fiberflatexp-CAMERA-EXPID.fits
- Summary:
This file contains the fiberflat to use for a specific exposure such that newflux = rawflux/fiberflat.
- Naming Convention:
fiberflatexp-{CAMERA}-{EXPID}.fits
, where{camera}
is the camera name (e.g. b0, r1, z9) and{EXPID}
is the zero padded 8-digit exposure ID.- Regex:
fiberflatexp-[brz][0-9]-[0-9]{8}\.fits
- File Type:
FITS, 15 MB
Contents
Number |
EXTNAME |
Type |
Contents |
---|---|---|---|
FIBERFLAT |
IMAGE |
fiberflat[nspec, nwave] |
|
IVAR |
IMAGE |
inverse variance of fiberflat |
|
MASK |
IMAGE |
bitmask of fiberflat (0=good) |
|
MEANSPEC |
IMAGE |
average spectrum[nwave] |
|
WAVELENGTH |
IMAGE |
wavelength grid[nwave] in Angstroms |
|
FIBERMAP |
BINTABLE |
Target photometry, metadata, and what fibers they are assigned to |
FITS Header Units
HDU0
EXTNAME = FIBERFLAT
Fiber flat field correction to homogeneize the response among fibers of the same camera, for each wavelength. 2D array of dimension [nspec, nwave]. nspec is the number of fibers per camera. nwave in the length of the wavelength array. The fiber flat field of all fibers share the same wavelength grid (given in HDU WAVELENGTH). This file is valid for a specific exposure as it comprises a correction based on the humidity in the spectrograph enclosure.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
2326 |
int |
|
NAXIS2 |
500 |
int |
|
EXPID |
68978 |
int |
Exposure number |
EXPFRAME |
0 |
int |
Frame number |
FLAVOR |
science |
str |
Observation type |
SEQUENCE |
Spectrographs |
str |
OCS Sequence name |
PURPOSE |
Commissioning |
str |
Purpose of observing night |
PROGRAM |
CALIB DESI-CALIB-00 LEDs only |
str |
Program name |
PROPID |
2019B-5000 |
str |
Proposal ID |
OBSERVER |
DESIObserver |
str |
Names of observers |
LEAD |
RunManager |
str |
Lead observer |
INSTRUME |
DESI |
str |
Instrument name |
OBSERVAT |
KPNO |
str |
Observatory name |
OBS-LAT |
31.96403 |
str |
[deg] Observatory latitude |
OBS-LONG |
-111.59989 |
str |
[deg] Observatory east longitude |
OBS-ELEV |
2097.0 |
float |
[m] Observatory elevation |
TELESCOP |
KPNO 4.0-m telescope |
str |
Telescope name |
CORRCTOR |
DESI Corrector |
str |
Corrector Identification |
NIGHT |
20201220 |
int |
Observing night |
TIMESYS |
UTC |
str |
Time system used for date-obs |
DATE-OBS |
2020-12-20T22:21:08.680251 |
str |
[UTC] Observation data and start time |
TIME-OBS |
22:21:08.680251 |
str |
[UTC] Observation start time |
MJD-OBS |
59203.93135047 |
float |
Modified Julian Date of observation |
ST |
20:54:33.840 |
str |
Local Sidereal time at observation start (HH:MM |
EXPTIME |
120.042 |
float |
[s] Actual exposure time |
DELTARA |
0.0 |
float |
[arcsec] Offset], right ascension, observer inp |
DELTADEC |
0.0 |
float |
[arcsec] Offset], declination, observer input |
VCCD |
ON |
str |
True (ON) if CCD voltage is on |
VCCDON |
2020-12-09T21:23:19.320868 |
str |
Time when CCD voltage was turned on |
VCCDSEC |
954038.9 |
float |
[s] CCD on time in seconds |
EQUINOX [1] |
2000.0 |
float |
Epoch of observation |
SPECGRPH |
0 |
int |
Spectrograph logical name (SP) |
SPECID |
4 |
int |
Spectrograph serial number (SM) |
FEEBOX |
lbnl078 |
str |
CCD Controller serial number |
VESSEL |
14 |
int |
Cryostat serial number |
FEEVER |
v20160312 |
str |
CCD Controller version |
FEEPOWER |
ON |
str |
FEE power status |
FEEDMASK |
2134851391 |
int |
FEE dac mask |
FEECMASK |
1048575 |
int |
FEE clk mask |
CCDTEMP |
-142.1871 |
float |
[deg C] CCD controller CCD temperature |
RADESYS |
FK5 |
str |
Coordinate reference frame of major/minor axes |
FILENAME |
/exposures/desi/specs/20201220/00068978/sp0-00068978.fits.fz |
str |
Name |
DOSVER |
trunk |
str |
DOS software version |
OCSVER |
1.2 |
float |
OCS software version |
CONSTVER |
DESI:CURRENT |
str |
Constants version |
INIFILE |
/data/msdos/dos_home/architectures/kpno/desi.ini |
str |
DOS Configuration |
CASETEMP |
57.3533 |
float |
[deg C] CCD controller case temperature |
OFFSET1 |
0.4000000059604645,-8.858 |
str |
[V] set value, measured value |
CLOCK18 |
9.0,0.9999 |
str |
[V] high rail, low rail |
BIASSECC |
[2065:2128, 2130:4193] |
str |
Bias section for quadrant C |
CLOCK12 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
CLOCK9 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
AMPSECC |
[1:2057, 4128:2065] |
str |
AMP section for quadrant C |
DAC9 |
-25.0003,-24.5305 |
str |
[V] set value, measured value |
CLOCK15 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
CLOCK8 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
PRESECA |
[1:7, 2:2065] |
str |
Prescan section for quadrant A |
CCDPREP |
purge,clear |
str |
CCD prep actions |
DAC16 |
39.9961,39.5934 |
str |
[V] set value, measured value |
OFFSET3 |
0.4000000059604645,-8.9095 |
str |
[V] set value, measured value |
DETSECB |
[2058:4114, 1:2064] |
str |
Detector section for quadrant B |
BIASSECA |
[2065:2128, 2:2065] |
str |
Bias section for quadrant A |
PGAGAIN |
3 |
int |
Controller gain |
DAC13 |
0.0,0.0148 |
str |
[V] set value, measured value |
CLOCK6 |
9.9999,0.0 |
str |
[V] high rail, low rail |
DAC10 |
-25.0003,-24.3376 |
str |
[V] set value, measured value |
DAC7 |
5.9998,6.028 |
str |
[V] set value, measured value |
CLOCK1 |
9.9999,0.0 |
str |
[V] high rail, low rail |
CLOCK5 |
9.9999,0.0 |
str |
[V] high rail, low rail |
CLOCK11 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
ORSECC |
[8:2064, 2098:2129] |
str |
Row overscan section for quadrant C |
DAC15 |
0.0,-0.0148 |
str |
[V] set value, measured value |
DETSECA |
[1:2057, 1:2064] |
str |
Detector section for quadrant A |
CDSPARMS |
400, 400, 8, 2000 |
str |
CDS parameters |
PRRSECC |
[8:2064, 4194:4194] |
str |
Row prescan section for quadrant C |
BLDTIME |
0.3509 |
float |
[s] Time to build image |
DAC11 |
-25.0003,-24.3673 |
str |
[V] set value, measured value |
OFFSET2 |
0.4000000059604645,-8.9301 |
str |
[V] set value, measured value |
BIASSECB |
[2129:2192, 2:2065] |
str |
Bias section for quadrant B |
DELAYS |
20, 20, 25, 40, 7, 3000, 7, 7, 7, 7 |
str |
[10] Delay settings |
CLOCK0 |
9.9999,0.0 |
str |
[V] high rail, low rail |
OFFSET5 |
2.0,6.028 |
str |
[V] set value, measured value |
CLOCK10 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
DATASECD |
[2193:4249, 2130:4193] |
str |
Data section for quadrant D |
DAC1 |
-9.0002,-8.858 |
str |
[V] set value, measured value |
DIGITIME |
47.5334 |
float |
[s] Time to digitize image |
CAMERA |
r0 |
str |
Camera name |
CCDNAME |
CCDSM4R |
str |
CCD name |
DAC6 |
5.9998,6.0017 |
str |
[V] set value, measured value |
CCDSIZE |
4194,4256 |
str |
CCD size in pixels (rows, columns) |
CLOCK4 |
9.9999,0.0 |
str |
[V] high rail, low rail |
CCDSECD |
[2058:4114, 2065:4128] |
str |
CCD section for quadrant D |
CCDSECB |
[2058:4114, 1:2064] |
str |
CCD section for quadrant B |
DAC8 |
-25.0003,-24.9164 |
str |
[V] set value, measured value |
CLOCK14 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
CLOCK2 |
9.9999,0.0 |
str |
[V] high rail, low rail |
CCDCFG |
default_lbnl_20190717.cfg |
str |
CCD configuration file |
PRESECD |
[4250:4256, 2130:4193] |
str |
Prescan section for quadrant D |
DETSECD |
[2058:4114, 2065:4128] |
str |
Detector section for quadrant D |
DATASECA |
[8:2064, 2:2065] |
str |
Data section for quadrant A |
CLOCK13 |
9.9992,2.9993 |
str |
[V] high rail, low rail |
ORSECB |
[2193:4249, 2066:2097] |
str |
Row overscan section for quadrant B |
DATASECC |
[8:2064, 2130:4193] |
str |
Data section for quadrant C |
AMPSECA |
[1:2057, 1:2064] |
str |
AMP section for quadrant A |
ORSECD |
[2193:4249, 2098:2129] |
str |
Row bias section for quadrant D |
PRRSECA |
[8:2064, 1:1] |
str |
Row prescan section for quadrant A |
CCDSECA |
[1:2057, 1:2064] |
str |
CCD section for quadrant A |
DAC3 |
-9.0002,-8.9095 |
str |
[V] set value, measured value |
SETTINGS |
detectors_sm_20191211.json |
str |
Name of DESI CCD settings file |
AMPSECB |
[4114:2058, 1:2064] |
str |
AMP section for quadrant B |
CRYOTEMP [1] |
163.044 |
float |
[deg K] Cryostat CCD temperature |
DAC17 |
20.0008,11.9804 |
str |
[V] set value, measured value |
CLOCK7 |
-2.0001,3.9999 |
str |
[V] high rail, low rail |
TRIMSECB |
[2193:4249, 2:2065] |
str |
Trim section for quadrant B |
CCDSECC |
[1:2057, 2065:4128] |
str |
CCD section for quadrant C |
PRRSECB |
[2193:4249, 1:1] |
str |
Row prescan section for quadrant B |
DATASECB |
[2193:4249, 2:2065] |
str |
Data section for quadrant B |
PRESECC |
[1:7, 2130:4193] |
str |
Prescan section for quadrant C |
DAC5 |
5.9998,6.028 |
str |
[V] set value, measured value |
DAC14 |
0.0,-0.0148 |
str |
[V] set value, measured value |
PRESECB |
[4250:4256, 2:2065] |
str |
Prescan section for quadrant B |
PRRSECD |
[2193:4249, 4194:4194] |
str |
Row prescan section for quadrant D |
AMPSECD |
[4114:2058, 4128:2065] |
str |
AMP section for quadrant D |
DAC12 |
0.0,0.0 |
str |
[V] set value, measured value |
TRIMSECC |
[8:2064, 2130:4193] |
str |
Trim section for quadrant C |
CLOCK17 |
9.0,0.9999 |
str |
[V] high rail, low rail |
TRIMSECD |
[2193:4249, 2130:4193] |
str |
Trim section for quadrant D |
DETSECC |
[1:2057, 2065:4128] |
str |
Detector section for quadrant C |
CRYOPRES [1] |
9.322e-08 |
str |
[mb] Cryostat pressure (IP) |
OFFSET0 |
0.4000000059604645,-8.9198 |
str |
[V] set value, measured value |
CPUTEMP |
56.9941 |
float |
[deg C] CCD controller CPU temperature |
CLOCK16 |
9.9999,3.0 |
str |
[V] high rail, low rail |
OFFSET4 |
2.0,6.0174 |
str |
[V] set value, measured value |
CCDTMING |
default_lbnl_timing_20180905.txt |
str |
CCD timing file |
TRIMSECA |
[8:2064, 2:2065] |
str |
Trim section for quadrant A |
DAC4 |
5.9998,6.0174 |
str |
[V] set value, measured value |
OFFSET7 |
2.0,6.0332 |
str |
[V] set value, measured value |
CLOCK3 |
-2.0001,3.9999 |
str |
[V] high rail, low rail |
ORSECA |
[8:2064, 2066:2097] |
str |
Row overscan section for quadrant A |
OFFSET6 |
2.0,6.0017 |
str |
[V] set value, measured value |
DETECTOR |
M1-49 |
str |
Detector (ccd) identification |
DAC0 |
-9.0002,-8.9198 |
str |
[V] set value, measured value |
DAC2 |
-9.0002,-8.9301 |
str |
[V] set value, measured value |
BIASSECD |
[2129:2192, 2130:4193] |
str |
Bias section for quadrant D |
REQTIME |
120.0 |
float |
[s] Requested exposure time |
OBSID |
kp4m20201220t222108 |
str |
Unique observation identifier |
PROCTYPE |
RAW |
str |
Data processing level |
PRODTYPE |
image |
str |
Data product type |
CHECKSUM |
oo3Aon02on08on08 |
str |
HDU checksum updated 2022-01-29T01:26:43 |
DATASUM |
424075550 |
str |
data unit checksum updated 2022-01-29T01:26:43 |
GAINA |
1.655 |
float |
e/ADU (gain applied to image) |
SATULEVA |
65535.0 |
float |
saturation or non lin. level, in ADU, inc. bias |
OSTEPA [1] |
0.7301409887440968 |
float |
ADUs (max-min of median overscan per row) |
OMETHA [1] |
AVERAGE |
str |
use average overscan |
OVERSCNA |
1978.069214285938 |
float |
ADUs (gain not applied) |
OBSRDNA |
2.798159188935688 |
float |
electrons (gain is applied) |
SATUELEA |
105186.7204503568 |
float |
saturation or non lin. level, in electrons |
GAINB |
1.488 |
float |
e/ADU (gain applied to image) |
SATULEVB |
65535.0 |
float |
saturation or non lin. level, in ADU, inc. bias |
OSTEPB [1] |
0.7607557420124067 |
float |
ADUs (max-min of median overscan per row) |
OMETHB [1] |
AVERAGE |
str |
use average overscan |
OVERSCNB |
1987.133968648987 |
float |
ADUs (gain not applied) |
OBSRDNB |
2.557416670656615 |
float |
electrons (gain is applied) |
SATUELEB |
94559.2246546503 |
float |
saturation or non lin. level, in electrons |
GAINC |
1.583 |
float |
e/ADU (gain applied to image) |
SATULEVC |
65535.0 |
float |
saturation or non lin. level, in ADU, inc. bias |
OSTEPC [1] |
0.6293911971442867 |
float |
ADUs (max-min of median overscan per row) |
OMETHC [1] |
AVERAGE |
str |
use average overscan |
OVERSCNC |
1966.939262512987 |
float |
ADUs (gain not applied) |
OBSRDNC |
2.703494293725218 |
float |
electrons (gain is applied) |
SATUELEC |
100628.2401474419 |
float |
saturation or non lin. level, in electrons |
GAIND |
1.507 |
float |
e/ADU (gain applied to image) |
SATULEVD |
65535.0 |
float |
saturation or non lin. level, in ADU, inc. bias |
OSTEPD [1] |
0.6596786995360162 |
float |
ADUs (max-min of median overscan per row) |
OMETHD [1] |
AVERAGE |
str |
use average overscan |
OVERSCND |
1994.41783538263 |
float |
ADUs (gain not applied) |
OBSRDND |
2.441905057216482 |
float |
electrons (gain is applied) |
SATUELED |
95755.65732207838 |
float |
saturation or non lin. level, in electrons |
FIBERMIN |
0 |
int |
|
LONGSTRN [1] |
OGIP 1.0 |
str |
The OGIP Long String Convention may be used. |
MODULE |
CI |
str |
Image Sources/Component |
FRAMES |
None |
Unknown |
Number of Frames in Archive |
COSMSPLT |
F |
bool |
Cosmics split exposure if true |
MAXSPLIT |
0 |
int |
Number of allowed exposure splits |
SPLITIDS [1] |
68978 |
str |
List of expids for split exposures |
OBSTYPE |
FLAT |
str |
Spectrograph observation type |
MANIFEST |
F |
bool |
DOS exposure manifest |
OBJECT |
str |
Object name |
|
SEQID |
3 requests |
str |
Exposure sequence identifier |
SEQNUM |
1 |
int |
Number of exposure in sequence |
SEQTOT |
3 |
int |
Total number of exposures in sequence |
OPENSHUT |
None |
Unknown |
Time shutter opened |
CAMSHUT |
open |
str |
Shutter status during observation |
WHITESPT [1] |
T |
bool |
Telescope is at whitespot |
ZENITH [1] |
F |
bool |
Telescope is at zenith |
SEANNEX [1] |
F |
bool |
Telescope is at SE annex |
BEYONDP [1] |
F |
bool |
Telescope is beyond pole |
FIDUCIAL [1] |
off |
str |
Fiducials status during observation |
AIRMASS [1] |
1.521306 |
float |
Airmass |
FOCUS [1] |
1163.9,-689.8,370.4,13.8,24.2,-0.0 |
str |
Telescope focus settings |
TRUSTEMP [1] |
13.2 |
float |
[deg] Average Telescope truss temperature (only |
PMIRTEMP [1] |
7.3 |
float |
[deg] Average primary mirror temperature (nit,e |
PMREADY [1] |
F |
bool |
Primary mirror ready |
PMCOVER [1] |
open |
str |
Primary mirror cover |
PMCOOL [1] |
on |
str |
Primary mirror cooling |
DOMSHUTU [1] |
not open |
str |
Upper dome shutter |
DOMSHUTL [1] |
not open |
str |
Lower dome shutter |
DOMLIGHH [1] |
off |
str |
High dome lights |
DOMLIGHL [1] |
off |
str |
Low dome lights |
DOMEAZ [1] |
253.289 |
float |
[deg] Dome azimuth angle |
DOMINPOS [1] |
F |
bool |
Dome is in position |
GUIDOFFR [1] |
0.0 |
float |
[arcsec] Cummulative guider offset (RA) |
GUIDOFFD [1] |
-0.0 |
float |
[arcsec] Cummulative guider offset (dec) |
MOONDEC [1] |
-9.840963 |
float |
[deg] Moon declination at start of exposure |
MOONRA [1] |
350.487504 |
float |
[deg] Moon RA at start of exposure |
MOUNTAZ [1] |
73.494042 |
float |
[deg] Mount azimuth angle |
MOUNTDEC [1] |
31.962725 |
float |
[deg] Mount declination |
MOUNTEL [1] |
41.035784 |
float |
[deg] Mount elevation angle |
MOUNTHA [1] |
-58.479517 |
float |
[deg] Mount hour angle |
INCTRL [1] |
F |
bool |
DESI in control |
INPOS [1] |
T |
bool |
Mount in position |
MNTOFFD [1] |
-0.0 |
float |
[arcsec] Mount offset (dec) |
MNTOFFR [1] |
-0.0 |
float |
[arcsec] Mount offset (RA) |
PARALLAC [1] |
-73.492831 |
float |
[deg] Parallactic angle |
SKYDEC [1] |
31.962725 |
float |
[deg] Telescope declination (pointing on sky) |
SKYRA [1] |
12.118172 |
float |
[deg] Telescope right ascension (pointing on sk |
TARGTDEC [1] |
31.9633 |
float |
[deg] Target declination (to TCS) |
TARGTRA [1] |
6.305085 |
float |
[deg] Target right ascension (to TCS) |
TARGTAZ [1] |
75.317651 |
float |
[deg] Target azimuth |
TARGTEL [1] |
45.786076 |
float |
[deg] Target elevation |
TRGTOFFD [1] |
0.0 |
float |
[arcsec] Telescope target offset (dec) |
TRGTOFFR [1] |
0.0 |
float |
[arcsec] Telescope target offset (RA) |
ZD [1] |
48.964216 |
float |
[deg] Telescope zenith distance |
TCSST [1] |
20:54:33.277 |
str |
Local Sidereal time reported by TCS (HH:MM:SS) |
TCSMJD [1] |
59203.93178 |
float |
MJD reported by TCS |
ADCCORR |
F |
bool |
Correct pointing for ADC setting if True |
ADC1PHI [1] |
114.980003 |
float |
[deg] ADC 1 angle |
ADC2PHI [1] |
162.869907 |
float |
[deg] ADC 2 angle |
ADC1HOME [1] |
F |
bool |
ADC 1 at home position if True |
ADC2HOME [1] |
F |
bool |
ADC 2 at home position if True |
ADC1NREV [1] |
0.0 |
float |
ADC 1 number of revs |
ADC2NREV [1] |
-1.0 |
float |
ADC 2 number of revs |
ADC1STAT [1] |
STOPPED |
str |
ADC 1 status |
ADC2STAT [1] |
STOPPED |
str |
ADC 2 status |
HEXPOS [1] |
1163.9,-689.8,370.4,13.8,24.2,-0.0 |
str |
Hexapod position |
HEXTRIM [1] |
0.0,0.0,0.0,0.0,0.0,0.0 |
str |
Hexapod trim values |
ROTOFFST [1] |
0.0 |
float |
[arcsec] Rotator offset |
ROTENBLD [1] |
T |
bool |
Rotator enabled |
ROTRATE [1] |
0.0 |
float |
[arcsec/min] Rotator rate |
RESETROT |
F |
bool |
DOS Control: reset hex rotator |
GUIDMODE |
catalog |
str |
Guider mode |
USEAOS [1] |
F |
bool |
DOS Control: AOS data available if true |
SPCGRPHS |
SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 |
str |
Participating spectrograph |
ILLSPECS [1] |
SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 |
str |
Participating illuminate s |
CCDSPECS [1] |
SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9 |
str |
Participating ccd spectrog |
TDEWPNT [1] |
-18.063 |
float |
Telescope air dew point |
TAIRFLOW [1] |
1.121 |
float |
Telescope air flow |
TAIRITMP [1] |
10.5 |
float |
[deg] Telescope air in temperature |
TAIROTMP [1] |
5.7 |
float |
[deg] Telescope air out temperature |
TAIRTEMP [1] |
11.843 |
float |
[deg] Telescope air temperature |
TCASITMP [1] |
0.0 |
float |
[deg] Telescope Cass Cage in temperature |
TCASOTMP [1] |
9.6 |
float |
[deg] Telescope Cass Cage out temperature |
TCSITEMP [1] |
7.4 |
float |
[deg] Telescope center section in temperature |
TCSOTEMP [1] |
10.2 |
float |
[deg] Telescope center section out temperature |
TCIBTEMP [1] |
0.0 |
float |
[deg] Telescope chimney IB temperature |
TCIMTEMP [1] |
0.0 |
float |
[deg] Telescope chimney IM temperature |
TCITTEMP [1] |
0.0 |
float |
[deg] Telescope chimney IT temperature |
TCOSTEMP [1] |
0.0 |
float |
[deg] Telescope chimney OS temperature |
TCOWTEMP [1] |
0.0 |
float |
[deg] Telescope chimney OW temperature |
TDBTEMP [1] |
7.3 |
float |
[deg] Telescope dec bore temperature |
TFLOWIN [1] |
8.0 |
float |
Telescope flow rate in |
TFLOWOUT [1] |
8.3 |
float |
Telescope flow rate out |
TGLYCOLI [1] |
-1.9 |
float |
[deg] Telescope glycol in temperature |
TGLYCOLO [1] |
0.0 |
float |
[deg] Telescope glycol out temperature |
THINGES [1] |
12.9 |
float |
[deg] Telescope hinge S temperature |
THINGEW [1] |
11.9 |
float |
[deg] Telescope hinge W temperature |
TPMAVERT [1] |
7.295 |
float |
[deg] Telescope mirror averagetemperature |
TPMDESIT [1] |
7.0 |
float |
[deg] Telescope mirror desired temperature |
TPMEIBT [1] |
7.4 |
float |
[deg] Telescope mirror EIB temperature |
TPMEITT [1] |
7.3 |
float |
[deg] Telescope mirror EIT temperature |
TPMEOBT [1] |
7.4 |
float |
[deg] Telescope mirror EOB temperature |
TPMEOTT [1] |
7.1 |
float |
[deg] Telescope mirror EOT temperature |
TPMNIBT [1] |
7.5 |
float |
[deg] Telescope mirror NIB temperature |
TPMNITT [1] |
7.2 |
float |
[deg] Telescope mirror NIT temperature |
TPMNOBT [1] |
7.7 |
float |
[deg] Telescope mirror NOB temperature |
TPMNOTT [1] |
7.5 |
float |
[deg] Telescope mirror NOT temperature |
TPMRTDT [1] |
7.09 |
float |
[deg] Telescope mirror RTD temperature |
TPMSIBT [1] |
7.4 |
float |
[deg] Telescope mirror SIB temperature |
TPMSITT [1] |
7.0 |
float |
[deg] Telescope mirror SIT temperature |
TPMSOBT [1] |
7.4 |
float |
[deg] Telescope mirror SOB temperature |
TPMSOTT [1] |
7.1 |
float |
[deg] Telescope mirror SOT temperature |
TPMSTAT [1] |
soft air |
str |
Telescope mirror status |
TPMWIBT [1] |
7.3 |
float |
[deg] Telescope mirror WIB temperature |
TPMWITT [1] |
7.1 |
float |
[deg] Telescope mirror WIT temperature |
TPMWOBT [1] |
7.6 |
float |
[deg] Telescope mirror WOB temperature |
TPMWOTT [1] |
8.1 |
float |
[deg] Telescope mirror WOT temperature |
TPCITEMP [1] |
7.7 |
float |
[deg] Telescope primary cell in temperature |
TPCOTEMP [1] |
7.7 |
float |
[deg] Telescope primary cell out temperature |
TPR1HUM [1] |
0.0 |
float |
Telescope probe 1 humidity |
TPR1TEMP [1] |
0.0 |
float |
[deg] Telescope probe1 temperature |
TPR2HUM [1] |
0.0 |
float |
Telescope probe 2 humidity |
TPR2TEMP [1] |
0.0 |
float |
[deg] Telescope probe2 temperature |
TSERVO [1] |
7.0 |
float |
Telescope servo setpoint |
TTRSTEMP [1] |
13.0 |
float |
[deg] Telescope top ring S temperature |
TTRWTEMP [1] |
13.4 |
float |
[deg] Telescope top ring W temperature |
TTRUETBT [1] |
-4.8 |
float |
[deg] Telescope truss ETB temperature |
TTRUETTT [1] |
11.6 |
float |
[deg] Telescope truss ETT temperature |
TTRUNTBT [1] |
11.0 |
float |
[deg] Telescope truss NTB temperature |
TTRUNTTT [1] |
11.8 |
float |
[deg] Telescope truss NTT temperature |
TTRUSTBT [1] |
11.2 |
float |
[deg] Telescope truss STB temperature |
TTRUSTST [1] |
10.8 |
float |
[deg] Telescope truss STS temperature |
TTRUSTTT [1] |
12.4 |
float |
[deg] Telescope truss STT temperature |
TTRUTSBT [1] |
13.5 |
float |
[deg] Telescope truss TSB temperature |
TTRUTSMT [1] |
13.6 |
float |
[deg] Telescope truss TSM temperature |
TTRUTSTT [1] |
12.5 |
float |
[deg] Telescope truss TST temperature |
TTRUWTBT [1] |
11.0 |
float |
[deg] Telescope truss WTB temperature |
TTRUWTTT [1] |
11.7 |
float |
[deg] Telescope truss WTT temperature |
ALARM [1] |
F |
bool |
UPS major alarm or check battery |
ALARM-ON [1] |
F |
bool |
UPS active alarm condition |
BATTERY [1] |
100.0 |
float |
[%] UPS Battery left |
SECLEFT [1] |
5682.0 |
float |
[s] UPS Seconds left |
UPSSTAT [1] |
System Normal - On Line(7) |
str |
UPS Status |
INAMPS [1] |
65.7 |
float |
[A] UPS total input current |
OUTWATTS [1] |
4700.0,6900.0,4100.0 |
str |
[W] UPS Phase A, B, C output watts |
COMPDEW [1] |
-12.1 |
float |
[deg C] Computer room dewpoint |
COMPHUM [1] |
7.7 |
float |
[%] Computer room humidity |
COMPAMB [1] |
19.3 |
float |
[deg C] Computer room ambient temperature |
COMPTEMP [1] |
24.9 |
float |
[deg C] Computer room hygrometer temperature |
DEWPOINT [1] |
5.7 |
float |
[deg C] (outside) dewpoint |
HUMIDITY [1] |
7.0 |
float |
[%] (outside) humidity |
PRESSURE [1] |
795.0 |
float |
[torr] (outside) air pressure |
OUTTEMP [1] |
0.0 |
float |
[deg C] outside temperature |
WINDDIR [1] |
87.0 |
float |
[deg] wind direction |
WINDSPD [1] |
19.1 |
float |
[m/s] wind speed |
GUST [1] |
14.4 |
float |
[m/s] Wind gusts speed |
AMNIENTN [1] |
13.4 |
float |
[deg C] ambient temperature north |
CFLOOR [1] |
8.1 |
float |
[deg C] temperature on C floor |
NWALLIN [1] |
13.6 |
float |
[deg C] temperature at north wall inside |
NWALLOUT [1] |
8.8 |
float |
[deg C] temperature at north wall outside |
WWALLIN [1] |
12.8 |
float |
[deg C] temperature at west wall inside |
WWALLOUT [1] |
9.4 |
float |
[deg C] temperature at west wall outside |
AMBIENTS [1] |
14.6 |
float |
[deg C] ambient temperature south |
FLOOR [1] |
12.4 |
float |
[deg C] temperature at floor (LCR) |
EWALLCMP [1] |
10.2 |
float |
[deg C] temperature at east wall, computer room |
EWALLCOU [1] |
9.5 |
float |
[deg C] temperature at east wall, Coude room |
ROOF [1] |
9.9 |
float |
[deg C] temperature on roof |
ROOFAMB [1] |
9.9 |
float |
[deg C] ambient temperature on roof |
DOMEBLOW [1] |
12.1 |
float |
[deg C] temperature at dome back, lower |
DOMEBUP [1] |
12.5 |
float |
[deg C] temperature at dome back, upper |
DOMELLOW [1] |
14.4 |
float |
[deg C] temperature at dome left, lower |
DOMELUP [1] |
19.4 |
float |
[deg C] temperature at dome left, upper |
DOMERLOW [1] |
12.3 |
float |
[deg C] temperature at dome right, lower |
DOMERUP [1] |
12.8 |
float |
[deg C] temperature at dome right, upper |
PLATFORM [1] |
15.3 |
float |
[deg C] temperature at platform |
SHACKC [1] |
15.2 |
float |
[deg C] temperature at shack ceiling |
SHACKW [1] |
13.2 |
float |
[deg C] temperature at shack wall |
STAIRSL [1] |
12.6 |
float |
[deg C] temperature at stairs, lower |
STAIRSM [1] |
13.3 |
float |
[deg C] temperature at stairs, mid |
STAIRSU [1] |
13.6 |
float |
[deg C] temperature at stairs, upper |
TELBASE [1] |
8.5 |
float |
[deg C] temperature at telescope base |
UTILWALL [1] |
11.6 |
float |
[deg C] temperature at utility room wall |
UTILROOM [1] |
12.4 |
float |
[deg C] temperature in utilitiy room |
EXCLUDED |
str |
Components excluded from this exposure |
|
NSPEC |
500 |
int |
Number of spectra |
WAVEMIN |
5760.0 |
float |
First wavelength [Angstroms] |
WAVEMAX |
7620.0 |
float |
Last wavelength [Angstroms] |
WAVESTEP |
0.8 |
float |
Wavelength step size [Angstroms] |
SPECTER |
0.10.0 |
str |
|
IN_PSF |
SPECPROD/exposures/20201220/00068978/psf-r0-00068978.fits |
str |
Input sp |
IN_IMG |
SPECPROD/preproc/20201220/00068978/preproc-r0-00068978.fits |
str |
Input image |
ORIG_PSF [1] |
SPECPROD/calibnight/20201220/psfnight-r0-20201220.fits |
str |
|
CHI2PDF |
1.088304575350556 |
float |
|
BUNIT |
str |
adimensional quantity to divide to flatfield a frame |
|
TCSPIDEC [1] |
1.0,0.0,0.0,0.0 |
str |
TCS PI settings (P, I (gain, error window, satu |
TCSPIRA [1] |
1.0,0.0,0.0,0.0 |
str |
TCS PI settings (P, I (gain, error window, satu |
CALTHUM [1] |
15.32 |
float |
dome flat humidity from telemetry |
TCSGRA [1] |
0.3 |
float |
TCS simple gain (RA) |
EXPFHUM [1] |
17.64312009333441 |
float |
exposure humidity from flat fit |
TCSMFRA [1] |
1 |
int |
TCS moving filter length (RA) |
SEQSTART [1] |
2021-03-09T00:34:23.379721 |
str |
Start time of sequence processing |
TCSKRA [1] |
0.3 0.003 0.00003 |
str |
TCS Kalman (RA) |
MOONSEP [1] |
171.522 |
float |
[deg] Moon Separation |
NTSSURVY [1] |
na |
str |
NTS survey name |
TCSKDEC [1] |
0.3 0.003 0.00003 |
str |
TCS Kalman (dec) |
TCSMFDEC [1] |
1 |
int |
TCS moving filter length (dec) |
TCSGDEC [1] |
0.3 |
float |
TCS simple gain (dec) |
SUNDEC [1] |
-4.488284 |
float |
[deg] Sun declination at start of exposure |
SUNRA [1] |
349.569123 |
float |
[deg] Sun RA at start of exposure |
CALFHUM [1] |
14.32350765258646 |
float |
dome flat humidity from flat fit |
EXPTHUM [1] |
16.63 |
float |
exposure humidity from telemetry |
EPOCH [1] |
2000.0 |
float |
Epoch of observation |
SKYLEVEL [1] |
6.268 |
float |
[counts?] ETC sky level |
TRANSPAR [1] |
None |
Unknown |
ETC/PM transparency |
SEEING [1] |
None |
Unknown |
[arcsec] ETC/PM seeing |
Data: FITS image [float32, 2751x500]
HDU1
EXTNAME = IVAR
Inverse variance (1/sigma^2) of the fiber flat field in HDU0.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
2751 |
int |
|
NAXIS2 |
500 |
int |
|
BUNIT |
str |
inverse variance, adimensional |
|
CHECKSUM |
kdmLldmJkdmJkdmJ |
str |
HDU checksum updated 2022-02-01T22:58:01 |
DATASUM |
4118276244 |
str |
data unit checksum updated 2022-02-01T22:58:01 |
Data: FITS image [float32, 2751x500]
HDU2
EXTNAME = MASK
Mask of the fiberflat; 0=good. See the bitmask documentation page for the definition of the bits. Prior to desispec/0.24.0 and software release 18.9, the MASK HDU was compressed.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
2751 |
int |
|
NAXIS2 |
500 |
int |
|
BSCALE |
1 |
int |
|
BZERO |
2147483648 |
int |
|
CHECKSUM |
RHdLRGcIRGcIRGcI |
str |
HDU checksum updated 2022-02-01T22:58:02 |
DATASUM |
687834 |
str |
data unit checksum updated 2022-02-01T22:58:02 |
Data: FITS image [int32, 2751x500]
HDU3
EXTNAME = MEANSPEC
Average flat lamp spectrum of fibers in this camera frame. The fiber flat field is in first approximation the ratio of the measured spectra to this mean spectrum (in practice we use a deconvolved mean spectrum and reconvolve it with the resolution of each fiber). The units are electrons per Angstrom.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
2751 |
int |
|
BUNIT |
electron/Angstrom |
str |
|
CHECKSUM |
4TMJ6RKJ4RKJ4RKJ |
str |
HDU checksum updated 2022-02-01T22:58:02 |
DATASUM |
2617283155 |
str |
data unit checksum updated 2022-02-01T22:58:02 |
Data: FITS image [float32, 2751]
HDU4
EXTNAME = WAVELENGTH
Wavelength grid in Angstrom used by this fiber flat field. Note that contrary to the science frame, this wavelength array is in the observer frame. In consequence, one has to first convert its wavelength to the solar barycenter frame before using this data to flat field a science exposure. See the frame WAVELENGTH documentation for more details.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
2751 |
int |
|
BUNIT |
Angstrom |
str |
|
CHECKSUM |
5qI85oG75oG75oG7 |
str |
HDU checksum updated 2022-02-01T22:58:02 |
DATASUM |
2458411755 |
str |
data unit checksum updated 2022-02-01T22:58:02 |
Data: FITS image [float32, 2751]
HDU5
EXTNAME = FIBERMAP
Fibermap with information about the fiber status.
Required Header Keywords
Required Header Keywords Table
KEY |
Example Value |
Type |
Comment |
---|---|---|---|
NAXIS1 |
369 |
int |
length of dimension 1 |
NAXIS2 |
500 |
int |
length of dimension 2 |
ENCODING |
ascii |
str |
|
CHECKSUM |
aBFAbA93aAE9aA99 |
str |
HDU checksum updated 2022-02-01T22:58:02 |
DATASUM |
3386980400 |
str |
data unit checksum updated 2022-02-01T22:58:02 |
Required Data Table Columns
Name |
Type |
Units |
Description |
---|---|---|---|
TARGETID |
int64 |
Unique DESI target ID |
|
PETAL_LOC |
int16 |
Petal location [0-9] |
|
DEVICE_LOC |
int32 |
Device location on focal plane [0-523] |
|
LOCATION |
int64 |
Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC |
|
FIBER |
int32 |
Fiber ID on the CCDs [0-4999] |
|
FIBERSTATUS |
int32 |
Fiber status mask. 0=good |
|
TARGET_RA |
float64 |
deg |
Barycentric right ascension in ICRS |
TARGET_DEC |
float64 |
deg |
Barycentric declination in ICRS |
PMRA |
float32 |
mas yr^-1 |
proper motion in the +RA direction (already including cos(dec)) |
PMDEC |
float32 |
mas yr^-1 |
Proper motion in the +Dec direction |
REF_EPOCH |
float32 |
yr |
Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia |
LAMBDA_REF |
float32 |
Angstrom |
Requested wavelength at which targets should be centered on fibers |
FA_TARGET |
int64 |
Targeting bit internally used by fiberassign (linked with FA_TYPE) |
|
FA_TYPE |
binary |
Fiberassign internal target type (science, standard, sky, safe, suppsky) |
|
OBJTYPE |
char[3] |
Object type: TGT, SKY, NON, BAD |
|
FIBERASSIGN_X |
float32 |
mm |
Fiberassign expected CS5 X location on focal plane |
FIBERASSIGN_Y |
float32 |
mm |
Fiberassign expected CS5 Y location on focal plane |
PRIORITY |
int32 |
Target current priority |
|
SUBPRIORITY |
float64 |
Random subpriority [0-1) to break assignment ties |
|
OBSCONDITIONS |
int32 |
Bitmask of allowed observing conditions |
|
RELEASE |
int16 |
Imaging surveys release ID |
|
BRICKNAME [1] |
char[8] |
Brick name from tractor input |
|
BRICKID |
int64 |
Brick ID from tractor input |
|
BRICK_OBJID |
int64 |
Imaging Surveys OBJID on that brick |
|
MORPHTYPE |
char[4] |
Imaging Surveys morphological type from Tractor |
|
EBV |
float32 |
mag |
Galactic extinction E(B-V) reddening from SFD98 |
FLUX_G |
float32 |
nanomaggy |
Flux in the Legacy Survey g-band (AB) |
FLUX_R |
float32 |
nanomaggy |
Flux in the Legacy Survey r-band (AB) |
FLUX_Z |
float32 |
nanomaggy |
Flux in the Legacy Survey z-band (AB) |
FLUX_W1 |
float32 |
nanomaggy |
WISE flux in W1 (AB) |
FLUX_W2 |
float32 |
nanomaggy |
WISE flux in W2 (AB) |
FLUX_IVAR_G |
float32 |
nanomaggy^-2 |
Inverse variance of FLUX_G (AB) |
FLUX_IVAR_R |
float32 |
nanomaggy^-2 |
Inverse variance of FLUX_R (AB) |
FLUX_IVAR_Z |
float32 |
nanomaggy^-2 |
Inverse variance of FLUX_Z (AB) |
FLUX_IVAR_W1 |
float32 |
nanomaggy^-2 |
Inverse variance of FLUX_W1 (AB) |
FLUX_IVAR_W2 |
float32 |
nanomaggy^-2 |
Inverse variance of FLUX_W2 (AB) |
FIBERFLUX_G |
float32 |
nanomaggy |
Predicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing |
FIBERFLUX_R |
float32 |
nanomaggy |
Predicted r-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing |
FIBERFLUX_Z |
float32 |
nanomaggy |
Predicted z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing |
FIBERTOTFLUX_G |
float32 |
nanomaggy |
Predicted g-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing |
FIBERTOTFLUX_R |
float32 |
nanomaggy |
Predicted r-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing |
FIBERTOTFLUX_Z |
float32 |
nanomaggy |
Predicted z-band flux within a fiber of diameter 1.5 arcsec from all sources at this location in 1 arcsec Gaussian seeing |
MASKBITS [1] |
int16 |
Bitwise mask from the imaging indicating potential issue or blending |
|
SERSIC [1] |
float32 |
Power-law index for the Sersic profile model (MORPHTYPE=’SER’) |
|
SHAPE_R [1] |
float32 |
arcsec |
Half-light radius of galaxy model (>0) |
SHAPE_E1 [1] |
float32 |
Ellipticity component 1 of galaxy model for galaxy type MORPHTYPE |
|
SHAPE_E2 [1] |
float32 |
Ellipticity component 2 of galaxy model for galaxy type MORPHTYPE |
|
REF_ID |
int64 |
Tyc1*1,000,000+Tyc2*10+Tyc3 for Tycho-2; |
|
REF_CAT [1] |
char[2] |
Reference catalog source for star: ‘T2’ for Tycho-2, ‘G2’ for Gaia DR2, ‘L2’ for the SGA, empty otherwise |
|
GAIA_PHOT_G_MEAN_MAG [1] |
float32 |
mag |
Gaia G band magnitude |
GAIA_PHOT_BP_MEAN_MAG [1] |
float32 |
mag |
Gaia BP band magnitude |
GAIA_PHOT_RP_MEAN_MAG [1] |
float32 |
mag |
Gaia RP band magnitude |
PARALLAX [1] |
float32 |
mas |
Reference catalog parallax |
PHOTSYS |
char[1] |
‘N’ for the MzLS/BASS photometric system, ‘S’ for DECaLS |
|
PRIORITY_INIT |
int64 |
Target initial priority from target selection bitmasks and OBSCONDITIONS |
|
NUMOBS_INIT |
int64 |
Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS |
|
DESI_TARGET |
int64 |
DESI (dark time program) target selection bitmask |
|
BGS_TARGET |
int64 |
BGS (Bright Galaxy Survey) target selection bitmask |
|
MWS_TARGET |
int64 |
Milky Way Survey targeting bits |
|
SCND_TARGET [1] |
int64 |
Target selection bitmask for secondary programs |
|
PLATE_RA [1] |
float64 |
deg |
Barycentric Right Ascension in ICRS to be used by PlateMaker |
PLATE_DEC [1] |
float64 |
deg |
Barycentric Declination in ICRS to be used by PlateMaker |
NUM_ITER |
int64 |
Number of positioner iterations |
|
FIBER_X [1] |
float64 |
mm |
CS5 X location requested by PlateMaker |
FIBER_Y [1] |
float64 |
mm |
CS5 Y location requested by PlateMaker |
DELTA_X [1] |
float64 |
mm |
CS5 X requested minus actual position |
DELTA_Y [1] |
float64 |
mm |
CS5 Y requested minus actual position |
FIBER_RA |
float64 |
deg |
RA of actual fiber position |
FIBER_DEC |
float64 |
deg |
DEC of actual fiber position |
EXPTIME [1] |
float64 |
s |
Length of time shutter was open |
NUMOBS_MORE [1] |
int32 |
Number of additional observations needed |
|
NUMTARGET [1] |
int16 |
Total number of targets that this positioner covered |
|
SPECTROID [1] |
int32 |
Hardware ID of spectrograph (not used) |
|
HPXPIXEL [1] |
int64 |
HEALPixel containing this location at NSIDE=64 in the NESTED scheme |
|
PMDEC_IVAR [1] |
float32 |
yr^2 mas^-2 |
Inverse variance of PMDEC |
MW_TRANSMISSION_Z [1] |
float32 |
Milky Way dust transmission in LS z-band |
|
MW_TRANSMISSION_G [1] |
float32 |
Milky Way dust transmission in LS g-band |
|
MW_TRANSMISSION_R [1] |
float32 |
Milky Way dust transmission in LS r-band |
|
PMRA_IVAR [1] |
float32 |
yr^2 mas^-2 |
Inverse variance of PMRA |