| KEYWORD |
DESCRIPTION |
| SIMPLE |
data conform to FITS standard (T/F) |
| BITPIX |
bits per data value |
| NAXIS |
number of data axes |
| EXTEND |
file may contain standard extensions (T/F) |
| NEXTEND |
number of standard extensions |
| GROUPS |
image is in group format? (T/F) |
| DATE |
date this file was written (yyyy-mm-dd) |
| FILENAME |
name of file |
| FILETYPE |
type of data found in data file |
| TELESCOP |
telescope used to acquire data |
| INSTRUME |
identifier for instrument used to acquire data |
| EQUINOX |
equinox of celestial coordinate system |
| DATA DESCRIPTION KEYWORDS (All Detectors) |
| ROOTNAME |
rootname of the observation set |
| IMAGETYP |
type of exposure identifier |
| PRIMESI |
instrument designated as prime |
| TARGET INFORMATION (All Detectors) |
| TARGNAME |
proposer's target name |
| RA_TARG |
right ascension of the target (deg) (J2000) |
| DEC_TARG |
declination of the target (deg) (J2000) |
| PROPOSAL INFORMATION (All Detectors) |
| PROPOSID |
PEP proposal identifier |
| LINENUM |
proposal log line number |
| PR_INV_L |
last name of principal investigator |
| PR_INV_F |
first name of principal investigator |
| PR_INV_M |
middle name / initial of principal investigator |
| EXPOSURE INFORMATION (All Detectors) |
| SUNANGLE |
angle between sun and V1 axis |
| MOONANGL |
angle between moon and V1 axis |
| SUN_ALT |
altitude of the sun above Earth's limb |
| FGSLOCK |
commanded FGS lock (fine, coarse, gyros, unknown) |
| TWOGYRO |
observation scheduled with only two gyros? (Y/N) |
| DATE-OBS |
UT date of start of observation (yyyy-mm-dd) |
| 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)--calculated |
| EXPFLAG |
exposure interruption indicator |
| POINTING INFORMATION (All Detectors) |
| PA_V3 |
position angle of V3-axis of HST (deg) |
| TARGET OFFSETS (POSTARGS) (All Detectors) |
| POSTARG1 |
POSTARG in axis 1 direction |
| POSTARG2 |
POSTARG in axis 2 direction |
| DIAGNOSTIC KEYWORDS (All Detectors) |
| OPUS_VER |
OPUS software system version number |
| CAL_VER |
CALACS code version |
| PROCTIME |
pipeline processing time (MJD) |
| SCIENCE INSTRUMENT CONFIGURATION (All Detectors) |
| OBSTYPE |
observation type (imaging, spectroscopic, coronagraphic) |
| OBSMODE |
operating mode |
| CTEIMAGE |
type of charge transfer image, if applicable |
| SCLAMP |
lamp status: NONE or name of lamp which is on |
| NRPTEXP |
number of repeat exposures in set (default=1) |
| SUBARRAY |
data from a subarray (T) or full frame (F) |
| DETECTOR |
detector in use: WFC, HRC or SBC |
| FILTER1 |
element selected from filter wheel 1 |
| FILTER2 |
element selected from filter wheel 2 |
| FWOFFSET |
computed filter wheel offset (0, +1, -1) |
| FWERROR |
filter wheel position error flag (T, F) |
| LRFWAVE |
proposed linear ramp filter wavelength |
| APERTURE |
aperture name |
| PROPAPER |
proposed aperture name |
| DIRIMAGE |
direct image for grism or prism exposure |
| CTEDIR |
CTE measurement direction: serial or parallel |
| CRSPLIT |
number of cosmic ray split exposures |
| MAMA OFFSETS (SBC Only) |
| MOFFSET1 |
axis 1 MAMA offset |
| MOFFSET2 |
axis 2 MAMA offset |
| LOCAL RATE CHECK IMAGE (SBC Only) |
| LRC_XSTS |
local rate check image exists (T/F) |
| LRC_FAIL |
local rate check failed (T/F) |
| CALIBRATION SWITCHES: PERFORM, OMIT (All Detectors) |
| STATFLAG |
calculate statistics? (T/F) |
| WRTERR |
write out error array extension? (T/F) |
| DQICORR |
data quality initialization? |
| ATODCORR |
correct for A to D conversion errors? |
| BLEVCORR |
subtract bias level computed from overscan image? |
| BIASCORR |
subtract bias image? |
| FLSHCORR |
subtract post flash image? |
| CRCORR |
combine observations to reject cosmic-rays? |
| EXPSCORR |
process individual observations after cr-reject? |
| SHADCORR |
apply shutter shading correction? |
| GLINCORR |
correct for global detector non-linearities? (SBC only) |
| LFLGCORR |
flag pixels for local and global nonlinearities? (SBC only) |
| DARKCORR |
subtract dark image? |
| FLATCORR |
apply flat field correction? |
| PHOTCORR |
populate photometric header keywords? |
| RPTCORR |
add individual repeat observations? |
| DRIZCORR |
drizzle-combine dithered images? |
| CALIBRATION REFERENCE FILES (All Detectors) |
| BPIXTAB |
bad pixel table |
| CCDTAB |
CCD calibration parameter table |
| ATODTAB |
analog-to-digital correction file |
| OSCNTAB |
CCD overscan table |
| BIASFILE |
bias image file name |
| FLSHFILE |
post flash image file name |
| CRREJTAB |
cosmic-ray rejection parameter table |
| SHADFILE |
shutter shading correction file |
| MLINTAB |
MAMA linearity correction table (SBC only) |
| DARKFILE |
dark image file name |
| PFLTFILE |
pixel-to-pixel flat field file name |
| DFLTFILE |
delta-flat field file name |
| LFLTFILE |
low order flat |
| CFLTFILE |
Coronagraphic Spot Flat |
| SPOTTAB |
Table with Coronagraphic Spot Position versus Date |
| PHOTTAB |
photometric throughput table (not used) |
| GRAPHTAB |
HST graph table |
| COMPTAB |
HST components table |
| IDCTAB |
image distortion correction table |
| DGEOFILE |
distortion correction image |
| MDRIZTAB |
MultiDrizzle parameter table |
| COSMIC RAY REJECTION ALGORITHM PARAMETERS (WFC, HRC, HRC ACQ) |
| MEANEXP |
reference exposure time |
| SCALENSE |
multiplicative scale factor applied to noise |
| INITGUES |
initial guess method (min, med) |
| SKYSUB |
sky value subtracted (mode, none) |
| SKYSUM |
sky level from the sum of all constituent images |
| CRSIGMAS |
statistical rejection criteria |
| CRRADIUS |
rejection propagation radius (pixels) |
| CRTHRESH |
rejection propagation threshold |
| BADINPDQ |
data quality flag used for rejection |
| REJ_RATE |
rate at which pixels are affected by cosmic rays |
| CRMASK |
flag CR-rejected pixels in input files? (T/F) |
| MDRIZSKY |
sky value computed by MultiDrizzle |
| PATTERN KEYWORDS (WFC, HRC, SBC) |
| PATTERN1 |
primary pattern type |
| P1_SHAPE |
primary pattern shape |
| P1_PURPS |
primary pattern purpose |
| P1_NPTS |
number of points in primary pattern |
| P1_PSPAC |
point spacing for primary pattern (arcsec) |
| P1_LSPAC |
line spacing for primary pattern (arcsec) |
| P1_ANGLE |
angle between sides of parallelogram patt (deg) |
| P1_FRAME |
coordinate frame of primary pattern |
| P1_ORINT |
orientation of pattern to coordinate frame (deg) |
| P1_CENTR |
center pattern relative to pointing (yes/no) |
| PATTSTEP |
position number of this point in the pattern |
| POST FLASH PARAMETERS (WFC, HRC, HRC ACQ) |
| FLASHDUR |
exposure time in seconds: 0.1 to 409.5 |
| FLASHCUR |
post-flash current (off, low, med, high) |
| FLASHSTA |
status (successful, aborted, not performed) |
| SHUTRPOS |
shutter position (A or B) |
| ENGINEERING PARAMETERS (WFC, HRC, HRC ACQ) |
| CCDAMP |
CCD amplifier read out configuration |
| CCDGAIN |
commanded gain of CCD (electrons/DN) |
| CCDOFSTA |
commanded CCD bias offset for amplifier A (electrons) |
| CCDOFSTB |
commanded CCD bias offset for amplifier B (electrons) |
| CCDOFSTC |
commanded CCD bias offset for amplifier C (electrons) |
| CCDOFSTD |
commanded CCD bias offset for amplifier D (electrons) |
| CALIBRATED ENGINEERING PARAMETERS (WFC, HRC, HRC ACQ) |
| ATODGNA |
calibrated gain for CCD amplifier A (electrons/DN) |
| ATODGNB |
calibrated gain for CCD amplifier B (electrons/DN) |
| ATODGNC |
calibrated gain for CCD amplifier C (electrons/DN) |
| ATODGND |
calibrated gain for CCD amplifier D (electrons/DN) |
| READNSEA |
calibrated read noise for amplifier A (electrons) |
| READNSEB |
calibrated read noise for amplifier B (electrons) |
| READNSEC |
calibrated read noise for amplifier C (electrons) |
| READNSED |
calibrated read noise for amplifier D (electrons) |
| BIASLEVA |
bias level for amplifier A (electrons) |
| BIASLEVB |
bias level for amplifier B (electrons) |
| BIASLEVC |
bias level for amplifier C (electrons) |
| BIASLEVD |
bias level for amplifier D (electrons) |
| TARGET ACQUISITION PARAMETERS (HRC only) |
| ACQTYPE |
type of acquisition |
| ACQNAME |
rootname of acquisition exposure |
| TARGET ACQUISITION PARAMETERS (HRC ACQ only) |
| ACQTYPE |
type of acquisition |
| CENTMETH |
target acquisition centering method |
| CRELIM |
perform cosmic ray rejection in acquisition |
| CCDBIASS |
CCD bias subtracted from target acq image? (y/n) |
| BIASLEV |
CCD bias level used to process acquisition exp. |
| CHECKBOX |
size of checkbox for finding algorithms |
| TARGAREA |
area of target (detector pixels) |
| ASSOCIATION KEYWORDS (All Detectors) |
| ASN_ID |
unique identifier assigned to association |
| ASN_TAB |
name of association table |
| ASN_MTYP |
role of exposure in association |
