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= 'BAT     '           / Instrument name                                OBS_ID  = '00090078001'        / Observation ID                                 TARG_ID =                90078 / Target ID                                      SEG_NUM =                    1 / 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:CLOCKAPP=                    F / If clock correction are applied (F/T)          TIMEUNIT= 's       '           / Time unit for timing header keywords           TSTART  = 2.616685950000000E+08 / time start                                    TSTOP   = 2.617554130690000E+08 / time stop                                     DATE-OBS= '2009-04-17T13:43:14' / Start date of observations                    DATE-END= '2009-04-18T13:50:12' / End date of observations                      ORIGIN  = 'NASA/GSFC'          / origin of fits file                            CREATOR = 'extractor v4.78'    / Extractor                                      TLM2FITS= 'V7.13'               / Telemetry converter version number            DATE    = '2009-04-23T13:55:27' / file creation date (YYYY-MM-DDThh:mm:ss UT)   NEVENTS =              6623368 / Number of events                               DATAMODE= 'Event   '           / Datamode                                       OBJECT  = 'PDS456  '           / Object name                                    ONTIME  = 6.004150000214577E+02 / On-source time                                EXPOSURE= 6.004150000214577E+02 / Exposure time                                 LIVETIME= 6.004150000214577E+02 / On-source time                                TELAPSE = 8.681806900000572E+04 / elapsed time                                  MJD-OBS = 5.493857244425926E+04 / MJD of data start time                        TIMEREF = 'LOCAL   '           / reference time                                 EQUINOX =            2.000E+03 / Equinox of celestial coord system              RADECSYS= 'FK5     '           / celestial coord system                         USER    = 'apsop   '           / User name of creator                           FILIN001= 'sw00090078001bevshsp_uf.evt' / Input file name                       TIMEZERO= 0.000000000000000E+00 / Time Zero                                     CHECKSUM= 'm5Ecm49am4Cam49a'   / HDU checksum updated 2009-04-23T14:07:19       DATASUM = '         0'         / data unit checksum updated 2009-04-23T13:55:27 PROCVER = '3.12.9  '           / Processing script version                      SOFTVER = 'Hea_19Sep2007_V6.3.2_Swift_Rel2.7.2(Bld21.2)_19Sep2007' / HEASOFT andCALDBVER= 'b20070924_u20071106_x20071101_m20071023' / CALDB index versions used SEQPNUM =                   12 / Number of times the dataset processed          RA_OBJ  =          262.0820833 / [deg] R.A. Object                              DEC_OBJ =         -14.26561111 / [deg] Dec Object                               RA_PNT  =     262.086756572972 / [deg] RA pointing                              DEC_PNT =    -14.2584533334603 / [deg] Dec pointing                             PA_PNT  =     80.9015505579048 / [deg] Position angle (roll)                    CATSRC  =                    F                                                  ATTFLAG = '100     '           / Orgin of attitude information                  UTCFINIT=    -4.66662000000000 / [s] UTCF at TSTART                             END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             XTENSION= 'BINTABLE'           / binary table extension                         BITPIX  =                    8 / 8-bit bytes                                    NAXIS   =                    2 / 2-dimensional binary table                     NAXIS1  =                   25 / width of table in bytes                        NAXIS2  =                    0 / Number of events                               PCOUNT  =                    0 / size of special data area:                     GCOUNT  =                    1 / one data group (required keyword)              TFIELDS =                    9 / number of fields in each row                   TTYPE1  = 'TIME    '           / Time of events                                 TFORM1  = '1D      '           / data format of field                           TUNIT1  = 's       '           / physical unit of field                         TTYPE2  = 'DET_ID  '           / Detector Channel, DM, Side and Block           TFORM2  = '1I      '           / data format of field                           TTYPE3  = 'EVENT_FLAGS'        / DM Event Flags                                 TFORM3  = '1B      '           / data format of field                           TTYPE4  = 'PHA     '           / Raw Pulse Height                               TFORM4  = '1I      '           / data format of field                           TUNIT4  = 'chan    '           / physical unit of field                         TLMIN4  = 0                    / minimum legal value in the column              TLMAX4  = 4095                 / maximum legal value in the column              TTYPE6  = 'DETX    '           / Event X position DET coordinates               TFORM6  = '1I      '           / data format of field                           TUNIT6  = 'pixel   '           / physical unit of field                         TLMIN6  = 0                    / minimum legal value in the column              TLMAX6  = 285                  / maximum legal value in the column              TTYPE7  = 'DETY    '           / Event Y position DET coordinates               TFORM7  = '1I      '           / data format of field                           TUNIT7  = 'pixel   '           / physical unit of field                         TLMIN7  = 0                    / minimum legal value in the column              TLMAX7  = 172                  / maximum legal value in the column              TCDLT6  = 1                    / WCS coordinate increment                       TCRPX6  = 0                    / WCS Reference point                            TCRVL6  = 0                    / WCS reference value                            TCDLT7  = 1                    / WCS coordinate increment                       TCRPX7  = 0                    / WCS Reference point                            TCRVL7  = 0                    / WCS reference value                            EXTNAME = 'EVENTS  '                                                            HDUCLASS= 'OGIP    '           / Format conforms to OGIP standards              HDUCLAS1= 'EVENTS  '           / Event extension                                MTYPE1  = 'DET'                / DM keyword: description name                   MFORM1  = 'DETX, DETY'         / [pixel]                                        GAINAPP =                    T / Gain correction has been applied               TIMESYS = 'TT      '           / time measured from                             MJDREFI =                51910 / MJD reference day                              MJDREFF = 7.428703700000000E-04 / MJD reference (fraction of day)               TIMEREF = 'LOCAL   '           / reference time                                 TASSIGN = 'SATELLITE'          / Time assigned by clock                         TIMEUNIT= 's       '           / unit for time keywords                         TIERRELA=               1.0E-8 / [s/s] relative errors expressed as rate        TIERABSO=                  1.0 / [s] timing  precision  in seconds              TSTART  =                    0                                                  TSTOP   =                    0                                                  DATE-OBS= '2009-04-17T13:43:14' / Start date of observations                    DATE-END= '2009-04-18T13:50:12' / End date of observations                      CLOCKAPP=                    F / default                                        TELAPSE =                    0                                                  ONTIME  =                    0                                                  LIVETIME=                    0                                                  EXPOSURE=                    0                                                  DEADC   =                   1. / dead time correction                           TIMEPIXR= 0.0                  / Bin time beginning=0 middle=0.5 end=1          TIMEDEL = 100.0E-6             / [s] time resolution of data                    TELESCOP= 'SWIFT   '           /  Telescope (mission) name                      INSTRUME= 'BAT     '           /  Instrument name                               DATAMODE= 'Event   '           / Datamode                                       OBS_ID  = '00090078001'        / Observation ID                                 TARG_ID =                90078 / Target ID                                      SEG_NUM =                    1 / Segment number                                 EQUINOX =            2.000E+03 / Equinox of celestial coord system              RADECSYS= 'FK5     '           / celestial coord system                         OBS_MODE= 'SLEW    '                                                            ORIGIN  = 'NASA/GSFC'          / origin of fits file                            CREATOR = 'bateconvert 6.3'    / Program that created this FITS file            TLM2FITS= 'V7.13'               / Telemetry converter version number            DATE    = '2009-04-23T13:55:27' / file creation date (YYYY-MM-DDThh:mm:ss UT)   LDPEBINS=                    0 / LDP Energy Bin count                           LDPTYPE =                   11 / LDP Type Code                                  LDPGAIN =                1110. / LDP Gain Index                                 LDPOFFST=                2970. / LDP Offset Index                               LDPNA1  = 'e7phfniz.evl'       / LDPNAME of nn'th processed LDP                 LDPNA2  = 'e7pjdqvz.evl'       / LDPNAME of nn'th processed LDP                 LDPNA3  = 'e7pjjf4z.evl'       / LDPNAME of nn'th processed LDP                 LDPNA4  = 'e7pjuokz.evl'       / LDPNAME of nn'th processed LDP                 LDPNA5  = 'e7pk4csz.evl'       / LDPNAME of nn'th processed LDP                 HISTORY ApID(567) LDP(50862) Row 1 to 1360237                                   HISTORY ApID(567) LDP(51985) Row 1349896 to 2564886                             HISTORY ApID(567) LDP(52105) Row 2555485 to 4107227                             HISTORY ApID(567) LDP(52363) Row 4097413 to 5338271                             HISTORY ApID(567) LDP(52485) Row 5328451 to 6634414                             HISTORY No single packet ApIDs contributed.                                     HISTORY LDP(567,50862) File: swift_ldp_015fde01_0bd4_567_50862.ccsds            HISTORY     Product(50862) BAT Pages(7983) Found Pages(7983)                    HISTORY     Valid Pages(7983) Simulated Pages (0) Missing Pages(0)              HISTORY LDP(567,51985) File: swift_ldp_015fde01_0bd4_567_51985.ccsds            HISTORY     Product(51985) BAT Pages(7333) Found Pages(7333)                    HISTORY     Valid Pages(7333) Simulated Pages (0) Missing Pages(0)              HISTORY LDP(567,52105) File: swift_ldp_015fde01_0bd4_567_52105.ccsds            HISTORY     Product(52105) BAT Pages(8784) Found Pages(8784)                    HISTORY     Valid Pages(8784) Simulated Pages (0) Missing Pages(0)              HISTORY LDP(567,52363) File: swift_ldp_015fde01_0bd4_567_52363.ccsds            HISTORY     Product(52363) BAT Pages(7462) Found Pages(7462)                    HISTORY     Valid Pages(7462) Simulated Pages (0) Missing Pages(0)              HISTORY LDP(567,52485) File: swift_ldp_015fde01_0bd4_567_52485.ccsds            HISTORY     Product(52485) BAT Pages(7748) Found Pages(7748)                    HISTORY     Valid Pages(7748) Simulated Pages (0) Missing Pages(0)              HISTORY TASK: FMEMSORT on FILENAME: sw00090078001bevshto_uf.evt[EVENTS]         HISTORY fmemsort4.1 at 2009-04-23T13:44:41                                      TTYPE8  = 'PI      '           / Pulse Invariant                                TFORM8  = '1I      '           / format of field                                TTYPE9  = 'ENERGY  '           / Nominal Energy of event                        TFORM9  = '1I      '           / format of field                                TUNIT8  = 'chan    '           / physical unit of field                         TLMIN8  =               -16384 / Minimum legal value                            TLMAX8  =                16383 / Maximum legal value                            TUNIT9  = 'keV     '           / physical unit of field                         TSCAL9  =                  0.1 / data scaling                                   GAINMETH= 'FIXEDDAC'           / Cubic ground gain/offset correction using DAC-bHISTORY                                                                         HISTORY START PARAMETER list for bateconvert_4.3 at 2009-04-23T13:52:01         HISTORY                                                                         HISTORY P1 infile = sw00090078001bevshsp_uf.evt                                 HISTORY P2 calfile = sw00349447000bcbo0b9ag0456_01.fits                         HISTORY P3 residfile = CALDB                                                    HISTORY P4 pulserfile = CALDB                                                   HISTORY P5 fltpulserfile = CALDB                                                HISTORY P6 outfile = NONE                                                       HISTORY P7 calmode = INDEF                                                      HISTORY P8 zeroit = no                                                          HISTORY P9 scaled_energy = yes                                                  HISTORY P10 clobber = yes                                                       HISTORY P11 chatter = 3                                                         HISTORY P12 history = yes                                                       HISTORY P13 mode = hl                                                           HISTORY END PARAMETER list for bateconvert_4.3                                  HISTORY                                                                         TIMEZERO= 0.000000000000000E+00 / Time Zero                                     OBJECT  = 'PDS456  '           / Object name                                    MJD-OBS = 5.493857244425926E+04 / MJD of data start time                        USER    = 'apsop   '           / User name of creator                           NPIXSOU =     4.9478000000E+04 / Number of pixels in selected region            CHECKSUM= '92jSF1hS91hSE1hS'   / HDU checksum updated 2009-04-23T14:07:19       DATASUM = '2867275442'         / data unit checksum updated 2009-04-23T13:55:27 PROCVER = '3.12.9  '           / Processing script version                      SOFTVER = 'Hea_19Sep2007_V6.3.2_Swift_Rel2.7.2(Bld21.2)_19Sep2007' / HEASOFT andCALDBVER= 'b20070924_u20071106_x20071101_m20071023' / CALDB index versions used SEQPNUM =                   12 / Number of times the dataset processed          RA_OBJ  =          262.0820833 / [deg] R.A. Object                              DEC_OBJ =         -14.26561111 / [deg] Dec Object                               RA_PNT  =     262.086756572972 / [deg] RA pointing                              DEC_PNT =    -14.2584533334603 / [deg] Dec pointing                             PA_PNT  =     80.9015505579048 / [deg] Position angle (roll)                    CATSRC  =                    F                                                  ATTFLAG = '100     '           / Orgin of attitude information                  UTCFINIT=    -4.66662000000000 / [s] UTCF at TSTART                             TNULL9  =               -32768 / data null value                                BCALFILE= 'sw00090078001bgocb.hk.gz' / BAT total linear gain/offset file name   BRESFILE= 'swbquadres20030304v003.fits' / BAT Residual from linear gain file namBPULFILE= 'swbpulsecal20080601v001.fits' / BAT Ground Pulser DAC to keV file namBFLTFILE= 'swbpulseflt20040101v001.fits' / BAT Flight Pulser DAC to keV file namHISTORY                                                                         HISTORY START PARAMETER list for bateconvert_6.3 at 2014-11-11T13:47:38         HISTORY                                                                         HISTORY P1 infile = /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reHISTORY P1 proc/GRB090418B/00090078001/bat/event/sw00090078001bevshsl_uf.evt    HISTORY P2 calfile = /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_rHISTORY P2 eproc/GRB090418B/00090078001/bat/hk/sw00090078001bgocb.hk.gz         HISTORY P3 residfile = CALDB                                                    HISTORY P4 pulserfile = CALDB                                                   HISTORY P5 fltpulserfile = CALDB                                                HISTORY P6 outfile = NONE                                                       HISTORY P7 calmode = FIXEDDAC                                                   HISTORY P8 zeroit = NO                                                          HISTORY P9 scaled_energy = YES                                                  HISTORY P10 clobber = NO                                                        HISTORY P11 chatter = 2                                                         HISTORY P12 history = YES                                                       HISTORY P13 mode = ql                                                           HISTORY END PARAMETER list for bateconvert_6.3                                  HISTORY                                                                         HISTORY CFITSIO used the following filtering expression to create this table:   HISTORY /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB0904HISTORY 18B/00090078001/bat/event/sw00090078001bevshsl_uf.evt[EVENTS][gtifilter(HISTORY "/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB090HISTORY 418B/00090078001-results/events/sw00090078001b_all.evt-totgti.gti",TIME)HISTORY ]                                                                       HISTORY                                                                         HISTORY START PARAMETER list for ftmerge_2.20 at 2014-11-11T13:47:40            HISTORY                                                                         HISTORY P1 (infile = @/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_HISTORY P1 reproc/GRB090418B/00090078001-results/events/sw00090078001b_all.evt-eHISTORY P1 ts.lis)                                                              HISTORY                                                                         HISTORY START FILE listing: sw00090078001b_all.evt-events.lis                   HISTORY                                                                         HISTORY F1 /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB0HISTORY F1 90418B/00090078001/bat/event/sw00090078001bevshsl_uf.evt[EVENTS][gtifHISTORY F1 er("/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/HISTORY F1 090418B/00090078001-results/events/sw00090078001b_all.evt-totgti.gti"HISTORY F1 ME)]                                                                 HISTORY END FILE listing: sw00090078001b_all.evt-events.lis                     HISTORY                                                                         HISTORY P2 outfile = /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_rHISTORY P2 eproc/GRB090418B/00090078001-results/events/sw00090078001b_all.evt   HISTORY P3 columns = *                                                          HISTORY P4 insertrow = 0                                                        HISTORY P5 lastkey =                                                            HISTORY P6 copyall = YES                                                        HISTORY P7 skipbadfiles = NO                                                    HISTORY P8 clobber = YES                                                        HISTORY P9 chatter = 1                                                          HISTORY P10 history = YES                                                       HISTORY P11 mode = ql                                                           HISTORY END PARAMETER list for ftmerge_2.20                                     HISTORY                                                                         TRIGTIME=        261738025.849 / [s] MET Trigger Time                           TTYPE5  = 'MASK_WEIGHT'        / Ray-traced weighting factor                    TFORM5  = '1E      '           / format of field                                BATCREAT= 'batmaskwtevt 1.22'  / BAT Program that modified this FITS file       COMMENT ---------------------------------- BAT Mask Orientation                 MASKBATX=                   0. / [cm] Center of mask tile plane in BAT_X        MASKBATY=                   0. / [cm] Center of mask tile plane in BAT_Y        MASKBATZ=                100.3 / [cm] Top of mask tile plane in BAT_Z           MASKOFFX=               -0.145 / [cm] Offset of mask in BAT_X                   MASKOFFY=                0.114 / [cm] Offset of mask in BAT_Y                   MASKOFFZ=                 0.05 / [cm] Offset of mask in BAT_Z                   MASKX0  =              -124.25 / [cm] Position of mask corner in BAT_X          MASKY0  =               -63.25 / [cm] Position of mask corner in BAT_Y          MASKPSI0=                   0. / [deg] Mask Euler rotation about X-axis         MASKPSI1=                   0. / [deg] Mask Euler rotation about Y-axis         MASKPSI2=                   0. / [deg] Mask Euler rotation about Z-axis         MASKCELX=                  0.5 / [cm] Size of mask cell in BAT_X                MASKCELY=                  0.5 / [cm] Size of mask cell in BAT_Y                MASKCELZ=                  0.1 / [cm] Size of mask cell in BAT_Z                COMMENT ---------------------------------- BAT Detector Orientation             DETBATX =                   0. / [cm] Center of detector plane in BAT_X         DETBATY =                   0. / [cm] Center of detector plane in BAT_Y         DETBATZ =                 0.35 / [cm] Top of detector plane in BAT_Z            DETOFFX =                   0. / [cm] Offset of detector plane in BAT_X         DETOFFY =                   0. / [cm] Offset of detector plane in BAT_Y         DETOFFZ =                   0. / [cm] Offset of detector plane in BAT_Z         DETCELX =                 0.42 / [cm] Size of detector pitch cell in BAT_X      DETCELY =                 0.42 / [cm] Size of detector pitch cell in BAT_Y      DETCELZ =                  0.2 / [cm] Size of detector pitch cell in BAT_Z      DETSIZEX=                  0.4 / [cm] Size of detector in BAT_X                 DETSIZEY=                  0.4 / [cm] Size of detector in BAT_Y                 DETSIZEZ=                  0.2 / [cm] Size of detector in BAT_Z                 BAT_RA  =               225.91 / [deg] Right ascension of source                BAT_DEC =               17.224 / [deg] Declination of source                    BAT_XOBJ=    -7146129.50993154 / [cm] Position of source in BAT_X               BAT_YOBJ=    -5013327.47010566 / [cm] Position of source in BAT_Y               BAT_ZOBJ=            10000000. / [cm] Position of source in BAT_Z               COORTYPE= 'sky     '           / Type of coordinates specified for weighting    FFAPP   =                    T / Projection correction applied?                 NFAPP   =                    F / Near-field correction applied? ~(COS+RSQ)      PCODEAPP=                    T / Partial coding correction applied?             PCODEFR =    0.290647655725479 / Partial coding fraction of target              NGPIXAPP=                    T / Normalized by number of detectors?             NGOODPIX=                24411 / Number of enabled detectors                    MSKWTSQF=     1.20668083342337 / Half-variance of mask weight map               MSKWTAPP=                    T / Correction for mask weight technique applied?  BDISTAPP=                    F /  BAT image corrected for distortions?          TDMIN5  =         -0.004173358 / Minimum column data value                      TDMAX5  =          0.004104933 / Maximum column data value                      APERTURE= 'swbaperflux20041120v001.fits' / BAT aperture file name               BTELDEF = 'swb20070911v001.teldef' / BAT teldef file name                       HISTORY CFITSIO used the following filtering expression to create this table:   HISTORY /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB0904HISTORY 18B/00090078001-results/events/sw00090078001b_all.evt[EVENTS][gtifilter(HISTORY "/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB090HISTORY 418B/00090078001-results/events/sw00090078001b_postslew.evt-totgti.gti",HISTORY TIME)]                                                                  HISTORY                                                                         HISTORY START PARAMETER list for ftmerge_2.20 at 2014-11-11T13:48:32            HISTORY                                                                         HISTORY P1 (infile = @/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_HISTORY P1 reproc/GRB090418B/00090078001-results/events/sw00090078001b_postslew.HISTORY P1 -events.lis)                                                         HISTORY                                                                         HISTORY START FILE listing: sw00090078001b_postslew.evt-events.lis              HISTORY                                                                         HISTORY F1 /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB0HISTORY F1 90418B/00090078001-results/events/sw00090078001b_all.evt[EVENTS][gtifHISTORY F1 er("/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/HISTORY F1 090418B/00090078001-results/events/sw00090078001b_postslew.evt-totgtiHISTORY F1 i",TIME)]                                                            HISTORY END FILE listing: sw00090078001b_postslew.evt-events.lis                HISTORY                                                                         HISTORY P2 outfile = /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_rHISTORY P2 eproc/GRB090418B/00090078001-results/events/sw00090078001b_postslew.eHISTORY P3 columns = *                                                          HISTORY P4 insertrow = 0                                                        HISTORY P5 lastkey =                                                            HISTORY P6 copyall = YES                                                        HISTORY P7 skipbadfiles = NO                                                    HISTORY P8 clobber = YES                                                        HISTORY P9 chatter = 1                                                          HISTORY P10 history = YES                                                       HISTORY P11 mode = ql                                                           HISTORY END PARAMETER list for ftmerge_2.20                                     HISTORY                                                                         FILIN001= '/local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB'END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             XTENSION= 'BINTABLE'           / binary table extension                         BITPIX  =                    8 / 8-bit bytes                                    NAXIS   =                    2 / 2-dimensional binary table                     NAXIS1  =                   16 / width of table in bytes                        NAXIS2  =                    0 / number of rows in table                        PCOUNT  =                    0 / size of special data area                      GCOUNT  =                    1 / one data group (required keyword)              TFIELDS =                    2 / number of fields in each row                   TTYPE1  = 'START   '           / label for field   1                            TFORM1  = '1D      '           / data format of field: 8-byte DOUBLE            TUNIT1  = 's       '           / physical unit of field                         TTYPE2  = 'STOP    '           / label for field   2                            TFORM2  = '1D      '           / data format of field: 8-byte DOUBLE            TUNIT2  = 's       '           / physical unit of field                         EXTNAME = 'GTI     '                                                            HISTORY TASK:MGTIME on files /local/data/bat1/alien/Swift_3rdBATcatalog/event/baHISTORY tevent_r                                                                HISTORY /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB0904HISTORY 18B/0009                                                                TIMEZERO=                  0.0 / offset to be applied to times given in the dataHDUCLASS= 'OGIP    '           / format conforms to OGIP/GSFC standards         HDUCLAS1= 'GTI     '           / Extension contains Good Time Intervals         HDUCLAS2= 'ALL     '                                                            CHECKSUM= 'ZVLddVIbZVIbdVIb'   / HDU checksum updated 2014-11-11T13:48:31       DATASUM = '         0'         / data unit checksum updated 2014-11-11T13:48:31 TSTART  =                    0                                                  TSTOP   =                    0                                                  ONTIME  =                    0                                                  EXPOSURE=                    0                                                  TELAPSE =                    0                                                  LIVETIME=                    0                                                  END