SIMPLE  =                    T / file does conform to FITS standard             BITPIX  =                   32 / number of bits per data pixel                  NAXIS   =                    2 / number of data axes                            NAXIS1  =                 1000 / length of data axis 1                          NAXIS2  =                 1000 / length of data axis 2                          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 HDUCLASS= 'ogip    '           / Format conforms to OGIP/GSFC conventions       HDUCLAS1= 'IMAGE   '           / Extension contains an image                    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:TIMEREF = 'LOCAL   '           / reference time                                 TASSIGN = 'SATELLITE'          / Time assigned by clock                         TIMEUNIT= 's       '           / Time unit for timing header keywords           TIERRELA=  1.0000000000000E-08 / [s/s] Estimated relative clock rate error      TIERABSO=  1.0000000000000E+00 / [s] Estimated absolute clock offset error      TSTART  = 7.176266198451476E+08 / time start                                    TSTOP   = 7.176266239549425E+08 / time stop                                     DATE-OBS= '2023-09-28T20:43:34' / Start date of observations                    DATE-END= '2023-09-28T20:43:39' / End date of observations                      CLOCKAPP=                    F / If clock correction are applied (F/T)          TELAPSE = 4.109794855117798E+00 / elapsed time                                  ONTIME  = 4.109794855117798E+00 / On-source time                                LIVETIME= 4.104652839672340E+00 / Deadtime corrected on-source time             EXPOSURE= 4.104652839672340E+00 / Exposure time                                 DEADC   =       9.98748839E-01 / Deadtime correction                            TIMEPIXR=  5.0000000000000E-01 / Bin time beginning=0.0 middle=0.5 end=1.       TIMEDEL =  1.7791319769094E-03 / time resolution of data (in seconds)           TELESCOP= 'SWIFT   '           / Telescope (mission) name                       INSTRUME= 'XRT     '           / Instrument name                                DATAMODE= 'WINDOWED'           / Datamode                                       OBS_ID  = '00016095019'        / Observation ID                                 TARG_ID =                16095 / Target ID                                      SEG_NUM =                   19 / Segment number                                 EQUINOX =            2.000E+03 / Equinox of celestial coord system              RADECSYS= 'FK5     '           / celestial coord system                         OBS_MODE= 'POINTING'           / default                                        ORIGIN  = 'NASA/GSFC'          / origin of fits file                            CREATOR = 'extractor v5.24'    / Extractor                                      TLM2FITS= 'V6.4    '           / Telemetry converter version number             DATE    = '2023-10-08T06:43:18' / file creation date (YYYY-MM-DDThh:mm:ss UT)   WAVEFORM=                   60 / CCD wave form used in data                     XRTMODE =                    6 / Standard mode value                            FORMATVS=                    1 / Format version                                 CCDEXPOS=  1.0675000000000E+00 / Nominal CCD Exposure Time                      WM1STCOL=                  199 / xrttimetag-updated WT mode 1st col. Was:  200  WMCOLNUM=                  200 / Windowing mode number of columns               XRTVSUB =                    6 / CCD int Vsubstrate                             VSUBBAD =                    0 / percent not XRTVSUB                            XRA_OBJ =  2.2895908807142E+02 / [deg] XRT RA Object                            XDEC_OBJ=  5.6344213836289E+01 / [deg] XRT Dec Object                           XRA_PNT =  2.2895908807142E+02 / [deg] XRT RA pointing                          XDEC_PNT=  5.6344213836289E+01 / [deg] XRT Dec pointing                         HISTORY File modified by 'xrttimetag_0.8.1' (swxrtdas_12Apr19_v3.5.0) at        HISTORY 2023-10-08T06:42:24: derived exposure time.                             HISTORY Used following file(s):                                                 HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/teldef/swx20210101v001.teldef teldef CALDB file            HISTORY sw00016095019xtr.hk trailer file                                        HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/instrument/swxwtcolum20010101v002.fits WT offset column    HISTORY file                                                                    HISTORY sw00016095019xhd.hk housekeeping file                                   ABERRAT =                    F / Has aberration been corrected for in sky coordsFOLLOWSU=                    F / Has the Sun position been recalculated?        XRTTIMES=                    T / Are photon arrival times computed (T/F)?       XRTDETXY=                    T / Are DETX/Y coordinates computed (T/F)?         XRAWXCOR=                    T / Is RAWX corrected (T/F)?                       ATTFLAG = '110     '           / Attitude type flag                             HISTORY                                                                         HISTORY START PARAMETER list for xrttimetag_0.8.1 at 2023-10-08T06:42:24        HISTORY                                                                         HISTORY P1 infile = sw00016095019xwtw2po_uf.evt                                 HISTORY P2 outfile = timefile.tmp                                               HISTORY P3 hdfile = sw00016095019xhd.hk                                         HISTORY P4 trfile = sw00016095019xtr.hk                                         HISTORY P5 attfile = sw00016095019pat.fits                                      HISTORY P6 usesrcdet = no                                                       HISTORY P7 usehkkey = no                                                        HISTORY P8 srcdetx = 300                                                        HISTORY P9 srcdety = 300                                                        HISTORY P10 srcra = 228.959088071419                                            HISTORY P11 srcdec = 56.3442138362885                                           HISTORY P12 ranom = 228.959088071419                                            HISTORY P13 decnom = 56.3442138362885                                           HISTORY P14 teldef = CALDB                                                      HISTORY P15 colfile = CALDB                                                     HISTORY P16 npixels = 1850                                                      HISTORY P17 percent = 50.                                                       HISTORY P18 aberration = no                                                     HISTORY P19 attinterpol = no                                                    HISTORY P20 clobber = yes                                                       HISTORY P21 history = yes                                                       HISTORY P22 chatter = 3                                                         HISTORY P23 mode = hl                                                           HISTORY END PARAMETER list for xrttimetag_0.8.1                                 HISTORY                                                                         HISTORY File modified  by xrtflagpix_0.7.5 (swxrtdas_12Apr19_v3.5.0) at         HISTORY 2023-10-08T06:42:25                                                     HISTORY Overwritten  STATUS column.                                             HISTORY Used following file(s) to get bad pixels:                               HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/badpix/swxbadpix20090821v005.fits CALDB bad pixels file    HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/badpix/swxonboardbp20090821v004.fits on-board bad pixels   HISTORY file                                                                    COMMENT Events STATUS flags                                                     COMMENT b0000000000000000 Good event                                            COMMENT b0000000000000001 Event falls in bad pixel from CALDB                   COMMENT b0000000000000010 Event falls in bad pixel from on board Bad Pixels     COMMENT Tabl                                                                    COMMENT                                                                         COMMENT b0000000000000100 Event falls in burned spot region                     COMMENT b0000000000001000 Event falls in hot bad pixel                          COMMENT b0000000000010000 Event falls in user bad pixel                         COMMENT b0000000000100000 Event falls in flickering bad pixel                   COMMENT b0000000001000000 Event falls in telemetred bad pixel                   COMMENT b0000000010000000 Event has a neighbor bad from hot and flickering      COMMENT pixel                                                                   COMMENT s list                                                                  COMMENT b0000000100000000 Column                                                COMMENT b0000001000000000 Event has PHA[1] < Event threshold                    COMMENT b0000010000000000 Event has a neighbor bad from bad pixels list         COMMENT b0000100000000000 Bad event                                             COMMENT b0001000000000000 Event from calibration source 1                       COMMENT b0010000000000000 Event from calibration source 2                       COMMENT b0100000000000000 Event from calibration source 3                       COMMENT b1000000000000000 Event from calibration source 4                       XRTFLAG =                    T / Are events flagged (T/F)?                      HISTORY                                                                         HISTORY START PARAMETER list for xrtflagpix_0.7.5 at 2023-10-08T06:42:25        HISTORY                                                                         HISTORY P1 infile = sw00016095019xwtw2po_uf.evt                                 HISTORY P2 outfile = flagfile.tmp                                               HISTORY P3 hdfile = sw00016095019xhd.hk                                         HISTORY P4 bpfile = CALDB                                                       HISTORY P5 srcfile = CALDB                                                      HISTORY P6 userbpfile = NONE                                                    HISTORY P7 bptable = CALDB                                                      HISTORY P8 thrfile = CALDB                                                      HISTORY P9 phas1thr = 80                                                        HISTORY P10 maxtemp = 0                                                         HISTORY P11 outbpfile = NONE                                                    HISTORY P12 overstatus = yes                                                    HISTORY P13 chatter = 3                                                         HISTORY P14 clobber = yes                                                       HISTORY P15 history = yes                                                       HISTORY P16 mode = hl                                                           HISTORY END PARAMETER list for xrtflagpix_0.7.5                                 HISTORY                                                                         HISTORY CFITSIO used the following filtering expression to create this table:   HISTORY sw00016095019xwtw2po_uf.evt[EVENTS][gtifilter()]                        HISTORY File modified by 'xrtwtcorr_0.2.5' (swxrtdas_12Apr19_v3.5.0) at         HISTORY 2023-10-08T06:42:25: re-calcolated PHA.                                 HISTORY Used following file(s):                                                 HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/instrument/swxwtcolum20010101v002.fits WT offset column    HISTORY file                                                                    XRTPHACO=                    T / Is PHA bias subtracted (T/F)?                  HISTORY File modified by 'xrtwtcorr_0.2.5' (swxrtdas_12Apr19_v3.5.0) at         HISTORY 2023-10-08T06:42:25: sorted by PHA - Trailing Charge Event(s).          HISTORY TASK: FSELECT on FILENAME: wtfile.tmp                                   HISTORY fselect4.4 at 2023-10-08T06:42:25                                       HISTORY Expression: STATUS==bxxxxxxxxxx0xxxxx                                   DSTYP1  = 'GRADE   '           / Data subspace descriptor: name                 DSFORM1 = 'I       '           / Data subspace descriptor: datatype             DSVAL1  = '0:2     '           / Data subspace descriptor: value                XRTEVREC=                    T / Event Recognition is already computed?         XRTEVTHR=                   60 / Event threshold level                          XRTSPLIT=                   60 / split threshold level                          XRTRAWEV=                   51 / # of raw total events                          XRTNULEV=  7.6470588235294E+01 / NULL events percentage                         XRTNOREC=  1.9607843137255E+00 / Non reconstructed events percentage            XRTSATEV=  1.3725490196078E+01 / Saturated events percentage                    HISTORY File modified by 'xrtevtrec_0.5.2' (swxrtdas_12Apr19_v3.5.0) at         HISTORY 2023-10-                                                                HISTORY 08T06:42:25: performed event recostrunction for windowed timing mode.   HISTORY Used                                                                    HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/dat     HISTORY a/swift/xrt/bcf/grade/swxgrade20010101v002.fits CALDB grade fits file.  HISTORY Deleted  rows with PHA set to NULL.                                     HISTORY                                                                         HISTORY START PARAMETER list for xrtevtrec_0.5.2 at 2023-10-08T06:42:25         HISTORY                                                                         HISTORY P1 infile = sw00016095019xwtw2po_ufre.evt                               HISTORY P2 hdfile = sw00016095019xhd.hk                                         HISTORY P3 outfile = recfile.tmp                                                HISTORY P4 gradefile = CALDB                                                    HISTORY P5 thrfile = CALDB                                                      HISTORY P6 addcol = no                                                          HISTORY P7 delnull = yes                                                        HISTORY P8 flagneigh = yes                                                      HISTORY P9 event = 80                                                           HISTORY P10 split = 80                                                          HISTORY P11 clobber = yes                                                       HISTORY P12 history = yes                                                       HISTORY P13 chatter = 5                                                         HISTORY P14 mode = hl                                                           HISTORY END PARAMETER list for xrtevtrec_0.5.2                                  HISTORY                                                                         HISTORY File modified by 'xrtcalcpi_0.4.4' (swxrtdas_12Apr19_v3.5.0) at         HISTORY 2023-10-08T06:42:27:                                                    HISTORY Added PI column.                                                        HISTORY Used                                                                    HISTORY /aps/calibration/caldb_b20171016_xrt20230725_u20201215_clock156/data/s  HISTORY wift/xrt/bcf/gain/swxwtgains6_20010101v025.fits gain CALDB file         HISTORY The conversion from DETY to RAWY is: RAWY = DETY - 1                    XPITYPE = 'TOTAL   '           / PI correction type applied                     XRTPI   =                    T / Is PI computed (T/F)?                          HISTORY                                                                         HISTORY START PARAMETER list for xrtcalcpi_0.4.4 at 2023-10-08T06:42:27         HISTORY                                                                         HISTORY P1 infile = sw00016095019xwtw2po_ufre.evt                               HISTORY P2 outfile = pifile.tmp                                                 HISTORY P3 hdfile = sw00016095019xhd.hk                                         HISTORY P4 gainfile = CALDB                                                     HISTORY P5 seed = -1457                                                         HISTORY P6 randomflag = yes                                                     HISTORY P7 gainnom = -99                                                        HISTORY P8 offset = 0                                                           HISTORY P9 corrtype = TOTAL                                                     HISTORY P10 userctcorrpar = no                                                  HISTORY P11 alpha1 = 0                                                          HISTORY P12 alpha2 = 0                                                          HISTORY P13 ebreak = 1                                                          HISTORY P14 userctipar = no                                                     HISTORY P15 beta1 = 0                                                           HISTORY P16 beta2 = 0                                                           HISTORY P17 ecti = 1                                                            HISTORY P18 offsetniter = 2                                                     HISTORY P19 savepioffset = no                                                   HISTORY P20 savepinom = no                                                      HISTORY P21 clobber = yes                                                       HISTORY P22 history = yes                                                       HISTORY P23 chatter = 2                                                         HISTORY P24 mode = hl                                                           HISTORY END PARAMETER list for xrtcalcpi_0.4.4                                  HISTORY                                                                         TIMEZERO= 0.000000000000000E+00 / Time Zero                                     OBJECT  = 'NGC5907ULX-1'       / Object name                                    DEADAPP =                    F / Has DEADC been applied to data                 MJD-OBS = 6.021586439848551E+04 / MJD of data start time                        USER    = 'apsop   '           / User name of creator                           FILIN001= 'sw00016095019xwtw2po_cl.evt' / Input file name                       NPIXSOU =     1.0000000000E+06 / Number of pixels in selected region            HISTORY TASK: FSELECT on FILENAME: ./xselect34958evt.flt                        HISTORY fselect4.4 at 2023-10-08T06:42:33                                       HISTORY Expression: STATUS==b0                                                  HISTORY                                                                         HISTORY START PARAMETER list for xrtscreen_0.5.0 at 2023-10-08T02:42:33         HISTORY                                                                         HISTORY P1 gtiexpr = "(ELV>=28||BR_EARTH>=120)&&(SUN_ANGLE>=45&&ANG_DIST<=0.15&&HISTORY P1 MOON_ANGLE>=14)&&((CCDTemp>=-102&&CCDTemp<=-47)&&(Vod1>=29.8&&Vod1<=3HISTORY P1 0.25)&&(Vod2>=29.30&&Vod2<=29.80)&&(Vrd1>=16.40&&Vrd1<=16.80)&&(Vrd2>HISTORY P1 =16.45&&Vrd2<=16.90)&&(Vsub>=5.67&&Vsub<=6.07)&&(Vbackjun>=5.65&&VbacHISTORY P1 kjun<=6.05)&&(BaseLin1>=0.1&&BaseLin1<=0.4)&&(BaseLin2>=-0.1&&BaseLinHISTORY P1 2<=0.1))&&((STAST_LOSSFCN>=0&&STAST_LOSSFCN<=5.0E-9)||(STAST_LOSSFCN>HISTORY P1 =1&&STAST_LOSSFCN<=5.0E+3))&&(STLOCKFL==1)&&((SETTLED==1&&TEN_ARCMIN=HISTORY P1 =1)||(SETTLED==1&&TEN_ARCMIN==0&&SAFEHOLD==0))"                      HISTORY P2 exprgrade = "0-2"                                                    HISTORY P3 expr = "STATUS==b0"                                                  HISTORY P4 infile = sw00016095019xwtw2po_ufre.evt                               HISTORY P5 outdir = .                                                           HISTORY P6 clobber = no                                                         HISTORY P7 chatter = 3                                                          HISTORY P8 history = yes                                                        HISTORY P9 createattgti = yes                                                   HISTORY P10 createinstrgti = yes                                                HISTORY P11 gtiscreen = yes                                                     HISTORY P12 evtscreen = yes                                                     HISTORY P13 acsscreen = no                                                      HISTORY P14 obsmodescreen = yes                                                 HISTORY P15 mode = hl                                                           HISTORY P16 mkffile = sw00016095019x.mkf                                        HISTORY P17 gtifile = xrtscreen_gti.tmp                                         HISTORY P18 usrgtifile = NONE                                                   HISTORY P19 hkrangefile = CALDB                                                 HISTORY P20 timecol = TIME                                                      HISTORY P21 outfile = ./sw00016095019xwtw2po_cl.evt                             HISTORY P22 gtiext = GTI                                                        HISTORY P23 evtrangefile = CALDB                                                HISTORY P24 cleanup = yes                                                       HISTORY                                                                         HISTORY END PARAMETER list for xrtscreen_0.5.0                                  HISTORY CALDB HKRANGE file : /aps/calibration/caldb_b20171016_xrt20230725_u20201HISTORY 215_clock156/data/swift/xrt/bcf/instrument/swxhkranges6_20010101v011.fitHISTORY s                                                                       HISTORY CALDB EVTRANGE file: /aps/calibration/caldb_b20171016_xrt20230725_u20201HISTORY 215_clock156/data/swift/xrt/bcf/instrument/swxevtrange20010101v002.fits RA_OBJ  =     228.959088071419 / [deg] R.A. Object                              DEC_OBJ =     56.3442138362885 / [deg] Dec Object                               RA_PNT  =     228.959088071419 / [deg] RA pointing                              DEC_PNT =     56.3442138362885 / [deg] Dec pointing                             PA_PNT  =      238.09603729443 / [deg] Position angle (roll)                    CONTENT = 'IMAGE   '           / image file                                     HDUNAME = 'IMAGE   '                                                            RA_NOM  = 2.289590880714200E+02 / Right Ascension of target (deci. deg)         DEC_NOM = 5.634421383628900E+01 / Declination of target (deci. deg)             DROLLANG= 0.000000000000000E+00 / Mean roll angle (deci. deg)                   IMGBIN  =                    1 / Image binning factor                           MTYPE1  = 'SKY     '           / DM Keyword: Descriptor name.                   MFORM1  = 'X,Y     '           / DM Keyword: Descriptor value.                  CTYPE1  = 'RA---TAN'                                                            CRPIX1  = 5.005000000000000E+02 / X axis reference pixel                        DRPIX1  = 5.005000000000000E+02 / original X axis reference pixel               CRVAL1  = 2.289590880714200E+02 / Coord of X ref pixel                          CDELT1  = -6.548089087209000E-04 / X axis increment                             DDELT1  = -6.548089087209000E-04 / original X axis increment                    CTYPE2  = 'DEC--TAN'           / projection                                     CRPIX2  = 5.005000000000000E+02 / Y axis reference pixel                        DRPIX2  = 5.005000000000000E+02 / original Y axis reference pixel               CRVAL2  = 5.634421383628900E+01 / Coord of Y ref pixel                          CDELT2  = 6.548089087209000E-04 / Y axis increment                              DDELT2  = 6.548089087209000E-04 / original Y axis increment                     CROTA2  = 0.000000000000000E+00 / Sky coord rotation angle                      WCSNAMEP= 'PHYSICAL'                                                            WCSTY1P = 'PHYSICAL'                                                            LTV1    = 0.000000000000000E+00 / offset for logical to physical pixel          LTM1_1  = 1.000000000000000E+00 / slope for logical to physical pixel           CTYPE1P = 'X       '           / Source of X-axis                               CRPIX1P = 1.000000000000000E+00 / X axis reference pixel                        CRVAL1P = 1.000000000000000E+00 / coord of X ref pixel in original image        CDELT1P = 1.000000000000000E+00 / X axis increment                              WCSTY2P = 'PHYSICAL'                                                            LTV2    = 0.000000000000000E+00 / offset for logical to physical pixel          LTM2_2  = 1.000000000000000E+00 / slope for logical to physical pixel           CTYPE2P = 'Y       '           / Source of Y-axis                               CRPIX2P = 1.000000000000000E+00 / Y axis reference pixel                        CRVAL2P = 1.000000000000000E+00 / coord of Y ref pixel in original image        CDELT2P = 1.000000000000000E+00 / Y axis increment                              TOTCTS  =                    2 / Total pixel count                              CHANMIN =                    0 / Low PI channel                                 CHANMAX =                 1023 / High PI channel                                CHANTYPE= 'PI      '           / Energy channel name                            HISTORY extractor v5.24                                                         CHECKSUM= 'WAhKa7hIWAhIa5hI'   / HDU checksum updated 2023-10-08T06:43:42       DATASUM = '2       '           / data unit checksum updated 2023-10-08T06:43:18 PROCVER = '3.19.02 '           / Processing script version                      SOFTVER = 'Hea_27Jul2015_V6.17_Swift_Rel4.5(Bld34)_27Jul2015_SDCpatch_19'       CALDBVER= 'b20171016_u20201215_x20230725_m20230918' / CALDB index versions used SEQPNUM =                    5 / Number of times the dataset processed          UTCFINIT=    -32.0922800000000 / [s] UTCF at TSTART                             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  =                    1 / 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     '           / name of this binary table extension            HDUCLASS= 'OGIP    '           / File conforms to OGIP/GSFC conventions         HDUCLAS1= 'GTI     '           / File contains Good Time Intervals              HDUCLAS2= 'STANDARD'           / File contains Good Time Intervals              TELESCOP= 'SWIFT   '           / Telescope (mission) name                       DATAMODE= 'WINDOWED'           / Datamode                                       INSTRUME= 'XRT     '           / Instrument name                                OBJECT  = 'NGC5907ULX-1'       / Object name                                    ONTIME  = 4.109794855117798E+00 / On-source time                                DEADC   =       9.98748839E-01 / Deadtime correction                            DEADAPP =                    F / Has DEADC been applied to data                 EXPOSURE= 4.104652839672340E+00 / Exposure time                                 LIVETIME= 4.104652839672340E+00 / Deadtime corrected on-source time             DATE-OBS= '2023-09-28T20:43:34' / Start date of observations                    DATE-END= '2023-09-28T20:43:39' / End date of observations                      TSTART  = 7.176266198451476E+08 / time start                                    TSTOP   = 7.176266239549425E+08 / time stop                                     TELAPSE = 4.109794855117798E+00 / elapsed time                                  MJD-OBS = 6.021586439848551E+04 / MJD of data start time                        MJDREFI =                51910 / MJD reference day                              MJDREFF = 7.428703700000000E-04 / MJD reference (fraction of day)               TIMEREF = 'LOCAL   '           / reference time                                 TIMESYS = 'TT      '           / time measured from                             TIMEUNIT= 's       '           / unit for time keywords                         EQUINOX =            2.000E+03 / Equinox of celestial coord system              RADECSYS= 'FK5     '           / celestial coord system                         USER    = 'apsop   '           / User name of creator                           FILIN001= 'sw00016095019xwtw2po_cl.evt' / Input file name                       CREATOR = 'extractor v5.24'    / Extractor                                      DATE    = '2023-10-08T06:43:18' / file creation date (YYYY-MM-DDThh:mm:ss UT)   ORIGIN  = 'NASA/GSFC'          / origin of fits file                            HDUNAME = 'GTI     '           / ASCDM block name                               MTYPE1  = 'TIME    '           / Data type                                      MFORM1  = 'START,STOP'         / names of the start and stop columns            METYP1  = 'R       '           / data descriptor type: Range, binned data       CHECKSUM= '92ahB1Uh91ZhA1Zh'   / HDU checksum updated 2023-10-08T06:43:42       DATASUM = '2171678583'         / data unit checksum updated 2023-10-08T06:43:18 PROCVER = '3.19.02 '           / Processing script version                      TIERRELA=               1.0E-8 / [s/s] relative errors expressed as rate        TIERABSO=                  1.0 / [s] timing  precision  in seconds              OBS_ID  = '00016095019'        / Observation ID                                 SEQPNUM =                    5 / Number of times the dataset processed          TARG_ID =                16095 / Target ID                                      SEG_NUM =                   19 / Segment number                                 RA_OBJ  =     228.959088071419 / [deg] R.A. Object                              DEC_OBJ =     56.3442138362885 / [deg] Dec Object                               RA_PNT  =     228.959088071419 / [deg] RA pointing                              DEC_PNT =     56.3442138362885 / [deg] Dec pointing                             PA_PNT  =      238.09603729443 / [deg] Position angle (roll)                    ATTFLAG = '110     '           / Attitude file: 100=sat, x10=pat, xx1=uat       UTCFINIT=    -32.0922800000000 / [s] UTCF at TSTART                             END                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             AÅc}ì-ÌAÅcú;Ž