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mwsall

Summary:Combined catalog of DESI measurements from RVSpecfit and FERRE crossmatched with Gaia
File Type:FITS, 1 GB

Contents

Number EXTNAME Type Contents
HDU0   IMAGE Empty HDU
HDU1 RVTAB BINTABLE RVSpecfit results
HDU2 SPTAB BINTABLE FERRE results
HDU3 FIBERMAP BINTABLE Information about objects inherited from targeting
HDU4 SCORES BINTABLE Information about spectra quality
HDU5 GAIA BINTABLE Gaia crossmatch

FITS Header Units

HDU0

Empty HDU.

HDU1

EXTNAME = RVTAB

This is table of measurements by RVSpecfit of coadded DESI spectra. This table combines the measurements from different survey/program combinations and labels their suggested PRIMARY observation.

Required Header Keywords

.. collapse:: Required Header Keywords Table

    .. rst-class:: keywords

    ======== ================ ==== =====================
    KEY      Example Value    Type Comment
    ======== ================ ==== =====================
    NAXIS1   267              int  length of dimension 1
    NAXIS2   625588           int  length of dimension 2
    CHECKSUM nXheqVeZnVednVeZ str
    DATASUM  2471068207       str
    ======== ================ ==== =====================

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
NEXP int64    
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
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 Target right ascension
TARGET_DEC float64 deg Target declination
TARGETID int64   Unique DESI target ID
SN_B float32   Median S/N in the B arm
SN_R float32   Median S/N in the R arm
SN_Z float32   Median S/N in the Z arm
SUCCESS logical   Did we succeed or fail
HEALPIX int64   HEALPixel containing this location at NSIDE=64 in the NESTED scheme
RR_Z float64   Redrock redshift
RR_SPECTYPE char[6]   Redrock spectroscopic type
SURVEY char[7]   Survey name
PROGRAM char[6]   DESI program type - BRIGHT, DARK, BACKUP, OTHER
PRIMARY logical   If true this is the primary observation of the source

HDU2

EXTNAME = SPTAB

This is table of measurements by FERRE of coadded DESI spectra. This table combines the measurements from different survey/program pairs. This table has exactly the same length as the RVTAB and matches row by row the RVTAB extension.

Required Header Keywords

.. collapse:: Required Header Keywords Table

    .. rst-class:: keywords

    ====== ============= ==== =====================
    KEY    Example Value Type Comment
    ====== ============= ==== =====================
    NAXIS1 458           int  length of dimension 1
    NAXIS2 625588        int  length of dimension 2
    ====== ============= ==== =====================

Required Data Table Columns

.. rst-class:: columns

Name Type Units Description
SUCCESS int64   Bit indicating whether the code has likely produced useful results
TARGETID int64   Unique DESI target ID
TARGET_RA float64 deg Target right ascension
TARGET_DEC float64 deg Target declination
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
SRCFILE char[24]   DESI data file
BESTGRID char[8]   Model grid that produced the best fit
TEFF float64 K Effective temperature (K)
LOGG float64   Surface gravity (g in cm/s**2)
FEH float64   Metallicity [Fe/H] = log10(N(Fe)/N(H)) - log10(N(Fe)/N(H))sun
ALPHAFE float64   Alpha-to-iron ratio [alpha/Fe]
LOG10MICRO float64   Log10 of Microturbulence (km/s)
PARAM float64[5]   Array of atmospheric parameters ([Fe/H], [a/Fe], log10micro, Teff,logg)
COVAR float64[25]   Covariance matrix for ([Fe/H], [a/Fe], log10micro, Teff,logg)
ELEM float64[4]   Elemental abundance ratios to hydrogen [elem/H]
ELEM_ERR float64[4]   Uncertainties in the elemental abundance ratios
CHISQ_TOT float64   Total chi**2
SNR_MED float64   Median signal-to-ratio
RV_ADOP float64 km s-1 Adopted Radial Velocity (km/s)
RV_ERR float64 km s-1 Uncertainty in the adopted Radial Velocity (km/s)
HEALPIX int64   HEALPixel containing this location at NSIDE=64 in the NESTED scheme

HDU3

EXTNAME = FIBERMAP

FIBERMAP table with information on individual targets copied from original coadd file.

Required Header Keywords

.. collapse:: Required Header Keywords Table

    .. rst-class:: keywords

    ====== ============= ==== =====================
    KEY    Example Value Type Comment
    ====== ============= ==== =====================
    NAXIS1 421           int  length of dimension 1
    NAXIS2 625588        int  length of dimension 2
    ====== ============= ==== =====================

Required Data Table Columns

.. rst-class:: columns

Name Type Units Description
TARGETID int64   Unique DESI target ID
COADD_FIBERSTATUS int32   bitwise-AND of input FIBERSTATUS
TARGET_RA float64 deg Target right ascension
TARGET_DEC float64 deg Target declination
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
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
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
CMX_TARGET int64   Target selection bitmask for commissioning
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
PLATE_RA float64 deg Right Ascension to be used by PlateMaker
PLATE_DEC float64 deg Declination to be used by PlateMaker
COADD_NUMEXP int16   Number of exposures in coadd
COADD_EXPTIME float32 s Summed exposure time for coadd
COADD_NUMNIGHT int16   Number of nights in coadd
COADD_NUMTILE int16   Number of tiles in coadd
MEAN_DELTA_X float32 mm Mean (over exposures) fiber difference requested - actual CS5 X location on focal plane
RMS_DELTA_X float32 mm RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane
MEAN_DELTA_Y float32 mm Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane
RMS_DELTA_Y float32 mm RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane
MEAN_FIBER_RA float64 deg Mean (over exposures) RA of actual fiber position
STD_FIBER_RA float32 arcsec Standard deviation (over exposures) of RA of actual fiber position
MEAN_FIBER_DEC float64 deg Mean (over exposures) DEC of actual fiber position
STD_FIBER_DEC float32 arcsec Standard deviation (over exposures) of DEC of actual fiber position
MEAN_PSF_TO_FIBER_SPECFLUX float32   Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing
SCND_TARGET int64   Target selection bitmask for secondary programs
SV1_DESI_TARGET int64   DESI (dark time program) target selection bitmask for SV1
SV1_BGS_TARGET int64   BGS (bright time program) target selection bitmask for SV1
SV1_MWS_TARGET int64   MWS (bright time program) target selection bitmask for SV1
SV1_SCND_TARGET int64   Secondary target selection bitmask for SV1
SV2_DESI_TARGET int64   DESI (dark time program) target selection bitmask for SV2
SV2_BGS_TARGET int64   BGS (bright time program) target selection bitmask for SV2
SV2_MWS_TARGET int64   MWS (bright time program) target selection bitmask for SV2
SV2_SCND_TARGET int64   Secondary target selection bitmask for SV2
SV3_DESI_TARGET int64   DESI (dark time program) target selection bitmask for SV3
SV3_BGS_TARGET int64   BGS (bright time program) target selection bitmask for SV3
SV3_MWS_TARGET int64   MWS (bright time program) target selection bitmask for SV3
SV3_SCND_TARGET int64   Secondary target selection bitmask for SV3

HDU4

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 172           int  length of dimension 1
    NAXIS2 625588        int  length of dimension 2
    ====== ============= ==== =====================

Required Data Table Columns

.. rst-class:: columns

Name Type Units Description
TARGETID int64   Unique DESI target ID
INTEG_COADD_FLUX_B float32    
MEDIAN_COADD_FLUX_B float32    
MEDIAN_COADD_SNR_B float32    
INTEG_COADD_FLUX_R float32    
MEDIAN_COADD_FLUX_R float32    
MEDIAN_COADD_SNR_R float32    
INTEG_COADD_FLUX_Z float32    
MEDIAN_COADD_FLUX_Z float32    
MEDIAN_COADD_SNR_Z float32    
TSNR2_GPBDARK_B float32    
TSNR2_ELG_B float32   ELG B template (S/N)^2
TSNR2_GPBBRIGHT_B float32    
TSNR2_LYA_B float32   LYA B template (S/N)^2
TSNR2_BGS_B float32   BGS B template (S/N)^2
TSNR2_GPBBACKUP_B float32    
TSNR2_QSO_B float32   QSO B template (S/N)^2
TSNR2_LRG_B float32   LRG B template (S/N)^2
TSNR2_GPBDARK_R float32    
TSNR2_ELG_R float32   ELG R template (S/N)^2
TSNR2_GPBBRIGHT_R float32    
TSNR2_LYA_R float32   LYA R template (S/N)^2
TSNR2_BGS_R float32   BGS R template (S/N)^2
TSNR2_GPBBACKUP_R float32    
TSNR2_QSO_R float32   QSO R template (S/N)^2
TSNR2_LRG_R float32   LRG R template (S/N)^2
TSNR2_GPBDARK_Z float32    
TSNR2_ELG_Z float32   ELG Z template (S/N)^2
TSNR2_GPBBRIGHT_Z float32    
TSNR2_LYA_Z float32   LYA Z template (S/N)^2
TSNR2_BGS_Z float32   BGS Z template (S/N)^2
TSNR2_GPBBACKUP_Z float32    
TSNR2_QSO_Z float32   QSO Z template (S/N)^2
TSNR2_LRG_Z float32   LRG Z template (S/N)^2
TSNR2_GPBDARK float32    
TSNR2_ELG float32   ELG template (S/N)^2 summed over B,R,Z
TSNR2_GPBBRIGHT float32    
TSNR2_LYA float32   LYA template (S/N)^2 summed over B,R,Z
TSNR2_BGS float32   BGS template (S/N)^2 summed over B,R,Z
TSNR2_GPBBACKUP float32    
TSNR2_QSO float32   QSO template (S/N)^2 summed over B,R,Z
TSNR2_LRG float32   LRG template (S/N)^2 summed over B,R,Z

HDU5

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 640           int  length of dimension 1
    NAXIS2 625588        int  length of dimension 2
    ====== ============= ==== =====================

Required Data Table Columns

.. rst-class:: columns

Name Type Units Description
SOLUTION_ID int64    
DESIGNATION char[28]    
SOURCE_ID int64    
RANDOM_INDEX int64    
REF_EPOCH float64 yr Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia
RA float64 deg Target Right Ascension
RA_ERROR float32    
DEC float64 deg Target declination
DEC_ERROR float32    
PARALLAX float64 mas Reference catalog parallax
PARALLAX_ERROR float32    
PARALLAX_OVER_ERROR float32    
PM 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    
SCAN_DIRECTION_STRENGTH_K1 float32    
SCAN_DIRECTION_STRENGTH_K2 float32    
SCAN_DIRECTION_STRENGTH_K3 float32    
SCAN_DIRECTION_STRENGTH_K4 float32    
SCAN_DIRECTION_MEAN_K1 float32    
SCAN_DIRECTION_MEAN_K2 float32    
SCAN_DIRECTION_MEAN_K3 float32    
SCAN_DIRECTION_MEAN_K4 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    
PHOT_VARIABLE_FLAG char[20]    
L float64    
B float64    
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    
HAS_MCMC_GSPPHOT logical    
HAS_MCMC_MSC logical    
IN_ANDROMEDA_SURVEY logical    
CLASSPROB_DSC_COMBMOD_QUASAR float32    
CLASSPROB_DSC_COMBMOD_GALAXY float32    
CLASSPROB_DSC_COMBMOD_STAR float32    
TEFF_GSPPHOT float32    
TEFF_GSPPHOT_LOWER float32    
TEFF_GSPPHOT_UPPER float32    
LOGG_GSPPHOT float32    
LOGG_GSPPHOT_LOWER float32    
LOGG_GSPPHOT_UPPER float32    
MH_GSPPHOT float32    
MH_GSPPHOT_LOWER float32    
MH_GSPPHOT_UPPER float32    
DISTANCE_GSPPHOT float32    
DISTANCE_GSPPHOT_LOWER float32    
DISTANCE_GSPPHOT_UPPER float32    
AZERO_GSPPHOT float32    
AZERO_GSPPHOT_LOWER float32    
AZERO_GSPPHOT_UPPER float32    
AG_GSPPHOT float32    
AG_GSPPHOT_LOWER float32    
AG_GSPPHOT_UPPER float32    
EBPMINRP_GSPPHOT float32    
EBPMINRP_GSPPHOT_LOWER float32    
EBPMINRP_GSPPHOT_UPPER float32    
LIBNAME_GSPPHOT char[20]    
EBV float32 mag Galactic extinction E(B-V) reddening from SFD98