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

Required Header Keywords Table

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

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

Required Header Keywords Table

KEY

Example Value

Type

Comment

NAXIS1

458

int

length of dimension 1

NAXIS2

625588

int

length of dimension 2

Required Data Table 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

Required Header Keywords Table

KEY

Example Value

Type

Comment

NAXIS1

421

int

length of dimension 1

NAXIS2

625588

int

length of dimension 2

Required Data Table 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

Required Header Keywords Table

KEY

Example Value

Type

Comment

NAXIS1

172

int

length of dimension 1

NAXIS2

625588

int

length of dimension 2

Required Data Table 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

Required Header Keywords Table

KEY

Example Value

Type

Comment

NAXIS1

640

int

length of dimension 1

NAXIS2

625588

int

length of dimension 2

Required Data Table 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