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 DR3 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. When the objects were oberseved in different surveys/programs, the measurement with the highest signal to noise in the R arm can be identified using PRIMARY column.

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
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. The abundances of different elements in the ELEM array are given in this order Fe, Ca, C, Mg, Si, Na, Cr, Ni, Al, Ti.

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