origin,s,h,"ASC",,,"Source of FITS file"
creator,s,h,"acis_process_events - Version DS10.12",,,"tool that created this outpu"
ascdsver,s,h,"10.12.2",,,"Processing system revision"
asolfile,s,h,"pcadf29059_000N001_asol1.fits",,,""
thrfile,s,h,"acisD2005-07-01evtspltN0002.fits",,,""
tlmver,s,h,"P016",,,"Telemetry revision number (IP&CL)"
revision,i,h,1,,,"Processing version of data"
checksum,s,h,"UY4HaY2FWY2FaY2F",,,"HDU checksum updated 2023-11-23T15:39:59"
datasum,s,h,"223562787",,,"data unit checksum updated 2023-11-23T15:37:49"
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"
chkvfpha,b,h,no,,,"Checked very faint pha"
asptype,s,h,"KALMAN",,,""
rand_sky,r,h,0.0,,,""
subpixfl,s,h,"NONE",,,""
rand_pi,r,h,1.0,,,""
date,s,h,"2023-11-23T15:36:17",,,"Date and time of file creation"
mjd-obs,r,h,60270.828109966,,,"Modified Julian date of observation"
date-obs,s,h,"2023-11-22T19:52:28",,,"Observation start date"
date-end,s,h,"2023-11-23T01:40:45",,,"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,814486911.12205,,,"Basic Time offset (s)"
btimrate,r,h,0.25625001650312,,,"Basic Time clock rate (s / VCDUcount)"
btimdrft,r,h,2.4436313753799e-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,817069948.70103,,,"[s] Observation start time (MET)"
tstop,r,h,817090845.88988,,,"[s] Observation end time (MET)"
obs_mode,s,h,"POINTING",,,"Observation mode"
startmjf,i,h,78772,,,"Major frame ctr value at start of data"
startmnf,i,h,57,,,"Start minor frame ctr at start of data"
startobt,r,h,0.0,,,"On-Board MET close to STARTMJF and STARTMNF"
stopmjf,i,h,79361,,,"Major frame ctr value at stop of data"
stopmnf,i,h,96,,,"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,-183.98502219165,,,"[mm] SIM translation stage pos"
foc_len,r,h,10070.0,,,"[mm] HRMA focal length"
instrume,s,h,"ACIS",,,"Instrument"
grating,s,h,"HETG",,,"Grating"
detnam,s,h,"ACIS-5678",,,"Detector"
ra_pnt,r,h,308.10431557757,,,"[deg] Pointing RA"
dec_pnt,r,h,40.959846937124,,,"[deg] Pointing Dec"
roll_pnt,r,h,293.43476976136,,,"[deg] Pointing Roll"
ra_targ,r,h,308.107417,,,"[deg] Observer's specified target RA"
dec_targ,r,h,40.957761,,,"[deg] Observer's specified target Dec"
defocus,r,h,0.0014449365687057,,,"[mm] SIM defocus"
ra_nom,r,h,308.10431557757,,,"[deg] Nominal RA"
dec_nom,r,h,40.959846937124,,,"[deg] Nominal Dec"
roll_nom,r,h,293.43476976136,,,"[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,"acisD2020-01-01ctiN0009.fits",,,""
mtlfile,s,h,"acisf29059_000N001_mtl1.fits",,,""
tgaincor,s,h,"T",,,""
tgainfil,s,h,"acisD2022-08-02t_gain_biN0002.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,"acisf29059_000N001_bpix1.fits",,,""
datamode,s,h,"CC33_FAINT",,,"Data mode"
run_id,i,h,1,,,"Science run index"
fsw_vers,i,h,60,,,"ACIS flight software version number"
startbep,i,h,1800281797,,,"BEP timer value at TSTART"
stopbep,i,h,3702786757,,,"BEP timer value at TSTOP"
histnum,i,h,488,,,""
title,s,h,"Chandra/IXPE DDT Observations of Cygnus X-3",,,"Proposal title"
observer,s,h,"Michael McCollough",,,"Principal investigator"
object,s,h,"Cyg X-3",,,"Source name"
ds_ident,s,h,"10.25574/29059",,,"Dataset Identifier: DOI"
obs_id,s,h,"29059",,,"Observation id"
obi_num,i,h,0,,,"Obi number"
seq_num,s,h,"402522",,,"Sequence number"
ontime,r,h,19021.86698544,,,"[s] Sum of GTIs"
ontime7,r,h,19021.86698544,,,"[s] Sum of GTIs"
ontime5,r,h,19021.867032051,,,"[s] Sum of GTIs"
ontime6,r,h,19021.867018104,,,"[s] Sum of GTIs"
ontime8,r,h,19021.866971016,,,"[s] Sum of GTIs"
livetime,r,h,18947.562817528,,,"[s] Livetime"
livtime7,r,h,18947.562817528,,,"[s] Livetime"
livtime5,r,h,18947.562863957,,,"[s] Livetime"
livtime6,r,h,18947.562850064,,,"[s] Livetime"
livtime8,r,h,18947.56280316,,,"[s] Livetime"
exposure,r,h,18947.562817528,,,"[s] Exposure time"
exposur7,r,h,18947.562817528,,,"[s] Exposure time"
exposur5,r,h,18947.562863957,,,"[s] Exposure time"
exposur6,r,h,18947.562850064,,,"[s] Exposure time"
exposur8,r,h,18947.56280316,,,"[s] Exposure time"
dtcor,r,h,0.99609375,,,"Dead time correction"
time_adj,s,h,"TARGET",,,"time adjustment algorithm"
biasfil7,s,h,"acisf817070765N001_1_bias0.fits",,,"bias file used: CCD 7"
biasfil5,s,h,"acisf817070765N001_2_bias0.fits",,,"bias file used: CCD 5"
biasfil6,s,h,"acisf817070765N001_3_bias0.fits",,,"bias file used: CCD 6"
biasfil8,s,h,"acisf817070765N001_4_bias0.fits",,,"bias file used: CCD 8"
fp_temp,r,h,162.00831604,,,"[K] Focal Plane Temperature"
aimpfile,s,h,"telD1999-07-23aimptsN0002.fits",,,""
geomfile,s,h,"telD1999-07-23geomN0007.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,"acisf29059_000N001_flt1.fits",,,""
maskfile,s,h,"acisf29059_000N001_msk1.fits",,,""
pbkfile,s,h,"acisf817070947N001_pbk0.fits",,,""
dy_avg,r,h,0.0,,,"[mm] Mean DY during observation"
dz_avg,r,h,0.0,,,"[mm] Mean DZ during observation"
dth_avg,r,h,0.0,,,"[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,"x7568x",,,"CCD to FEPID mapping, fep0 is left most digit"
caldbver,s,h,"4.10.8",,,""