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 = '01252695000' / Observation ID TARG_ID = '1252695 ' / Target ID SEG_NUM = '0 ' / Segment number TIMESYS = 'TT ' / time system MJDREFI = 51910 / MJD reference day 01 Jan 2001 00:00:00 MJDREFF = 0.00074287037 / MJD reference (fraction of day) 01 Jan 2001 00:TIMEUNIT= 's ' / Time unit for timing header keywords TIERRELA= 1.0E-08 / [s/s] Estimated relative clock rate error TIERABSO= 1. / [s] Estimated absolute clock offset error TSTART = 747253709.39456 / Start time DATE-OBS= '2024-09-05T18:25:58' TSTOP = 747253814.95434 / Stop time DATE-END= '2024-09-05T18:30:09' CLOCKAPP= F / If clock correction are applied (F/T) ORIGIN = 'GSFC ' / Source of FITS file CREATOR = 'TDRSS2FITS V3.22' / Program that created this FITS file TLM2FITS= 'V3.22 ' / Telemetry converter version number DATE = '2024-09-15T05:57:33' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -34.1214600000000 / [s] UTCF at TSTART CHECKSUM= 'Y5ffc3feZ3fea3fe' / HDU checksum updated 2024-09-15T06:12:47 DATASUM = ' 0' / data unit checksum updated 2024-09-15T05:57:33 OBJECT = 'Burst ' XOBS_ID = 01252695000 / Generating sequence PROCVER = '3.20.02 ' / Processing script version SOFTVER = 'Hea_21Mar2024_V6.33.1_Swift_Rel5.8(Bld47)_30Jun2023_SDCpatch_2' CALDBVER= 'b20230607_u20240201_x20240522_m20240701' / CALDB index versions used 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 = '01252695000' / Observation ID TARG_ID = '1252695 ' / Target ID SEG_NUM = '0 ' / Segment number CREATOR = 'TDRSS2FITS V3.22' / Program that created this FITS file ORIGIN = 'GSFC ' / Source of FITS file TLM2FITS= 'V3.22 ' / 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-8 / [s/s] relative errors expressed as rate TIERABSO= 1.0 / [s] timing precision in seconds CLOCKAPP= F / If clock correction are applied (F/T) TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock DATE = '2024-09-15T05:57:33' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 747253709.39456 / Start time DATE-OBS= '2024-09-05T18:28:24' TSTOP = 747253814.95434 / Stop time DATE-END= '2024-09-05T18:30:09' UTCFINIT= -34.1214600000000 / [s] 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 = 1252695 / Trigger Number XRA_OBJ = 345.798583984375 / [deg] XRT RA location GRB or Object XDEC_OBJ= 35.492000579834 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 105.55978000164 / TSTOP - TSTART ONTIME = 107.359703063965 / Time on target LIVETIME= 107.359703063965 / Ontime multiplied by DEADC EXPOSURE= 107.359703063965 / Total exposure, with all known correction DEADC = 1. / dead time correction UTCCTIME= -34.12146 / [s] UTC Correction TIME UTCCSEC = -35 / UTC Correction Seconds UTCCSUBS= 43927 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 747253815.04844 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 747253815 / ccsds PacKeT SEConds PKTSUBS = 2422 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= 'HAHJI8EJHAEJH5EJ' / HDU checksum updated 2024-09-15T06:12:47 DATASUM = '2492299378' / data unit checksum updated 2024-09-15T05:57:33 PROCVER = '3.20.02 ' / Processing script version SOFTVER = 'Hea_21Mar2024_V6.33.1_Swift_Rel5.8(Bld47)_30Jun2023_SDCpatch_2' CALDBVER= 'b20230607_u20240201_x20240522_m20240701' / CALDB index versions used END AE沀AEXAE,@ZvAE紧r@Oa@AE=J@GkPAE)@EAEN@FAE2@C4(AE_@8[ AEx@TAEq@@ܠAE@= 1 AEa|@= 1 AE @B@AE퓧@ApAEJb@GkPAE@?١@AE-@?١@AE2@@dAE>@EAEx@?١@AEP@BDXAEؾ@/١@AEaa@0ܠAEl@*:AEr@EAEJ@@ܠAER@8[ AE @EAE3@DAEՑ@ApAEx@G8AE/@B@AEw@ZAE@a@4AE@7kPAEQ]@= AEJ@> AEb@6{AEC@<aAEt3r@EAE֡@3AEy)@C4(AE@CAE@,aAEag@/١@AE@6{AE0@?١@AEJM@*:AEA|@ATAEʐ@N AES33@C4(AEb@6{AEdy@DAE@5AEuH@<aAEbx@DAEW@DAE@,aAEJ@7kPAE >@5AEm@1pAE23@/١@AE$@0ܠAECyS@6{AE@B@AE T @6{AE b9@QTAE fh@2@AE H@,aAE wJw@7kPAE @- AE .@K*AE 3]@LI AE ֌@1pAE"y@2@AEC@::AE3r@/١@AEa@*:AEE)@:AEͨX@R@AEVJ@5AEg@= AEg@,aAE3@$AExM@- AEy}@2@AE@8[ AE4@2@AEbc@9JAE$@B@AE@  AE5KI@"@AE@;*AEFX@> AE3@/١@AEW@8[ AEy>@0ܠAEim@3AE@5