origin,s,h,"ASC",,,"Source of FITS file"
creator,s,h,"acis_process_events - Version DS10.9",,,"tool that created this output"
ascdsver,s,h,"10.9.4",,,"Processing system revision"
asolfile,s,h,"pcadf03915_000N001_asol1.fits",,,""
thrfile,s,h,"acisD1996-11-01evtspltN0002.fits",,,""
tlmver,s,h,"P015",,,"Telemetry revision number (IP&CL)"
revision,i,h,4,,,"Processing version of data"
checksum,s,h,"DdOCEaLADaLADaLA",,,"HDU checksum updated 2021-04-04T07:50:41"
datasum,s,h,"1194628397",,,"data unit checksum updated 2021-04-04T07:40:14"
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,"2021-04-04T07:36:20",,,"Date and time of file creation"
mjd-obs,r,h,52800.440814541,,,"Modified Julian date of observation"
date-obs,s,h,"2003-06-10T10:34:46",,,"Observation start date"
date-end,s,h,"2003-06-12T06:09:07",,,"Observation end date"
timesys,s,h,"TT",,,"Time system"
mjdref,r,h,50814.0,,,"[d] MJD zero point for times"
timezero,r,h,0.0,,,"[s] Clock correction"
timeunit,s,h,"s",,,"Time unit"
btimnull,r,h,170405141.64944,,,"Basic Time offset (s)"
btimrate,r,h,0.2562500108726,,,"Basic Time clock rate (s / VCDUcount)"
btimdrft,r,h,2.6770252681274e-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,171628486.37638,,,"[s] Observation start time (MET)"
tstop,r,h,171785347.77054,,,"[s] Observation end time (MET)"
obs_mode,s,h,"POINTING",,,"Observation mode"
startmjf,i,h,37281,,,"Major frame ctr value at start of data"
startmnf,i,h,21,,,"Start minor frame ctr at start of data"
startobt,r,h,0.0,,,"On-Board MET close to STARTMJF and STARTMNF"
stopmjf,i,h,42069,,,"Major frame ctr value at stop of data"
stopmnf,i,h,127,,,"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,,,"[s] timedel Lev1"
mission,s,h,"AXAF",,,"Mission"
telescop,s,h,"CHANDRA",,,"Telescope"
sim_x,r,h,-0.68282252473119,,,"[mm] SIM focus pos"
sim_y,r,h,0.0,,,"[mm] SIM orthogonal axis pos"
sim_z,r,h,-182.1344861297,,,"[mm] SIM translation stage pos"
foc_len,r,h,10070.0,,,"[mm] HRMA focal length"
instrume,s,h,"ACIS",,,"Instrument"
grating,s,h,"LETG",,,"Grating"
detnam,s,h,"ACIS-456789",,,"Detector"
ra_pnt,r,h,182.50145712718,,,"[deg] Pointing RA"
dec_pnt,r,h,-52.425454363121,,,"[deg] Pointing Dec"
roll_pnt,r,h,258.15882217024,,,"[deg] Pointing Roll"
ra_targ,r,h,182.503333,,,"[deg] Observer's specified target RA"
dec_targ,r,h,-52.440306,,,"[deg] Observer's specified target Dec"
defocus,r,h,0.0014449365687057,,,"[mm] SIM defocus"
ra_nom,r,h,182.50145712718,,,"[deg] Nominal RA"
dec_nom,r,h,-52.425454363121,,,"[deg] Nominal Dec"
roll_nom,r,h,258.15882217024,,,"[deg] Nominal Roll"
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_ctiN0008.fits",,,""
cti_corr,b,h,yes,,,""
cti_app,s,h,"PPPPPBPBPP",,,""
ctifile,s,h,"acisD2002-08-01ctiN0009.fits",,,""
mtlfile,s,h,"acisf03915_000N004_mtl1.fits",,,""
tgaincor,s,h,"T",,,""
tgainfil,s,h,"acisD2003-05-01t_gainN0008.fits",,,""
grd_file,s,h,"acisD1996-11-01gradeN0004.fits",,,""
corners,i,h,2,,,"num adjacent side pix > threshold to include co"
gradesys,s,h,"ASCA",,,"grade system: ASCA, ACIS, or USER"
bpixfile,s,h,"acisf03915_000N004_bpix1.fits",,,""
datamode,s,h,"CC33_FAINT",,,"Data mode"
run_id,i,h,1,,,"Science run index"
fsw_vers,i,h,30,,,"ACIS flight software version number"
startbep,i,h,1547717748,,,"BEP timer value at TSTART"
stopbep,i,h,41845364,,,"BEP timer value at TSTOP"
histnum,i,h,487,,,""
title,s,h,"FIRST MEASUREMENT OF THE GRAVITATIONAL REDSHIFT AT THE SURFACE OF A NEUTRON STAR",,,"Proposal title"
observer,s,h,"George Pavlov",,,"Principal investigator"
object,s,h,"1E 1207.4-5209",,,"Source name"
ds_ident,s,h,"10.25574/03915",,,"Dataset Identifier: DOI"
obs_id,s,h,"3915",,,"Observation id"
obi_num,i,h,0,,,"Obi number"
seq_num,s,h,"500394",,,"Sequence number"
ontime,r,h,156523.59407449,,,"[s] Sum of GTIs"
ontime7,r,h,156523.59407449,,,"[s] Sum of GTIs"
ontime4,r,h,156120.85868007,,,"[s] Sum of GTIs"
ontime5,r,h,156530.89022255,,,"[s] Sum of GTIs"
ontime6,r,h,156150.0418323,,,"[s] Sum of GTIs"
ontime8,r,h,156166.09263426,,,"[s] Sum of GTIs"
ontime9,r,h,156152.96014974,,,"[s] Sum of GTIs"
livetime,r,h,155912.17378513,,,"[s] Livetime"
livtime7,r,h,155912.17378513,,,"[s] Livetime"
livtime4,r,h,155511.01157585,,,"[s] Livetime"
livtime5,r,h,155919.44143262,,,"[s] Livetime"
livtime6,r,h,155540.08073139,,,"[s] Livetime"
livtime8,r,h,155556.06883491,,,"[s] Livetime"
livtime9,r,h,155542.98764915,,,"[s] Livetime"
exposure,r,h,155912.17378513,,,"[s] Exposure time"
exposur7,r,h,155912.17378513,,,"[s] Exposure time"
exposur4,r,h,155511.01157585,,,"[s] Exposure time"
exposur5,r,h,155919.44143262,,,"[s] Exposure time"
exposur6,r,h,155540.08073139,,,"[s] Exposure time"
exposur8,r,h,155556.06883491,,,"[s] Exposure time"
exposur9,r,h,155542.98764915,,,"[s] Exposure time"
dtcor,r,h,0.99609375,,,"Dead time correction"
time_adj,s,h,"TARGET",,,"time adjustment algorithm"
asptype,s,h,"KALMAN",,,""
biasfil4,s,h,"acisf171628134N004_0_bias0.fits",,,"bias file used: CCD 4"
biasfil7,s,h,"acisf171628134N004_1_bias0.fits",,,"bias file used: CCD 7"
biasfil5,s,h,"acisf171628134N004_2_bias0.fits",,,"bias file used: CCD 5"
biasfil6,s,h,"acisf171628134N004_3_bias0.fits",,,"bias file used: CCD 6"
biasfil8,s,h,"acisf171628134N004_4_bias0.fits",,,"bias file used: CCD 8"
biasfil9,s,h,"acisf171628134N004_5_bias0.fits",,,"bias file used: CCD 9"
fp_temp,r,h,153.4460144,,,"[K] Focal Plane Temperature"
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,"acisf03915_000N004_flt1.fits",,,""
maskfile,s,h,"acisf03915_000N004_msk1.fits",,,""
pbkfile,s,h,"acisf171628297N004_pbk0.fits",,,""
dy_avg,i,h,0,,,"[mm] Mean DY during observation"
dz_avg,i,h,0,,,"[mm] Mean DZ during observation"
dth_avg,i,h,0,,,"[deg] Mean DTHETA during observation"
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,"475689",,,"CCD to FEPID mapping, fep0 is left most digit"
caldbver,s,h,"4.9.4",,,""