fiberflat-CAMERA-EXPID.fits

Summary:

This file contains the fiberflat such that newflux = rawflux/fiberflat.

Naming Convention:

fiberflat-{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:

fiberflat-[brz][0-9]-[0-9]{8}\.fits

File Type:

FITS, 16 MB

Contents

Number	EXTNAME	Type	Contents
HDU0	FIBERFLAT	IMAGE	fiberflat[nspec, nwave]
HDU1	IVAR	IMAGE	inverse variance of fiberflat
HDU2	MASK	IMAGE	bitmask of fiberflat (0=good)
HDU3	MEANSPEC	IMAGE	average spectrum[nwave]
HDU4	WAVELENGTH	IMAGE	wavelength grid[nwave] in Angstroms
HDU5	FIBERMAP	BINTABLE	fibermap

Note: the FIBERMAP HDU may be dropped from future versions

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 the fiber flat derived for the flat exposure EXPID. It is an intermediate file used as input for the nightly fiber flat.

Required Header Keywords

Header keywords are inherited from the input Frame file.

Required Header Keywords Table

KEY	Example Value	Type	Comment
NAXIS1	2326	int
NAXIS2	500	int
EXPID	68979	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	2020-12-20T22:24:15.672815	str	[UTC] Observation data and start time
TIME-OBS	22:24:15.672815	str	[UTC] Observation start time
MJD-OBS	59203.93351473	float	Modified Julian Date of observation
ST	20:57:41.340	str	Local Sidereal time at observation start (HH:MM
EXPTIME	120.037	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	2020-12-09T21:23:19.307761	str	Time when CCD voltage was turned on
VCCDSEC	954226.0	float	[s] CCD on time in seconds
EQUINOX	2000.0	float	Epoch of observation
SPECGRPH	8	int	Spectrograph logical name (SP)
SPECID	2	int	Spectrograph serial number (SM)
FEEBOX	lbnl050	str	CCD Controller serial number
VESSEL	8	int	Cryostat serial number
FEEVER	v20160312	str	CCD Controller version
DETFLVER [1]	FAILED: invalid argument for get command	str	CCD Controller detector f
FEEPOWER	ON	str	FEE power status
FEEDMASK	2134851391	int	FEE dac mask
FEECMASK	1048575	int	FEE clk mask
CCDTEMP	-135.3315	float	[deg C] CCD controller CCD temperature
RADESYS	FK5	str	Coordinate reference frame of major/minor axes
FILENAME	/exposures/desi/specs/20201220/00068979/sp9-00068979.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
AMPSECB	[4114:2058, 1:2064]	str	AMP section for quadrant B
DAC16	39.9961,39.3162	str	[V] set value, measured value
CLOCK8	9.9992,2.9993	str	[V] high rail, low rail
PRRSECD	[2193:4249, 4194:4194]	str	Row prescan section for quadrant D
CCDPREP	purge,clear	str	CCD prep actions
CLOCK10	9.9992,2.9993	str	[V] high rail, low rail
DAC17	20.0008,12.2488	str	[V] set value, measured value
ORSECB	[2193:4249, 2066:2097]	str	Row overscan section for quadrant B
DAC15	0.0,0.0148	str	[V] set value, measured value
ORSECD	[2193:4249, 2098:2129]	str	Row bias section for quadrant D
DIGITIME	47.5846	float	[s] Time to digitize image
BIASSECA	[2065:2128, 2:2065]	str	Bias section for quadrant A
CLOCK9	9.9992,2.9993	str	[V] high rail, low rail
CLOCK18	9.0,0.9999	str	[V] high rail, low rail
CAMERA	r8	str	Camera name
CLOCK17	9.0,0.9999	str	[V] high rail, low rail
CLOCK5	9.9999,0.0	str	[V] high rail, low rail
TRIMSECD	[2193:4249, 2130:4193]	str	Trim section for quadrant D
DETSECD	[2058:4114, 2065:4128]	str	Detector section for quadrant D
DAC0	-9.0002,-8.9507	str	[V] set value, measured value
CLOCK15	9.9992,2.9993	str	[V] high rail, low rail
TRIMSECA	[8:2064, 2:2065]	str	Trim section for quadrant A
BIASSECB	[2129:2192, 2:2065]	str	Bias section for quadrant B
CLOCK11	9.9992,2.9993	str	[V] high rail, low rail
CLOCK12	9.9992,2.9993	str	[V] high rail, low rail
AMPSECD	[4114:2058, 4128:2065]	str	AMP section for quadrant D
CLOCK4	9.9999,0.0	str	[V] high rail, low rail
PRRSECB	[2193:4249, 1:1]	str	Row prescan section for quadrant B
CCDSECD	[2058:4114, 2065:4128]	str	CCD section for quadrant D
CCDTMING	default_lbnl_timing_20180905.txt	str	CCD timing file
TRIMSECB	[2193:4249, 2:2065]	str	Trim section for quadrant B
CCDSIZE	4194,4256	str	CCD size in pixels (rows, columns)
PGAGAIN	3	int	Controller gain
PRESECD	[4250:4256, 2130:4193]	str	Prescan section for quadrant D
CLOCK6	9.9999,0.0	str	[V] high rail, low rail
CLOCK13	9.9992,2.9993	str	[V] high rail, low rail
DAC7	5.9998,6.028	str	[V] set value, measured value
DATASECA	[8:2064, 2:2065]	str	Data section for quadrant A
CRYOTEMP [1]	162.97	float	[deg K] Cryostat CCD temperature
OFFSET2	0.4000000059604645,-8.9198	str	[V] set value, measured value
OFFSET6	2.0,6.0437	str	[V] set value, measured value
DELAYS	20, 20, 25, 40, 7, 3000, 7, 7, 7, 7	str	[10] Delay settings
BIASSECD	[2129:2192, 2130:4193]	str	Bias section for quadrant D
PRRSECA	[8:2064, 1:1]	str	Row prescan section for quadrant A
TRIMSECC	[8:2064, 2130:4193]	str	Trim section for quadrant C
CLOCK3	-2.0001,3.9999	str	[V] high rail, low rail
CCDNAME	CCDSM2R	str	CCD name
DAC9	-25.0003,-24.768	str	[V] set value, measured value
CCDSECC	[1:2057, 2065:4128]	str	CCD section for quadrant C
ORSECA	[8:2064, 2066:2097]	str	Row overscan section for quadrant A
DAC5	5.9998,6.0543	str	[V] set value, measured value
CCDSECB	[2058:4114, 1:2064]	str	CCD section for quadrant B
DETSECB	[2058:4114, 1:2064]	str	Detector section for quadrant B
OFFSET0	0.4000000059604645,-8.9507	str	[V] set value, measured value
SETTINGS	detectors_sm_20191211.json	str	Name of DESI CCD settings file
DAC11	-25.0003,-24.8422	str	[V] set value, measured value
BIASSECC	[2065:2128, 2130:4193]	str	Bias section for quadrant C
CASETEMP	60.4294	float	[deg C] CCD controller case temperature
DAC10	-25.0003,-24.7086	str	[V] set value, measured value
DAC1	-9.0002,-8.9198	str	[V] set value, measured value
DAC14	0.0,0.0594	str	[V] set value, measured value
DETECTOR	M1-46	str	Detector (ccd) identification
CDSPARMS	400, 400, 8, 2000	str	CDS parameters
OFFSET3	0.4000000059604645,-8.8992	str	[V] set value, measured value
DATASECB	[2193:4249, 2:2065]	str	Data section for quadrant B
ORSECC	[8:2064, 2098:2129]	str	Row overscan section for quadrant C
CRYOPRES [1]	9.084e-08	str	[mb] Cryostat pressure (IP)
AMPSECA	[1:2057, 1:2064]	str	AMP section for quadrant A
OFFSET7	2.0,6.028	str	[V] set value, measured value
DAC4	5.9998,6.028	str	[V] set value, measured value
DATASECC	[8:2064, 2130:4193]	str	Data section for quadrant C
PRESECC	[1:7, 2130:4193]	str	Prescan section for quadrant C
CLOCK16	9.9999,3.0	str	[V] high rail, low rail
CLOCK1	9.9999,0.0	str	[V] high rail, low rail
PRESECB	[4250:4256, 2:2065]	str	Prescan section for quadrant B
DAC12	0.0,0.0297	str	[V] set value, measured value
DAC8	-25.0003,-24.9312	str	[V] set value, measured value
OFFSET4	2.0,6.028	str	[V] set value, measured value
DAC2	-9.0002,-8.9198	str	[V] set value, measured value
CCDCFG	default_lbnl_20190717.cfg	str	CCD configuration file
BLDTIME	0.3585	float	[s] Time to build image
PRESECA	[1:7, 2:2065]	str	Prescan section for quadrant A
DATASECD	[2193:4249, 2130:4193]	str	Data section for quadrant D
DETSECC	[1:2057, 2065:4128]	str	Detector section for quadrant C
PRRSECC	[8:2064, 4194:4194]	str	Row prescan section for quadrant C
DAC6	5.9998,6.0437	str	[V] set value, measured value
DETSECA	[1:2057, 1:2064]	str	Detector section for quadrant A
CLOCK2	9.9999,0.0	str	[V] high rail, low rail
DAC3	-9.0002,-8.9095	str	[V] set value, measured value
OFFSET1	0.4000000059604645,-8.9198	str	[V] set value, measured value
AMPSECC	[1:2057, 4128:2065]	str	AMP section for quadrant C
CLOCK7	-2.0001,3.9999	str	[V] high rail, low rail
DAC13	0.0,0.0148	str	[V] set value, measured value
CCDSECA	[1:2057, 1:2064]	str	CCD section for quadrant A
OFFSET5	2.0,6.0543	str	[V] set value, measured value
CLOCK14	9.9992,2.9993	str	[V] high rail, low rail
CLOCK0	9.9999,0.0	str	[V] high rail, low rail
CPUTEMP	60.4394	float	[deg C] CCD controller CPU temperature
REQTIME	120.0	float	[s] Requested exposure time
OBSID	kp4m20201220t222415	str	Unique observation identifier
PROCTYPE	RAW	str	Data processing level
PRODTYPE	image	str	Data product type
CHECKSUM	bSeTbScSbScSbScS	str	HDU checksum updated 2022-01-29T01:14:36
DATASUM	1818512066	str	data unit checksum updated 2022-01-29T01:14:36
GAINA	1.627	float	e/ADU (gain applied to image)
SATULEVA	65535.0	float	saturation or non lin. level, in ADU, inc. bias
OSTEPA	0.632482737491955	float	ADUs (max-min of median overscan per row)
OMETHA	AVERAGE	str	use average overscan
OVERSCNA	1984.644911356943	float	ADUs (gain not applied)
OBSRDNA	2.480943789810065	float	electrons (gain is applied)
SATUELEA	103396.4277292223	float	saturation or non lin. level, in electrons
GAINB	1.482	float	e/ADU (gain applied to image)
SATULEVB	65535.0	float	saturation or non lin. level, in ADU, inc. bias
OSTEPB	0.5400817486224696	float	ADUs (max-min of median overscan per row)
OMETHB	AVERAGE	str	use average overscan
OVERSCNB	1980.886896481526	float	ADUs (gain not applied)
OBSRDNB	2.179271146346672	float	electrons (gain is applied)
SATUELEB	94187.19561941437	float	saturation or non lin. level, in electrons
GAINC	1.581	float	e/ADU (gain applied to image)
SATULEVC	65535.0	float	saturation or non lin. level, in ADU, inc. bias
OSTEPC	0.6331518428269192	float	ADUs (max-min of median overscan per row)
OMETHC	AVERAGE	str	use average overscan
OVERSCNC	1965.76250622263	float	ADUs (gain not applied)
OBSRDNC	2.484447923351728	float	electrons (gain is applied)
SATUELEC	100502.964477662	float	saturation or non lin. level, in electrons
GAIND	1.589	float	e/ADU (gain applied to image)
SATULEVD	65535.0	float	saturation or non lin. level, in ADU, inc. bias
OSTEPD	0.6401253297517542	float	ADUs (max-min of median overscan per row)
OMETHD	AVERAGE	str	use average overscan
OVERSCND	1987.590453491951	float	ADUs (gain not applied)
OBSRDND	2.576419983467696	float	electrons (gain is applied)
SATUELED	100976.8337694013	float	saturation or non lin. level, in electrons
FIBERMIN	4000	int
LONGSTRN	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]	68979	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	2	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]	13.267	float	[deg] Average Telescope truss temperature (only
PMIRTEMP [1]	7.35	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]	-9.830944	float	[deg] Moon declination at start of exposure
MOONRA [1]	350.511461	float	[deg] Moon RA at start of exposure
MOUNTAZ [1]	73.49407	float	[deg] Mount azimuth angle
MOUNTDEC [1]	31.962703	float	[deg] Mount declination
MOUNTEL [1]	41.035778	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]	-73.492813	float	[deg] Parallactic angle
SKYDEC [1]	31.962703	float	[deg] Telescope declination (pointing on sky)
SKYRA [1]	12.901561	float	[deg] Telescope right ascension (pointing on sk
TARGTDEC [1]	31.963299	float	[deg] Target declination (to TCS)
TARGTRA [1]	6.305086	float	[deg] Target right ascension (to TCS)
TARGTAZ [1]	75.558672	float	[deg] Target azimuth
TARGTEL [1]	46.429343	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]	48.964222	float	[deg] Telescope zenith distance
TCSST [1]	20:57:41.291	str	Local Sidereal time reported by TCS (HH:MM:SS)
TCSMJD [1]	59203.933945	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]	-18.2	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]	5.5	float	[deg] Telescope air out temperature
TAIRTEMP [1]	11.86	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]	7.4	float	[deg] Telescope dec bore temperature
TFLOWIN [1]	7.7	float	Telescope flow rate in
TFLOWOUT [1]	8.3	float	Telescope flow rate out
TGLYCOLI [1]	-1.8	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]	11.7	float	[deg] Telescope hinge W temperature
TPMAVERT [1]	7.304	float	[deg] Telescope mirror averagetemperature
TPMDESIT [1]	7.0	float	[deg] Telescope mirror desired temperature
TPMEIBT [1]	7.3	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]	7.2	float	[deg] Telescope mirror EOT temperature
TPMNIBT [1]	7.4	float	[deg] Telescope mirror NIB temperature
TPMNITT [1]	7.3	float	[deg] Telescope mirror NIT temperature
TPMNOBT [1]	7.7	float	[deg] Telescope mirror NOB temperature
TPMNOTT [1]	7.6	float	[deg] Telescope mirror NOT temperature
TPMRTDT [1]	6.96	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]	7.2	float	[deg] Telescope mirror SOT temperature
TPMSTAT [1]	soft air	str	Telescope mirror status
TPMWIBT [1]	7.2	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]	13.2	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]	11.5	float	[deg] Telescope truss ETT temperature
TTRUNTBT [1]	10.9	float	[deg] Telescope truss NTB temperature
TTRUNTTT [1]	11.8	float	[deg] Telescope truss NTT temperature
TTRUSTBT [1]	11.1	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]	13.6	float	[deg] Telescope truss TSB temperature
TTRUTSMT [1]	13.7	float	[deg] Telescope truss TSM temperature
TTRUTSTT [1]	12.5	float	[deg] Telescope truss TST temperature
TTRUWTBT [1]	10.9	float	[deg] Telescope truss WTB temperature
TTRUWTTT [1]	11.6	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]	5772.0	float	[s] UPS Seconds left
UPSSTAT [1]	System Normal - On Line(7)	str	UPS Status
INAMPS [1]	64.3	float	[A] UPS total input current
OUTWATTS [1]	4500.0,6800.0,4100.0	str	[W] UPS Phase A, B, C output watts
COMPDEW [1]	-12.0	float	[deg C] Computer room dewpoint
COMPHUM [1]	7.8	float	[%] Computer room humidity
COMPAMB [1]	19.4	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]	794.7	float	[torr] (outside) air pressure
OUTTEMP [1]	0.0	float	[deg C] outside temperature
WINDDIR [1]	82.0	float	[deg] wind direction
WINDSPD [1]	23.3	float	[m/s] wind speed
GUST [1]	18.1	float	[m/s] Wind gusts speed
AMNIENTN [1]	13.3	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]	12.3	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]	10.0	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]	19.3	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	https://github.com/desihub/specter
IN_PSF	SPECPROD/exposures/20201220/00068979/psf-r8-00068979.fits	str	Input sp
IN_IMG	SPECPROD/preproc/20201220/00068979/preproc-r8-00068979.fits	str
ORIG_PSF	SPECPROD/calibnight/20201220/psfnight-r8-20201220.fits	str
CHI2PDF	1.081598530118078	float
BUNIT		str	adimensional quantity to divide to flatfield a frame
SUNDEC [1]	18.640139	float	[deg] Sun declination at start of exposure
TCSKRA [1]	0.3 0.003 0.00003	str	TCS Kalman (RA)
SEQSTART [1]	2021-05-14T01:11:54.263801	str	Start time of sequence processing
TCSGDEC [1]	0.3	float	TCS simple gain (dec)
MOONSEP [1]	9.334	float	[deg] Moon Separation
TCSMFDEC [1]	1	int	TCS moving filter length (dec)
TCSMFRA [1]	1	int	TCS moving filter length (RA)
TCSGRA [1]	0.3	float	TCS simple gain (RA)
SUNRA [1]	51.089577	float	[deg] Sun RA at start of exposure
NTSSURVY [1]	na	str	NTS survey name
TCSKDEC [1]	0.3 0.003 0.00003	str	TCS Kalman (dec)
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
TRANSPAR [1]	None	Unknown	ETC/PM transparency
PMSEEING [1]	None	Unknown	[arcsec] PlateMaker GFAPROC seeing
PMTRANSP [1]	None	Unknown	[%] PlateMaker GFAPROC transparency
SEEING [1]	None	Unknown	[arcsec] ETC/PM seeing
SKYLEVEL [1]	8.153	float	[counts?] ETC sky level

Data: FITS image [float32, 2881x500]

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	2881	int
NAXIS2	500	int
BUNIT		str	inverse variance, adimensional
CHECKSUM	9PWhCOTZ9OTfAOTZ	str	HDU checksum updated 2021-07-07T18:12:11
DATASUM	1188137300	str	data unit checksum updated 2021-07-07T18:12:11

Data: FITS image [float32, 2881x500]

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	2881	int	Number of wavelengths
NAXIS2	500	int	Number of spectra
BSCALE	1	int
BZERO	2147483648	int
CHECKSUM	EGfjGGdhEGdhEGdh	str	HDU checksum updated 2021-07-07T18:12:11
DATASUM	722182	str	data unit checksum updated 2021-07-07T18:12:11

Data: FITS image [int32, 2881x500]

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	2881	int	Number of wavelengths
BUNIT	electron/Angstrom	str
CHECKSUM	CcfOCceNCceNCceN	str	HDU checksum updated 2021-07-07T18:12:12
DATASUM	1452506388	str	data unit checksum updated 2021-07-07T18:12:12

Data: FITS image [float32, 2881]

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	2881	int
BUNIT	Angstrom	str
CHECKSUM	kRaDlRa9kRaCkRa9	str	HDU checksum updated 2021-07-07T18:12:12
DATASUM	153633556	str	data unit checksum updated 2021-07-07T18:12:12

Data: FITS image [float32, 2881]

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
EXPID	68979	int
EXPFRAME	0	int
FLAVOR	science	str
SEQUENCE	Spectrographs	str
PURPOSE	Commissioning	str
PROGRAM	CALIB DESI-CALIB-00 LEDs only	str
PROPID	2019B-5000	str
OBSERVER	DESIObserver	str
LEAD	RunManager	str
INSTRUME	DESI	str
OBSERVAT	KPNO	str
OBS-LAT	31.96403	str
OBS-LONG	-111.59989	str
OBS-ELEV	2097.0	float
TELESCOP	KPNO 4.0-m telescope	str
CORRCTOR	DESI Corrector	str
NIGHT	20201220	int
TIMESYS	UTC	str
DATE-OBS	2020-12-20T22:24:15.672815	str
TIME-OBS	22:24:15.672815	str
MJD-OBS	59203.93351473	float
ST	20:57:41.340	str
EXPTIME	120.037	float
DELTARA	0.0	float
DELTADEC	0.0	float
VCCD	ON	str
VCCDON	2020-12-09T21:23:19.307761	str
VCCDSEC	954226.0	float
EQUINOX	2000.0	float
SPECGRPH	8	int
SPECID	2	int
FEEBOX	lbnl050	str
VESSEL	8	int
FEEVER	v20160312	str
DETFLVER [1]	FAILED: invalid argument for get command	str
FEEPOWER	ON	str
FEEDMASK	2134851391	int
FEECMASK	1048575	int
CCDTEMP	-135.3315	float
RADESYS	FK5	str
FILENAME	/exposures/desi/specs/20201220/00068979/sp9-00068979.fits.fz	str
DOSVER	trunk	str
OCSVER	1.2	float
CONSTVER	DESI:CURRENT	str
INIFILE	/data/msdos/dos_home/architectures/kpno/desi.ini	str
AMPSECB	[4114:2058, 1:2064]	str
DAC16	39.9961,39.3162	str
CLOCK8	9.9992,2.9993	str
PRRSECD	[2193:4249, 4194:4194]	str
CCDPREP	purge,clear	str
CLOCK10	9.9992,2.9993	str
DAC17	20.0008,12.2488	str
ORSECB	[2193:4249, 2066:2097]	str
DAC15	0.0,0.0148	str
ORSECD	[2193:4249, 2098:2129]	str
DIGITIME	47.5846	float
BIASSECA	[2065:2128, 2:2065]	str
CLOCK9	9.9992,2.9993	str
CLOCK18	9.0,0.9999	str
CAMERA	r8	str
CLOCK17	9.0,0.9999	str
CLOCK5	9.9999,0.0	str
TRIMSECD	[2193:4249, 2130:4193]	str
DETSECD	[2058:4114, 2065:4128]	str
DAC0	-9.0002,-8.9507	str
CLOCK15	9.9992,2.9993	str
TRIMSECA	[8:2064, 2:2065]	str
BIASSECB	[2129:2192, 2:2065]	str
CLOCK11	9.9992,2.9993	str
CLOCK12	9.9992,2.9993	str
AMPSECD	[4114:2058, 4128:2065]	str
CLOCK4	9.9999,0.0	str
PRRSECB	[2193:4249, 1:1]	str
CCDSECD	[2058:4114, 2065:4128]	str
CCDTMING	default_lbnl_timing_20180905.txt	str
TRIMSECB	[2193:4249, 2:2065]	str
CCDSIZE	4194,4256	str
PGAGAIN	3	int
PRESECD	[4250:4256, 2130:4193]	str
CLOCK6	9.9999,0.0	str
CLOCK13	9.9992,2.9993	str
DAC7	5.9998,6.028	str
DATASECA	[8:2064, 2:2065]	str
CRYOTEMP [1]	162.97	float
OFFSET2	0.4000000059604645,-8.9198	str
OFFSET6	2.0,6.0437	str
DELAYS	20, 20, 25, 40, 7, 3000, 7, 7, 7, 7	str
BIASSECD	[2129:2192, 2130:4193]	str
PRRSECA	[8:2064, 1:1]	str
TRIMSECC	[8:2064, 2130:4193]	str
CLOCK3	-2.0001,3.9999	str
CCDNAME	CCDSM2R	str
DAC9	-25.0003,-24.768	str
CCDSECC	[1:2057, 2065:4128]	str
ORSECA	[8:2064, 2066:2097]	str
DAC5	5.9998,6.0543	str
CCDSECB	[2058:4114, 1:2064]	str
DETSECB	[2058:4114, 1:2064]	str
OFFSET0	0.4000000059604645,-8.9507	str
SETTINGS	detectors_sm_20191211.json	str
DAC11	-25.0003,-24.8422	str
BIASSECC	[2065:2128, 2130:4193]	str
CASETEMP	60.4294	float
DAC10	-25.0003,-24.7086	str
DAC1	-9.0002,-8.9198	str
DAC14	0.0,0.0594	str
DETECTOR	M1-46	str
CDSPARMS	400, 400, 8, 2000	str
OFFSET3	0.4000000059604645,-8.8992	str
DATASECB	[2193:4249, 2:2065]	str
ORSECC	[8:2064, 2098:2129]	str
CRYOPRES [1]	9.084e-08	str
AMPSECA	[1:2057, 1:2064]	str
OFFSET7	2.0,6.028	str
DAC4	5.9998,6.028	str
DATASECC	[8:2064, 2130:4193]	str
PRESECC	[1:7, 2130:4193]	str
CLOCK16	9.9999,3.0	str
CLOCK1	9.9999,0.0	str
PRESECB	[4250:4256, 2:2065]	str
DAC12	0.0,0.0297	str
DAC8	-25.0003,-24.9312	str
OFFSET4	2.0,6.028	str
DAC2	-9.0002,-8.9198	str
CCDCFG	default_lbnl_20190717.cfg	str
BLDTIME	0.3585	float
PRESECA	[1:7, 2:2065]	str
DATASECD	[2193:4249, 2130:4193]	str
DETSECC	[1:2057, 2065:4128]	str
PRRSECC	[8:2064, 4194:4194]	str
DAC6	5.9998,6.0437	str
DETSECA	[1:2057, 1:2064]	str
CLOCK2	9.9999,0.0	str
DAC3	-9.0002,-8.9095	str
OFFSET1	0.4000000059604645,-8.9198	str
AMPSECC	[1:2057, 4128:2065]	str
CLOCK7	-2.0001,3.9999	str
DAC13	0.0,0.0148	str
CCDSECA	[1:2057, 1:2064]	str
OFFSET5	2.0,6.0543	str
CLOCK14	9.9992,2.9993	str
CLOCK0	9.9999,0.0	str
CPUTEMP	60.4394	float
REQTIME	120.0	float
OBSID	kp4m20201220t222415	str
PROCTYPE	RAW	str
PRODTYPE	image	str
GAINA	1.627	float
SATULEVA	65535.0	float
OSTEPA	0.632482737491955	float
OMETHA	AVERAGE	str
OVERSCNA	1984.644911356943	float
OBSRDNA	2.480943789810065	float
SATUELEA	103396.4277292223	float
GAINB	1.482	float
SATULEVB	65535.0	float
OSTEPB	0.5400817486224696	float
OMETHB	AVERAGE	str
OVERSCNB	1980.886896481526	float
OBSRDNB	2.179271146346672	float
SATUELEB	94187.19561941437	float
GAINC	1.581	float
SATULEVC	65535.0	float
OSTEPC	0.6331518428269192	float
OMETHC	AVERAGE	str
OVERSCNC	1965.76250622263	float
OBSRDNC	2.484447923351728	float
SATUELEC	100502.964477662	float
GAIND	1.589	float
SATULEVD	65535.0	float
OSTEPD	0.6401253297517542	float
OMETHD	AVERAGE	str
OVERSCND	1987.590453491951	float
OBSRDND	2.576419983467696	float
SATUELED	100976.8337694013	float
FIBERMIN	4000	int
LONGSTRN	OGIP 1.0	str
MODULE	CI	str
FRAMES	None	Unknown
COSMSPLT	F	bool
MAXSPLIT	0	int
SPLITIDS [1]	68979	str
OBSTYPE	FLAT	str
MANIFEST	F	bool
OBJECT		str
SEQID	3 requests	str
SEQNUM	2	int
SEQTOT	3	int
OPENSHUT	None	Unknown
CAMSHUT	open	str
WHITESPT [1]	T	bool
ZENITH [1]	F	bool
SEANNEX [1]	F	bool
BEYONDP [1]	F	bool
FIDUCIAL [1]	off	str
AIRMASS [1]	1.521306	float
FOCUS [1]	1163.9,-689.8,370.4,13.8,24.2,-0.0	str
TRUSTEMP [1]	13.267	float
PMIRTEMP [1]	7.35	float
PMREADY [1]	F	bool
PMCOVER [1]	open	str
PMCOOL [1]	on	str
DOMSHUTU [1]	not open	str
DOMSHUTL [1]	not open	str
DOMLIGHH [1]	off	str
DOMLIGHL [1]	off	str
DOMEAZ [1]	253.289	float
DOMINPOS [1]	F	bool
GUIDOFFR [1]	0.0	float
GUIDOFFD [1]	-0.0	float
MOONDEC [1]	-9.830944	float
MOONRA [1]	350.511461	float
MOUNTAZ [1]	73.49407	float
MOUNTDEC [1]	31.962703	float
MOUNTEL [1]	41.035778	float
MOUNTHA [1]	-58.479517	float
INCTRL [1]	F	bool
INPOS [1]	T	bool
MNTOFFD [1]	-0.0	float
MNTOFFR [1]	-0.0	float
PARALLAC [1]	-73.492813	float
SKYDEC [1]	31.962703	float
SKYRA [1]	12.901561	float
TARGTDEC [1]	31.963299	float
TARGTRA [1]	6.305086	float
TARGTAZ [1]	75.558672	float
TARGTEL [1]	46.429343	float
TRGTOFFD [1]	0.0	float
TRGTOFFR [1]	0.0	float
ZD [1]	48.964222	float
TCSST [1]	20:57:41.291	str
TCSMJD [1]	59203.933945	float
ADCCORR	F	bool
ADC1PHI [1]	114.980003	float
ADC2PHI [1]	162.869907	float
ADC1HOME [1]	F	bool
ADC2HOME [1]	F	bool
ADC1NREV [1]	0.0	float
ADC2NREV [1]	-1.0	float
ADC1STAT [1]	STOPPED	str
ADC2STAT [1]	STOPPED	str
HEXPOS [1]	1163.9,-689.8,370.4,13.8,24.2,-0.0	str
HEXTRIM [1]	0.0,0.0,0.0,0.0,0.0,0.0	str
ROTOFFST [1]	0.0	float
ROTENBLD [1]	T	bool
ROTRATE [1]	0.0	float
RESETROT	F	bool
GUIDMODE	catalog	str
USEAOS [1]	F	bool
SPCGRPHS	SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9	str
ILLSPECS [1]	SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9	str
CCDSPECS [1]	SP0,SP1,SP2,SP3,SP4,SP5,SP6,SP7,SP8,SP9	str
TDEWPNT [1]	-18.2	float
TAIRFLOW [1]	1.121	float
TAIRITMP [1]	10.5	float
TAIROTMP [1]	5.5	float
TAIRTEMP [1]	11.86	float
TCASITMP [1]	0.0	float
TCASOTMP [1]	9.6	float
TCSITEMP [1]	7.4	float
TCSOTEMP [1]	10.2	float
TCIBTEMP [1]	0.0	float
TCIMTEMP [1]	0.0	float
TCITTEMP [1]	0.0	float
TCOSTEMP [1]	0.0	float
TCOWTEMP [1]	0.0	float
TDBTEMP [1]	7.4	float
TFLOWIN [1]	7.7	float
TFLOWOUT [1]	8.3	float
TGLYCOLI [1]	-1.8	float
TGLYCOLO [1]	0.0	float
THINGES [1]	12.9	float
THINGEW [1]	11.7	float
TPMAVERT [1]	7.304	float
TPMDESIT [1]	7.0	float
TPMEIBT [1]	7.3	float
TPMEITT [1]	7.3	float
TPMEOBT [1]	7.4	float
TPMEOTT [1]	7.2	float
TPMNIBT [1]	7.4	float
TPMNITT [1]	7.3	float
TPMNOBT [1]	7.7	float
TPMNOTT [1]	7.6	float
TPMRTDT [1]	6.96	float
TPMSIBT [1]	7.4	float
TPMSITT [1]	7.0	float
TPMSOBT [1]	7.4	float
TPMSOTT [1]	7.2	float
TPMSTAT [1]	soft air	str
TPMWIBT [1]	7.2	float
TPMWITT [1]	7.1	float
TPMWOBT [1]	7.6	float
TPMWOTT [1]	8.1	float
TPCITEMP [1]	7.7	float
TPCOTEMP [1]	7.7	float
TPR1HUM [1]	0.0	float
TPR1TEMP [1]	0.0	float
TPR2HUM [1]	0.0	float
TPR2TEMP [1]	0.0	float
TSERVO [1]	7.0	float
TTRSTEMP [1]	13.2	float
TTRWTEMP [1]	13.4	float
TTRUETBT [1]	-4.8	float
TTRUETTT [1]	11.5	float
TTRUNTBT [1]	10.9	float
TTRUNTTT [1]	11.8	float
TTRUSTBT [1]	11.1	float
TTRUSTST [1]	10.8	float
TTRUSTTT [1]	12.4	float
TTRUTSBT [1]	13.6	float
TTRUTSMT [1]	13.7	float
TTRUTSTT [1]	12.5	float
TTRUWTBT [1]	10.9	float
TTRUWTTT [1]	11.6	float
ALARM [1]	F	bool
ALARM-ON [1]	F	bool
BATTERY [1]	100.0	float
SECLEFT [1]	5772.0	float
UPSSTAT [1]	System Normal - On Line(7)	str
INAMPS [1]	64.3	float
OUTWATTS [1]	4500.0,6800.0,4100.0	str
COMPDEW [1]	-12.0	float
COMPHUM [1]	7.8	float
COMPAMB [1]	19.4	float
COMPTEMP [1]	24.9	float
DEWPOINT [1]	5.7	float
HUMIDITY [1]	7.0	float
PRESSURE [1]	794.7	float
OUTTEMP [1]	0.0	float
WINDDIR [1]	82.0	float
WINDSPD [1]	23.3	float
GUST [1]	18.1	float
AMNIENTN [1]	13.3	float
CFLOOR [1]	8.1	float
NWALLIN [1]	13.6	float
NWALLOUT [1]	8.8	float
WWALLIN [1]	12.8	float
WWALLOUT [1]	9.4	float
AMBIENTS [1]	14.6	float
FLOOR [1]	12.3	float
EWALLCMP [1]	10.2	float
EWALLCOU [1]	9.5	float
ROOF [1]	10.0	float
ROOFAMB [1]	9.9	float
DOMEBLOW [1]	12.1	float
DOMEBUP [1]	12.5	float
DOMELLOW [1]	14.4	float
DOMELUP [1]	19.3	float
DOMERLOW [1]	12.3	float
DOMERUP [1]	12.8	float
PLATFORM [1]	15.3	float
SHACKC [1]	15.2	float
SHACKW [1]	13.2	float
STAIRSL [1]	12.6	float
STAIRSM [1]	13.3	float
STAIRSU [1]	13.6	float
TELBASE [1]	8.5	float
UTILWALL [1]	11.6	float
UTILROOM [1]	12.4	float
EXCLUDED		str
ENCODING	ascii	str
CHECKSUM	94VhG2Tf92TfG2Tf	str	HDU checksum updated 2022-01-29T01:14:37
DATASUM	3660988593	str	data unit checksum updated 2022-01-29T01:14:37
SUNDEC [1]	18.640139	float
TCSKRA [1]	0.3 0.003 0.00003	str
SEQSTART [1]	2021-05-14T01:11:54.263801	str
TCSGDEC [1]	0.3	float
MOONSEP [1]	9.334	float
TCSMFDEC [1]	1	int
TCSMFRA [1]	1	int
TCSGRA [1]	0.3	float
SUNRA [1]	51.089577	float
NTSSURVY [1]	na	str
TCSKDEC [1]	0.3 0.003 0.00003	str
TCSPIDEC [1]	1.0,0.0,0.0,0.0	str
TCSPIRA [1]	1.0,0.0,0.0,0.0	str
TRANSPAR [1]	None	Unknown
PMSEEING [1]	None	Unknown
PMTRANSP [1]	None	Unknown
SEEING [1]	None	Unknown
SKYLEVEL [1]	8.153	float

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	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	int16		Bitwise mask from the imaging indicating potential issue or blending
SERSIC	float32		Power-law index for the Sersic profile model (MORPHTYPE=’SER’)
SHAPE_R	float32	arcsec	Half-light radius of galaxy model (>0)
SHAPE_E1	float32		Ellipticity component 1 of galaxy model for galaxy type MORPHTYPE
SHAPE_E2	float32		Ellipticity component 2 of galaxy model for galaxy type MORPHTYPE
REF_ID	int64		Tyc1*1,000,000+Tyc2*10+Tyc3 for Tycho-2; sourceid for Gaia DR2
REF_CAT	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	float32	mag	Gaia G band magnitude
GAIA_PHOT_BP_MEAN_MAG	float32	mag	Gaia BP band magnitude
GAIA_PHOT_RP_MEAN_MAG	float32	mag	Gaia RP band magnitude
PARALLAX	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	int64		Target selection bitmask for secondary programs
PLATE_RA	float64	deg	Barycentric Right Ascension in ICRS to be used by PlateMaker
PLATE_DEC	float64	deg	Barycentric Declination in ICRS to be used by PlateMaker
NUM_ITER	int64		Number of positioner iterations
FIBER_X	float64	mm	CS5 X location requested by PlateMaker
FIBER_Y	float64	mm	CS5 Y location requested by PlateMaker
DELTA_X	float64	mm	CS5 X requested minus actual position
DELTA_Y	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	float64	s	Length of time shutter was open

[1] (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374)

Optional