ABFREQ (native-keyword, mosaic only)
The antiblooming frequency. If antiblooming is enabled, charge will be rocked back and forth between the parallel phases of the CCD at this frequency during an integration.
Type = integer
Unit = hertz
ACPOWER (native-keyword)
Is the there AC power?
Type = string
Unit = boolean
AIRMASS (native-keyword)
Air mass of the target being observed
Type = float
Unit = n/a
AIRPRESS (native-keyword)
Atmospheric pressure as measured by a sensor inside the HIRES enclosure
Type = real
Unit = mbar
AMPLIST (native-keyword)
Array describing readout pixel stream from multiple CCD amplifiers. HIRES mosaic has 4 elements for each possible amp on Tek-like CCDs. Amp numbering is 1= top L,2= top R,3= bot L,4= bot R. Only 1 & 2 valid for 2-amp devices.
Type = string
Unit = n/a
Examples
AMPMODE (native-keyword, mosaic only)
Tells whether the mosaic is in single or dual amp readout mode and which amp if single. This is used to determine which data the CCD crate will ship to lickserv.
Type = string
Unit = n/a
Examples
AMPPSIZE (native-keyword, mosaic only)
The unbinned region of physical pixels accessible to this amplifier for this readout in IRAF section notation.
Type = string
Unit = pixels
ANTIBLM (native-keyword, mosaic only)
Determines whether antiblooming clocking will be used.
Type = string
Unit = boolean
AUTOSHUT (native-keyword)
Set to true to open shutter at start of integration.
Type = string
Unit = boolean
AZ (native-keyword)
Telescope azimuth
Type = real
Unit = degrees
BCCVCLOS (native-keyword)
Is the blue collimator cover closed?
Type = string
Unit = boolean
BCCVOPEN (native-keyword)
Is the blue collimator cover open?
Type = string
Unit = boolean
BINNING (native-keyword)
The amount of on-chip binning to be performed along each readout axis of a CCD.
Type = string
Unit = pixels
Examples
BITPIX (native-keyword, mosaic only)
The BITPIX absolute value is used in computing the sizes of data structures. It shall specify the number of bits that represent a data value.
Valid values are -32 (32-bit IEEE single precision), -64 (64-bit IEEE double precision), 16 (signed 16-bit 2s complement integers), 32 (signed 32-bit 2s complement integers) and 8 (unsigned 8-bit 2s complement integers)
Type = integer
Unit = bits
BSCALE (native-keyword)
Default scaling factor
BZERO (native-keyword)
Offset data
C1CVCLOS (native-keyword)
Is the corrector1 cover closed?
Type = string
Unit = boolean
C1CVOPEN (native-keyword)
Is the corrector1 cover open?
Type = string
Unit = boolean
C2CVCLOS (native-keyword)
Is the corrector2 cover closed?
Type = string
Unit = boolean
C2CVOPEN (native-keyword)
Is the corrector2 cover open?
Type = string
Unit = boolean
CACVCLOS (native-keyword)
Is the camera cover closed?
Type = string
Unit = boolean
CACVOPEN (native-keyword)
Is the camera cover open?
Type = string
Unit = boolean
CAFCAL (native-keyword)
Is the camera focus calibration complete?
Type = string
Unit = n/a
Examples
CAFCON (native-keyword)
Camera focus control
Type = string
Unit = n/a
Examples
CAFNAME (native-keyword)
Camera focus name
Type = string
Unit = n/a
Examples
CAFOCUS (native-keyword)
Camera focus location
Type = real
Unit = um
CAFRAW (native-keyword)
Camera focus raw position
Type = integer
Unit = encoder counts
CAMCON (native-keyword)
Camera cover control
Type = string
Unit = n/a
Example
CATCUR1 (native-keyword)
Cathode1 current
Type = real
Unit = mA
CATCUR2 (native-keyword)
Cathode2 current
Type = real
Unit = mA
CATON (native-keyword)
Cathode power control
Type = string
Unit = n/a
Examples
CCDGAIN (native-keyword)
CCD gain used, high gain is 2x low gain.
Type = string
Unit = n/a
Examples
CCDSPEED (native-keyword, mosaic only)
CCD readout speed. Normal speed is the default. Fast speed provides rapid readout without concern for CTE or readout noise. Slow speed provides lowest readout noise at expense of readout time.
Type = string
Unit - n/a
Examples
CCDSUM (native-keyword, mosaic only)
This is a new keyword for the HIRES mosaic
?
CHECKSUM (native-keyword, mosaic only)
Checksum of header
COFCAL (native-keyword)
Is the collimator focus calibrated?
Type = string
Unit = n/a
Examples
COFCON (native-keyword)
collimator focus control
Type = string
Unit = n/a
Examples
COFNAME (native-keyword)
Collimator focus name
Type = string
Unit = n/a
Examples
COFOCUS (native-keyword)
Collimator focus location
Type = real
Unit = um
COFRAW (native-keyword)
Collimator focus raw position
Type = integer
Unit = encoder counts
COLLBLUE (native-keyword)
Is the blue collimator selected?
Type = string
Unit = n/a
Examples
COLLBRAK (native-keyword) Collimator brake Type = string Unit = n/a Examples
COLLCON (native-keyword) Collimator control Type = string Unit = n/a Examples
COLLRED (native-keyword) Is the red collimator selected? Type = string Unit = n/a Examples
COOLFLOW (native-keyword) External coolant flow Type = string Unit = n/a Examples
DARKCLOS (native-keyword) Is the dark slide closed? Type = string Unit = boolean
DARKOPEN (native-keyword) Is the dark slide open? Type = string Unit = boolean
DARKTIME (native-keyword, mosaic only) Time between end of CCD erase sequence and beginning of CCD readout. This is the value that should be used for dark current correction. Type = real Unit = seconds
DATASUM (native-keyword, mosaic only) Data unit checksum
DATE (native-keyword, mosaic only) The value field shall contain a character string giving the date on which the HDU was created, in the form DD/MM/YY Type = string Unit = date
DATE-OBS (native-keyword) Universal date of observation. Type = string Unit = date Example: YYYY-MM-DD
DATE_BEG (native-keyword, mosaic only) Unix system date and time when watch_ccd received message (i.e., sometime later) indicating shutter was commanded to open for the first time after erase. This is accurate to 1 s, and it is not guaranteed to be UTC. Type = datetime Unit = time
DATE_END (native-keyword) Unix system date and time when watch_ccd received message (i.e., sometime later) indicating shutter was commanded to close for the last time before readout. This is accurate to 1 s, and it is not guaranteed to be UTC. Type = datetime Unit = time
DCSSTAT (native-keyword) This is the overall drive and control system (DCS) status. It indicates the worst status (maximized severity) of AXESTAT, SECSTAT, DOMESTAT and whichever is appropriate of ROTSTAT or TERTSTAT. Type = string Unit = n/a Examples
DEC (native-keyword) Current declination measured in the coordinate frame specified by FRAME (FK4, FK5 or apparent) and at the epoch of mean equinox and equator specified by EQUINOX Type = string Unit = sexagesimal degree Type = string Unit = year
DECKCAL (native-keyword) Is the decker calibrated? Type = string Unit = n/a Examples
DECKCON (native-keyword) Decker control Type = string Unit = n/a Examples
DECKLOC (native-keyword) Decker location Type = real Unit = mm
DECKNAME (native-keyword) HIRES decker name. Type = string Unit = n/a
DECKRAW (native-keyword) Decker raw position Type = integer Unit = encoder counts
DETCNFID (native-keyword, mosaic only) The detector mosaic configuration id which is sent from the CCD controller to lickserv2 to identify the source of the image. Type = integer Unit = n/a
DETECTOR (native-keyword) A character string describing the detector used to collect the data. Type = string Unit = n/a
DETLSIZE (native-keyword, mosaic only) Unbinned size of ideal layout of entire mosaic in IRAF section notation Type = string Unit = pixels
DOMESTAT (native-keyword) The current dome status Type = string Unit = n/a Examples
DOOR (native-keyword) Is the door open or closed? Type = string Unit = boolean
DWRN2LV (native-keyword) Liquid nitrogen level in dewar. Type = real Unit = %
ECHANGL (native-keyword) The difference between the current angular position of the HIRES echelle and its 'on-blaze' position. Positive values put redder light onto the detector. Type = real Unit = degrees
ECHCAL (native-keyword) Is the echelle calibrated? Type = string Unit = n/a Examples
ECHCON (native-keyword) Echelle control Type = string Unit = n/a Examples
ECHNAME (native-keyword) Echelle name. Type = string Unit = n/a Examples
ECHPIX (native-keyword) A variant on ECHANGL. The number of pixels by which the echelle blaze in a HIRES image is displaced from the center of the detector. Type = real Unit = pixels
ECHRAW (native-keyword) Echelle raw position Type = integer Unit = encoder counts
ECOVCLOS (native-keyword) Is the echelle cover closed? Type = string Unit = boolean
ECOVOPEN (native-keyword) Is the echelle cover open? Type = string Unit = boolean
EL (native-keyword) Telescope elevation angle Type = real Unit = degrees
ELAPTIME (native-keyword) Elapsed time of the exposure. This is the time between command of shutter open and command of shutter close, and there may be a very rough correction for shutter motion. EXPTIME should be used whenever available. Type = integer Unit = seconds
EQUINOX (native-keyword) The value field shall contain a floating point number giving the equinox in years for the celestial coordinate system in which positions given in either the header or data are expressed. Type = float Unit = year
ERAMODE (native-keyword, mosaic only) A bitmask indicating which of the amplifiers in the mosaic was erased. This may be all, any, or none of the CCDs. This documents how a mosaic exposure can integrate longer on some CCDs than on others. Its value is the previous value of MOSMODE. Type = string Unit = n/a Examples
ERASECNT (native-keyword) Number of erase cycles to perform prior to start of exposure. This is the number of times the entire chip is flushed out through the serial register. Type = integer Unit = erase cycles
ERASLINE (native-keyword) A Caltech convention for saving overscan rows of CCD readout. For mosaic detectors it svalue is ignored and is effectively always false. Type = string Unit = n/a
EXM0DOVF (native-keyword) Number of overflow samples for the EXMODSUM value. Type = integer Unit = samples
EXM0DSUM (native-keyword) Sum of dark counts from exposure meter #0 since the exposure began. Type = integer Unit = pmt counts
EXM0FWMP (native-keyword) Flux weighted midpoint of an EXMO exposure. Type = integer Unit = seconds
EXM0LOVF (native-keyword) Number of overflow samples for the EXMOLSUM value. Type = integer Unit = samples
EXM0LSUM (native-keyword) Sum of light counts from exposure meter #0 since the exposure began. Type = integer Unit = pmt counts
EXM0MIDP (native-keyword) Geometric midpoint of an exposure. Type = integer Unit = seconds
EXM0MOD (native-keyword) Exposure meter #0 exposure control mode. If set to AUTO, CCD exposure will be stopped as soon as the integrated PMT signal (EXM0SSUM) is >= the exposure meter target (EXM0TARG). Type = string Unit = n/a
EXM0SSUM (native-keyword) Sum of exposure signal fromexposure meter #0since the exposure began. Type = integer Unit = pmt counts
EXM0STA (native-keyword) Exposure meter #0 status. Type = string Unit = n/a Examples Sampling error
EXM0TARG (native-keyword) Exposure meter #0 target for exposure cutoff. Type = integer Unit = pmt counts
EXM0TOVF (native-keyword) Number of total overflow samples taken during the exposure. Type = integer Unit = samples
EXPOSURE (native-keyword) For observations written by lickserv this keyword occurs in the output FITS file with a value identical to that of TTIME. It is a courtesy keyword for compatibility of existing practice at Lick Observatory. N.B.: It should not be used; see TTIME. Type = integer Unit = seconds
EXPTIME (native-keyword) nterval during which the shutter was open. This is the best estimate based on measurements of the shutter operation. It is by far better than ELAPTIME (N.B.: TTIME and EXPOSURE should never be used for this). Type = real Unit = seconds
EXTEND (native-keyword) True if the FITS dataset contains extensions Type = string Unit = boolean
FIL1CAL (native-keyword) Is filter1 calibrated? Type = string Unit = n/a Examples
FIL1CON (native-keyword) Filter1 control Type = string Unit = n/a Examples
FIL1NAME (native-keyword) Name of filter1 Type = string Unit = n/a
FIL1POS (native-keyword) Filter1 discrete position in of 12 Type = integer Unit = n/a
FIL1RAW (native-keyword) Filter1 raw position Type = integer Unit = encoder counts
FIL2CAL (native-keyword) Is filter2 calibrated? Type = string Unit = n/a Examples
FIL2CON (native-keyword) Filter2 control Type = string Unit = n/a Examples
FIL2NAME (native-keyword) Name of filter2 Type = string Unit = n/a
FIL2POS (native-keyword) Filter2 discrete position in of 12 Type = integer Unit = n/a
FIL2RAW (native-keyword) Filter2 raw position Type = integer Unit = encoder counts
FRAME (native-keyword) Telescope coordinate frame being used Type = string Unit = n/a
FRAMENO (native-keyword) Frame number of the next (or currently in-progress) exposure. This is appended after OUTFILE when constructing the name of the output disk file. Type = integer Unit = n/a
HA (native-keyword) Telescope apparent Hour Angle Type = string Unit = time
HATCLOS (native-keyword) Is the hatch closed? Type = string Unit = boolean
HATCON (native-keyword) Hatch control Type = string Unit = n/a Examples
HATOPEN (native-keyword) Is the hatch open? Type = string Unit = boolean
INSTRUME (native-keyword) The value field shall contain a character string identifying the instrument used to acquire the data contained in the array. Type = string Unit = n/a
IODCON (native-keyword) Iodine cell control Type = string Unit = n/a Examples
IODIN (native-keyword) Is the iodine cell in light path? Type = string Unit = boolean
IODOUT (native-keyword) Is the iodine cell out of light path? Type = string Unit = boolean
IROT2ANG (native-keyword) Image rotator secondary angle Type = real Unit = degrees
IROT2CAL (native-keyword, mosaic only) Is the image rotator encoder2 calibrated? Type = string Unit = n/a Examples
IROTCAL (native-keyword, mosaic only) Image rotator calibration Type = string Unit = n/a Examples
IROTCON (native-keyword) Image rotator control Type = string Unit = n/a Examples
IROTCVOP (native-keyword) Is the image rotator cover open? Type = string Unit = boolean
IROTIN (native-keyword) Image rotator not in light path Type = string Unit = boolean
IROTOUT (native-keyword) Image rotator out of light path Type = string Unit = boolean
KEEPPREP (native-keyword) Will prescan pixels be retained when image is displayed and saved as FITS? Prescan pixels result from a serial shift register with pixels preceding those transferred from the parallel array. Type = string Unit = boolean
LAMPCAT1 (native-keyword) Hollow cathode lamp1 Type = string Unit = n/a Examples
LAMPCAT2 (native-keyword) Hollow cathode lamp2 Type = string Unit = n/a Examples
LAMPDEUT (native-keyword) Deuterium lamp Type = string Unit = n/a Examples
LAMPLSR (native-keyword) laser-power Type = string Unit = n/a Examples
LAMPNAME (native-keyword) Name of lamp being used Type = string Unit = n/a Examples
LAMPQTZ2 (native-keyword) Quartz lamp2 Type = string Unit = n/a Examples
LFILCAL (native-keyword) Is the lamp filter calibrated? Type = string Unit = n/a Examples
LFILCON (native-keyword) lamp-filter-control Type = string Unit = n/a Examples
LFILNAME (native-keyword) Lamp filter name Type = string Unit = n/a
LFILPOS (native-keyword) Lamp filter discrete position in of 12 Type = integer Unit = n/a
LFILRAW (native-keyword) Lamp filter raw position Type = integer Unit = encoder counts
LIGHTS (native-keyword, mosaic only) Interior lights status Type = string Unit = n/a Examples
LMIRRIN (native-keyword) Is the comparison lamp mirror in? Type = string Unit = boolean
LMIRROUT (native-keyword) Is the comparison lamp mirror out? Type = string Unit = boolean
LSELCAL (native-keyword) Is the lamp select calibrated? Type = string Unit = n/a Examples
LSELCON (native-keyword) Lamp select control Type = string Unit = n/a Examples
LSELNAME (native-keyword) Lamp select name Type = string Unit = n/a
LSELRAW (native-keyword) Lamp select raw position Type = integer Unit = encoder counts
MJD (native-keyword) Modified Julian Date Type = real Unit = days
MOSMODE (native-keyword, mosaic only) A bitmask indicating which of the amplifiers in the mosaic will perform parallel shifts during a readout. This may be all, any or none of the CCDs. Serial shifts will occur for all CCDs, but unused amplifiers will contain only baseline. Type = string Unit = n/a Examples
NAXIS (native-keyword, mosaic only) A non-negative integer no greater than 999, representing the number of axes in an ordinary data array. A value of zero signifies that no data follow the header in the HDU. Type = integer Unit = pixels
NSUBINT (native-keyword) Number of subintegrations. NSUBINT must divide evenly into TTIME. Defines when to shift CCD pixel rows up by ROWSHFT during integration. Shift rows very TTIME/NSUBINT. Type = integer Type = integer Unit = n/a
NSUBINT1 (native-keyword, mosaic only) Number of subintegrations from CCD1 Type = integer Unit = n/a
NSUBINT2 (native-keyword, mosaic only) Number of subintegrations from CCD2 Type = integer Unit = n/a
NSUBINT3 (native-keyword, mosaic only) Number of subintegrations from CCD3 Type = integer Unit = n/a
NUMAMPS (native-keyword) Number of CCD amplifiers used during readout, set directly via AMPLIST Type = integer Unit = amplifiers
NVIDINP (native-keyword, mosaic only) Number of video inputs transmitted during readout. This was known as NUMAMPS before the advent of mosaic detectors, but the old concept is invalid. It cannot be set directly and must be set using AMPMOD and MOSMOD. Type = integer Unit = video inputs
OBJECT (native-keyword) The value field shall contain a character string giving the name of the object observed. Type = string Unit = n/a
OBSERVER (native-keyword) The value field shall contain a character string identifying who acquired the data associated with the header. Type = string Unit = n/a
OBSNUM (native-keyword) The observation sequence number Type = integer Unit = n/a
OBSTYPE (native-keyword, mosaic only) Intended as an instrument-specific way of indicating 'CCD image type' (ccdtype) for IRAF processing. Type = string Unit = n/a Examples
OUTDIR (native-keyword) A character string containing the default directory into which new CCD images are to be written. If this disk is full the images may be written elsewhere. The list of fallback directories is hardcoded into lickserv/write_image. Type = string Unit = n/a
OUTFILE (native-keyword) A character string defining the root name of the file(s) into which newly acquired data will be written if LTODISK is true. The full path is constructed from OUTDIR, OUTFILE, LFRAMENO, and DFORM. Type = string Unit = n/a
OVRFLUSH (native-keyword) Number of overscan lines (rows) to flush prior to reading overscan lines (POSTLINE). Type = integer Unit = pixels
PANE (native-keyword, mosaic only) Defines window for readout. Values are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE1 (native-keyword, mosaic only) Mosaic readout window 1. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE2 (native-keyword, mosaic only) Mosaic readout window 2. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE3 (native-keyword, mosaic only) Mosaic readout window 3. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE4 (native-keyword, mosaic only) Mosaic readout window 4. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE5 (native-keyword, mosaic only) Mosaic readout window 5. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE6 (native-keyword, mosaic only) Mosaic readout window 6. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE7 (native-keyword, mosaic only) Mosaic readout window 7. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE8 (native-keyword, mosaic only) Mosaic readout window 8. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE9 (native-keyword, mosaic only) Mosaic readout window 9. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE10 (native-keyword, mosaic only) Mosaic readout window 10. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE11 (native-keyword, mosaic only) Mosaic readout window 11. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE12 (native-keyword, mosaic only) Mosaic readout window 12. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE13 (native-keyword, mosaic only) Mosaic readout window 13. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE14 (native-keyword, mosaic only) Mosaic readout window 14. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE15 (native-keyword, mosaic only) Mosaic readout window 15. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANE16 (native-keyword, mosaic only) Mosaic readout window 16. Elements are: STARTROW,STARTCOL,NUMROWS,NUMCOLS specified and reported as unbinned pixels in ideal detector coordinates. Type = string Unit = pixels
PANEFITS (native-keyword, mosaic only) Indicates whether the readout of multiple panes of a mosaic detector will be written into one, some, or many different FITS HDUs. Type = string Unit = n/a Examples
PANELIST (native-keyword, mosaic only) Bitmask describing list of 16 PANEn keywords to be used when windowing the next mosaic readout. An entry of 0 terminates the active list. All bits 0 means the PANE keyword will be used; otherwise, bit 0 means PANE1, etc. Type = string Unit = n/a
PANERROR (native-keyword, mosaic only) Gives a list of active PANEs (from PANELIST) which were inconsistent at the time of the most recent EXPOSE command. They may be outside the mosaic, or outside the CCDs indicated by MOSMODE. Type = string Unit = n/a Examples
PARANG (native-keyword) The angle between vertical and north as measured on the sky where the telescope is pointing. Type = real Unit = degrees
PMT0MPOW (native-keyword) Photomultiplier tube #0 master power. Turns on the analog power to the ambient light sensor board when set to ON, turns it off when set to OFF. The ALS board must be turned on before power can be applied to the PMT via the PMT0TPOW keyword. Type = string Unit = n/a Examples
PMT0OVL (native-keyword) Photomultiplier tube #0 ambient light overload signal. The power to the PMT must be turned on via PMT0TPOW and the ambient light sensor reset via PMT0ALSR. Type = string Unit = boolean
PMT0TPOW (native-keyword) Photomultiplier tube #0 tube power. Turns on the power from the ambient light sensor board to the PMT counter when set to ON, turns it off when set to OFF. The ALS must be powered via the PMT0MPOW keyword first. Type = string Unit = n/a Examples
POSTLINE (native-keyword) Number of (binned) overscan rows to read following overscan flush (OVRFLUSH). Type = integer Unit = pixels
POSTPIX (native-keyword) Number of (unbinned) overscan pixels per amplifier. It should be set to a value which is divided evenly by the serial-direction binning value. Type = integer Unit = ixels
PRECOL (native-keyword, mosaic only) Was PREPIX in legacy data Number of unbinned prescan pixels per amplifier as reported by the CCD controller. Type = integer Unit = pixels
PREFLUSH (native-keyword) Number of prescan lines (rows) to flush after reading any saved prescan lines (PRELINE). Type = integer Unit = pixels
PRELINE (native-keyword) Number of (unbinned) prescan lines (rows) to read and save before any prescan flush (PREFLUSH). Type = integer Unit = pixels
PREPIX (native-keyword, legacy only) This keyword becomes PRECOL in mosaic data Number of prescan columns (legacy data) Type = integer Unit = pixels
PREROW (native-keyword, mosaic only) Number of unbinned prescan rows which must be parallel shifted out of the CCD before actual image rows begin, as reported by the CCD controller. Type = integer Unit = pixels
PROP0STA (native-keyword) Propeller mirror #0 status Type = string Unit = n/a Examples
PWRBLOK (native-keyword, mosaic only) Power to heater block in the dewar. The monitor will override external attempts to control the heater via this keyword, so its effectively read-only. Type = real Unit = Volts
RA (native-keyword) Current right ascension measured in the coordinate frame specified by FRAME (FK4, FK5 or apparent) and at the epoch of mean equinox and equator specified by EQUINOX Type = string Unit = sexagesimal degree
RCCVCLOS (native-keyword) Is the red collimator cover closed? Type = string Unit = boolean
RCCVOPEN (native-keyword) Is the red collimator cover open? Type = string Unit = boolean
RELHUM (native-keyword) Relative humidity Type = real Unit = %
ROTDEST (native-keyword) Rotator position target destination. Type = integer Unit = encoder counts
ROTMODE (native-keyword) Rotator control mode Type = string Unit = n/a Examples
ROTPOSN (native-keyword) Rotator discrete position Type = integer Unit = encoder counts
ROWSHFT (native-keyword) Number of CCD pixel rows to shift 'up' every TTIME/NSUBINT Type = integer Unit = pixels
SHBLCLTM (native-keyword, mosaic only) Sum of time intervals when the shutter blade was closing during the most recently started exposure. Type = read Unit = seconds
SHBLOPTM (native-keyword, mosaic only) Sum of time intervals when the shutter blade was opening during the most recently started exposure. Type = real Unit = seconds
SHCLOCNT (native-keyword, mosaic only) The number of times the shutter has closed for the most recently started exposure. It will be 0 for dark frames and the number of PAUSEs plus 1 for other frames. Type = integer Unit = n/a
SHLATCLO (native-keyword, mosaic only) Sum of time intervals between commanded start of shutter closing and beginning of motion of shutter for the most recently started exposure. Type = real Unit = seconds
SHLATOPN (native-keyword, mosaic only) Sum of time intervals between commanded start of shutter opening and beginning of motion of shutter for the most recently started exposure. Type = real Unit = seconds
SHOPNCNT (native-keyword, mosaic only) The number of times the shutter has opened for the most recently started exposure. It will be 0 for dark frames and 1 plus the number of RESUMEs for other frames. Type = integer Unit = n/a
SIMPLE (native-keyword) The value field shall contain a logical constant with the value T if the file conforms to this standard. This keyword is mandatory only for the primary header. A value of F signifies that the file does not conform in some significant way. Type = string Unit = boolean
SLITCAL (native-keyword) Is the slit calibrated? Type = string Unit = n/a Examples
SLITCON (native-keyword) Slit control Type = string Unit = n/a Examples
SLITLEN (native-keyword) Slit length projected on sky Type = real Unit = arcsec
SLITNAME (native-keyword) Slit name Type = string Unit = n/a
SLITRAW (native-keyword) Slit raw position Type = integer Unit = encoder counts
SLITWID (native-keyword) Slit width Type = real Unit = mm
ST (native-keyword) Local sidereal time Type = string Unit = time
SYNOPSIS (native-keyword) A one-line synopsis of other keywords in the FITS header for the convenience of the observer and data reducer. If the KTL keyword is blank then write_image (the lickserv child) will use SYNOPFMT to create a value for the FITS file. Type = string Unit = n/a
SYNOPFMT (native-keyword) This keyword contains a macro substitution string which write_image (the lickserv child) may use to create the value of the SYNOPSIS keyword that it writes into a FITS image at the end of an exposure. The character '$' must begin and end each keyword. Type = string Unit = n/a
TARGNAME (native-keyword) Target name Type = string Unit = n/a
TELESCOP (native-keyword) A character string identifying the telescope used to acquire the data contained in the array Type = string Unit = n/a
TELFOCUS (native-keyword) Telescope focus Type = integer Unit = um
TEMPCOOL (native-keyword) External coolant temperature Type = real Unit = degC
TEMPDET (native-keyword) Detector temperature (average). Type = real Unit = degC
TEMPDET1 (native-keyword, mosaic only) Detector #1 temperature. Type = real Unit = degC
TEMPDET2 (native-keyword, mosaic only) Detector #2 temperature. Type = real Unit = degC
TEMPDET3 (native-keyword, mosaic only) Detector #3 temperature. Type = real Unit = degC
TEMPIN (native-keyword) Inside temperature Type = real Unit = degC
TEMPIOD1 (native-keyword) Iodine cell temperature1 Type = real Unit = degC
TEMPIOD2 (native-keyword) Iodine cell temperature2 Type = real Unit = degC
TEMPLAMP (native-keyword) Lamp enclosure temperature Type = real Unit = degC
TEMPOUT (native-keyword) Outside temperature Type = real Unit = degC
TEMPSET (native-keyword) Detector temperature set point. Type = real Unit = degC
TEMPTV (native-keyword) TV enclosure temperature Type = real Unit = degC
TTIME (native-keyword) Target length of time for the exposure. The exposure terminates if TTIME is not greater than ELAPTIME, which provides a mechanism for ending observations early. This (and EXPOSURE, q.v.) should not be used as shutter open time. Type = integer Unit = seconds
TVACAL (native-keyword) IS the TV aperture calibrated? Type = string Unit = n/a Examples
TVACON (native-keyword) TV aperture control Type = string Unit = n/a Examples
TVANAME (native-keyword) TV aperature name Type = string Unit = n/a
TVARAW (native-keyword) TV aperture raw position Type = integer Unit = counts
TVF1CAL (native-keyword) Is the TV filter1 calibarted? Type = string Unit = n/a Examples
TVF1CON (native-keyword) TV filter1 control Type = string Unit = n/a Examples
TVF1NAME (native-keyword) TV filter1 name Type = string Unit = n/a
TVF1POS (native-keyword) TV filter1 discrete position in of 8 Type = integer Unit = n/a
TVF1RAW (native-keyword) TV filter1 raw position Type = integer Unit = counts
TVF2CAL (native-keyword) Is the TV filter2 calibarated? Type = string Unit = n/a Examples
TVF2CON (native-keyword) TV filter2 control Type = string Unit = n/a Examples
TVF2NAME (native-keyword) TV filter2 name Type = string Unit = n/a
TVF2POS (native-keyword) TV filter2 discrete position in of 8 Type = integer Unit = n/a
TVF2RAW (native-keyword) TV filter2 raw position Type = integer Unit = counts
TVFCAL (native-keyword) Is the TV focus calibrated? Type = string Unit = n/a Examples
TVFCON (native-keyword) TV focus control Type = string Unit = n/a Examples
TVFNAME (native-keyword) TV focus name Type = string Unit = n/a
TVFOCUS (native-keyword) TV focus location Type = integer Unit = Type = string Unit = um
TVFRAW (native-keyword) TV focus raw position Type = real Unit = counts
TVON (native-keyword) TV controller power Type = string Unit = n/a Examples
UPSON (native-keyword) UPS power Type = string Unit = n/a Examples
UTC or UT (native-keyword) Coordinated universal time. Optical instruments typically obtain it at some time after the shutter opens. Type = string Unit = time
UTC-END or UT-END (native-keyword) UT time of end of exposure Type = string Unit = time
UTB15VEN (native-keyword, mosaic only) Enable +/-15 volt analog power in the CCD controller. Type = string Unit = n/a Examples:
UTB30VEN (native-keyword, mosaic only) Enable +30 volt analog power in the CCD controller. Type = string Unit = n/a Examples:
UTBM15V (native-keyword, mosaic only) -15 volt power supply voltage level. Type = real Unit = Volts
UTBP15V (native-keyword, mosaic only) +15 volt power supply voltage level. Type = real Unit = Volts
UTBP30V (native-keyword, mosaic only) +30 volt power supply voltage level. Type = real Unit = Volts
UTBP5V (native-keyword, mosaic only) +5 volt power supply voltage level. Type = real Unit = Volts
UTBTEMP (native-keyword, mosaic only) Temperature of the CCD controller utility board. Type = real Unit = degC
VIDINACT (native-keyword, mosaic only) ?
VIDINBEG (native-keyword, mosaic only) The unformatted equivalent of the KTL keyword ERAMODE created by watch_ccd. A bitmask indicating which of the amplifiers in the mosaic were erased at the beginning of the sub-exposure. Bit 0 corresponds to video input 1. Type = integer Unit = n/a
VIDINEND (native-keyword, mosaic only) The unformatted equivalent of the KTL keyword MOSMODE created by watch_ccd. A bitmask indicating which of the amplifiers in the mosaic were shifted at the end of the sub-exposure. Bit 0 corresponds to video input 1. See AMPMODE for active amplifiers. Type = integer Unit = n/a
VIDOFF1 (native-keyword, mosaic only) Same as VOFFSET0 for legacy data Video offset for CCD controller analog board #1. This corresponds to amplifier #1. Type = integer Unit = video offset
VIDOFF2 (native-keyword, mosaic only) Same as VOFFSET1 for legacy data Video offset for CCD controller analog board #2. This corresponds to amplifier #2. Type = integer Unit = video offset
VIDOFF3 (native-keyword, mosaic only) Video offset for CCD controller analog board #3. This corresponds to amplifier #3. Type = integer Unit = video offset
VIDOFF4 (native-keyword, mosaic only) Video offset for CCD controller analog board #4. This corresponds to amplifier #4. Type = integer Unit = video offset
VIDOFF5 (native-keyword, mosaic only) Video offset for CCD controller analog board #5. This corresponds to amplifier #5. Type = integer Unit = video offset
VIDOFF6 (native-keyword, mosaic only) Video offset for CCD controller analog board #6. This corresponds to amplifier #6. Type = integer Unit = video offset
VOFFSET0 (native-keyword, legacy only) Same as VIDOFF1 for mosaic data Video offset for CCD controller analog board #1. This corresponds to amplifier #1. Type = integer Unit = video offset
VOFFSET0 (native-keyword, legacy only) Same as VIDOFF2 for mosaic data Video offset for CCD controller analog board #2. This corresponds to amplifier #2. Type = integer Unit = video offset
WINDOW (native-keyword, legacy only) Defines window for readout. Values are: WINMODE, STARTROW, STARTCOL, NUMROWS, NUMCOLS. Specified and reported as binned pixels. Type = string Unit = pixels
XCOVCLOS (native-keyword) Is the cross disperser cover closed? Type = string Unit = boolean
XCOVOPEN (native-keyword) Is the cross disperser cover open? Type = string Unit = boolean
XDANGL (native-keyword) The difference between the current angular position of the HIRES cross disperser and its 'on-blaze' position. Positive values put redder orders onto the detector. Type = real Unit = degrees
XDCAL (native-keyword) Is the cross disperser calibrated? Type = string Unit = n/a Examples
XDCON (native-keyword) Cross disperser control Type = string Unit = n/a Examples
XDDELTAD (native-keyword) Cross disperser blaze Type = real Unit = degrees
XDISPERS (native-keyword) Cross disperser's name Type = string Unit = n/a
XDNAME (native-keyword) Cross disperser name Type = string Unit = n/a
XDPIX (native-keyword) Cross disperser pixel position Type = integer Unit = pixel row
XDRAW (native-keyword) Cross disperser raw position Type = integer Unit = encoder counts
XDSIGMAI (native-keyword) Cross disperser sigma Type = real Unit = degrees
XFLIP (native-keyword) Camera X flip Type = string Unit = boolean
YFLIP (native-keyword) Camera Y flip Type = string Unit = boolean