============================== 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 ====== ========== ======== =================== 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 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============= ============================================================ ======= ==================================================== 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 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 -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 https://github.com/desihub/specter 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 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 ============= ============================================================ ======= ==================================================== 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 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 :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 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================= ==== ============================================== 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 :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 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: 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; ``sourceid`` for Gaia DR2 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 ========================== ======= ============ ======================================================================================================================================= .. [1] Optional