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 = '01072990000' / Observation ID TARG_ID = '1072990 ' / 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 / 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 CLOCKAPP= F / If clock correction are applied (F/T) TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock DATE = '2021-09-22T06:42:46' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 653137392.615923 / Start time DATE-OBS= '2021-09-12T11:00:54' TSTOP = 653137919.142952 / Stop time DATE-END= '2021-09-12T11:11:54' CHECKSUM= '7J88AI768I76AI76' / HDU checksum updated 2021-09-22T07:00:32 DATASUM = ' 0' / data unit checksum updated 2021-09-22T06:42:46 OBJECT = 'GRB210912a' XOBS_ID = 01072990000 / Generating sequence PROCVER = '3.18.18 ' / Processing script version SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_18' CALDBVER= 'b20171016_u20201215_x20210915_m20210907' / CALDB index versions used UTCFINIT= -27.7144600000000 / [s] UTCF at TSTART END XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 31 / width of table in bytes NAXIS2 = 121 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 11 / number of fields in each row TTYPE1 = 'TIME ' / Time of events TFORM1 = '1D ' / data format of field: 8-byte DOUBLE TUNIT1 = 's ' / physical unit of field TTYPE2 = 'CCDFrame' / CCD FRAME number TFORM2 = '1J ' / data format of field: 4-byte INTEGER TTYPE3 = 'X ' / Event X position Sky coordinates TFORM3 = '1I ' / data format of field: 2-byte INTEGER TUNIT3 = 'pixel ' / physical unit of field TTYPE4 = 'Y ' / Event Y position Sky coordinates TFORM4 = '1I ' / data format of field: 2-byte INTEGER TUNIT4 = 'pixel ' / physical unit of field TTYPE5 = 'RAWX ' / Event X position RAW coordinates TFORM5 = '1I ' / data format of field: 2-byte INTEGER TUNIT5 = 'pixel ' / physical unit of field TTYPE6 = 'RAWY ' / Event Y position RAW coordinates TFORM6 = '1I ' / data format of field: 2-byte INTEGER TUNIT6 = 'pixel ' / physical unit of field TTYPE7 = 'DETX ' / Event X position DET coordinates TFORM7 = '1I ' / data format of field: 2-byte INTEGER TUNIT7 = 'pixel ' / physical unit of field TTYPE8 = 'DETY ' / Event Y position DET coordinates TFORM8 = '1I ' / data format of field: 2-byte INTEGER TUNIT8 = 'pixel ' / physical unit of field TTYPE9 = 'Amp ' / Amplifier node used for read out TFORM9 = '1B ' / data format of field: BYTE TTYPE10 = 'PHA ' / Pulse Height Analyzer after event recognition TFORM10 = '1J ' / data format of field: 4-byte INTEGER TUNIT10 = 'chan ' / physical unit of field TTYPE11 = 'STATUS ' / Event Quality Flag TFORM11 = '16X ' / data format of field: BIT EXTNAME = 'EVENTS ' / name of this binary table extension TLMIN3 = 1 / minimum legal value in this column TLMAX3 = 1000 / maximum legal value in this column TLMIN4 = 1 / minimum legal value in this column TLMAX4 = 1000 / maximum legal value in this column TLMIN5 = 0 / minimum legal value in this column TLMAX5 = 599 / maximum legal value in this column TLMIN6 = 0 / minimum legal value in this column TLMAX6 = 599 / maximum legal value in this column TLMIN7 = 1 / minimum legal value in this column TLMAX7 = 600 / maximum legal value in this column TLMIN8 = 1 / minimum legal value in this column TLMAX8 = 600 / maximum legal value in this column TLMIN10 = 0 / minimum legal value in this column TLMAX10 = 4095 / maximum legal value in this column TCTYP5 = 'RAWX ' / WCS axis type TCRVL5 = 299.5 / WCS reference value TCDLT5 = 1 / WCS coordinate increment TCRPX5 = 300.5 / WCS Reference point TCTYP6 = 'RAWY ' / WCS axis type TCRVL6 = 299.5 / WCS reference value TCDLT6 = 1 / WCS coordinate increment TCRPX6 = 300.5 / WCS Reference point COMMENT COMMENT NOTE : These files are telemetered via TDRSS. To save COMMENT telemetry only isolated pixels and non empty frames COMMENT are sent-down. COMMENT Therefore GTIs within this file may not be correct COMMENT because the valid exposures associated with the empty COMMENT frames are not included. This file should not be used COMMENT to evaluate count rates. COMMENT MESGNAME= 'XRT_PCMODE' / Name of the message MTYPE1 = 'SKY ' / DM keyword: Descriptor name MFORM1 = 'X, Y ' / [pixel] MTYPE2 = 'DET ' / DM keyword: Descriptor name MFORM2 = 'DETX, DETY' / [pixel] MTYPE3 = 'RAW ' / DM keyword: Descriptor name MFORM3 = 'RAWX, RAWY' / [pixel] TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'XRT ' / Instrument name OBS_ID = '01072990000' / Observation ID TARG_ID = '1072990 ' / 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 = '2021-09-22T06:42:46' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 653137392.615923 / Start time DATE-OBS= '2021-09-12T11:03:07' TSTOP = 653137919.142952 / Stop time DATE-END= '2021-09-12T11:11:54' TELAPSE = 526.527028560638 / TSTOP - TSTART ONTIME = 219.760831117639 / Sum of GTIs LIVETIME= 219.760831117639 / Ontime multiplied by DEADC EXPOSURE= 219.760831117639 / Exposure with all corrections DEADC = 1. / dead time correction TIMEDEL = 2.5073 / Data time resolution HDUCLASS= 'OGIP ' / Format conforms to OGIP standards HDUCLAS1= 'EVENTS ' / Event extension DATAMODE= 'PHOTON ' / Instrument operating mode OBS_MODE= 'POINTING' / default XRTPHA = T / default WHALFWD = 300 / Window Half Width WHALFHT = 300 / Window Half Height CCDEXPOS= 2.5073 / CCD Exposure used for rates APID = 1255 / Application Process Identifier RA_PNT = 129.733047485352 / [deg] Nominal RA DEC_PNT = 79.1942443847656 / [deg] Nominal Dec PA_PNT = 137.986 / [deg] Nominal Roll CHECKSUM= 'Ta5cUW5cTa5cTW5c' / HDU checksum updated 2021-09-22T07:00:32 DATASUM = '2039764824' / data unit checksum updated 2021-09-22T06:42:46 PROCVER = '3.18.18 ' / Processing script version SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_18' CALDBVER= 'b20171016_u20201215_x20210915_m20210907' / CALDB index versions used UTCFINIT= -27.7144600000000 / [s] UTCF at TSTART END Aw N֔  ?Aw N֔ ^Aw pdAw pAw )RAw )i6Aw R*UZAw R*c@Aw RgLAw RhNAw cAw vh-eAw VT!j`Aw VT;Aw 4!xAw $gkNAw ZCeAw ZCh_Aw ZChAw ZC.lAw f/Aw  gAw 1gAw 1)mAw ] gwAw ],mPAw !\0Aw !fAw ߲g Aw ߲ i7Aw ߲ kAw ߲/Aw   !dAw    gAw a)!!g}Aw r#!fMAw r#!tAw eQK%!gAw 1'wAw ( (dAw i)i4Aw +*Aw +`Aw +߫,bAw "/@J4Aw "/l%Aw %p1dhAw ,.&7!fAw /x 92jgAw 0d:!iAw 1A;tmAw 3:<*acAw 8>@@1fAw 9Ae4Aw :{BeAw =B\[DhAw >KE!hAw A+HGl_dAw A+HG/jAw C IeAw C I!fAw DJ1frAw GI@L gOAw HMd~Aw LMbP g Aw PhS gaAw QQXT(aAw S96V gAw U)W!fAw XZ XAw XZa`Aw \ǖ] jAw \ǖ]'lMAw bwb gAw bwb*qAw dfc2cAw dfcfAw dfc!gQAw g5f=Aw jdih giAw kEi!fBAw ljbAw oglj.Aw tkNpbAw tkNpjAw x.csnAw zDEuc Aw 2}hNAw zɀcFAw zɀ!gAw ryɂ!g&Aw ryɂ!lwAw ɍP Aw Ɏ!hAw HɏAw ɐ<wAw ɑ!fAw NɔjAw PBɗi$Aw (ɚl:Aw ɜ!kAw վɝ!hAw ɠg<Aw LvɤB.Aw LvɤcAw @Aw <#Aw =B\[Aw ?Aw A+HAw BDmAw C Aw FAw GI@Aw IqAw LMbAw M@Aw PhAw RAw S96Aw VSϏAw XAw Z}Aw \ǖAw ]nAw bwAw e_ ?Aw g5Aw i!Aw jdiAw n%GAw ogAw p|Aw tkNAw u;rAw x.cAw yn Aw zDEAw {Aw 2Aw hAw zAw 94'Py,,d9Aw Aw -z3 s_^CBcC c?'vP3,,d:}Aw vhAw xU s_^CBcC %?4'Q Pp,,d9]Aw VTAw y s_^CBcC )?L4' -~P ,,d7^Aw 4Aw ۯy s_^CBcC E>4' CDP,,d:Aw $gAw XˋyD  s_^CBcC @'  ZP,,d;Aw ZCAw hz3 s_^CBcC ?' 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