WF/PC-1 Header Keywords
Keyword
|
Description
|
|---|
|
Information about the groups
|
|
GROUPS
|
Multi-group image?
|
|
GCOUNT
|
Number of groups (number of detectors read out)
|
|
Coordinate-related keywords
|
|
CRVAL1
|
RA of reference pixel (deg)
|
|
CRVAL2
|
Declination of reference pixel (deg)
|
|
CRPIX1
|
X coordinate of reference pixel
|
|
CRPIX2
|
Y coordinate of reference pixel
|
|
CD1_1
|
Partial of RA with respect to x
|
|
CD1_2
|
Partial of RA with respect to y
|
|
CD2_1
|
Partial of declination with respect to x
|
|
CD2_2
|
Partial of declination with respect to y
|
|
Image Contents
|
|
ORIENTAT
|
Orientation of image (deg)
|
|
DETECTOR
|
CCD detector: WF 1-4, PC 5-8
|
|
Bias level information (columns 3-14 of the .x0h/.x0d file)
|
|
DEZERO
|
Bias level from EED extended register
|
|
BIASEVEN
|
Bias level based on average of odd columns in x0h/x0d file
|
|
BIASODD
|
Average bias level based on average of even columns
|
|
Pixel statistics
|
|
GOODMIN
|
Minimum value of "good" pixels (not flagged in DQF)
|
|
GOODMAX
|
Maximum value of "good" pixels
|
|
DATAMEAN
|
Mean value of "good" pixels
|
|
GPIXELS
|
Number of good pixels
|
|
Photometry keywords
|
|
PHOTMODE
|
Photometry mode
|
|
PHOTFLAM
|
Inverse sensitivity (units of erg/sec/cm2/Å for 1 DN/sec)
|
|
PHOTZPT
|
Zero point (currently -21.10, if DOPHOTOM = yes)
|
|
PHOTPLAM
|
Pivot wavelength (in angstroms)
|
|
PHOTBW
|
rms bandwidth of filter (in angstroms)
|
|
Image keywords
|
|
INSTRUME
|
Instrument used; always WFPC for either WF or PC
|
|
ROOTNAME
|
Rootname of the observation set
|
|
FILETYPE
|
SHP - standard header packet
EXT - extracted engineering file
EDQ - EED data quality file
SDQ - science data quality file
SCI - science data file
|
|
CAMERA
|
Camera in use: WF (wide-field), PC (planetary)
|
|
MODE
|
Mode: FULL (full resol.) or AREA (2x2 pixel summation)
|
|
SERIALS
|
Serial clocks: ON, OFF
|
|
Data type keywords
|
|
IMAGETYP
|
DARK/BIAS/INTFLAT/KSPOTS
/EXTERNAL/EARTH-CAL
|
|
CDBSFILE
|
GENERIC/BIAS/DARK/PREF/FLAT/MASK/ATOD/NO Is the image a reference file and if yes, type is specified
|
|
Reference file selection keywords
|
|
DATE
|
Date file written (dd/mm/yy)
|
|
FILTNAM1
|
First filter name
|
|
FILTNAM2
|
Second filter name; blank if none
|
|
FILTER1
|
First filter number (0-48) (Historical, but used in SOGS)
|
|
FILTER2
|
Second filter number (0-48)
|
|
PFILTER1
|
Preflash Filter 1 number (0-48); always 1=F122M
|
|
PFILTER2
|
Preflash Filter 2 number (0-48); always 47=F1083N (WF) 35=F1042M (PC)
|
|
SHUTTER
|
Shutter in place during preflash or INTFLAT (A, B, or Unknown)
|
|
Calibration switches
|
|
MASKCORR
|
Do mask correction: YES, NO, DONE
|
|
ATODCORR
|
Do A-to-D correction: YES, NO, DONE
|
|
BLEVCORR
|
Do bias level correction: YES, NO, DONE
|
|
BIASCORR
|
Do bias correction: YES, NO, DONE
|
|
PREFCORR
|
Do preflash correction: YES, NO, DONE
|
|
PURGCORR
|
Do purge correction-always NO
|
|
DARKCORR
|
Do dark correction: YES, NO, DONE
|
|
FLATCORR
|
Do flatfield correction: YES, NO, DONE
|
|
DOSATMAP
|
Output Saturated Pixel Map-always NO
|
|
DOPHOTOM
|
Fill photometry keywords: YES, NO, DONE
|
|
DOHISTOS
|
Make histograms: YES, NO, DONE
|
|
Calibration reference files used1
|
|
MASKFILE
|
Name of the input DQF of known bad pixels
|
|
ATODFILE
|
Name of the A-to-D conversion file
|
|
BLEVFILE
|
Engineering file with extended register data
|
|
BLEVDFIL
|
Engineering file data quality file (DQF) name
|
|
BIASFILE
|
Name of the bias frame reference file
|
|
BIASDFIL
|
Name of the bias frame reference DQF
|
|
PREFFILE
|
Name of the preflash reference file
|
|
PREFDFIL
|
Name of the preflash reference DQF
|
|
PURGFILE
|
Name of the purge reference file (dummy name)
|
|
PURGDFIL
|
Name of the purge reference DQF (dummy name)
|
|
DARKFILE
|
Name of the dark reference file
|
|
DARKDFIL
|
Name of the dark reference DQF
|
|
FLATFILE
|
Name of the flatfield reference file
|
|
FLATDFIL
|
Name of the flatfield reference DQF
|
|
PHOTTAB
|
Name of the photometry calibration table
|
|
SATURATE
|
Data value at which saturation occurs
(always 4095 for WF/PC-1, which includes the bias)
|
|
Ephemeris data
|
|
PA_V3
|
Position angle of V3 axis of HST
|
|
RA_SUN
|
Right ascension of the sun (deg)
|
|
DEC_SUN
|
Declination of the sun (deg)
|
|
EQNX_SUN
|
Equinox of the sun
|
|
Exposure Information
|
|
WEXPODUR
|
Commanded duration of exposure (seconds). For exposures less than 1/2 sec, WEXPODUR is set to 0.
|
|
PREFTIME
|
Predicted preflash time (sec); 30 for WFC and 8 for PC
|
|
DARKTIME
|
Estimate of darktime (in sec)
|
|
FGSLOCK
|
Commanded FGS lock (FINE, COARSE, GYROS, UNKNOWN)
|
|
Timing information
|
|
DATE-OBS
|
UT date of start of observation (dd/mm/yy)
|
|
TIME-OBS
|
UT time of start of observation (hh:mm:ss)
|
|
EXPSTART
|
Exposure start time (Modified Julian Date)
|
|
EXPEND
|
Exposure end time (Modified Julian Date)
|
|
EXPTIME
|
Exposure duration (seconds)
|
|
EXPFLAG
|
How exposure time was calculated. (NORMAL, INTERRUPTED, INCOMPLETE, EXTENDED, UNCERTAIN, INDETERMINATE, or P REDICTED)
|
|
Proposal information
|
|
TARGNAME
|
Proposer's target name
|
|
RA_TARG
|
Right ascension of the target (deg) (J2000)
|
|
DEC_TARG
|
Declination of the target (deg) (J2000)
|