========= rvpix_exp ========= :Summary: RVSpecfit measurements from individual exposures in different surveys, programs. :Naming Convention: ``rvpix_exp-{SURVEY}-{PROGRAM}.fits``, where survey is sv1, sv2.. program is dark, bright, ... :File Type: FITS, 5 GB *This section gives the type of the file and its approximate size.* Contents ======== ====== ======== ======== ==================================================== Number EXTNAME Type Contents ====== ======== ======== ==================================================== HDU0_ IMAGE Empty HDU HDU1_ RVTAB BINTABLE RVSpecfit results HDU2_ FIBERMAP BINTABLE Information about objects inherited from targeting HDU3_ SCORES BINTABLE Information about spectra quality HDU4_ GAIA BINTABLE Gaia crossmatch ====== ======== ======== ==================================================== FITS Header Units ================= HDU0 ---- *Summarize the contents of this HDU.* This HDU has no non-standard required keywords. Empty HDU. HDU1 ---- EXTNAME = RVTAB This is table of measurements by RVSpecfit of individual exposures in DESI for a given survey/program. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 265 int length of dimension 1 NAXIS2 3572976 int length of dimension 2 CHECKSUM BahGCUf9BafEBUf9 str HDU checksum updated 2024-12-19T17:16:48 DATASUM 1913037089 str data unit checksum updated 2024-12-19T17:16:48 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns =========== ======= ====== ======================================================================================================================================= Name Type Units Description =========== ======= ====== ======================================================================================================================================= VRAD float64 km s-1 Radial velocity VRAD_ERR float64 km s-1 Radial velocity error VRAD_SKEW float64 Radial velocity posterior skewness VRAD_KURT float64 Radial velocity posterior kurtosis LOGG float64 Log of surface gravity TEFF float64 K Effective temperature ALPHAFE float64 [alpha/Fe] from template fitting FEH float64 [Fe/H] from template fitting LOGG_ERR float64 Log of surface gravity uncertainty TEFF_ERR float64 K Effective temperature uncertainty ALPHAFE_ERR float64 [alpha/Fe] uncertainty from template fitting FEH_ERR float64 [Fe/H] uncertainty from template fitting VSINI float64 km s-1 Stellar rotation velocity CHISQ_TOT float64 Total chi-square for all arms CHISQ_C_TOT float64 Total chi-square for all arms for polynomial only fit CHISQ_B float64 Chi-square in the B arm CHISQ_C_B float64 Chi-square in the B arm after fitting continuum only CHISQ_R float64 Chi-square in the R arm CHISQ_C_R float64 Chi-square in the R arm after fitting continuum only CHISQ_Z float64 Chi-square in the Z arm CHISQ_C_Z float64 Chi-square in the Z arm after fitting continuum only RVS_WARN int64 RVSpecFit warning flag FIBER int32 Fiber ID on the CCDs [0-4999] 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 TARGET_RA float64 deg Barycentric right ascension in ICRS TARGET_DEC float64 deg Barycentric declination in ICRS TARGETID int64 Unique DESI target ID EXPID int32 DESI Exposure ID number SN_B float64 Median S/N in the B arm SN_R float64 Median S/N in the R arm SN_Z float64 Median S/N in the Z arm SUCCESS logical Did we succeed or fail RR_Z float64 Redrock redshift RR_SPECTYPE char[6] Redrock spectype HEALPIX int64 HEALPixel containing this location at NSIDE=64 in the NESTED scheme =========== ======= ====== ======================================================================================================================================= HDU2 ---- EXTNAME = FIBERMAP FIBERMAP table with information on individual targets copied from original spectra- file. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 389 int length of dimension 1 NAXIS2 3572976 int length of dimension 2 CHECKSUM 2CZO39WL2AWL29WL str HDU checksum updated 2024-12-19T17:17:17 DATASUM 495390822 str data unit checksum updated 2024-12-19T17:17:17 ======== ================ ==== ============================================== 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 char[8] Brick name from tractor input BRICKID int32 Brick ID from tractor input BRICK_OBJID int32 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 PSF_TO_FIBER_SPECFLUX float64 fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing NIGHT int32 Night of observation (YYYYMMDD) starting at local noon before observations start EXPID int32 DESI Exposure ID number MJD float64 d Modified Julian Date when shutter was opened for this exposure TILEID int32 Unique DESI tile ID ===================== ======= ============ ======================================================================================================================================= HDU3 ---- EXTNAME = SCORES The table with various quality information about spectra. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 488 int length of dimension 1 NAXIS2 3572976 int length of dimension 2 CHECKSUM 9fTEHdQE9dQEEdQE str HDU checksum updated 2024-12-19T17:17:33 DATASUM 4196603941 str data unit checksum updated 2024-12-19T17:17:33 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ===================== ======= ===== ============================================================ Name Type Units Description ===================== ======= ===== ============================================================ TARGETID int64 Unique DESI target ID SUM_RAW_COUNT_B float64 Sum of raw counts in B camera MEDIAN_RAW_COUNT_B float64 Median of raw counts in B camera MEDIAN_RAW_SNR_B float64 Median(raw signal/noise) in B camera SUM_FFLAT_COUNT_B float64 Sum of fiber-flatfielded counts B camera MEDIAN_FFLAT_COUNT_B float64 Median of fiber-flatfielded counts in B camera MEDIAN_FFLAT_SNR_B float64 Median(S/N) of fiberflatfielded counts in B camera SUM_SKYSUB_COUNT_B float64 Sum of sky-subtracted counts in B camera MEDIAN_SKYSUB_COUNT_B float64 Median of sky-subtracted counts in B camera MEDIAN_SKYSUB_SNR_B float64 Median(S/N) of sky-subtracted counts in B camera SUM_CALIB_COUNT_B float64 Sum of calibrated flux in B camera MEDIAN_CALIB_COUNT_B float64 Median of calibrated flux in B camera MEDIAN_CALIB_SNR_B float64 Median(S/N) of calibrated flux in B camera TSNR2_GPBDARK_B float64 template (S/N)^2 for dark targets in guider pass band on B TSNR2_ELG_B float64 ELG B template (S/N)^2 TSNR2_GPBBRIGHT_B float64 template (S/N)^2 for bright targets in guider pass band on B TSNR2_LYA_B float64 LYA B template (S/N)^2 TSNR2_BGS_B float64 BGS B template (S/N)^2 TSNR2_GPBBACKUP_B float64 template (S/N)^2 for backup targets in guider pass band on B TSNR2_QSO_B float64 QSO B template (S/N)^2 TSNR2_LRG_B float64 LRG B template (S/N)^2 SUM_RAW_COUNT_R float64 Sum of raw counts in R camera MEDIAN_RAW_COUNT_R float64 Median of raw counts in R camera MEDIAN_RAW_SNR_R float64 Median(raw signal/noise) in R camera SUM_FFLAT_COUNT_R float64 Sum of fiber-flatfielded counts R camera MEDIAN_FFLAT_COUNT_R float64 Median of fiber-flatfielded counts in R camera MEDIAN_FFLAT_SNR_R float64 Median(S/N) of fiberflatfielded counts in R camera SUM_SKYSUB_COUNT_R float64 Sum of sky-subtracted counts in R camera MEDIAN_SKYSUB_COUNT_R float64 Median of sky-subtracted counts in R camera MEDIAN_SKYSUB_SNR_R float64 Median(S/N) of sky-subtracted counts in R camera SUM_CALIB_COUNT_R float64 Sum of calibrated flux in R camera MEDIAN_CALIB_COUNT_R float64 Median of calibrated flux in R camera MEDIAN_CALIB_SNR_R float64 Median(S/N) of calibrated flux in R camera TSNR2_GPBDARK_R float64 template (S/N)^2 for dark targets in guider pass band on R TSNR2_ELG_R float64 ELG R template (S/N)^2 TSNR2_GPBBRIGHT_R float64 template (S/N)^2 for bright targets in guider pass band on R TSNR2_LYA_R float64 LYA R template (S/N)^2 TSNR2_BGS_R float64 BGS R template (S/N)^2 TSNR2_GPBBACKUP_R float64 template (S/N)^2 for backup targets in guider pass band on R TSNR2_QSO_R float64 QSO R template (S/N)^2 TSNR2_LRG_R float64 LRG R template (S/N)^2 SUM_RAW_COUNT_Z float64 Sum of raw counts in Z camera MEDIAN_RAW_COUNT_Z float64 Median of raw counts in Z camera MEDIAN_RAW_SNR_Z float64 Median(raw signal/noise) in Z camera SUM_FFLAT_COUNT_Z float64 Sum of fiber-flatfielded counts Z camera MEDIAN_FFLAT_COUNT_Z float64 Median of fiber-flatfielded counts in Z camera MEDIAN_FFLAT_SNR_Z float64 Median(S/N) of fiberflatfielded counts in Z camera SUM_SKYSUB_COUNT_Z float64 Sum of sky-subtracted counts in Z camera MEDIAN_SKYSUB_COUNT_Z float64 Median of sky-subtracted counts in Z camera MEDIAN_SKYSUB_SNR_Z float64 Median(S/N) of sky-subtracted counts in Z camera SUM_CALIB_COUNT_Z float64 Sum of calibrated flux in Z camera MEDIAN_CALIB_COUNT_Z float64 Median of calibrated flux in Z camera MEDIAN_CALIB_SNR_Z float64 Median(S/N) of calibrated flux in Z camera TSNR2_GPBDARK_Z float64 template (S/N)^2 for dark targets in guider pass band on Z TSNR2_ELG_Z float64 ELG Z template (S/N)^2 TSNR2_GPBBRIGHT_Z float64 template (S/N)^2 for bright targets in guider pass band on Z TSNR2_LYA_Z float64 LYA Z template (S/N)^2 TSNR2_BGS_Z float64 BGS Z template (S/N)^2 TSNR2_GPBBACKUP_Z float64 template (S/N)^2 for backup targets in guider pass band on Z TSNR2_QSO_Z float64 QSO Z template (S/N)^2 TSNR2_LRG_Z float64 LRG Z template (S/N)^2 ===================== ======= ===== ============================================================ HDU4 ---- EXTNAME = GAIA The Gaia DR3 measurements for each object in the catalog. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 438 int length of dimension 1 NAXIS2 3572976 int length of dimension 2 CHECKSUM EB5AH929EA2AE927 str HDU checksum updated 2024-12-19T17:18:07 DATASUM 3494719464 str data unit checksum updated 2024-12-19T17:18:07 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns =============================== ======= ========= ==================================================================== Name Type Units Description =============================== ======= ========= ==================================================================== SOURCE_ID int64 RANDOM_INDEX int64 REF_EPOCH float64 yr Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia RA float64 deg Barycentric Right Ascension in ICRS RA_ERROR float32 DEC float64 deg Barycentric declination in ICRS DEC_ERROR float32 PARALLAX float64 mas Reference catalog parallax PARALLAX_ERROR float32 PARALLAX_OVER_ERROR float32 PMRA float64 mas yr^-1 proper motion in the +RA direction (already including cos(dec)) PMRA_ERROR float32 PMDEC float64 mas yr^-1 Proper motion in the +Dec direction PMDEC_ERROR float32 RA_DEC_CORR float32 RA_PARALLAX_CORR float32 RA_PMRA_CORR float32 RA_PMDEC_CORR float32 DEC_PARALLAX_CORR float32 DEC_PMRA_CORR float32 DEC_PMDEC_CORR float32 PARALLAX_PMRA_CORR float32 PARALLAX_PMDEC_CORR float32 PMRA_PMDEC_CORR float32 ASTROMETRIC_N_OBS_AL int16 ASTROMETRIC_N_OBS_AC int16 ASTROMETRIC_N_GOOD_OBS_AL int16 ASTROMETRIC_N_BAD_OBS_AL int16 ASTROMETRIC_GOF_AL float32 ASTROMETRIC_CHI2_AL float32 ASTROMETRIC_EXCESS_NOISE float32 ASTROMETRIC_EXCESS_NOISE_SIG float32 ASTROMETRIC_PARAMS_SOLVED int16 ASTROMETRIC_PRIMARY_FLAG logical NU_EFF_USED_IN_ASTROMETRY float32 PSEUDOCOLOUR float32 PSEUDOCOLOUR_ERROR float32 RA_PSEUDOCOLOUR_CORR float32 DEC_PSEUDOCOLOUR_CORR float32 PARALLAX_PSEUDOCOLOUR_CORR float32 PMRA_PSEUDOCOLOUR_CORR float32 PMDEC_PSEUDOCOLOUR_CORR float32 ASTROMETRIC_MATCHED_TRANSITS int16 VISIBILITY_PERIODS_USED int16 ASTROMETRIC_SIGMA5D_MAX float32 MATCHED_TRANSITS int16 NEW_MATCHED_TRANSITS int16 MATCHED_TRANSITS_REMOVED int16 IPD_GOF_HARMONIC_AMPLITUDE float32 IPD_GOF_HARMONIC_PHASE float32 IPD_FRAC_MULTI_PEAK int16 IPD_FRAC_ODD_WIN int16 RUWE float32 DUPLICATED_SOURCE logical PHOT_G_N_OBS int16 PHOT_G_MEAN_FLUX float64 PHOT_G_MEAN_FLUX_ERROR float32 PHOT_G_MEAN_FLUX_OVER_ERROR float32 PHOT_G_MEAN_MAG float32 PHOT_BP_N_OBS int16 PHOT_BP_MEAN_FLUX float64 PHOT_BP_MEAN_FLUX_ERROR float32 PHOT_BP_MEAN_FLUX_OVER_ERROR float32 PHOT_BP_MEAN_MAG float32 PHOT_RP_N_OBS int16 PHOT_RP_MEAN_FLUX float64 PHOT_RP_MEAN_FLUX_ERROR float32 PHOT_RP_MEAN_FLUX_OVER_ERROR float32 PHOT_RP_MEAN_MAG float32 PHOT_BP_RP_EXCESS_FACTOR float32 PHOT_BP_N_CONTAMINATED_TRANSITS int16 PHOT_BP_N_BLENDED_TRANSITS int16 PHOT_RP_N_CONTAMINATED_TRANSITS int16 PHOT_RP_N_BLENDED_TRANSITS int16 PHOT_PROC_MODE int16 BP_RP float32 BP_G float32 G_RP float32 RADIAL_VELOCITY float32 RADIAL_VELOCITY_ERROR float32 RV_METHOD_USED int16 RV_NB_TRANSITS int16 RV_NB_DEBLENDED_TRANSITS int16 RV_VISIBILITY_PERIODS_USED int16 RV_EXPECTED_SIG_TO_NOISE float32 RV_RENORMALISED_GOF float32 RV_CHISQ_PVALUE float32 RV_TIME_DURATION float32 RV_AMPLITUDE_ROBUST float32 RV_TEMPLATE_TEFF float32 RV_TEMPLATE_LOGG float32 RV_TEMPLATE_FE_H float32 RV_ATM_PARAM_ORIGIN int16 VBROAD float32 VBROAD_ERROR float32 VBROAD_NB_TRANSITS int16 GRVS_MAG float32 GRVS_MAG_ERROR float32 GRVS_MAG_NB_TRANSITS int16 RVS_SPEC_SIG_TO_NOISE float32 ECL_LON float64 ECL_LAT float64 IN_QSO_CANDIDATES logical IN_GALAXY_CANDIDATES logical NON_SINGLE_STAR int16 HAS_XP_CONTINUOUS logical HAS_XP_SAMPLED logical HAS_RVS logical HAS_EPOCH_PHOTOMETRY logical HAS_EPOCH_RV logical IN_ANDROMEDA_SURVEY logical CLASSPROB_DSC_COMBMOD_QUASAR float32 CLASSPROB_DSC_COMBMOD_GALAXY float32 CLASSPROB_DSC_COMBMOD_STAR float32 TEFF_GSPPHOT float32 LOGG_GSPPHOT float32 MH_GSPPHOT float32 EBV float32 mag Galactic extinction E(B-V) reddening from SFD98 =============================== ======= ========= ==================================================================== Notes and Examples ================== *Add notes and examples here. You can also create links to example files.*