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 is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'XRT ' / Instrument name OBS_ID = '00927825000' / Observation ID TARG_ID = '927825 ' / Target ID SEG_NUM = '0 ' / Segment number TIMESYS = 'TT ' / Time system MJDREFI = 51910. / Reference MJD Integer part MJDREFF = 0.00074287037 / Reference MJD fractional TIMEUNIT= 's ' / Time unit for the time header keywords TIERRELA= 1.0E-08 / [s/s] Estimated relative clock rate error TIERABSO= 1. / [s] Estimated absolute clock offset error TSTART = 591905330.59456 / Start time DATE-OBS= '2019-10-04T18:08:50.6' / Start Date TSTOP = 591905460.38544 / Stop time DATE-END= '2019-10-04T18:11:00.4' / Stop Date CLOCKAPP= F / If clock correction are applied (F/T) ORIGIN = 'GSFC ' / Source of FITS file CREATOR = 'TDRSS2FITS V3.21' / Program that created this FITS file TLM2FITS= 'V3.21 ' / Telemetry converter version number DATE = '2019-10-04T18:10:54' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -23.6929 / UTCF at TSTART CHECKSUM= 'dFpKdCnHdCnHdCnH' / HDU checksum updated 2019-10-04T18:10:54 DATASUM = ' 0' / data unit checksum updated 2019-10-04T18:10:54 END XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 18 / width of table in bytes NAXIS2 = 100 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 3 / number of fields in each row TTYPE1 = 'TIME ' / label for field 1 TFORM1 = '1D ' / data format of field: 8-byte DOUBLE TUNIT1 = 's ' / physical unit of field TTYPE2 = 'RATE ' / label for field 2 TFORM2 = '1D ' / data format of field: 8-byte DOUBLE TUNIT2 = 'count/s ' / physical unit of field TTYPE3 = 'XRTMODE ' / label for field 3 TFORM3 = '1I ' / data format of field: 2-byte INTEGER EXTNAME = 'RATE ' / name of this binary table extension MESGNAME= 'XRT_LIGHTCURVE' / Name of the message COMMENT XRTMODE values COMMENT 1=null 2=Short Image 3=Long Image 4=Pile-Up Photodiode COMMENT 5=Low Rate Photodiode 6=Windowed Timing 7= Photon-Counting COMMENT 8=RAW data 9=Bias map 10=Stop TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'XRT ' / Instrument name OBS_ID = '00927825000' / Observation ID TARG_ID = '927825 ' / Target ID SEG_NUM = '0 ' / Segment number CREATOR = 'TDRSS2FITS V3.21' / Program that created this FITS file ORIGIN = 'GSFC ' / Source of FITS file TLM2FITS= 'V3.21 ' / Telemetry converter version number EQUINOX = 2000 / Equinox RADECSYS= 'FK5 ' / Coordinates system TIMESYS = 'TT ' / Time system MJDREFI = 51910. / Reference MJD Integer part MJDREFF = 0.00074287037 / Reference MJD fractional TIMEUNIT= 's ' / Time unit for the time header keywords TIERRELA= 1.0E-08 / [s/s] Estimated relative clock rate error TIERABSO= 1. / [s] Estimated absolute clock offset error CLOCKAPP= F / If clock correction are applied (F/T) TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock DATE = '2019-10-04T18:10:54' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 591905330.59456 / Start time DATE-OBS= '2019-10-04T18:08:50.6' / Start Date TSTOP = 591905460.38544 / Stop time DATE-END= '2019-10-04T18:11:00.4' / Stop Date UTCFINIT= -23.6929 / UTCF at TSTART TIMEPIXR= 0. / Bin time beginning=0.0 middle=0.5 end=1. HDUCLASS= 'OGIP ' / Format conforms to OGIP standards HDUCLAS1= 'LIGHTCURVE' / Time ordered data HDUCLAS2= 'TOTAL ' / Source + background HDUCLAS3= 'RATE ' / Data provided as rate NUMBINS = 100 / Number of valid bins in the lightcurve TRIGGER = 927825 / Trigger Number XRA_OBJ = 31.6937408447266 / [deg] XRT RA location GRB or Object XDEC_OBJ= -36.9496650695801 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 129.790879964828 / TSTOP - TSTART ONTIME = 127.51685333252 / Time on target LIVETIME= 127.51685333252 / Ontime multiplied by DEADC EXPOSURE= 127.51685333252 / Total exposure, with all known correction DEADC = 1. / dead time correction UTCCTIME= -23.6929 / [s] UTC Correction TIME UTCCSEC = -24 / UTC Correction Seconds UTCCSUBS= 15355 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 591905460.44486 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 591905460 / ccsds PacKeT SEConds PKTSUBS = 22243 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= 'Aai3CUf1AZf1AZf1' / HDU checksum updated 2019-10-04T18:10:54 DATASUM = '4096832917' / data unit checksum updated 2019-10-04T18:10:54 END ALAA@ZvAQ7@&{A,g@,aAb@F{Aqv@&{At@5A@ ܠA[@*:A 3@2@A@([ AC@;*A@/١@A 0H@ATA -w@  A!A@9JA!s.@{A"S@$A"۸@;*A#d\@:A#C@B@A$u@@A$D@*:A%)@?١@A&Y@:A&.@ ܠA' @5A't?@@A(2@<aA(@/١@A)C]%@ ܠA)T@2@A*T@,aA*F @;*A+e:@{A+i@;*A,w/@*:A,@7kPA-uO@$A.@  A.@5A/"^5@:A/e@6{A03@<aA0G@6{A1DK@  A1͍z@0ܠA2V0@PA2@ A3gv`@@A3@ ܠA4x@$A5_F@D#A5u@{A6@RdA6H,@{A7#[@ ܠA7@ ܠA851@8[ A8@> A9Fwp@*:A9@::A:W'@:A:`W@ A;i@4A; @3A2@= 1 A>@&{A?%x@:A? @> A@68@  A@ag@ ܠAAH@8[ AAЧ@2@ABYJM@1pAB|@LI ACj@/١@AC3@FAD{ @9JAEx@@dAE@:AFH? 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