origin,s,h,"ASC",,,"Source of FITS file"
creator,s,h,"acis_process_events - Version DS10.6",,,"tool that created this output"
ascdsver,s,h,"10.6",,,"Processing system revision"
asolfile,s,h,"pcadf618666920N001_asol1.fits",,,""
thrfile,s,h,"acisD2005-07-01evtspltN0002.fits",,,""
tlmver,s,h,"P014",,,"Telemetry revision number (IP&CL)"
revision,i,h,1,,,"Processing version of data"
checksum,s,h,"9EOoJBNl9BNlGBNl",,,"HDU checksum updated 2017-08-10T02:50:37"
datasum,s,h,"4090490798",,,"data unit checksum updated 2017-08-10T02:34:14"
content,s,h,"EVT1",,,"What data product"
hduspec,s,h,"ACIS Telemetry Products: Level 0 to ASC Archive ICD Rev 2.11",,,"ICD r"
hdudoc,s,h,"ASC-FITS-2.0: McDowell, Rots: ASC FITS File Designers Guide",,,""
hduvers,s,h,"1.0.0",,,""
hduclass,s,h,"OGIP",,,""
hduclas1,s,h,"EVENTS",,,""
hduclas2,s,h,"ALL",,,""
pix_adj,s,h,"NONE",,,"Subpixel adjustment algorithm"
rand_sky,r,h,0.0,,,""
subpixfl,s,h,"NONE",,,""
rand_pi,r,h,1.0,,,""
date,s,h,"2017-08-10T02:20:07",,,"Date and time of file creation"
mjd_obs,r,h,57974.48572593,,,"Modified Julian date of observation"
ds_ident,s,h,"ADS/Sa.CXO#obs/19720",,,"dataset identifier"
date-obs,s,h,"2017-08-09T11:39:26",,,"Observation start date"
date-end,s,h,"2017-08-09T19:31:00",,,"Observation end date"
timesys,s,h,"TT",,,"Time system"
mjdref,r,h,50814.0,,,"MJD zero point for times [d]"
timezero,r,h,0.0,,,"Clock correction [s]"
timeunit,s,h,"s",,,"Time unit"
btimnull,r,h,616431231.35242,,,"Basic Time offset (s)"
btimrate,r,h,0.25625001493332,,,"Basic Time clock rate (s / VCDUcount)"
btimdrft,r,h,4.3184900100357e-18,,,"Basic Time clock drift (s / VCDUcount^2)"
btimcorr,r,h,0.0,,,"Correction applied to Basic Time rate (s)"
timeref,s,h,"LOCAL",,,"Time reference (barycenter/local)"
tassign,s,h,"SATELLITE",,,"Time assigned by clock"
clockapp,b,h,yes,,,"default"
tierrela,r,h,1.0e-09,,,"default"
tierabso,r,h,5.0e-05,,,"default"
timversn,s,h,"ASC-FITS-2",,,"Timing system definition"
tstart,r,h,618665966.72031,,,"Observation start time (MET) [s]"
tstop,r,h,618694260.82197,,,"Observation end time (MET) [s]"
obs_mode,s,h,"POINTING",,,"Observation mode"
startmjf,i,h,68152,,,"Major frame ctr value at start of data"
startmnf,i,h,100,,,"Start minor frame ctr at start of data"
startobt,r,h,0.0,,,"On-Board MET close to STARTMJF and STARTMNF"
stopmjf,i,h,68961,,,"Major frame ctr value at stop of data"
stopmnf,i,h,81,,,"Stop minor frame ctr at end of data"
timepixr,r,h,0.5,,,"default"
dataclas,s,h,"OBSERVED",,,"default"
radesys,s,h,"ICRS",,,"default"
timedel,r,h,0.00285,,,"timedel Lev1 [s]"
mission,s,h,"AXAF",,,"Mission"
telescop,s,h,"CHANDRA",,,"Telescope"
sim_x,r,h,-0.68282252473119,,,"SIM focus pos [mm]"
sim_y,r,h,0.0,,,"SIM orthogonal axis pos [mm]"
sim_z,r,h,-190.14258036517,,,"SIM translation stage pos [mm]"
foc_len,r,h,10070.0,,,"HRMA focal length [mm]"
instrume,s,h,"ACIS",,,"Instrument"
grating,s,h,"HETG",,,"Grating"
detnam,s,h,"ACIS-5678",,,"Detector"
ra_pnt,r,h,288.7992063039,,,"Pointing RA [deg]"
dec_pnt,r,h,10.94038482789,,,"Pointing Dec [deg]"
roll_pnt,r,h,229.16870836215,,,"Pointing Roll [deg]"
ra_targ,r,h,288.798333,,,"Observer's specified target RA [deg]"
dec_targ,r,h,10.945778,,,"Observer's specified target Dec [deg]"
defocus,r,h,0.0014449365687057,,,"SIM defocus [mm]"
ra_nom,r,h,288.7992063039,,,"Nominal RA [deg]"
dec_nom,r,h,10.94038482789,,,"Nominal Dec [deg]"
roll_nom,r,h,229.16870836215,,,"Nominal Roll [deg]"
readmode,s,h,"CONTINUOUS",,,"Read mode"
acsys1,s,h,"CHIP:AXAF-ACIS-1.0",,,"reference for chip coord system"
acsys2,s,h,"TDET:ACIS-2.2",,,"reference for tiled detector coord system"
acsys3,s,h,"DET:ASC-FP-1.1",,,"reference for focal plane coord system"
acsys4,s,h,"SKY:ASC-FP-1.1",,,"reference for sky coord system"
gainfile,s,h,"acisD2000-01-29gain_ctiN0005.fits",,,""
cti_corr,b,h,yes,,,""
cti_app,s,h,"PPPPPNPNPP",,,""
ctifile,s,h,"acisD2002-08-01ctiN0005B.fits",,,""
mtlfile,s,h,"acisf19720_000N001_mtl1.fits",,,""
grdimgfl,s,h,"acisD2000-01-29grdimgN0001.fits",,,""
tgaincor,s,h,"T",,,""
tgainfil,s,h,"acisD2016-11-01t_gainN0002.fits",,,""
grd_file,s,h,"acisD1996-11-01gradeN0004.fits",,,""
corners,i,h,1,,,"num adjacent side pix > threshold to include co"
gradesys,s,h,"ASCA",,,"grade system: ASCA, ACIS, or USER"
bpixfile,s,h,"acisf19720_000N001_bpix1.fits",,,""
datamode,s,h,"CC33_GRADED",,,"Data mode"
run_id,i,h,1,,,"Science run index"
fsw_vers,i,h,53,,,"ACIS flight software version number"
startbep,i,h,4078733647,,,"BEP timer value at TSTART"
stopbep,i,h,2397193551,,,"BEP timer value at TSTOP"
fep_id,i,h,1,,,"Front End Processor ID: 0-5"
ccd_id,i,h,7,,,"CCD ID: 0-9"
histnum,i,h,464,,,""
title,s,h,"A Chandra Legacy for GRS 1915+105",,,"Proposal title"
observer,s,h,"Claude Canizares",,,"Principal investigator"
object,s,h,"GRS 1915+105",,,"Source name"
obs_id,s,h,"19720",,,"Observation id"
obi_num,i,h,0,,,"Obi number"
seq_num,s,h,"401887",,,"Sequence number"
ontime,r,h,21883.799848676,,,"Sum of GTIs [s]"
ontime7,r,h,21883.799848676,,,"Sum of GTIs [s]"
ontime5,r,h,26131.490376115,,,"Sum of GTIs [s]"
ontime6,r,h,21797.661765337,,,"Sum of GTIs [s]"
ontime8,r,h,26095.013694167,,,"Sum of GTIs [s]"
livetime,r,h,21798.316255517,,,"Livetime [s]"
livtime7,r,h,21798.316255517,,,"Livetime [s]"
livtime5,r,h,26029.414241833,,,"Livetime [s]"
livtime6,r,h,21712.514649066,,,"Livetime [s]"
livtime8,r,h,25993.080046924,,,"Livetime [s]"
exposure,r,h,21798.316255517,,,"Exposure time [s]"
exposur7,r,h,21798.316255517,,,"Exposure time [s]"
exposur5,r,h,26029.414241833,,,"Exposure time [s]"
exposur6,r,h,21712.514649066,,,"Exposure time [s]"
exposur8,r,h,25993.080046924,,,"Exposure time [s]"
dtcor,r,h,0.99609375,,,"Dead time correction"
time_adj,s,h,"TARGET",,,"time adjustment algorithm"
asptype,s,h,"KALMAN",,,""
fp_temp,r,h,159.41957092,,,"Focal Plane Temperature [K]"
aimpfile,s,h,"telD1999-07-23aimptsN0002.fits",,,""
geomfile,s,h,"telD1999-07-23geomN0006.fits",,,""
skyfile,s,h,"telD1999-07-23skyN0002.fits",,,""
tdetfile,s,h,"telD1999-07-23tdetN0001.fits",,,""
shellfil,s,h,"telD1999-07-23sgeomN0001.fits",,,""
fltfile,s,h,"acisf19720_000N001_flt1.fits",,,""
maskfile,s,h,"acisf19720_000N001_msk1.fits",,,""
pbkfile,s,h,"acisf618666942N001_pbk0.fits",,,""
dy_avg,r,h,0.82474082204,,,"Mean DY during observation [mm]"
dz_avg,r,h,0.91587765385,,,"Mean DZ during observation [mm]"
dth_avg,r,h,-0.0043939585136,,,"Mean DTHETA during observation [deg]"
oclkpair,i,h,8,,,"# of pairs of overclock pixels per output"
orc_mode,i,h,0,,,"Output register clocking mode"
sum_2x2,i,h,0,,,"On-chip summing. 0:None; 1:Sum 2x2"
fep_ccd,s,h,"x7568x",,,"CCD to FEPID mapping, fep0 is left most digit"
caldbver,s,h,"4.7.5",,,""