--- header unit 0: primary ---
SIMPLE = T / HDU 0
BITPIX = 8 / Number of bits per data pixel
NAXIS = 0 / Number of data axes
EXTEND = T / FITS dataset may include extensions
COMMENT / Configuration control block
ORIGIN = 'ASC'
CREATOR = 'oif'
CHECKSUM = 'W0DMa0BJX0BJa0BJ' / HDU checksum updated 2020-10-26T14:06:06
DATASUM = '0000000000' / Data unit checksum written in ASCII
COMMENT / Time information block-------------------------
DATE = '2020-10-26T14:06:06' / Date and time of file creation (UTC)
DATE-OBS = '2018-01-04T11:33:20' / TT, with clock correction if CLOCKAPP
DATE-END = '2018-01-04T13:31:09' / TT, with clock correction if CLOCKAPP
TIMESYS = 'TT' / AXAF time will be TT (Terrestrial Time)
CLOCKAPP = T / Clock correction applied (if false)
TIMEZERO = 0.000000000000E+00 / Clock correction (if not zero)
TIMEUNIT = 's'
MJDREF = 50814 / 1998-01-01T00:00:00 (TT) expressed in MJD (TT)
TSTART = 6.314528000000E+08 / As in the TIME column: raw space craft clock;
TSTOP = 6.314599000000E+08 / add TIMEZERO and MJDREF for absolute TT
COMMENT / Observation information block
OBS_ID = '20872' / ObsId/Sequence number
SEQ_NUM = '201201' / Sequence number
MISSION = 'AXAF' / Mission is AXAF
TELESCOP = 'CHANDRA' / Telescope is CHANDRA
INSTRUME = 'ACIS' / HRC, ACIS, EPHIN, S/C subsystems
--- header unit 1: binary table ---
XTENSION = 'BINTABLE' / HDU 1==========================================
BITPIX = 8 / 8-bit bytes
NAXIS = 2 / 2-dimensional Binary Table
NAXIS1 = 294 / Number of bytes per row
NAXIS2 = 20 / Number of rows
PCOUNT = 0 / No group parameters (required keyword)
GCOUNT = 1 / One data group (required keyword)
TFIELDS = 12 / Number of columns
EXTNAME = 'GROUPING' / EXTNAME, usually identical to HDUNAME
EXTVER = 1 / EXTVER - sequence number of <EXTNAME> HDU
COMMENT +------------------+
COMMENT | AXAF FITS File |
COMMENT +------------------+
COMMENT *********************************************************
COMMENT > This file is written following certain AXAF-ASC <
COMMENT > conventions which are documented in ASC-FITS-2.0 <
COMMENT *********************************************************
COMMENT / Configuration control block----------------
ORIGIN = 'ASC'
CREATOR = 'oif'
ASCDSVER = '10.9.2' / ASC-DS processing system revision (release)
TLMVER = 'P014' / Telemetry revision number (IP&CL)
REVISION = 1 / Processing version of data
CHECKSUM = 'UDFEV9D9UADCU9D9' / HDU checksum updated 2020-10-26T14:06:06
DATASUM = '244861957''         /Data unit checksum written in ASCII'
CONTENT = 'OIF' / Data product identification
HDUNAME = 'GROUPING' / Dataset name; usually identical to EXTNAME
HDUSPEC = 'ICD OIF 0.0' / ICD reference
HDUDOC = 'ASC-FITS-2.0: Rots, McDowell: ASC FITS File Designers Guide'
HDUVERS = '1.0.0'
HDUCLASS = 'ASC'
HDUCLAS1 = 'GROUPING'
LONGSTRN = 'OGIP 1.0' / The OGIP long string convention may be used.
COMMENT This FITS file may contain long string keyword values that are
COMMENT continued over multiple keywords. This convention uses the '&'
COMMENT character at the end of a string which is then continued
COMMENT on subsequent keywords whose name = 'CONTINUE'.
COMMENT / Time information block-----------------
DATE = '2020-10-26T14:06:06' / file creation date (YYYY-MM-DDThh:mm:ss UT)
DATE-OBS = '2018-01-04T11:33:20' / TT, with clock correction if CLOCKAPP
DATE-END = '2018-01-04T13:31:09' / TT, with clock correction if CLOCKAPP
TIMESYS = 'TT' / AXAF time will be TT (Terrestrial Time)
CLOCKAPP = T / Clock correction applied (if false)
TIMEZERO = 0.000000000000E+00 / Clock correction (if not zero)
TIMEUNIT = 's'
MJDREF = 50814 / 1998-01-01T00:00:00 (TT) expressed in MJD (TT)
TSTART = 6.314528000000E+08 / As in the TIME column: raw space craft clock;
TSTOP = 6.314599000000E+08 / add TIMEZERO and MJDREF for absolute TT
COMMENT / Observation information block----------
NUM_OBIS = 0 / Number of observation intervals included
OBSERVER = 'Lauren Cleeves' / Name of Principal Investigator/Guest Observer
TITLE = 'Characterizing X-ray driven molecular chemistry in a young protopla'
OBS_ID = '20872' / ObsId number
SEQ_NUM = '201201' / Sequence number
MISSION = 'AXAF' / Mission is AXAF
TELESCOP = 'CHANDRA' / Telescope is CHANDRA
INSTRUME = 'ACIS' / HRC, ACIS, EPHIN, S/C subsystems
DETNAM = 'ACIS-7' / Detector name
GRATING = 'NONE' / Grating
OBS_MODE = 'POINTING' / Pointing, slew, raster, or scan
DATAMODE = 'VFAINT' / Datamode (varies only for science instr. data)
SIM_X = -6.828000000000E-01 / Position of SIM in mm
SIM_Y = 0.000000000000E+00
SIM_Z = -1.901000000000E+02
FOC_LEN = 1.007000000000E+04 / Assumed focal length, mm; Level 1 and up
ONTIME = 4.092000000000E+03 / Sum of GTIs
LIVETIME = 4.037000000000E+03 / Ontime multipled by DTCOR
EXPOSURE = 4.037000000000E+03 / Total exposure time, with all known corr. appl.
DTCOR = 9.865046000000E-01 / Dead time correction
DATACLAS = 'OBSERVED' / Data class
OBJECT = 'DM Tau' / Source name
RA_NOM = 6.845170000000E+01 / Nominal pointing right ascension, deg
DEC_NOM = 1.816982000000E+01 / Nominal pointing declination, deg
ROLL_NOM = 2.841000000000E+02 / Nominal roll angle, deg
EQUINOX = 2.000000000000E+03 / J2000.0
RADECSYS = 'ICRS' / Julian coordinate reference frame
COMMENT / Column specification-------------------
TTYPE1 = 'MEMBER_LOCATION' / Relative path to the file
TFORM1 = '128A' / String
TTYPE2 = 'MEMBER_XTENSION' / Value of principal HDU's keyword XTENSION
TFORM2 = '32A' / String
TTYPE3 = 'MEMBER_NAME' / Value of principal HDU's keyword EXTNAME
TFORM3 = '32A' / String
TTYPE4 = 'MEMBER_VERSION' / Value of principal HDU's keyword EXTVER
TFORM4 = '1I' / String
TTYPE5 = 'MEMBER_URI_TYPE' / Member location's URI type (URL)
TFORM5 = '6A' / String
TTYPE6 = 'MEMBER_CONTENT' / Value of principal HDU's keyword CONTENT
TFORM6 = '32A' / String
TTYPE7 = 'MEMBER_TSTART' / Value of principal HDU's keyword TSTART
TFORM7 = '1D' / Double
TTYPE8 = 'MEMBER_TSTOP' / Value of principal HDU's keyword TSTOP
TFORM8 = '1D' / Double
TTYPE9 = 'MEMBER_DATE-OBS' / Value of principal HDU's keyword DATE-OBS
TFORM9 = '20A' / String
TTYPE10 = 'MEMBER_DATE-END' / Value of principal HDU's keyword DATE-END
TFORM10 = '20A' / String
TTYPE11 = 'MEMBER_SIZE' / Size of member file (kB)
TFORM11 = '1J' / Integer
TUNIT11 = 'kbyte' / Units of size
TTYPE12 = 'MEMBER_REVISION' / Value of principal HDU's keyword REVISION
TFORM12 = '1I' / Integer