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 = '00361830000' / Observation ID TARG_ID = '361830 ' / 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 = 273719148.9945 / Start time DATE-OBS= '2009-09-04T01:01:05' TSTOP = 273719254.62184 / Stop time DATE-END= '2009-09-04T01:07:33' 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 = '2009-09-07T12:59:21' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -5.05500000000000 / [s] UTCF at TSTART CHECKSUM= 'neO5obO4nbO4nbO4' / HDU checksum updated 2009-09-07T14:05:02 DATASUM = ' 0' / data unit checksum updated 2009-09-07T12:59:21 OBJECT = 'GRB090904a' PROCVER = '3.13.17 ' / Processing script version SOFTVER = 'Hea_13May2009_V6.6.3_Swift_Rel3.3(Bld24.3)_12May2009' / HEASOFT and SCALDBVER= 'b20090130_u20090228_x20090515_m20090331' / CALDB index versions used ATTFLAG = '100 ' / Orgin of attitude information 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 = '00361830000' / Observation ID TARG_ID = '361830 ' / 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 = '2009-09-07T12:59:21' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 273719148.9945 / Start time DATE-OBS= '2009-09-04T01:05:47' TSTOP = 273719254.62184 / Stop time DATE-END= '2009-09-04T01:07:33' UTCFINIT= -5.05500000000000 / [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 = 361830 / Trigger Number XRA_OBJ = 100.899673461914 / [deg] XRT RA location GRB or Object XDEC_OBJ= 50.2016067504883 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 105.627340018749 / 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= -5.055 / [s] UTC Correction TIME UTCCSEC = -6 / UTC Correction Seconds UTCCSUBS= 47250 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 273719254.74174 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 273719254 / ccsds PacKeT SEConds PKTSUBS = 37087 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= '3bXYAbWY4bWYAbWY' / HDU checksum updated 2009-09-07T14:05:02 DATASUM = '51332222' / data unit checksum updated 2009-09-07T12:59:21 PROCVER = '3.13.17 ' / Processing script version SOFTVER = 'Hea_13May2009_V6.6.3_Swift_Rel3.3(Bld24.3)_12May2009' / HEASOFT and SCALDBVER= 'b20090130_u20090228_x20090515_m20090331' / CALDB index versions used ATTFLAG = '100 ' / Orgin of attitude information END APlAPmlD|APn}@fnAPo.@R4APp%s@J:APq6@IJAPrGX@BDXAPsYE@S4(APtj@?١@APu{$@CAPv@D#APw]@PAPx@Nq APy@M APz.^@TAP{t@UAP|@Q|AP~*@SAPE9@WkPAP(@] AP9@ajAPKU@`AP\\@aTAPms@arAP~@c4(AP/0@iAPt?@hyAP@`AP@c4(APF @cR"APi@dAPx@d_AP @bbRAP\@cAP+D@bdAP<@bdAPN.@]F% AP_u@ajAPpo@^ AP@]F% APE@YAP@] 1 APJ@] 1 APY@] 1 AP]@W/\AP@YJAPt@SAP /@^ APu@[*AP.@V?AP@@QpAPQF_@TAPb@O١@APs@QpAP+@T#AP^@TAP@JAP@QAP/@M 1 APud@KyAP@RdAP@SpAPG0@QpAP @ZAP1Ҟ@R4APC@IJAPT_[@PܠAPe@HAPvy@GkPAP/@O١@APv6@ATAPE@D#AP@DAPH@B@APގa@GkPAPo@D#AP~@?١@AP^@R4AP#@<aAP4K@@dAPF0@KyAPWu@GkPAPh@?١@APzu@([ APŋH@> APƜ@ATAPǭ@<aAPȿP@9JAP_@6{AP᤾@FhAP@EAP1{@H[ APv@0ܠAP&@4AP8G@6{APIG@3APZe@B@APk@EAP}"@([ APՎ_1@8[