FA of E vect for equal sig in A&B (E)
FD_XYPH = * / [deg] Phase of A^* B for injected cal (E)
BACKEND = ' ' / Backend ID
BECONFIG= ' ' / Backend configuration file name
BE_PHASE= * / 0/+1/-1 BE cross-phase:0 unknown,+/-1 std/rev
BE_DCC = * / 0/1 BE downconversion conjugation corrected
BE_DELAY= * / [s] Backend propn delay from digitiser input
TCYCLE = * / [s] On-line cycle time (D)
OBS_MODE= ' ' / (PSR, CAL, SEARCH)
DATE-OBS= ' ' / Date of observation (YYYY-MM-DDThh:mm:ss UTC)
OBSFREQ = * / [MHz] Centre frequency for observation
OBSBW = * / [MHz] Bandwidth for observation
OBSNCHAN= * / Number of frequency channels (original)
CHAN_DM = * / [cm-3 pc] DM used for on-line dedispersion
PNT_ID = ' ' / Name or ID for pointing ctr (multibeam feeds)
SRC_NAME= ' ' / Source or scan ID
COORD_MD= ' ' / Coordinate mode (J2000, GAL, ECLIP, etc.)
EQUINOX = ' ' / Equinox of coords (e.g. 2000.0)
RA = ' ' / Right ascension (hh:mm:ss.ssss)
DEC = ' ' / Declination (-dd:mm:ss.sss)
BMAJ = * / [deg] Beam major axis length
BMIN = * / [deg] Beam minor axis length
BPA = * / [deg] Beam position angle
STT_CRD1= ' ' / Start coord 1 (hh:mm:ss.sss or ddd.ddd)
STT_CRD2= ' ' / Start coord 2 (-dd:mm:ss.sss or -dd.ddd)
TRK_MODE= ' ' / Track mode (TRACK, SCANGC, SCANLAT)
STP_CRD1= ' ' / Stop coord 1 (hh:mm:ss.sss or ddd.ddd)
STP_CRD2= ' ' / Stop coord 2 (-dd:mm:ss.sss or -dd.ddd)
SCANLEN = * / [s] Requested scan length (E)
FD_MODE = ' ' / Feed track mode - FA, CPA, SPA, TPA
FA_REQ = * / [deg] Feed/Posn angle requested (E)
CAL_MODE= ' ' / Cal mode (OFF, SYNC, EXT1, EXT2)
CAL_FREQ= * / [Hz] Cal modulation frequency (E)
CAL_DCYC= * / Cal duty cycle (E)
CAL_PHS = * / Cal phase (wrt start time) (E)
STT_IMJD= * / Start MJD (UTC days) (J - long integer)
STT_SMJD= * / [s] Start time (sec past UTC 00h) (J)
STT_OFFS= * / [s] Start time offset (D)
STT_LST = * / [s] Start LST (D)
END
#
###############################################################################
#
# History Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Processing history *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 23 / number of fields per row
#
EXTNAME = HISTORY / name of this binary table extension
#
TTYPE# = DATE_PRO / Processing date and time (UTC)
TFORM# = 24A / 24-char string
TTYPE# = PROC_CMD / Processing program and command
TFORM# = 80A / 80_char string
TTYPE# = SCALE / Units (FluxDen/RefFlux/Jansky)
TFORM# = 8A / 8-char string
TTYPE# = POL_TYPE / Polarisation identifier
TFORM# = 8A / 8-char string
TTYPE# = NSUB / Number of Sub-Integrations
TFORM# = 1I / Integer
TTYPE# = NPOL / Number of polarisations
TFORM# = 1I / Integer
TTYPE# = NBIN / Nr of bins per product (0 for SEARCH mode)
TFORM# = 1I / Integer
TTYPE# = NBIN_PRD / Nr of bins per period
TFORM# = 1I / Integer
TTYPE# = TBIN / Time per bin or sample
TUNIT# = s / units of field
TFORM# = 1D / Double
TTYPE# = CTR_FREQ / Band centre frequency (weighted)
TUNIT# = MHz / units of field
TFORM# = 1D / Double
TTYPE# = NCHAN / Number of frequency channels
TFORM# = 1I / Integer
TTYPE# = CHAN_BW / Channel bandwidth
TFORM# = 1D / Double
TUNIT# = MHz / units of field
TTYPE# = DM / DM used for dedispersion
TFORM# = 1D / Double
TUNIT# = CM-3 PC / units of field
TTYPE# = RM / RM used for RM correction
TFORM# = 1D / Double
TUNIT# = RAD M-2 / units of field
TTYPE# = PR_CORR / Projection of receptors onto sky corrected
TFORM# = 1I / Integer flag
TTYPE# = FD_CORR / Feed basis correction applied
TFORM# = 1I / Integer flag
TTYPE# = BE_CORR / Backend correction applied
TFORM# = 1I / Integer flag
TTYPE# = RM_CORR / RM correction applied
TFORM# = 1I / Integer flag
TTYPE# = DEDISP / Data dedispersed
TFORM# = 1I / Integer flag
TTYPE# = DDS_MTHD / Dedispersion method
TFORM# = 32A / 32-char string
TTYPE# = SC_MTHD / Scattered power correction method
TFORM# = 32A / 32-char string
TTYPE# = CAL_MTHD / Calibration method
TFORM# = 32A / 32-char string
TTYPE# = CAL_FILE / Name of gain calibration file
TFORM# = 32A / 32-char string
TTYPE# = RFI_MTHD / RFI excision method
TFORM# = 32A / 32-char string
TTYPE# = IFR_MTHD / Ionospheric Faraday rotation correction method
TFORM# = 32A / 32-char string
END
#
###############################################################################
#
# Coherent Dedispersion Parameters Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Coherent Dedispersion Parameters *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table (NCHAN)
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 3 / number of fields per row
#
NFFT = * / Size of forward FFT
EXTNAME = COHDDISP / name of this binary table extension
#
TTYPE# = NOVERLAP / Number of overlap points for each sub-band
TFORM# = 1I / Integer
TTYPE# = NCHIRP / Number of points in chirp function
TFORM# = 1I / Integer
TTYPE# = ACBANDPASS / Bandpass for autocorrelations
TUNIT# = Jy / Bandpass amplitude units
TFORM# = E / NCHIRP floats
END
#
###############################################################################
#
# Ephemeris Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Pulsar ephemeris *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 1 / Number of fields per row
#
EXTNAME = PSRPARAM / Name of this binary table extension
#
TTYPE# = PARAM / Text file stored row by row
TFORM# = 128A / Allow 128 char per row
END
#
###############################################################################
#
# TEMPO1 Polyco History Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Polyco history *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 13 / Number of fields per row
#
EXTNAME = POLYCO / name of this binary table extension
#
TTYPE# = DATE_PRO / Processing date and time (UTC)
TFORM# = 24A / 24-char string
TTYPE# = POLYVER / Polyco version ID
TFORM# = 16A / 16-char string
TTYPE# = NSPAN / Span of polyco in min
TFORM# = 1I / Integer
TTYPE# = NCOEF / Nr of coefficients (<=15)
TFORM# = 1I / Integer
TTYPE# = NPBLK / Nr of blocks (rows) for this polyco
TFORM# = 1I / Integer
TTYPE# = NSITE / Observatory code
TFORM# = 8A / 8-char string
TTYPE# = REF_FREQ / Reference frequency for phase
TFORM# = 1D / Double
TUNIT# = MHz / Units of field
TTYPE# = PRED_PHS / Predicted pulse phase at obs start
TFORM# = 1D / Double
TTYPE# = REF_MJD / Reference MJD
TFORM# = 1D / Double
TTYPE# = REF_PHS / Reference phase
TFORM# = 1D / Double
TTYPE# = REF_F0 / Zero-order pulsar frequency
TUNIT# = Hz / Units of field
TFORM# = 1D / Double
TTYPE# = LGFITERR / Log_10 of polynomial fit rms error in periods
TFORM# = 1D / Double
TTYPE# = COEFF / Polyco coefficients
TFORM# = 15D / NCOEF doubles
END
#
###############################################################################
#
# TEMPO2 Predictor Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Tempo2 Predictor *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 1 / Number of fields per row
#
EXTNAME = T2PREDICT / Name of this binary table extension
#
TTYPE# = PREDICT / Text file stored row by row
TFORM# = 128A / Allow 128 char per row
END
#
###############################################################################
#
# Flux Calibration Data Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Flux Calibration Data *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 6 / Number of fields per row
#
EXTNAME = FLUX_CAL / name of this binary table extension
CAL_MTHD= / Flux cal method
SCALFILE= / Cal file(s) used to derive flux-cal data
NCHAN = * / Nr of frequency channels (I)
NRCVR = * / Number of polarisation channels (I)
EPOCH = / [MJD] Epoch of calibration obs
#
TTYPE# = DAT_FREQ / Centre frequency for each channel
TFORM# = E / NCHAN floats
TUNIT# = MHz / Units of field
TTYPE# = DAT_WTS / Weights for each channel
TFORM# = E / NCHAN floats
TTYPE# = S_SYS / System equiv. flux density for each rcvr chan.
TDIM# = (*,*) / Dimensions (NCHAN,NRCVR)
TFORM# = E / NCHAN*NRCVR floats
TUNIT# = Jy
TTYPE# = S_SYSERR / Est. error of system equiv. flux density
TDIM# = (*,*) / Dimensions (NCHAN,NRCVR)
TFORM# = E / NCHAN*NRCVR floats
TUNIT# = Jy
TTYPE# = S_CAL / Calibrator flux density for each rcvr channel
TDIM# = (*,*) / Dimensions (NCHAN,NRCVR)
TFORM# = E / NCHAN*NRCVR floats
TUNIT# = Jy
TTYPE# = S_CALERR / Estimated error of calibrator flux density
TDIM# = (*,*) / Dimensions (NCHAN,NRCVR)
TFORM# = E / NCHAN*NRCVR floats
TUNIT# = Jy
END
#
###############################################################################
#
# Artificial Calibrator Stokes Parameters Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Artificial Calibrator Stokes Data *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 3 / Number of fields per row
#
EXTNAME = CAL_POLN / name of this binary table extension
NCHAN = * / Nr of channels in flux cal file
#
TTYPE# = DAT_WTS / Weights for each channel
TFORM# = E / NCHAN floats
TTYPE# = DATA / Stokes (Q,U,V) of calibrator rel. to Cal I
TDIM# = (*,*) / Dimensions (3,NCHAN)
TFORM# = E / 3*NCHAN floats
TTYPE# = DATAERR / Estimated error of Stokes (Q,U,V)
TDIM# = (*,*) / Dimensions (3,NCHAN)
TFORM# = E / 3*NCHAN floats
END
#
###############################################################################
#
# Feed Cross-Coupling Parameters Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Feed Cross-Coupling parameters *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 3 / Number of fields per row
#
EXTNAME = FEEDPAR / Name of this binary table extension
CAL_MTHD= ' ' / Cross-coupling method
NCPAR = * / Number of coupling parameters
NCOVAR = * / Number of parameter covariances
NCHAN = * / Nr of channels in Feed coupling data
EPOCH = ' ' / [MJD] Epoch of calibration obs
#
TTYPE# = DAT_FREQ / [MHz] Centre frequency for each channel
TFORM# = E / NCHAN floats
TUNIT# = MHz / Units of field
TTYPE# = DAT_WTS / Weights for each channel
TFORM# = E / NCHAN floats
TTYPE# = DATA / Cross-coupling data
TDIM# = (*,*) / Dimensions (NCPAR,NCHAN)
TFORM# = E / NCPAR*NCHAN floats
TTYPE# = DATAERR / Estimated error of cross-coupling data
TDIM# = (*,*) / Dimensions (NCPAR,NCHAN)
TFORM# = E / NCPAR*NCHAN floats
TTYPE# = COVAR / Formal covariances of coupling data
TDIM# = (*,*) / Dimensions (NCOVAR,NCHAN)
TFORM# = E / NCOVAR*NCHAN floats
TTYPE# = CHISQ / Total chi-squared (objective merit function)
TFORM# = E / NCHAN floats
TTYPE# = NFREE / Number of degrees of freedom
TFORM# = J / NCHAN 32-bit integers
END
#
###############################################################################
#
# Subintegration data Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Subintegration data *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / Number of rows in table (NSUBINT)
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 18 / Number of fields per row
#
INT_TYPE= ' ' / Time axis (TIME, BINPHSPERI, BINLNGASC, etc)
INT_UNIT= ' ' / Unit of time axis (SEC, PHS (0-1), DEG)
SCALE = ' ' / Intensity units (FluxDen/RefFlux/Jansky)
POL_TYPE= ' ' / Polarisation identifier (e.g., AABBCRCI, AA+BB)
NPOL = * / Nr of polarisations
TBIN = * / [s] Time per bin or sample
NBIN = * / Nr of bins (PSR/CAL mode; else 1)
NBIN_PRD= * / Nr of bins/pulse period (for gated data)
PHS_OFFS= * / Phase offset of bin 0 for gated data
NBITS = * / Nr of bits/datum (SEARCH mode 'X' data, else 1)
ZERO_OFF= * / Zero offset for SEARCH-mode 'X' data
NSUBOFFS= * / Subint offset (Contiguous SEARCH-mode files)
NCHAN = * / Number of channels/sub-bands in this file
CHAN_BW = * / [MHz] Channel/sub-band width
DM = * / [cm-3 pc] DM for post-detection dedisperion
RM = * / [rad m-2] RM for post-detection deFaraday
NCHNOFFS= * / Channel/sub-band offset for split files
NSBLK = * / Samples/row (SEARCH mode, else 1)
#
EXTNAME = SUBINT / name of this binary table extension
#
TTYPE# = INDEXVAL / Optionally used if INT_TYPE != TIME
TFORM# = 1D / Double
TTYPE# = TSUBINT / Length of subintegration
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = OFFS_SUB / Offset from Start of subint centre
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = LST_SUB / LST at subint centre
TFORM# = 1D / Double
TUNIT# = s / Units of field
TTYPE# = RA_SUB / RA (J2000) at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = DEC_SUB / Dec (J2000) at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = GLON_SUB / [deg] Gal longitude at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = GLAT_SUB / [deg] Gal latitude at subint centre
TFORM# = 1D / Double
TUNIT# = deg / Units of field
TTYPE# = FD_ANG / [deg] Feed angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = POS_ANG / [deg] Position angle of feed at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = PAR_ANG / [deg] Parallactic angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = TEL_AZ / [deg] Telescope azimuth at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = TEL_ZEN / [deg] Telescope zenith angle at subint centre
TFORM# = 1E / Float
TUNIT# = deg / Units of field
TTYPE# = DAT_FREQ / [MHz] Centre frequency for each channel
TFORM# = E / NCHAN floats
TUNIT# = MHz / Units of field
TTYPE# = DAT_WTS / Weights for each channel
TFORM# = E / NCHAN floats
TTYPE# = DAT_OFFS / Data offset for each channel
TFORM# = E / NCHAN*NPOL floats
TTYPE# = DAT_SCL / Data scale factor for each channel
TFORM# = E / NCHAN*NPOL floats
TTYPE# = DATA / Subint data table
TDIM# = (*,*,*) / Dimensions (NBIN,NCHAN,NPOL/NCHAN,NPOL,NSBLK)
TFORM# = I / I (Fold), X (1-bit) or B (2-8 bit) Search
TUNIT# = Jy / Units of subint data
END
#
###############################################################################
#
# Digitiser Statistics Binary Table Extension
#
###############################################################################
#
XTENSION= BINTABLE / ***** Digitiser statistics *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / Width of table in bytes
NAXIS2 = * / Number of rows in table (NSUBINT)
PCOUNT = 0 / Size of special data area
GCOUNT = 1 / One data group (required keyword)
TFIELDS = 1 / Number of fields per row
#
DIG_MODE= ' ' / Digitiser mode
NDIGR = * / Number of digitised channels (I)
NPAR = * / Number of digitiser parameters
NCYCSUB = * / Number of correlator cycles per subint
DIGLEV = ' ' / Digitiser level-setting mode (AUTO, FIX)
EXTNAME = DIG_STAT / Name of this binary table extension
#
TTYPE# = ATTEN / Attenuator settings
TFORM# = E / NDIGR floats
TUNIT# = db / Units of field
TTYPE# = DATA / Digitiser statistics
TDIM# = (*,*,*) / Data table dimensions (NPAR,NDIGR,NCYCSUB)
TFORM# = E / NPAR*NDIGR*NCYCSUB floats
END
#
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#
# Digitiser Counts Binary Table Extension
#
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#
XTENSION= BINTABLE / ***** Digitiser counts *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / Width of table in bytes
NAXIS2 = * / Number of rows in table
PCOUNT = 0 / Size of special data area
GCOUNT = 1 / One data group (required keyword)
TFIELDS = 3 / Number of fields per row
#
DIG_MODE= ' ' / Digitiser mode
DYN_LEVT= * / Timescale for dynamic leveling
NDIGR = * / Number of digitised channels (I)
NLEV = * / Number of digitiser levels
NPTHIST = * / Number of points in histogram (I)
DIGLEV = ' ' / Digitiser level-setting mode (AUTO, FIX)
EXTNAME = DIG_CNTS / Name of this binary table extension
#
TTYPE# = DAT_OFFS / Data offset for each histogram
TFORM# = E / NDIGR floats
TTYPE# = DAT_SCL / Data scale factor for each histogram
TFORM# = E / NDIGR floats
TTYPE# = DATA / Digitiser count data
TDIM# = (*,*) / Data table dimensions (NPTHIST,NDIGR)
TFORM# = I / NPTHIST*NDIGR integers
END
#
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# Original Bandpass Binary Table Extension
#
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#
XTENSION= BINTABLE / ***** Original bandpasses *****
BITPIX = 8 / N/A
NAXIS = 2 / 2-dimensional binary table
NAXIS1 = * / width of table in bytes
NAXIS2 = * / number of rows in table
PCOUNT = 0 / size of special data area
GCOUNT = 1 / one data group (required keyword)
TFIELDS = 3 / number of fields per row
#
NCH_ORIG= * / Number of channels in original bandpass
BP_NPOL = * / Number of polarizations in bandpass
EXTNAME = BANDPASS / name of this binary table extension
#
TTYPE# = DAT_OFFS / Data offset for each bandpass
TFORM# = E / BP_NPOL floats
TTYPE# = DAT_SCL / Data scale factor: Val=Data*DAT_SCL + DAT_OFFS
TFORM# = E / BP_NPOL floats
TTYPE# = DATA / Bandpass for autocorrelations
TDIM# = (*,*) / Data table dimensions = (NCH_ORIG,BP_NPOL)
TUNIT# = Jy / Bandpass amplitude units
TFORM# = I / NCH_ORIG*BP_NPOL integers
END