SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 1 / number of data axes NAXIS1 = 0 / length of data axis 1 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 HISTORY fimgcreate 1.0b at 2013-05-07T14:25:24 DATE = '2013-05-07T14:25:24' / file creation date (YYYY-MM-DDThh:mm:ss UT) INSTRUME= 'XRT ' TSTART = 388741828.190372 TSTOP = 388741828.290372 DATE-OBS= '2013-04-27T07:47:54' DATE-END= '2013-04-27T07:50:25' OBJECT = 'GRB130427a' PROCVER = '3.15.06 ' / Processing script version SOFTVER = 'Hea_07Jun2011_V6.11_Swift_Rel3.8(Bld27)_07Apr2011' / HEASOFT and SwifCALDBVER= 'b20090130_u20111031_x20110725_m20130405' / CALDB index versions used 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 ATTFLAG = '111 ' / Orgin of attitude information UTCFINIT= -10.4883800000000 / [s] UTCF at TSTART CHECKSUM= 'kWmFlVmCkVmCkVmC' / HDU checksum updated 2013-05-07T16:13:43 DATASUM = ' 0' / data unit checksum updated 2013-05-07T16:13:43 END XTENSION= 'IMAGE ' / IMAGE extension BITPIX = 16 / number of bits per data pixel NAXIS = 2 / number of data axes NAXIS1 = 51 / length of data axis 1 NAXIS2 = 51 / length of data axis 2 PCOUNT = 0 / number of random group parameters GCOUNT = 1 / number of random groups MESGNAME= 'XRT_IMAGE' / Name of the message TELESCOP= 'SWIFT ' / Telescope (mission) name INSTRUME= 'XRT ' / Instrument name OBS_ID = '00554620000' / Observation ID TARG_ID = '554620 ' / 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 = '2013-05-07T13:10:08' / file creation date (YYYY-MM-DDThh:mm:ss UT) TSTART = 388741828.190372 / Start time DATE-OBS= '2013-04-27T07:50:25' TSTOP = 388741828.290372 / Stop time DATE-END= '2013-04-27T07:50:25' UTCFINIT= -10.4883800000000 / [s] UTCF at TSTART TRIGGER = 554620 / Trigger Number FRAMENUM= 8534078 / CCD Frame Number HDUCLASS= 'OGIP ' / Format conforms to OGIP standards HDUCLAS1= 'IMAGE ' / Image data HDUCLAS2= 'TOTAL ' / Total data values DATAMODE= 'SHORTIMA' / XRT Mode for this data CTYPE1 = 'RAWX ' / WCS axis type CRPIX1 = 26 / WCS Reference point CDELT1 = 1 / WCS coordinate increment CUNIT1 = 'pixel ' / WCS axis unit CTYPE2 = 'RAWY ' / WCS axis type CRPIX2 = 26 / WCS Reference point CDELT2 = 1 / WCS coordinate increment CUNIT2 = 'pixel ' / WCS axis unit APID = 1250 / Application Process Identifier PACKET1 = T / Data from packet #1 present PACKET2 = T / Data from packet #2 present PACKET3 = T / Data from packet #3 present BLANK = -1 / Null data TELAPSE = 0.100000023841858 / TSTOP - TSTART ONTIME = 0.100000023841858 / Time on target LIVETIME= 0.100000023841858 / ONTIME multipled by DEADC EXPOSURE= 0.100000023841858 / Total exposure, with all known corrections DEADC = 1. / Dead time correction INVGAIN = 8 / Inverse gain (data were divided by this value) RAWXCTRD= 268.465148925781 / [pixel] GRB RAWX coordinates CenTRoiD RAWYCTRD= 276.684204101562 / [pixel] GRB RAWY coordinates CenTRoiD XRA_OBJ = 173.13623046875 / [deg] XRT RA location of GRB or Object XDEC_OBJ= 27.7129421234131 / [deg] XRT DEC location of GRB or Object PA_PNT = 310.396148681641 / [deg] Roll angle from North towards East RAWXCEN = 268 / RAWX CENter image CRVAL1 = 268 / WCS reference value RAWYCEN = 277 / RAWY CENter image CRVAL2 = 277 / WCS reference value STDVCTRD= 7.69494152069092 / STandard DeViation of CenTRoiD MAXSTDV = 12. / MAX STandard DeViation of centroid EVTCTRD = 313 / no. of EVenTs in the CenTRoiD window MINEVENT= 20 / MInimum No. of EVenTs required for centroid P2ITER = 2 / Number of iterations for phase2 algorithm MAXITER = 4 / MAX ITERation for phase2 algorithm CONVDIST= 0. / actual CONVergence DISTance MAXCONV = 0.0625 / MAX CONVergence distance XRTMODE = 2 / XRT MODE for image WAVEFORM= 134 / XRT waveform P1UTCC = -10.48838 / [s] Packet #1 UTC Correction time P1UTCCS = -11 / Packet #1 UTC Correction Seconds P1UTCCSS= 25581 / [2*10**(-5) s] Packet #1 UTC Correction SubSecoPKT1TIME= 388741831.26134 / [s] ccsds PacKeT #1 TIME=PKT1SEC+PKT1SUBS*2e-5 PKT1SEC = 388741831 / ccsds PacKeT #1 SEConds PKT1SUBS= 13067 / [2*10**(-5) s] ccsds PacKeT #1 SUBSeconds CHECKSUM= '5VHaAUFZ7UFaAUFY' / HDU checksum updated 2013-05-07T16:13:43 DATASUM = '101058039' / data unit checksum updated 2013-05-07T13:10:08 FLUXFACT= 570000015360. / Flux conversion factor P2UTCC = -10.48838 / [s] Packet #2 UTC Correction time P2UTCCS = -11 / Packet #2 UTC Correction Seconds P2UTCCSS= 25581 / [2*10**(-5) s] Packet #2 UTC Correction SubSecoPKT2TIME= 388741831.34452 / [s] ccsds PacKeT #2 TIME=PKT2SEC+PKT2SUBS*2e-5 PKT2SEC = 388741831 / ccsds PacKeT #2 SEConds PKT2SUBS= 17226 / [2*10**(-5) s] ccsds PacKeT #2 SUBSeconds BOREROW = 298. / BOREsight ROW in RAWY BORECOL = 295.299987792969 / BOREsight COLumn in RAWX BOREPA = 0. / [deg] BOREsight roll (Position Angle) PLATESCA= 2.3573100566864 / [arcsec/pixel] PLATE SCAle SCYCORR = 0. / [arcsec] Spacecraft to XRT Y boresight corr SCZCORR = 0. / [arcsec] Spacecraft to XRT Z boresight corr SCPACORR= 0. / [deg] Spacecraft to XRT roll boresight corr TAMREFX1= 327.640014648438 / TAM Ref Window 1 X pos TAMREFY1= 237.199996948242 / TAM Ref Window 1 Y pos TAMREFX2= 261.324005126953 / TAM Ref Window 2 X pos TAMREFY2= 242. / TAM Ref Window 2 Y pos TAMTHETA= 17. / TAM THETA-t angle XRT-PSU-037 TAMOPTGN= 1.00999999046326 / TAM OPTical GaiN XRT-LUX-TN-095 TAMPRIPS= 9.49600028991699 / TAM PRImary window Plate Scale TAMSECPS= 5.65999984741211 / TAM SECondary window Plate Scale TAMSEQCN= 67692 / TAM image SEQuence CouNt TAMCTRDC= T / TAM CenTRoiD Calculated? TAMCORR = F / TAM CORRection enabled? NOMEXPO = 0.100000001490116 / [s] NOMinal EXPOsure for flux calculation RA_PNT = 173.145858764648 / [deg] Spacecraft RA DEC_PNT = 27.6873607635498 / [deg] Spacecraft Dec GRBYXRT = -50.2479248046875 / GRB Y in XRT Coords GRBZXRT = -83.0594711303711 / GRB Z in XRT Coords XHIGHRA = 173.13623578942 / [deg] XRT HIGH precision GRB RA (double) XHIGHDEC= 27.7129425028399 / [deg] XRT HIGH precision GRB DEC (double) WINHALFW= 25 / WINdow HALF Width MINSTDV = 5 / MIN STandard DeViation of centroid TLMVER = 3 / Telemetry version from packet #3 P3UTCC = -10.48838 / [s] Packet #3 UTC Correction time P3UTCCS = -11 / Packet #3 UTC Correction Seconds P3UTCCSS= 25581 / [2*10**(-5) s] Packet #3 UTC Correction SubSecoPKT3TIME= 388741831.46396 / [s] ccsds PacKeT #3 TIME=PKT3SEC+PKT3SUBS*2e-5 PKT3SEC = 388741831 / ccsds PacKeT #3 SEConds PKT3SUBS= 23198 / [2*10**(-5) s] ccsds PacKeT #3 SUBSeconds EXTNAME = 'SHT388741828I9' PROCVER = '3.15.06 ' / Processing script version SOFTVER = 'Hea_07Jun2011_V6.11_Swift_Rel3.8(Bld27)_07Apr2011' / HEASOFT and SwifCALDBVER= 'b20090130_u20111031_x20110725_m20130405' / CALDB index versions used ATTFLAG = '111 ' / Orgin of attitude information END           #>%)  d–^'#   ,”o!'  ,"   '