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 = '00851855000' / Observation ID TARG_ID = '851855 ' / 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 = 555167059.8095 / Start time DATE-OBS= '2018-08-05T13:02:31' TSTOP = 555167165.42834 / Stop time DATE-END= '2018-08-05T13:06:00' 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 = '2018-08-15T05:39:27' / file creation date (YYYY-MM-DDThh:mm:ss UT) UTCFINIT= -21.3789000000000 / [s] UTCF at TSTART CHECKSUM= 'YA7Fa549TA4EY549' / HDU checksum updated 2018-08-15T06:16:20 DATASUM = ' 0' / data unit checksum updated 2018-08-15T05:39:27 OBJECT = 'GRB180805b' PROCVER = '3.18.03 ' / Processing script version SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_15' CALDBVER= 'b20171016_u20170922_x20180710_m20180709' / 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 = '00851855000' / Observation ID TARG_ID = '851855 ' / 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 = '2018-08-15T05:39:27' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 555167059.8095 / Start time DATE-OBS= '2018-08-05T13:04:14' TSTOP = 555167165.42834 / Stop time DATE-END= '2018-08-05T13:06:00' UTCFINIT= -21.3789000000000 / [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 = 851855 / Trigger Number XRA_OBJ = 25.7926578521729 / [deg] XRT RA location GRB or Object XDEC_OBJ= -17.5058250427246 / [deg] XRT DEC location GRb or Object TERMMODE= 0 / XRT termination mode TELAPSE = 105.618839979172 / 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= -21.3789 / [s] UTC Correction TIME UTCCSEC = -22 / UTC Correction Seconds UTCCSUBS= 31055 / [2*10**(-5) s] UTC Correction SUBSeconds PKTTIME = 555167165.5417 / [s] ccsds PacKeT TIME=PKTSEC+PKTSUBS*2e-5 PKTSEC = 555167165 / ccsds PacKeT SEConds PKTSUBS = 27085 / [2*10**(-5) s] ccsds PacKeT SUBSeconds APID = 1253 / Application Process Identifier CHECKSUM= '7mH6Bj959jE5Aj95' / HDU checksum updated 2018-08-15T06:16:20 DATASUM = '752091629' / data unit checksum updated 2018-08-15T05:39:27 PROCVER = '3.18.03 ' / Processing script version SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_15' CALDBVER= 'b20171016_u20170922_x20180710_m20180709' / CALDB index versions used END A睲AtAh @YJAM@ApAy@ATAK@::A6z@D#A٩@C4(A|1@KyA%`@2@A@H[ A6e@ApAF@FAGu@PdAM@EAX,@EA[@8[ Aj7@N Aں@DA{|@B@A@SpA@<aAf'@ATA W@FhA&@Nq AO@> A7@= A@ATAI7@S4(A#@ATAZ~R@PA @F{Ak @ATAg8@5A} @2@A@0ܠAOv@B@A@@dA@0ܠA(9@ATAی@IA9~@?١@A!B@8[ AJr@1pAg@7kPA\ @> A@/١@AmQ/@&{A@ATA~>@B@A9m@ATAďܜ@H[ A@B@Aš"S@RDXA)ł@4AƲh @> A; 9@- Aîh@H[ ALQ@@ܠA@BDXA]N@6{A:~@3An@,aA4@0ܠAˀ#d@@ܠA@5Ȃi@<aA J@M 1 A͢y@9JA+R@9JAγ@1pA<@([ A:@FhAM@> AցE@7kPA_$t@= 1 AT@LaApi@DA @KyAӁ@FA S@5AԒ@@C4(A@3Aդ;O@8[ A,@C4(Aֵ@G8A>$@ATAe@BDXAOj@9JA @TA`K@5ASz@BDXAq@ATA1@K*Aۃ<`@1pA ߏ@,aAܔ@3A%F@,aAݥu@0ܠA.j@([