biasnight-CAMERA-NIGHT.fits

Summary:

Master bias frame for the preprocessing of the night data

Naming Convention:

biasnight-CAMERA-NIGHT.fits.gz, where CAMERA is e.g., “b0”, “r5”, etc. and NIGHT is the observation night in YYYYMMDD format.

Regex:

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

File Type:

FITS, 20 MB

Contents

Number	EXTNAME	Type	Contents
HDU0	BIAS	IMAGE	bias image

FITS Header Units

HDU0

EXTNAME = BIAS

2D image with the master bias to subtract to the raw images of the night.

Required Header Keywords

Required Header Keywords table

KEY	Example Value	Type	Comment
NAXIS1	4256	int
NAXIS2	4194	int
TELESCOP	KPNO 4.0-m telescope	str	Telescope name
INSTRUME	DESI	str	Instrument name
SPECGRPH	8	int	Spectrograph logical name (SP)
SPECID	2	int	Spectrograph serial number (SM)
DETECTOR	M1-42	str	Detector (ccd) identification
CAMERA	z8	str	Camera name
CCDNAME	CCDSM2Z	str	CCD name
CCDPREP	purge,clear	str	CCD prep actions
CCDSIZE	4194,4256	str	CCD size in pixels (rows, columns)
CCDTEMP	-136.0659	float	[deg C] CCD controller CCD temperature
CPUTEMP	57.3633	float	[deg C] CCD controller CPU temperature
CASETEMP	57.3533	float	[deg C] CCD controller case temperature
CCDTMING	flatdark_lbnl_timing.txt	str	CCD timing file
CCDCFG	default_lbnl_20210128.cfg	str	CCD configuration file
SETTINGS	detectors_sm_20210128.json	str	Name of DESI CCD settings file
VESSEL	9	int	Cryostat serial number
FEEVER	v20160312	str	CCD Controller version
FEEBOX	lbnl055	str	CCD Controller serial number
PRESECA	[1:7, 2:2065]	str	Prescan section for quadrant A
PRRSECA	[8:2064, 1:1]	str	Row prescan section for quadrant A
DATASECA	[8:2064, 2:2065]	str	Data section for quadrant A
TRIMSECA	[8:2064, 2:2065]	str	Trim section for quadrant A
BIASSECA	[2065:2128, 2:2065]	str	Bias section for quadrant A
ORSECA	[8:2064, 2066:2097]	str	Row overscan section for quadrant A
CCDSECA	[1:2057, 1:2064]	str	CCD section for quadrant A
DETSECA	[1:2057, 1:2064]	str	Detector section for quadrant A
AMPSECA	[1:2057, 1:2064]	str	AMP section for quadrant A
PRESECB	[4250:4256, 2:2065]	str	Prescan section for quadrant B
PRRSECB	[2193:4249, 1:1]	str	Row prescan section for quadrant B
DATASECB	[2193:4249, 2:2065]	str	Data section for quadrant B
TRIMSECB	[2193:4249, 2:2065]	str	Trim section for quadrant B
BIASSECB	[2129:2192, 2:2065]	str	Bias section for quadrant B
ORSECB	[2193:4249, 2066:2097]	str	Row overscan section for quadrant B
CCDSECB	[2058:4114, 1:2064]	str	CCD section for quadrant B
DETSECB	[2058:4114, 1:2064]	str	Detector section for quadrant B
AMPSECB	[4114:2058, 1:2064]	str	AMP section for quadrant B
PRESECC	[1:7, 2130:4193]	str	Prescan section for quadrant C
PRRSECC	[8:2064, 4194:4194]	str	Row prescan section for quadrant C
DATASECC	[8:2064, 2130:4193]	str	Data section for quadrant C
TRIMSECC	[8:2064, 2130:4193]	str	Trim section for quadrant C
BIASSECC	[2065:2128, 2130:4193]	str	Bias section for quadrant C
ORSECC	[8:2064, 2098:2129]	str	Row overscan section for quadrant C
CCDSECC	[1:2057, 2065:4128]	str	CCD section for quadrant C
DETSECC	[1:2057, 2065:4128]	str	Detector section for quadrant C
AMPSECC	[1:2057, 4128:2065]	str	AMP section for quadrant C
PRESECD	[4250:4256, 2130:4193]	str	Prescan section for quadrant D
PRRSECD	[2193:4249, 4194:4194]	str	Row prescan section for quadrant D
DATASECD	[2193:4249, 2130:4193]	str	Data section for quadrant D
TRIMSECD	[2193:4249, 2130:4193]	str	Trim section for quadrant D
BIASSECD	[2129:2192, 2130:4193]	str	Bias section for quadrant D
ORSECD	[2193:4249, 2098:2129]	str	Row bias section for quadrant D
CCDSECD	[2058:4114, 2065:4128]	str	CCD section for quadrant D
DETSECD	[2058:4114, 2065:4128]	str	Detector section for quadrant D
AMPSECD	[4114:2058, 4128:2065]	str	AMP section for quadrant D
DAC0	-9.0002,-9.0331	str	[V] set value, measured value
DAC1	-9.0002,-8.9816	str	[V] set value, measured value
DAC2	-9.0002,-8.961	str	[V] set value, measured value
DAC3	-9.0002,-8.9816	str	[V] set value, measured value
DAC4	5.9998,6.0437	str	[V] set value, measured value
DAC5	5.9998,6.0595	str	[V] set value, measured value
DAC6	5.9998,5.9964	str	[V] set value, measured value
DAC7	5.9998,6.0069	str	[V] set value, measured value
DAC8	-25.0003,-25.0796	str	[V] set value, measured value
DAC9	-25.0003,-25.3467	str	[V] set value, measured value
DAC10	-25.0003,-25.0648	str	[V] set value, measured value
DAC11	-25.0003,-25.3467	str	[V] set value, measured value
DAC12	0.0,-0.0148	str	[V] set value, measured value
DAC13	0.0,-0.0297	str	[V] set value, measured value
DAC14	0.0,-0.0297	str	[V] set value, measured value
DAC15	0.0,-0.0148	str	[V] set value, measured value
DAC16	39.9961,39.4548	str	[V] set value, measured value
DAC17	20.0008,12.2854	str	[V] set value, measured value
CLOCK0	9.9999,0.0	str	[V] high rail, low rail
CLOCK1	9.9999,0.0	str	[V] high rail, low rail
CLOCK2	9.9999,0.0	str	[V] high rail, low rail
CLOCK3	-2.0001,3.9999	str	[V] high rail, low rail
CLOCK4	9.9999,0.0	str	[V] high rail, low rail
CLOCK5	9.9999,0.0	str	[V] high rail, low rail
CLOCK6	9.9999,0.0	str	[V] high rail, low rail
CLOCK7	-2.0001,3.9999	str	[V] high rail, low rail
CLOCK8	9.9992,2.9993	str	[V] high rail, low rail
CLOCK9	9.9992,2.9993	str	[V] high rail, low rail
CLOCK10	9.9992,2.9993	str	[V] high rail, low rail
CLOCK11	9.9992,2.9993	str	[V] high rail, low rail
CLOCK12	9.9992,2.9993	str	[V] high rail, low rail
CLOCK13	9.9992,2.9993	str	[V] high rail, low rail
CLOCK14	9.9992,2.9993	str	[V] high rail, low rail
CLOCK15	9.9992,2.9993	str	[V] high rail, low rail
CLOCK16	9.9999,3.0	str	[V] high rail, low rail
CLOCK17	9.0,0.9999	str	[V] high rail, low rail
CLOCK18	9.0,0.9999	str	[V] high rail, low rail
OFFSET0	0.4000000059604645,-9.0434	str	[V] set value, measured value
OFFSET1	0.4000000059604645,-8.9816	str	[V] set value, measured value
OFFSET2	0.4000000059604645,-8.961	str	[V] set value, measured value
OFFSET3	0.4000000059604645,-8.9713	str	[V] set value, measured value
OFFSET4	2.0,6.0385	str	[V] set value, measured value
OFFSET5	2.0,6.0648	str	[V] set value, measured value
OFFSET6	2.0,6.0017	str	[V] set value, measured value
OFFSET7	2.0,6.0017	str	[V] set value, measured value
DELAYS	20, 20, 25, 40, 7, 3000, 7, 7, 400, 7	str	[10] Delay settings
CDSPARMS	400, 400, 8, 2000	str	CDS parameters
PGAGAIN	3	int	Controller gain
OCSVER	1.2	float	OCS software version
DOSVER	trunk	str	DOS software version
CONSTVER	DESI:CURRENT	str	Constants version
BUNIT	adu	str
NIGHT	20210407	int

Data: FITS image [float32, 4256x4194]