================================ fiberflatnight-CAMERA-NIGHT.fits ================================ :Summary: Relative fiber-to-fiber variations ("fiberflat") as measured by continuum lamp calibration spectra, combined across multiple exposures. Corrected flux = original flux / fiberflat. :Naming Convention: ``fiberflatnight-CAMERA-NIGHT.fits``, where ``CAMERA`` is *e.g.*, "b0", "r5", etc. and ``NIGHT`` is the observation night in YYYYMMDD format. :Regex: ``fiberflatnight-[brz][0-9]-[0-9]{8}\.fits`` :File Type: FITS, 10 MB Contents ======== ====== ========== ======== ================================= Number EXTNAME Type Contents ====== ========== ======== ================================= HDU0_ FIBERFLAT IMAGE Relative fiber-to-fiber variation HDU1_ IVAR IMAGE Inverse variance of fiberflat HDU2_ MASK IMAGE Mask of fiberflat (0=good) HDU3_ MEANSPEC IMAGE Average spectrum HDU4_ WAVELENGTH IMAGE Wavelength HDU5_ FIBERMAP BINTABLE fibermap ====== ========== ======== ================================= 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 from a series of flat field exposures. It is the one used for the science observations during the night. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ============= =========================================================== ======= ==================================================== KEY Example Value Type Comment ============= =========================================================== ======= ==================================================== NAXIS1 2751 int NAXIS2 500 int EXPID 91342 int Exposure number EXPFRAME 0 int Frame number FLAVOR science str Observation type SEQUENCE Spectrographs str OCS Sequence name PURPOSE Main Survey str Purpose of observing night PROGRAM CALIB DESI-CALIB-00 LEDs only str Program name PROPID 2020B-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 20210606 int Observing night TIMESYS UTC str Time system used for date-obs DATE-OBS 2021-06-07T00:37:22.927269888 str [UTC] Observation data and start tim TIME-OBS 2021-06-06T00:37:22.927269888 str [UTC] Observation start time MJD-OBS 59372.02595981 float Modified Julian Date of observation OPENSHUT 2021-06-07T00:37:23.710751 Unknown Time shutter opened ST 10:13:31.760000 str Local Sidereal time at observation start (HH:MM EXPTIME 120.04 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 2021-05-19T22:18:47.035384 str Time when CCD voltage was turned on VCCDSEC 1563696.6 float [s] CCD on time in seconds EQUINOX 2000.0 float Epoch of observation SPECGRPH 0 int Spectrograph logical name (SP) SPECID 4 int Spectrograph serial number (SM) FEEBOX lbnl081 str CCD Controller serial number VESSEL 15 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 850.0 float [deg C] CCD controller CCD temperature RADESYS FK5 str Coordinate reference frame of major/minor axes 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 CLOCK0 3.9999,-4.0002 str [V] high rail, low rail CCDSECD [2049:4096, 2049:4096] str CCD section for quadrant D CLOCK17 3.9999,-4.0002 str [V] high rail, low rail DELAYS 13, 13, 25, 25, 8, 3000, 7, 7, 400, 7 str [10] Delay settings BIASSECD [2117:2180, 2114:4161] str Bias section for quadrant D DATASECD [2181:4228, 2114:4161] str Data section for quadrant D CLOCK14 3.0,-7.0002 str [V] high rail, low rail PRRSECC [5:2052, 4162:4162] str Row prescan section for quadrant C CCDSECC [1:2048, 2049:4096] str CCD section for quadrant C CPUTEMP 56.0097 float [deg C] CCD controller CPU temperature BIASSECA [2053:2116, 2:2049] str Bias section for quadrant A DAC13 -5.0006,-4.9816 str [V] set value, measured value OFFSET5 -1.100000023841858,0.0105 str [V] set value, measured value DAC0 15.9998,15.965 str [V] set value, measured value DAC11 26.9998,26.9049 str [V] set value, measured value OFFSET6 -1.100000023841858,0.0158 str [V] set value, measured value OFFSET2 -1.5,15.8311 str [V] set value, measured value CLOCK15 0.0,0.0 str [V] high rail, low rail TRIMSECB [2181:4228, 2:2049] str Trim section for quadrant B ORSECC [5:2052, 2082:2113] str Row overscan section for quadrant C BIASSECB [2117:2180, 2:2049] str Bias section for quadrant B OFFSET1 -1.5,15.8208 str [V] set value, measured value ORSECA [5:2052, 2050:2081] str Row overscan section for quadrant A CAMERA b0 str Camera name CLOCK1 3.9999,-4.0002 str [V] high rail, low rail DETSECC [1:2048, 2049:4096] str Detector section for quadrant C DAC5 0.0,0.0158 str [V] set value, measured value TRIMSECC [5:2052, 2114:4161] str Trim section for quadrant C DAC7 0.0,0.0105 str [V] set value, measured value DAC3 15.9998,15.965 str [V] set value, measured value ORSECD [2181:4228, 2082:2113] str Row bias section for quadrant D CCDSECB [2049:4096, 1:2048] str CCD section for quadrant B DAC1 15.9998,15.8208 str [V] set value, measured value DAC8 26.9998,26.6081 str [V] set value, measured value CCDSIZE 4162,4232 str CCD size in pixels (rows, columns) CASETEMP 56.3689 float [deg C] CCD controller case temperature PRESECA [1:4, 2:2049] str Prescan section for quadrant A CLOCK3 6.9999,-2.0001 str [V] high rail, low rail SETTINGS detectors_sm_20210128.json str Name of DESI CCD settings file OFFSET3 -1.5,15.965 str [V] set value, measured value OFFSET0 -1.5,15.965 str [V] set value, measured value DETSECD [2049:4096, 2049:4096] str Detector section for quadrant D AMPSECB [2049:4096, 2048:1] str AMP section for quadrant B DATASECA [5:2052, 2:2049] str Data section for quadrant A CLOCK2 3.9999,-4.0002 str [V] high rail, low rail BLDTIME 0.3504 float [s] Time to build image CCDNAME CCDSM4B str CCD name PRRSECA [5:2052, 1:1] str Row prescan section for quadrant A DAC14 0.0,0.8216 str [V] set value, measured value CCDCFG default_sta_20210128.cfg str CCD configuration file PRESECB [4229:4232, 2:2049] str Prescan section for quadrant B CDSPARMS 400, 400, 8, 1000 str CDS parameters CRYOTEMP [1]_ 162.97 float [deg K] Cryostat CCD temperature CLOCK6 3.9999,-4.0002 str [V] high rail, low rail DATASECB [2181:4228, 2:2049] str Data section for quadrant B CLOCK11 0.0,0.0 str [V] high rail, low rail DAC9 26.9998,26.9346 str [V] set value, measured value DAC2 15.9998,15.8208 str [V] set value, measured value DAC6 0.0,0.0158 str [V] set value, measured value DETSECA [1:2048, 1:2048] str Detector section for quadrant A CLOCK13 3.0,-7.0002 str [V] high rail, low rail DATASECC [5:2052, 2114:4161] str Data section for quadrant C CLOCK16 0.0,0.0 str [V] high rail, low rail CLOCK9 3.0,-7.0002 str [V] high rail, low rail TRIMSECA [5:2052, 2:2049] str Trim section for quadrant A DAC15 19.9997,20.0616 str [V] set value, measured value AMPSECD [4096:2049, 4096:2049] str AMP section for quadrant D DAC17 -0.0,0.0366 str [V] set value, measured value DETSECB [2049:4096, 1:2048] str Detector section for quadrant B PRRSECD [2181:4228, 4162:4162] str Row prescan section for quadrant D PRRSECB [2181:4228, 1:1] str Row prescan section for quadrant B CLOCK8 3.0,-7.0002 str [V] high rail, low rail OFFSET4 -1.100000023841858,0.0053 str [V] set value, measured value AMPSECC [2048:1, 2049:4096] str AMP section for quadrant C CCDTMING flatdark_sta_timing.txt str CCD timing file TRIMSECD [2181:4228, 2114:4161] str Trim section for quadrant D CCDPREP purge,clear str CCD prep actions CLOCK18 3.9999,-4.0002 str [V] high rail, low rail PRESECD [4229:4232, 2114:4161] str Prescan section for quadrant D DAC4 0.0,0.0105 str [V] set value, measured value DAC16 0.0,65.6502 str [V] set value, measured value BIASSECC [2053:2116, 2114:4161] str Bias section for quadrant C ORSECB [2181:4228, 2050:2081] str Row overscan section for quadrant B CLOCK10 3.0,-7.0002 str [V] high rail, low rail DETECTOR sn22797 str Detector (ccd) identification CLOCK7 6.9999,-2.0001 str [V] high rail, low rail DAC10 26.9998,26.8456 str [V] set value, measured value CLOCK5 3.9999,-4.0002 str [V] high rail, low rail AMPSECA [1:2048, 1:2048] str AMP section for quadrant A CLOCK12 3.0,-7.0002 str [V] high rail, low rail PRESECC [1:4, 2114:4161] str Prescan section for quadrant C CRYOPRES [1]_ 1.002e-07 str [mb] Cryostat pressure (IP) DAC12 4.9997,22.62 str [V] set value, measured value OFFSET7 -1.100000023841858,0.0105 str [V] set value, measured value CLOCK4 3.9999,-4.0002 str [V] high rail, low rail DIGITIME 54.7987 float [s] Time to digitize image PGAGAIN 5 int Controller gain CCDSECA [1:2048, 1:2048] str CCD section for quadrant A REQTIME 120.0 float [s] Requested exposure time OBSID kp4m20210607t003722 str Unique observation identifier PROCTYPE RAW str Data processing level PRODTYPE image str Data product type CHECKSUM 9aCgFaCZ9aCdCaCZ str HDU checksum updated 2022-02-06T08:13:11 DATASUM 4268167737 str data unit checksum updated 2022-02-06T08:13:11 GAINA 1.133 float e/ADU (gain applied to image) SATULEVA 65535.0 float saturation or non lin. level, in ADU, inc. bias OSTEPA 1.2530904947198 float ADUs (max-min of median overscan per row) OMETHA AVERAGE str use average overscan OVERSCNA 1209.671055084825 float ADUs (gain not applied) OBSRDNA 4.085456675058811 float electrons (gain is applied) SATUELEA 72880.5976945889 float saturation or non lin. level, in electrons GAINB 1.117 float e/ADU (gain applied to image) SATULEVB 65535.0 float saturation or non lin. level, in ADU, inc. bias OSTEPB 1.01353762880899 float ADUs (max-min of median overscan per row) OMETHB AVERAGE str use average overscan OVERSCNB 1198.692841450332 float ADUs (gain not applied) OBSRDNB 2.953525302217383 float electrons (gain is applied) SATUELEB 71863.65509609997 float saturation or non lin. level, in electrons GAINC 1.122 float e/ADU (gain applied to image) SATULEVC 65535.0 float saturation or non lin. level, in ADU, inc. bias OSTEPC 1.285695178230526 float ADUs (max-min of median overscan per row) OMETHC AVERAGE str use average overscan OVERSCNC 1190.789779784249 float ADUs (gain not applied) OBSRDNC 3.539433190358737 float electrons (gain is applied) SATUELEC 72194.20386708208 float saturation or non lin. level, in electrons GAIND 1.122 float e/ADU (gain applied to image) SATULEVD 65535.0 float saturation or non lin. level, in ADU, inc. bias OSTEPD 0.9090212500377675 float ADUs (max-min of median overscan per row) OMETHD AVERAGE str use average overscan OVERSCND 1181.653571158484 float ADUs (gain not applied) OBSRDND 3.286804241230265 float electrons (gain is applied) SATUELED 72204.4546931602 float saturation or non lin. level, in electrons FIBERMIN 0 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 OBSTYPE FLAT str Spectrograph observation type MANIFEST F bool DOS exposure manifest OBJECT str Object name NTSSURVY [1]_ na str NTS survey 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 SEQSTART [1]_ 2021-06-07T00:37:19.875612 str Start time of sequence processing 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]_ 1.521278 float Airmass FOCUS [1]_ 1143.6,-727.1,-829.6,5.1,35.1,-0.0 str Telescope focus settings PMREADY [1]_ T bool Primary mirror ready DOMEAZ [1]_ 106.784 float [deg] Dome azimuth angle DOMINPOS [1]_ T 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) SUNRA [1]_ 75.340488 float [deg] Sun RA at start of exposure SUNDEC [1]_ 22.752292 float [deg] Sun declination at start of exposure MOONDEC [1]_ 11.86839 float [deg] Moon declination at start of exposure MOONRA [1]_ 37.518292 float [deg] Moon RA at start of exposure MOONSEP [1]_ 56.776 float [deg] Moon Separation MOUNTAZ [1]_ 286.506397 float [deg] Mount azimuth angle MOUNTDEC [1]_ 31.963302 float [deg] Mount declination MOUNTEL [1]_ 41.036698 float [deg] Mount elevation angle MOUNTHA [1]_ 58.478595 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]_ 73.493607 float [deg] Parallactic angle SKYDEC [1]_ 31.963302 float [deg] Telescope declination (pointing on sky) SKYRA [1]_ 94.904717 float [deg] Telescope right ascension (pointing on sk TARGTDEC [1]_ 31.963305 float [deg] Target declination (to TCS) TARGTRA [1]_ 88.232751 float [deg] Target right ascension (to TCS) TARGTAZ [1]_ 288.686999 float [deg] Target azimuth TARGTEL [1]_ 35.641227 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]_ 48.963302 float [deg] Telescope zenith distance TCSST [1]_ 10:13:31.995 str Local Sidereal time reported by TCS (HH:MM:SS) TCSMJD [1]_ 59372.026394 float MJD reported by TCS SEEING [1]_ None Unknown [arcsec] ETC/PM seeing TRANSPAR [1]_ None Unknown ETC/PM transparency PMSEEING [1]_ None Unknown [arcsec] PlateMaker GFAPROC seeing PMTRANSP [1]_ None Unknown [%] PlateMaker GFAPROC transparency ADCCORR F bool Correct pointing for ADC setting if True ADC1PHI [1]_ 123.200072 float [deg] ADC 1 angle ADC2PHI [1]_ 151.330141 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]_ 1143.6,-727.1,-829.6,5.1,35.1,-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]_ F 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 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 UPSSTAT [1]_ SUCCESS str UPS Status FILENAME /exposures/desi/20210606/00091342/desi-00091342.fits.fz str Name of (F EXCLUDED str Components excluded from this exposure TCSKRA [1]_ 1.5 0 0 str TCS Kalman (RA) TCSKDEC [1]_ 1.5 0 0 str TCS Kalman (dec) TCSGRA [1]_ 0.3 float TCS simple gain (RA) TCSGDEC [1]_ 0.3 float TCS simple gain (dec) TCSMFRA [1]_ 1 int TCS moving filter length (RA) TCSMFDEC [1]_ 1 int TCS moving filter length (dec) TCSPIRA [1]_ 1.0,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu TCSPIDEC [1]_ 1.0,0.0,0.0,0.0 str TCS PI settings (P, I (gain, error window, satu NSPEC 500 int Number of spectra WAVEMIN 3600.0 float First wavelength [Angstroms] WAVEMAX 5800.0 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/20210606/00091342/psf-b0-00091342.fits str Input sp IN_IMG SPECPROD/preproc/20210606/00091342/preproc-b0-00091342.fits str ORIG_PSF SPECPROD/calibnight/20210606/psfnight-b0-20210606.fits str CHI2PDF 1.102403823484989 float BUNIT str adimensional quantity to divide to flatfield a frame USEAOS [1]_ F bool DOS Control: AOS data available if true SPLITIDS [1]_ 80644 str List of expids for split exposures SHACKC [1]_ 13.9 float [deg C] temperature at shack ceiling TTRUSTTT [1]_ 9.2 float [deg] Telescope truss STT temperature UTILWALL [1]_ 9.0 float [deg C] temperature at utility room wall DOMERLOW [1]_ 9.1 float [deg C] temperature at dome right, lower TPMNIBT [1]_ 4.6 float [deg] Telescope mirror NIB temperature TPMEITT [1]_ 4.7 float [deg] Telescope mirror EIT temperature PLATFORM [1]_ 12.4 float [deg C] temperature at platform THINGEW [1]_ 9.0 float [deg] Telescope hinge W temperature HUMIDITY [1]_ 32.0 float [%] (outside) humidity DOMSHUTU [1]_ not open str Upper dome shutter FLOOR [1]_ 11.1 float [deg C] temperature at floor (LCR) DOMELLOW [1]_ 9.3 float [deg C] temperature at dome left, lower TCSOTEMP [1]_ 7.1 float [deg] Telescope center section out temperature OUTTEMP [1]_ 0.0 float [deg C] outside temperature TGLYCOLO [1]_ -0.8 float [deg] Telescope glycol out temperature TTRUNTTT [1]_ 8.8 float [deg] Telescope truss NTT temperature PMCOOL [1]_ on str Primary mirror cooling TTRUSTBT [1]_ 8.3 float [deg] Telescope truss STB temperature CFLOOR [1]_ 5.8 float [deg C] temperature on C floor TCITTEMP [1]_ 0.0 float [deg] Telescope chimney IT temperature TSERVO [1]_ 4.4 float Telescope servo setpoint WINDDIR [1]_ 298.0 float [deg] wind direction TTRWTEMP [1]_ 9.9 float [deg] Telescope top ring W temperature TPMRTDT [1]_ 4.52 float [deg] Telescope mirror RTD temperature DOMLIGHL [1]_ off str Low dome lights AMBIENTS [1]_ 13.1 float [deg C] ambient temperature south TPMSTAT [1]_ soft air str Telescope mirror status TPMSITT [1]_ 4.5 float [deg] Telescope mirror SIT temperature SHACKW [1]_ 11.6 float [deg C] temperature at shack wall TTRUWTBT [1]_ 8.0 float [deg] Telescope truss WTB temperature NWALLIN [1]_ 12.1 float [deg C] temperature at north wall inside DOMERUP [1]_ 10.3 float [deg C] temperature at dome right, upper TPMWOTT [1]_ 5.4 float [deg] Telescope mirror WOT temperature DOMEBUP [1]_ 14.6 float [deg C] temperature at dome back, upper TPMDESIT [1]_ 4.4 float [deg] Telescope mirror desired temperature TPCOTEMP [1]_ 4.7 float [deg] Telescope primary cell out temperature TTRUTSTT [1]_ 9.8 float [deg] Telescope truss TST temperature TPMWIBT [1]_ 4.5 float [deg] Telescope mirror WIB temperature TPMEOBT [1]_ 4.5 float [deg] Telescope mirror EOB temperature OUTWATTS [1]_ 4600.0,6900.0,4200.0 str [W] UPS Phase A, B, C output watts COMPDEW [1]_ -7.2 float [deg C] Computer room dewpoint ROOF [1]_ 7.3 float [deg C] temperature on roof AMNIENTN [1]_ 11.6 float [deg C] ambient temperature north TAIRTEMP [1]_ 8.712 float [deg] Telescope air temperature COMPAMB [1]_ 17.2 float [deg C] Computer room ambient temperature TPR1HUM [1]_ 0.0 float Telescope probe 1 humidity TRUSTEMP [1]_ 10.133 float [deg] Average Telescope truss temperature (only WINDSPD [1]_ 6.0 float [m/s] wind speed PMCOVER [1]_ open str Primary mirror cover TDEWPNT [1]_ -8.51 float Telescope air dew point TELBASE [1]_ 6.2 float [deg C] temperature at telescope base TPMWITT [1]_ 4.7 float [deg] Telescope mirror WIT temperature COMPHUM [1]_ 13.3 float [%] Computer room humidity TTRUTSMT [1]_ 10.4 float [deg] Telescope truss TSM temperature NWALLOUT [1]_ 6.3 float [deg C] temperature at north wall outside TAIRITMP [1]_ 7.9 float [deg] Telescope air in temperature TPMNOBT [1]_ 4.8 float [deg] Telescope mirror NOB temperature TPCITEMP [1]_ 4.7 float [deg] Telescope primary cell in temperature TTRUNTBT [1]_ 8.1 float [deg] Telescope truss NTB temperature TFLOWIN [1]_ 9.8 float Telescope flow rate in EWALLCMP [1]_ 7.8 float [deg C] temperature at east wall, computer room TDBTEMP [1]_ 5.1 float [deg] Telescope dec bore temperature TCASITMP [1]_ 0.0 float [deg] Telescope Cass Cage in temperature TCSITEMP [1]_ 4.7 float [deg] Telescope center section in temperature STAIRSU [1]_ 10.1 float [deg C] temperature at stairs, upper TPMNITT [1]_ 4.8 float [deg] Telescope mirror NIT temperature TPMSOBT [1]_ 4.6 float [deg] Telescope mirror SOB temperature TCOWTEMP [1]_ 0.0 float [deg] Telescope chimney OW temperature TTRUWTTT [1]_ 8.8 float [deg] Telescope truss WTT temperature STAIRSL [1]_ 9.2 float [deg C] temperature at stairs, lower WWALLOUT [1]_ 6.9 float [deg C] temperature at west wall outside INAMPS [1]_ 66.0 float [A] UPS total input current DEWPOINT [1]_ 20.1 float [deg C] (outside) dewpoint PMIRTEMP [1]_ 4.787 float [deg] Average primary mirror temperature (nit,e TPR1TEMP [1]_ 0.0 float [deg] Telescope probe1 temperature UTILROOM [1]_ 9.4 float [deg C] temperature in utilitiy room TAIRFLOW [1]_ 1.121 float Telescope air flow WWALLIN [1]_ 11.2 float [deg C] temperature at west wall inside EWALLCOU [1]_ 7.0 float [deg C] temperature at east wall, Coude room BATTERY [1]_ 100.0 float [%] UPS Battery left TGLYCOLI [1]_ -2.2 float [deg] Telescope glycol in temperature PRESSURE [1]_ 795.0 float [torr] (outside) air pressure DOMSHUTL [1]_ not open str Lower dome shutter TCIBTEMP [1]_ 0.0 float [deg] Telescope chimney IB temperature ROOFAMB [1]_ 7.3 float [deg C] ambient temperature on roof SECLEFT [1]_ 5604.0 float [s] UPS Seconds left DOMELUP [1]_ 12.8 float [deg C] temperature at dome left, upper STAIRSM [1]_ 9.7 float [deg C] temperature at stairs, mid TFLOWOUT [1]_ 10.0 float Telescope flow rate out TTRUETTT [1]_ 8.8 float [deg] Telescope truss ETT temperature DOMLIGHH [1]_ off str High dome lights TPR2HUM [1]_ 0.0 float Telescope probe 2 humidity TPMEOTT [1]_ 4.7 float [deg] Telescope mirror EOT temperature ALARM-ON [1]_ F bool UPS active alarm condition TCOSTEMP [1]_ 0.0 float [deg] Telescope chimney OS temperature THINGES [1]_ 9.7 float [deg] Telescope hinge S temperature TTRSTEMP [1]_ 9.8 float [deg] Telescope top ring S temperature TTRUSTST [1]_ 10.8 float [deg] Telescope truss STS temperature TTRUTSBT [1]_ 10.2 float [deg] Telescope truss TSB temperature TPMSIBT [1]_ 4.5 float [deg] Telescope mirror SIB temperature TTRUETBT [1]_ -7.9 float [deg] Telescope truss ETB temperature TAIROTMP [1]_ 3.7 float [deg] Telescope air out temperature TPMNOTT [1]_ 4.9 float [deg] Telescope mirror NOT temperature COMPTEMP [1]_ 22.3 float [deg C] Computer room hygrometer temperature ALARM [1]_ F bool UPS major alarm or check battery TCIMTEMP [1]_ 0.0 float [deg] Telescope chimney IM temperature TPMWOBT [1]_ 4.8 float [deg] Telescope mirror WOB temperature TPMEIBT [1]_ 4.6 float [deg] Telescope mirror EIB temperature TPMSOTT [1]_ 4.6 float [deg] Telescope mirror SOT temperature TCASOTMP [1]_ 6.8 float [deg] Telescope Cass Cage out temperature GUST [1]_ 4.5 float [m/s] Wind gusts speed TPR2TEMP [1]_ 0.0 float [deg] Telescope probe2 temperature TPMAVERT [1]_ 4.781 float [deg] Telescope mirror averagetemperature DOMEBLOW [1]_ 11.8 float [deg C] temperature at dome back, lower SKYLEVEL [1]_ 8.153 float [counts?] ETC sky level ============= =========================================================== ======= ==================================================== Data: FITS image [float32, 2751x500] HDU1 ---- EXTNAME = IVAR Inverse variance (1/sigma^2) of the fiber flat field in HDU0. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2751 int NAXIS2 500 int BUNIT str inverse variance, adimensional CHECKSUM 75OIA2LF92LFA2LF str HDU checksum updated 2021-07-07T19:21:58 DATASUM 2784291411 str data unit checksum updated 2021-07-07T19:21:58 ======== ================ ==== ============================================== Data: FITS image [float32, 2751x500] HDU2 ---- EXTNAME = MASK Mask of the fiberflat; 0=good. See the :doc:`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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2751 int Number of wavelengths NAXIS2 500 int Number of spectra (number of rows) BSCALE 1 int BZERO 2147483648 int CHECKSUM TDeFWDbFTDbFTDbF str HDU checksum updated 2021-07-07T19:21:58 DATASUM 687822 str data unit checksum updated 2021-07-07T19:21:58 ======== ================ ==== ============================================== 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ======== ================= ==== ============================================== KEY Example Value Type Comment ======== ================= ==== ============================================== NAXIS1 2751 int Number of wavelengths BUNIT electron/Angstrom str CHECKSUM nXJGnXGFnXGFnXGF str HDU checksum updated 2021-07-07T19:21:58 DATASUM 2097385325 str data unit checksum updated 2021-07-07T19:21:58 ======== ================= ==== ============================================== 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 :ref:`WAVELENGTH documentation ` for more details. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 2751 int Number of wavelengths BUNIT Angstrom str CHECKSUM 4nG56kG34kG34kG3 str HDU checksum updated 2021-07-07T19:21:58 DATASUM 2458411755 str data unit checksum updated 2021-07-07T19:21:58 ======== ================ ==== ============================================== Data: FITS image [float32, 2751] HDU5 ---- EXTNAME = FIBERMAP Fibermap with information about the fiber status. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 373 int length of dimension 1 NAXIS2 500 int length of dimension 2 ENCODING ascii str CHECKSUM 2imG4ZkE2fkE2ZkE str HDU checksum updated 2021-07-07T19:21:58 DATASUM 508954227 str data unit checksum updated 2021-07-07T19:21:58 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ===================== ======= ===== =========== Name Type Units Description ===================== ======= ===== =========== TARGETID int64 PETAL_LOC int16 DEVICE_LOC int32 FIBER int32 LOCATION int64 FIBERSTATUS int32 TARGET_RA float64 TARGET_DEC float64 PMRA float32 PMDEC float32 REF_EPOCH float32 LAMBDA_REF float32 FA_TARGET int64 FA_TYPE binary OBJTYPE char[3] FIBERASSIGN_X float32 FIBERASSIGN_Y float32 PRIORITY int32 SUBPRIORITY float64 OBSCONDITIONS int32 RELEASE int16 BRICKNAME char[8] BRICKID int64 BRICK_OBJID int64 MORPHTYPE char[4] EBV float32 FLUX_G float32 FLUX_R float32 FLUX_Z float32 FLUX_W1 float32 FLUX_W2 float32 FLUX_IVAR_G float32 FLUX_IVAR_R float32 FLUX_IVAR_Z float32 FLUX_IVAR_W1 float32 FLUX_IVAR_W2 float32 FIBERFLUX_G float32 FIBERFLUX_R float32 FIBERFLUX_Z float32 FIBERTOTFLUX_G float32 FIBERTOTFLUX_R float32 FIBERTOTFLUX_Z float32 MASKBITS int16 SERSIC float32 SHAPE_R float32 SHAPE_E1 float32 SHAPE_E2 float32 REF_ID int64 REF_CAT char[2] GAIA_PHOT_G_MEAN_MAG float32 GAIA_PHOT_BP_MEAN_MAG float32 GAIA_PHOT_RP_MEAN_MAG float32 PARALLAX float32 PHOTSYS char[1] PRIORITY_INIT int64 NUMOBS_INIT int64 DESI_TARGET int64 BGS_TARGET int64 MWS_TARGET int64 SCND_TARGET int64 PLATE_RA float64 PLATE_DEC float64 NUM_ITER int64 FIBER_X float64 FIBER_Y float64 DELTA_X float64 DELTA_Y float64 FIBER_RA float64 FIBER_DEC float64 EXPTIME float64 ===================== ======= ===== =========== .. [1] Optional Notes and Examples ================== Corrected flux = original flux / fiberflat. .. code:: fiberflat = desispec.fiberflat.compute_fiberflat(flatframe) desispec.fiberflat.apply_fiberflat(scienceframe, fiberflat)