Astra Source and Spectrum Flags

Astra has numerous flag columns, associated with the SDSS-V target selection, with the astronomical sources, with the spectrum, and with the individual pipelines:

• The target selection flags are in the sdss5_target_flags column, and you should interpret them with the semaphore package.
• The source, APOGEE Spectrum, and BOSS Spectrum flags are inherited from the targeting catalogs and the APOGEE and BOSS Data Reduction Pipelines. They are propagated to many of the Astra output files, and are described below.
• The individual pipelines within Astra also produce their own flags, which are described in the documentation for the individual pipelines.

Some of the flags are bitmasks (with many flags contained within a single variable) and others are individual boolean flags (just one flag per variable). The naming convention in Astra is to name a bitmask column in the form of  [something]_flags  and define individual boolean flags as flag_[some_descriptive_name].

Source flags

Field Name	Bit	Flag Name	Flag Description
sdss4_apogee_target1_flags	0	SDSS4_APOGEE_FAINT	Star selected in faint bin of its cohort
sdss4_apogee_target1_flags	1	SDSS4_APOGEE_MEDIUM	Star selected in medium bin of its cohort
sdss4_apogee_target1_flags	2	SDSS4_APOGEE_BRIGHT	Star selected in bright bin of its cohort
sdss4_apogee_target1_flags	3	SDSS4_APOGEE_IRAC_DERED	Selected w/ RJCE-IRAC dereddening
sdss4_apogee_target1_flags	4	SDSS4_APOGEE_WISE_DERED	Selected w/ RJCE-WISE dereddening
sdss4_apogee_target1_flags	5	SDSS4_APOGEE_SFD_DERED	Selected w/ SFD dereddening
sdss4_apogee_target1_flags	6	SDSS4_APOGEE_NO_DERED	Selected w/ no dereddening
sdss4_apogee_target1_flags	7	SDSS4_APOGEE_WASH_GIANT	Selected as giant using Washington photometry
sdss4_apogee_target1_flags	8	SDSS4_APOGEE_WASH_DWARF	Selected as dwarf using Washington photometry
sdss4_apogee_target1_flags	9	SDSS4_APOGEE_SCI_CLUSTER	Selected as probable cluster member
sdss4_apogee_target1_flags	10	SDSS4_APOGEE_EXTENDED	Extended object
sdss4_apogee_target1_flags	11	SDSS4_APOGEE_SHORT	Selected as ‘short’ (~3 visit) cohort target (includes 1-visit samples)
sdss4_apogee_target1_flags	12	SDSS4_APOGEE_INTERMEDIATE	Selected as ‘intermediate’ cohort (~6-visit) target
sdss4_apogee_target1_flags	13	SDSS4_APOGEE_LONG	Selected as ‘long’ cohort (~12- or 24-visit) target
sdss4_apogee_target1_flags	14	SDSS4_APOGEE_DO_NOT_OBSERVE	Do not observe (again) — undesired dwarf, galaxy, etc
sdss4_apogee_target1_flags	15	SDSS4_APOGEE_SERENDIPITOUS	Serendipitous interesting target to be re-observed
sdss4_apogee_target1_flags	16	SDSS4_APOGEE_FIRST_LIGHT	First Light plate target
sdss4_apogee_target1_flags	17	SDSS4_APOGEE_ANCILLARY	Ancillary target
sdss4_apogee_target1_flags	18	SDSS4_APOGEE_M31_CLUSTER	M31 Clusters (Allende Prieto, Schiavon, Bizyaev, OConnell, Shetrone)
sdss4_apogee_target1_flags	19	SDSS4_APOGEE_MDWARF	RVs of M Dwarfs (Blake, Mahadevan, Hearty, Deshpande, Nidever, Bender, Crepp, Carlberg, Terrien, Schneider) — both original list and second-round extension
sdss4_apogee_target1_flags	20	SDSS4_APOGEE_HIRES	Stars with Optical Hi-Res Spectra (Fabbian, Allende Prieto, Smith, Cunha)
sdss4_apogee_target1_flags	21	SDSS4_APOGEE_OLD_STAR	Oldest Stars in Galaxy (Harding, Johnson)
sdss4_apogee_target1_flags	22	SDSS4_APOGEE_DISK_RED_GIANT	Ages/Compositions? of Disk Red Giants (Johnson, Epstein, Pinsonneault, Lai, Bird, Schonrich, Chiappini)
sdss4_apogee_target1_flags	23	SDSS4_APOGEE_KEPLER_EB	Kepler EBs (Mahadevan, Fleming, Bender, Deshpande, Hearty, Nidever, Terrien)
sdss4_apogee_target1_flags	24	SDSS4_APOGEE_GC_PAL1	Globular Cluster Pops in the MW (Simmerer, Ivans, Shetrone)
sdss4_apogee_target1_flags	25	SDSS4_APOGEE_MASSIVE_STAR	Massive Stars in the MW (Herrero, Garcia-Garcia, Ramirez-Alegria)
sdss4_apogee_target1_flags	26	SDSS4_APOGEE_SGR_DSPH	Sgr (dSph) member
sdss4_apogee_target1_flags	27	SDSS4_APOGEE_KEPLER_SEISMO	Kepler asteroseismology program target (Epstein)
sdss4_apogee_target1_flags	28	SDSS4_APOGEE_KEPLER_HOST	Planet-host program target (Epstein)
sdss4_apogee_target1_flags	29	SDSS4_APOGEE_FAINT_EXTRA	Faint’ target in low-target-density fields
sdss4_apogee_target1_flags	30	SDSS4_APOGEE_SEGUE_OVERLAP	SEGUE overlap
sdss4_apogee_target2_flags	0	SDSS4_APOGEE_LIGHT_TRAP	Light trap
sdss4_apogee_target2_flags	1	SDSS4_APOGEE_FLUX_STANDARD	Flux standard
sdss4_apogee_target2_flags	2	SDSS4_APOGEE_STANDARD_STAR	Stellar abundance/parameters standard
sdss4_apogee_target2_flags	3	SDSS4_APOGEE_RV_STANDARD	RV standard
sdss4_apogee_target2_flags	4	SDSS4_APOGEE_SKY	Sky
sdss4_apogee_target2_flags	5	SDSS4_APOGEE_SKY_BAD	Selected as sky but IDed as bad (via visual examination or observation)
sdss4_apogee_target2_flags	6	SDSS4_APOGEE_GUIDE_STAR	Guide star
sdss4_apogee_target2_flags	7	SDSS4_APOGEE_BUNDLE_HOLE	Bundle hole
sdss4_apogee_target2_flags	8	SDSS4_APOGEE_TELLURIC_BAD	Selected as telluric std but IDed as too red (via SIMBAD or observation)
sdss4_apogee_target2_flags	10	SDSS4_APOGEE_CALIB_CLUSTER	Known calibration cluster member
sdss4_apogee_target2_flags	11	SDSS4_APOGEE_BULGE_GIANT	Selected as probable giant in bulge
sdss4_apogee_target2_flags	12	SDSS4_APOGEE_BULGE_SUPER_GIANT	Selected as probable supergiant in bulge
sdss4_apogee_target2_flags	13	SDSS4_APOGEE_EMBEDDED_CLUSTER_STAR	Young nebulous clusters (Covey, Tan)
sdss4_apogee_target2_flags	14	SDSS4_APOGEE_LONG_BAR	Milky Way Long Bar (Zasowski)
sdss4_apogee_target2_flags	15	SDSS4_APOGEE_EMISSION_STAR	Be Emission Line Stars (Chojnowski, Whelan)
sdss4_apogee_target2_flags	16	SDSS4_APOGEE_KEPLER_COOL_DWARF	Kepler Cool Dwarfs (van Saders)
sdss4_apogee_target2_flags	17	SDSS4_APOGEE_MIR_CLUSTER_STAR	Outer Disk MIR Clusters (Beaton)
sdss4_apogee_target2_flags	18	SDSS4_APOGEE_RV_MONITOR_IC348	RV Variability in IC348 (Nidever, Covey)
sdss4_apogee_target2_flags	19	SDSS4_APOGEE_RV_MONITOR_KEPLER	RV Variability for Kepler Planet Hosts and Binaries (Deshpande, Fleming, Mahadevan)
sdss4_apogee_target2_flags	20	SDSS4_APOGEE_GES_CALIBRATE	Gaia-ESO calibration targets
sdss4_apogee_target2_flags	21	SDSS4_APOGEE_BULGE_RV_VERIFY	RV Verification (Nidever)
sdss4_apogee_target2_flags	22	SDSS4_APOGEE_1M_TARGET	Selected as a 1-m target (Holtzman)
sdss4_apogee_extra_target_flags	0	SDSS4_APOGEE_NOT_MAIN	Not a main sample target
sdss4_apogee_extra_target_flags	1	SDSS4_APOGEE_COMMISSIONING	Commissioning observation
sdss4_apogee_extra_target_flags	2	SDSS4_APOGEE_TELLURIC	Targeted as telluric
sdss4_apogee_extra_target_flags	3	SDSS4_APOGEE_APO1M	APO/NMSU 1M observation
sdss4_apogee_extra_target_flags	4	SDSS4_APOGEE_DUPLICATE	Non-primary (not highest S/N) duplicate, excluding SDSS-5
sdss4_apogee2_target1_flags	0	SDSS4_APOGEE2_ONEBIT_GT_0_5	Selected in single (J-Ks)o > 0.5 color bin
sdss4_apogee2_target1_flags	1	SDSS4_APOGEE2_TWOBIT_0_5_TO_0_8	Selected in ‘blue’ 0.5 < (J-Ks)o < 0.8 color bin
sdss4_apogee2_target1_flags	2	SDSS4_APOGEE2_TWOBIT_GT_0_8	Selected in ‘red’ (J-Ks)o > 0.8 color bin
sdss4_apogee2_target1_flags	3	SDSS4_APOGEE2_IRAC_DERED	Selected with RJCE-IRAC dereddening
sdss4_apogee2_target1_flags	4	SDSS4_APOGEE2_WISE_DERED	Selected with RJCE-WISE dereddening
sdss4_apogee2_target1_flags	5	SDSS4_APOGEE2_SFD_DERED	Selected with SFD_EBV dereddening
sdss4_apogee2_target1_flags	6	SDSS4_APOGEE2_NO_DERED	Selected with no dereddening
sdss4_apogee2_target1_flags	7	SDSS4_APOGEE2_WASH_GIANT	Selected as Wash+DDO51 photometric giant
sdss4_apogee2_target1_flags	8	SDSS4_APOGEE2_WASH_DWARF	Selected as Wash+DDO51 photometric dwarf
sdss4_apogee2_target1_flags	9	SDSS4_APOGEE2_SCI_CLUSTER	Science cluster candidate member
sdss4_apogee2_target1_flags	10	SDSS4_APOGEE2_CLUSTER_CANDIDATE	Selected as globular cluster candidate
sdss4_apogee2_target1_flags	11	SDSS4_APOGEE2_SHORT	Selected as part of a short cohort
sdss4_apogee2_target1_flags	12	SDSS4_APOGEE2_MEDIUM	Selected as part of a medium cohort
sdss4_apogee2_target1_flags	13	SDSS4_APOGEE2_LONG	Selected as part of a long cohort
sdss4_apogee2_target1_flags	14	SDSS4_APOGEE2_NORMAL_SAMPLE	Selected as part of the random sample
sdss4_apogee2_target1_flags	15	SDSS4_APOGEE2_MANGA_LED	Star on a shared MaNGA-led design
sdss4_apogee2_target1_flags	16	SDSS4_APOGEE2_ONEBIN_GT_0_3	Selected in single (J-Ks)o > 0.3 color bin
sdss4_apogee2_target1_flags	17	SDSS4_APOGEE2_WASH_NOCLASS	Selected because it has no W+D classification
sdss4_apogee2_target1_flags	18	SDSS4_APOGEE2_STREAM_MEMBER	Selected as confirmed halo tidal stream member
sdss4_apogee2_target1_flags	19	SDSS4_APOGEE2_STREAM_CANDIDATE	Selected as potential halo tidal stream member (based on photometry)
sdss4_apogee2_target1_flags	20	SDSS4_APOGEE2_DSPH_MEMBER	Selected as confirmed dSph member (non Sgr)
sdss4_apogee2_target1_flags	21	SDSS4_APOGEE2_DSPH_CANDIDATE	Selected as potential dSph member (non Sgr) (based on photometry)
sdss4_apogee2_target1_flags	22	SDSS4_APOGEE2_MAGCLOUD_MEMBER	Selected as confirmed Mag Cloud member
sdss4_apogee2_target1_flags	23	SDSS4_APOGEE2_MAGCLOUD_CANDIDATE	Selected as potential Mag Cloud member (based on photometry)
sdss4_apogee2_target1_flags	24	SDSS4_APOGEE2_RRLYR	Selected as an RR Lyrae star
sdss4_apogee2_target1_flags	25	SDSS4_APOGEE2_BULGE_RC	Selected as a bulge candidate RC star
sdss4_apogee2_target1_flags	26	SDSS4_APOGEE2_SGR_DSPH	Selected as confirmed Sgr core/stream member
sdss4_apogee2_target1_flags	27	SDSS4_APOGEE2_APOKASC_GIANT	Selected as part of APOKASC ‘giant’ sample
sdss4_apogee2_target1_flags	28	SDSS4_APOGEE2_APOKASC_DWARF	Selected as part of APOKASC ‘dwarf’ sample
sdss4_apogee2_target1_flags	29	SDSS4_APOGEE2_FAINT_EXTRA	Faint’ star (fainter than cohort limit; not required to reach survey S/N requirement)
sdss4_apogee2_target1_flags	30	SDSS4_APOGEE2_APOKASC	Selected as part of the APOKASC program (incl. seismic/gyro targets and others, both the Cygnus field and K2)
sdss4_apogee2_target2_flags	0	SDSS4_APOGEE2_K2_GAP	K2 Galactic Archeology Program Star
sdss4_apogee2_target2_flags	1	SDSS4_APOGEE2_CCLOUD_AS4	California Cloud target
sdss4_apogee2_target2_flags	2	SDSS4_APOGEE2_STANDARD_STAR	Stellar parameters/abundance standard
sdss4_apogee2_target2_flags	3	SDSS4_APOGEE2_RV_STANDARD	Stellar RV standard
sdss4_apogee2_target2_flags	4	SDSS4_APOGEE2_SKY	Sky fiber
sdss4_apogee2_target2_flags	5	SDSS4_APOGEE2_EXTERNAL_CALIB	External survey calibration target (generic flag; others below dedicated to specific surveys)
sdss4_apogee2_target2_flags	6	SDSS4_APOGEE2_INTERNAL_CALIB	Internal survey calibration target (observed in at least 2 of: APOGEE-1, -2N, -2S)
sdss4_apogee2_target2_flags	7	SDSS4_APOGEE2_DISK_SUBSTRUCTURE_MEMBER	Bright time extension: outer disk substructure (Triand, GASS, and A13) members
sdss4_apogee2_target2_flags	8	SDSS4_APOGEE2_DISK_SUBSTRUCTURE_CANDIDATE	Bright time extension: outer disk substructure (Triand, GASS, and A13) candidates
sdss4_apogee2_target2_flags	9	SDSS4_APOGEE2_TELLURIC	Telluric standard
sdss4_apogee2_target2_flags	10	SDSS4_APOGEE2_CALIB_CLUSTER	Selected as calibration cluster member
sdss4_apogee2_target2_flags	11	SDSS4_APOGEE2_K2_PLANET_HOST	Planet host in the K2 field
sdss4_apogee2_target2_flags	12	SDSS4_APOGEE2_TIDAL_BINARY	Ancillary KOI Program (Simonian)
sdss4_apogee2_target2_flags	13	SDSS4_APOGEE2_LITERATURE_CALIB	Overlap with high-resolution literature studies
sdss4_apogee2_target2_flags	14	SDSS4_APOGEE2_GES_OVERLAP	Overlap with Gaia-ESO
sdss4_apogee2_target2_flags	15	SDSS4_APOGEE2_ARGOS_OVERLAP	Overlap with ARGOS
sdss4_apogee2_target2_flags	16	SDSS4_APOGEE2_GAIA_OVERLAP	Overlap with Gaia
sdss4_apogee2_target2_flags	17	SDSS4_APOGEE2_GALAH_OVERLAP	Overlap with GALAH
sdss4_apogee2_target2_flags	18	SDSS4_APOGEE2_RAVE_OVERLAP	Overlap with RAVE
sdss4_apogee2_target2_flags	19	SDSS4_APOGEE2_COMMIS_SOUTH_SPEC	Commissioning special targets for APOGEE2S
sdss4_apogee2_target2_flags	20	SDSS4_APOGEE2_HALO_MEMBER	Halo Member
sdss4_apogee2_target2_flags	21	SDSS4_APOGEE2_HALO_CANDIDATE	Halo Candidate
sdss4_apogee2_target2_flags	22	SDSS4_APOGEE2_1M_TARGET	Selected as a 1-m target
sdss4_apogee2_target2_flags	23	SDSS4_APOGEE2_MOD_BRIGHT_LIMIT	Selected in a cohort with H>10 rather than H>7
sdss4_apogee2_target2_flags	24	SDSS4_APOGEE2_CIS	Carnegie program target
sdss4_apogee2_target2_flags	25	SDSS4_APOGEE2_CNTAC	Chilean community target
sdss4_apogee2_target2_flags	26	SDSS4_APOGEE2_EXTERNAL	Proprietary external target
sdss4_apogee2_target2_flags	27	SDSS4_APOGEE2_CVZ_AS4_OBAF	OBAF stars selected for multi-epoc observations Andrew T.
sdss4_apogee2_target2_flags	28	SDSS4_APOGEE2_CVZ_AS4_GI	Submitted program to be on CVZ plate (Known Planets, ATL, Tayar-Subgiant, Canas-Cool-dwarf)
sdss4_apogee2_target2_flags	29	SDSS4_APOGEE2_CVZ_AS4_CTL	Filler CTL star selected from the TESS Input Catalog
sdss4_apogee2_target2_flags	30	SDSS4_APOGEE2_CVZ_AS4_GIANT	Filler Giant selected with RPMJ
sdss4_apogee2_target3_flags	0	SDSS4_APOGEE2_KOI	Selected as part of the long cadence KOI study
sdss4_apogee2_target3_flags	1	SDSS4_APOGEE2_EB	Selected as part of the EB program
sdss4_apogee2_target3_flags	2	SDSS4_APOGEE2_KOI_CONTROL	Selected as part of the long cadence KOI ‘control sample’
sdss4_apogee2_target3_flags	3	SDSS4_APOGEE2_MDWARF	Selected as part of the M dwarf study
sdss4_apogee2_target3_flags	4	SDSS4_APOGEE2_SUBSTELLAR_COMPANIONS	Selected as part of the substellar companion search
sdss4_apogee2_target3_flags	5	SDSS4_APOGEE2_YOUNG_CLUSTER	Selected as part of the young cluster study (IN-SYNC)
sdss4_apogee2_target3_flags	6	SDSS4_APOGEE2_K2	Selected as part of the K2 program (BTX and Main Survey)
sdss4_apogee2_target3_flags	7	SDSS4_APOGEE2_OBJECT	This object is an APOGEE-2 target
sdss4_apogee2_target3_flags	8	SDSS4_APOGEE2_ANCILLARY	Selected as an ancillary target
sdss4_apogee2_target3_flags	9	SDSS4_APOGEE2_MASSIVE_STAR	Selected as part of the Massive Star program
sdss4_apogee2_target3_flags	10	SDSS4_APOGEE2_QSO	Ancillary QSO pilot program (Albareti)
sdss4_apogee2_target3_flags	11	SDSS4_APOGEE2_CEPHEID	Ancillary Cepheid sparse targets (Beaton)
sdss4_apogee2_target3_flags	12	SDSS4_APOGEE2_LOW_AV_WINDOWS	Ancillary Deep Disk sample (Bovy)
sdss4_apogee2_target3_flags	13	SDSS4_APOGEE2_BE_STAR	Ancillary ASHELS sample (Chojnowski)
sdss4_apogee2_target3_flags	14	SDSS4_APOGEE2_YOUNG_MOVING_GROUP	Ancillary young moving group members (Downes)
sdss4_apogee2_target3_flags	15	SDSS4_APOGEE2_NGC6791	Ancillary NGC 6791 star (Geisler)
sdss4_apogee2_target3_flags	16	SDSS4_APOGEE2_LABEL_STAR	Ancillary Cannon calibrator Sample (Ness)
sdss4_apogee2_target3_flags	17	SDSS4_APOGEE2_FAINT_KEPLER_GIANTS	Ancillary APOKASC faint giants (Pinsonneault)
sdss4_apogee2_target3_flags	18	SDSS4_APOGEE2_W345	Ancillary W3/4/5 star forming complex (Roman-Lopes)
sdss4_apogee2_target3_flags	19	SDSS4_APOGEE2_MASSIVE_EVOLVED	Ancillary massive/evolved star targets (Stringfellow)
sdss4_apogee2_target3_flags	20	SDSS4_APOGEE2_EXTINCTION	Ancillary extinction targets (Schlafly)
sdss4_apogee2_target3_flags	21	SDSS4_APOGEE2_KEPLER_MDWARF_KOI	Ancillary M dwarf targets (Smith)
sdss4_apogee2_target3_flags	22	SDSS4_APOGEE2_AGB	Ancillary AGB sample (Zamora)
sdss4_apogee2_target3_flags	23	SDSS4_APOGEE2_M33	Ancillary M33 Program (Anguiano)
sdss4_apogee2_target3_flags	24	SDSS4_APOGEE2_ULTRACOOL	Ancillary Ultracool Dwarfs Program (Burgasser)
sdss4_apogee2_target3_flags	25	SDSS4_APOGEE2_DISTANT_SEGUE_GIANTS	Ancillary Distant SEGUE Giants program (Harding)
sdss4_apogee2_target3_flags	26	SDSS4_APOGEE2_CEPHEID_MAPPING	Ancillary Cepheid Mapping Program (Inno)
sdss4_apogee2_target3_flags	27	SDSS4_APOGEE2_SA57	Ancillary SA57 Kapteyn Field Program (Majewski)
sdss4_apogee2_target3_flags	28	SDSS4_APOGEE2_K2_MDWARF	Ancillary K2 M dwarf Program (Smith)
sdss4_apogee2_target3_flags	29	SDSS4_APOGEE2_RVVAR	Ancillary RV Variables Program (Troup)
sdss4_apogee2_target3_flags	30	SDSS4_APOGEE2_M31	Ancillary M31 Program (Zasowski)
sdss4_apogee_member_flags	0	SDSS4_APOGEE_MEMBER_M92	Likely member of M92
sdss4_apogee_member_flags	1	SDSS4_APOGEE_MEMBER_M15	Likely member of M15
sdss4_apogee_member_flags	2	SDSS4_APOGEE_MEMBER_M53	Likely member of M53
sdss4_apogee_member_flags	3	SDSS4_APOGEE_MEMBER_NGC_5466	Likely member of NGC 5466
sdss4_apogee_member_flags	4	SDSS4_APOGEE_MEMBER_NGC_4147	Likely member of NGC 4147
sdss4_apogee_member_flags	5	SDSS4_APOGEE_MEMBER_M2	Likely member of M2
sdss4_apogee_member_flags	6	SDSS4_APOGEE_MEMBER_M13	Likely member of M13
sdss4_apogee_member_flags	7	SDSS4_APOGEE_MEMBER_M3	Likely member of M3
sdss4_apogee_member_flags	8	SDSS4_APOGEE_MEMBER_M5	Likely member of M5
sdss4_apogee_member_flags	9	SDSS4_APOGEE_MEMBER_M12	Likely member of M12
sdss4_apogee_member_flags	10	SDSS4_APOGEE_MEMBER_M107	Likely member of M107
sdss4_apogee_member_flags	11	SDSS4_APOGEE_MEMBER_M71	Likely member of M71
sdss4_apogee_member_flags	12	SDSS4_APOGEE_MEMBER_NGC_2243	Likely member of NGC 2243
sdss4_apogee_member_flags	13	SDSS4_APOGEE_MEMBER_BE29	Likely member of Be29
sdss4_apogee_member_flags	14	SDSS4_APOGEE_MEMBER_NGC_2158	Likely member of NGC 2158
sdss4_apogee_member_flags	15	SDSS4_APOGEE_MEMBER_M35	Likely member of M35
sdss4_apogee_member_flags	16	SDSS4_APOGEE_MEMBER_NGC_2420	Likely member of NGC 2420
sdss4_apogee_member_flags	17	SDSS4_APOGEE_MEMBER_NGC_188	Likely member of NGC 188
sdss4_apogee_member_flags	18	SDSS4_APOGEE_MEMBER_M67	Likely member of M67
sdss4_apogee_member_flags	19	SDSS4_APOGEE_MEMBER_NGC_7789	Likely member of NGC 7789
sdss4_apogee_member_flags	20	SDSS4_APOGEE_MEMBER_PLEIADES	Likely member of Pleiades
sdss4_apogee_member_flags	21	SDSS4_APOGEE_MEMBER_NGC_6819	Likely member of NGC 6819
sdss4_apogee_member_flags	22	SDSS4_APOGEE_MEMBER_COMA_BERENICES	Likely member of Coma Berenices
sdss4_apogee_member_flags	23	SDSS4_APOGEE_MEMBER_NGC_6791	Likely member of NGC 6791
sdss4_apogee_member_flags	24	SDSS4_APOGEE_MEMBER_NGC_5053	Likely member of NGC 5053
sdss4_apogee_member_flags	25	SDSS4_APOGEE_MEMBER_M68	Likely member of M68
sdss4_apogee_member_flags	26	SDSS4_APOGEE_MEMBER_NGC_6397	Likely member of NGC 6397
sdss4_apogee_member_flags	27	SDSS4_APOGEE_MEMBER_M55	Likely member of M55
sdss4_apogee_member_flags	28	SDSS4_APOGEE_MEMBER_NGC_5634	Likely member of NGC 5634
sdss4_apogee_member_flags	29	SDSS4_APOGEE_MEMBER_M22	Likely member of M22
sdss4_apogee_member_flags	30	SDSS4_APOGEE_MEMBER_M79	Likely member of M79
sdss4_apogee_member_flags	31	SDSS4_APOGEE_MEMBER_NGC_3201	Likely member of NGC 3201
sdss4_apogee_member_flags	32	SDSS4_APOGEE_MEMBER_M10	Likely member of M10
sdss4_apogee_member_flags	33	SDSS4_APOGEE_MEMBER_NGC_6752	Likely member of NGC 6752
sdss4_apogee_member_flags	34	SDSS4_APOGEE_MEMBER_OMEGA_CENTAURI	Likely member of Omega Centauri
sdss4_apogee_member_flags	35	SDSS4_APOGEE_MEMBER_M54	Likely member of M54
sdss4_apogee_member_flags	36	SDSS4_APOGEE_MEMBER_NGC_6229	Likely member of NGC 6229
sdss4_apogee_member_flags	37	SDSS4_APOGEE_MEMBER_PAL5	Likely member of Pal5
sdss4_apogee_member_flags	38	SDSS4_APOGEE_MEMBER_NGC_6544	Likely member of NGC 6544
sdss4_apogee_member_flags	39	SDSS4_APOGEE_MEMBER_NGC_6522	Likely member of NGC 6522
sdss4_apogee_member_flags	40	SDSS4_APOGEE_MEMBER_NGC_288	Likely member of NGC 288
sdss4_apogee_member_flags	41	SDSS4_APOGEE_MEMBER_NGC_362	Likely member of NGC 362
sdss4_apogee_member_flags	42	SDSS4_APOGEE_MEMBER_NGC_1851	Likely member of NGC 1851
sdss4_apogee_member_flags	43	SDSS4_APOGEE_MEMBER_M4	Likely member of M4
sdss4_apogee_member_flags	44	SDSS4_APOGEE_MEMBER_NGC_2808	Likely member of NGC 2808
sdss4_apogee_member_flags	45	SDSS4_APOGEE_MEMBER_PAL6	Likely member of Pal6
sdss4_apogee_member_flags	46	SDSS4_APOGEE_MEMBER_47TUC	Likely member of 47 Tucane
sdss4_apogee_member_flags	47	SDSS4_APOGEE_MEMBER_PAL1	Likely member of Pal1
sdss4_apogee_member_flags	48	SDSS4_APOGEE_MEMBER_NGC_6539	Likely member of NGC 6539
sdss4_apogee_member_flags	49	SDSS4_APOGEE_MEMBER_NGC_6388	Likely member of NGC 6388
sdss4_apogee_member_flags	50	SDSS4_APOGEE_MEMBER_NGC_6441	Likely member of NGC 6441
sdss4_apogee_member_flags	51	SDSS4_APOGEE_MEMBER_NGC_6316	Likely member of NGC 6316
sdss4_apogee_member_flags	52	SDSS4_APOGEE_MEMBER_NGC_6760	Likely member of NGC 6760
sdss4_apogee_member_flags	53	SDSS4_APOGEE_MEMBER_NGC_6553	Likely member of NGC 6553
sdss4_apogee_member_flags	54	SDSS4_APOGEE_MEMBER_NGC_6528	Likely member of NGC 6528
sdss4_apogee_member_flags	55	SDSS4_APOGEE_MEMBER_DRACO	Likely member of Draco
sdss4_apogee_member_flags	56	SDSS4_APOGEE_MEMBER_URMINOR	Likely member of Ursa Minor
sdss4_apogee_member_flags	57	SDSS4_APOGEE_MEMBER_BOOTES1	Likely member of Bootes 1
sdss4_apogee_member_flags	58	SDSS4_APOGEE_MEMBER_SEXANS	Likely member of Sextans
sdss4_apogee_member_flags	59	SDSS4_APOGEE_MEMBER_FORNAX	Likely member of Fornax
sdss4_apogee_member_flags	60	SDSS4_APOGEE_MEMBER_SCULPTOR	Likely member of Sculptor
sdss4_apogee_member_flags	61	SDSS4_APOGEE_MEMBER_CARINA	Likely member of Carina
w1uflags	0	UNWISE_W1_IN_CORE_OR_WINGS	In core or wings
w1uflags	1	UNWISE_W1_IN_DIFFRACTION_SPIKE	In diffraction spike
w1uflags	2	UNWISE_W1_IN_GHOST	In ghost
w1uflags	3	UNWISE_W1_IN_FIRST_LATENT	In first latent
w1uflags	4	UNWISE_W1_IN_SECOND_LATENT	In second latent
w1uflags	5	UNWISE_W1_IN_CIRCULAR_HALO	In circular halo
w1uflags	6	UNWISE_W1_SATURATED	Saturated
w1uflags	7	UNWISE_W1_IN_GEOMETRIC_DIFFRACTION_SPIKE	In geometric diffraction spike
w2uflags	0	UNWISE_W2_IN_CORE_OR_WINGS	In core or wings
w2uflags	1	UNWISE_W2_IN_DIFFRACTION_SPIKE	In diffraction spike
w2uflags	2	UNWISE_W2_IN_GHOST	In ghost
w2uflags	3	UNWISE_W2_IN_FIRST_LATENT	In first latent
w2uflags	4	UNWISE_W2_IN_SECOND_LATENT	In second latent
w2uflags	5	UNWISE_W2_IN_CIRCULAR_HALO	In circular halo
w2uflags	6	UNWISE_W2_SATURATED	Saturated
w2uflags	7	UNWISE_W2_IN_GEOMETRIC_DIFFRACTION_SPIKE	In geometric diffraction spike
w1aflags	0	UNWISE_W1_IN_BRIGHT_STAR_PSF	In PSF of bright star falling off coadd
w1aflags	1	UNWISE_W1_IN_HYPERLEDA_GALAXY	In HyperLeda large galaxy
w1aflags	2	UNWISE_W1_IN_BIG_OBJECT	In “big object” (e.g., a Magellanic cloud)
w1aflags	3	UNWISE_W1_PIXEL_IN_VERY_BRIGHT_STAR_CENTROID	Pixel may contain the centroid of a very bright star
w1aflags	4	UNWISE_W1_CROWDSOURCE_SATURATION	crowdsource considers this pixel potentially affected by saturation
w1aflags	5	UNWISE_W1_POSSIBLE_NEBULOSITY	Pixel may contain nebulosity
w1aflags	6	UNWISE_W1_NO_AGGRESSIVE_DEBLEND	Sources in this pixel will not be aggressively deblended
w1aflags	7	UNWISE_W1_CANDIDATE_SOURCES_MUST_BE_SHARP	Candidate sources in this pixel must be “sharp” to be optimized
w2aflags	0	UNWISE_W2_IN_BRIGHT_STAR_PSF	In PSF of bright star falling off coadd
w2aflags	1	UNWISE_W2_IN_HYPERLEDA_GALAXY	In HyperLeda large galaxy
w2aflags	2	UNWISE_W2_IN_BIG_OBJECT	In “big object” (e.g., a Magellanic cloud)
w2aflags	3	UNWISE_W2_PIXEL_IN_VERY_BRIGHT_STAR_CENTROID	Pixel may contain the centroid of a very bright star
w2aflags	4	UNWISE_W2_CROWDSOURCE_SATURATION	crowdsource considers this pixel potentially affected by saturation
w2aflags	5	UNWISE_W2_POSSIBLE_NEBULOSITY	Pixel may contain nebulosity
w2aflags	6	UNWISE_W2_NO_AGGRESSIVE_DEBLEND	Sources in this pixel will not be aggressively deblended
w2aflags	7	UNWISE_W2_CANDIDATE_SOURCES_MUST_BE_SHARP	Candidate sources in this pixel must be “sharp” to be optimized
sqf_4_5	0	GLIMPSE_POOR_DARK_PIXEL_CURRENT	Poor pixels in dark current
sqf_4_5	1	GLIMPSE_FLAT_FIELD_QUESTIONABLE	Flat field applied using questionable value
sqf_4_5	2	GLIMPSE_LATENT_IMAGE	Latent image
sqf_4_5	3	GLIMPSE_SATURATED_STAR_CORRECTION	Sat star correction
sqf_4_5	6	GLIMPSE_MUXBLEED_CORRECTION_APPLIED	Muxbleed correction applied
sqf_4_5	7	GLIMPSE_HOT_OR_DEAD_PIXELS	Hot, dead or otherwise unacceptable pixel
sqf_4_5	8	GLIMPSE_MUXBLEED_SIGNIFICANT	Muxbleed > 3-sigma above the background
sqf_4_5	9	GLIMPSE_ALLSTAR_TWEAK_POSITIVE	Allstar tweak positive
sqf_4_5	10	GLIMPSE_ALLSTAR_TWEAK_NEGATIVE	Allstar tweak negative
sqf_4_5	12	GLIMPSE_CONFUSION_IN_BAND_MERGE	Confusion in in-band merge
sqf_4_5	13	GLIMPSE_CONFUSION_IN_CROSS_BAND_MERGE	Confusion in cross-band merge
sqf_4_5	14	GLIMPSE_COLUMN_PULLDOWN_CORRECTION	Column pulldown correction
sqf_4_5	15	GLIMPSE_BANDING_CORRECTION	Banding correction
sqf_4_5	16	GLIMPSE_STRAY_LIGHT	Stray light
sqf_4_5	18	GLIMPSE_NO_NONLINEAR_CORRECTION	Nonlinear correction not applied
sqf_4_5	19	GLIMPSE_SATURATED_STAR_WING_REGION	Saturated star wing region
sqf_4_5	20	GLIMPSE_PRE_LUMPING_IN_BAND_MERGE	Pre-lumping in in-band merge
sqf_4_5	21	GLIMPSE_POST_LUMPING_IN_CROSS_BAND_MERGE	Post-lumping in cross-band merge
sqf_4_5	29	GLIMPSE_EDGE_OF_FRAME	Edge of frame (within 3 pixels of edge)
sqf_4_5	30	GLIMPSE_TRUTH_LIST	Truth list (for simulated data)
csf	0	GLIMPSE_NO_SOURCE_WITHIN_3_ARCSECOND	No GLIMPSE sources within 3″ of this source
csf	1	GLIMPSE_1_SOURCE_WITHIN_2P5_AND_3_ARCSECOND	1 source in GLIMPSE between 2.5″ and 3″ of this source
csf	2	GLIMPSE_2_SOURCES_WITHIN_2_AND_2P5_ARCSECOND	2 sources in GLIMPSE within 2″ and 2.5″ of this source
csf	3	GLIMPSE_3_SOURCES_WITHIN_1P5_AND_2_ARCSECOND	3 sources in GLIMPSE within 1.5″ and 2″ of this source
csf	4	GLIMPSE_4_SOURCES_WITHIN_1_AND_1P5_ARCSECOND	4 sources in GLIMPSE within 1″ and 1.5″ of this source
csf	5	GLIMPSE_5_SOURCES_WITHIN_0P5_AND_1_ARCSECOND	5 sources in GLIMPSE within 0.5″ and 1.0″ of this source
csf	6	GLIMPSE_6_SOURCES_WITHIN_0P5_ARCSECOND	6 sources in GLIMPSE within 0.5″ of this source
ebv_flags	0	EBV_UPPER_LIMIT	E(B-V) is an upper limit
ebv_flags	1	EBV_FROM_ZHANG_2023	E(B-V) from Zhang et al. (2023)
ebv_flags	2	EBV_FROM_EDENHOFER_2023	E(B-V) from Edenhofer et al. (2023)
ebv_flags	3	EBV_FROM_SFD	E(B-V) from SFD
ebv_flags	4	EBV_FROM_RJCE_GLIMPSE	E(B-V) from RJCE GLIMPSE
ebv_flags	5	EBV_FROM_RJCE_ALLWISE	E(B-V) from RJCE AllWISE
ebv_flags	6	EBV_FROM_BAYESTAR_2019	E(B-V) from Bayestar 2019

APOGEE Spectrum Flags

Field Name	Bit	Flag Name	Flag Description
spectrum_flags	0	BAD_PIXELS	Spectrum has many bad pixels (>20%).
spectrum_flags	1	COMMISSIONING	Commissioning data (MJD <55761); non-standard configuration; poor LSF.
spectrum_flags	2	BRIGHT_NEIGHBOR	Star has neighbor more than 10 times brighter.
spectrum_flags	3	VERY_BRIGHT_NEIGHBOR	Star has neighbor more than 100 times brighter.
spectrum_flags	4	LOW_SNR	Spectrum has low S/N (<5).
spectrum_flags	9	PERSIST_HIGH	Spectrum has at least 20% of pixels in high persistence region.
spectrum_flags	10	PERSIST_MED	Spectrum has at least 20% of pixels in medium persistence region.
spectrum_flags	11	PERSIST_LOW	Spectrum has at least 20% of pixels in low persistence region.
spectrum_flags	12	PERSIST_JUMP_POS	Spectrum has obvious positive jump in blue chip.
spectrum_flags	13	PERSIST_JUMP_NEG	Spectrum has obvious negative jump in blue chip.
spectrum_flags	16	SUSPECT_RV_COMBINATION	RVs from synthetic template differ significantly (~2 km/s) from those from combined template.
spectrum_flags	17	SUSPECT_BROAD_LINES	Cross-correlation peak with template significantly broader than autocorrelation of template.
spectrum_flags	18	BAD_RV_COMBINATION	RVs from synthetic template differ very significantly (~10 km/s) from those from combined template.
spectrum_flags	19	RV_REJECT	Rejected visit because cross-correlation RV differs significantly from least squares RV.
spectrum_flags	20	RV_SUSPECT	Suspect visit (but used!) because cross-correlation RV differs slightly from least squares RV.
spectrum_flags	21	MULTIPLE_SUSPECT	Suspect multiple components from Gaussian decomposition of cross-correlation.
spectrum_flags	22	RV_FAILURE	RV failure.
spectrum_flags	23	SUSPECT_ROTATION	Suspect rotation: cross-correlation peak with template significantly broader than autocorretion of template
spectrum_flags	24	MTPFLUX_LT_75	Spectrum falls on fiber in MTP block with relative flux < 0.75
spectrum_flags	25	MTPFLUX_LT_50	Spectrum falls on fiber in MTP block with relative flux < 0.5

BOSS Spectrum Flags

Field Name	Bit	Flag Name	Flag Description
gri_gaia_transform_flags	0	U_GAIA_TRANSFORMED	u photometry provided for plate design is transformed from Gaia mags.
gri_gaia_transform_flags	1	U_GAIA_OUTSIDE	u photometry cannot be calculated from Gaia photometry as it lies outside range of colors for which transforms are defined
gri_gaia_transform_flags	2	U_GAIA_NONE	u photometry cannot be calculated for this source
gri_gaia_transform_flags	3	G_GAIA_TRANSFORMED	g photometry provided for plate design is transformed from Gaia mags.
gri_gaia_transform_flags	4	G_GAIA_OUTSIDE	g photometry cannot be calculated from Gaia photometry as it lies outside range of colors for which transforms are defined
gri_gaia_transform_flags	5	G_GAIA_NONE	g photometry cannot be calculated for this source
gri_gaia_transform_flags	6	R_GAIA_TRANSFORMED	r photometry provided for plate design is transformed from Gaia mags.
gri_gaia_transform_flags	7	R_GAIA_OUTSIDE	r photometry cannot be calculated from Gaia photometry as it lies outside range of colors for which transforms are defined
gri_gaia_transform_flags	8	R_GAIA_NONE	r photometry cannot be calculated for this source
gri_gaia_transform_flags	9	I_GAIA_TRANSFORMED	i photometry provided for plate design is transformed from Gaia mags.
gri_gaia_transform_flags	10	I_GAIA_OUTSIDE	i photometry cannot be calculated from Gaia photometry as it lies outside range of colors for which transforms are defined
gri_gaia_transform_flags	11	I_GAIA_NONE	i photometry cannot be calculated for this source
gri_gaia_transform_flags	12	Z_GAIA_TRANSFORMED	z photometry provided for plate design is transformed from Gaia mags.
gri_gaia_transform_flags	13	Z_GAIA_OUTSIDE	z photometry cannot be calculated from Gaia photometry as it lies outside range of colors for which transforms are defined
gri_gaia_transform_flags	14	Z_GAIA_NONE	z photometry cannot be calculated for this source
gri_gaia_transform_flags	15	GAIA_NEIGHBOR	bright gaia neighbor close to the star
gri_gaia_transform_flags	16	G_PANSTARRS	g photometry provided by PanSTARRS
gri_gaia_transform_flags	17	R_PANSTARRS	r photometry provided by PanSTARRS
gri_gaia_transform_flags	18	I_PANSTARRS	i photometry provided by PanSTARRS
gri_gaia_transform_flags	19	Z_PANSTARRS	z photometry provided by PanSTARRS
gri_gaia_transform_flags	20	POSITION_OFFSET	position shifted with respect to center of star (catalogid corresponds to GAIA id)
zwarning_flags	0	SKY_FIBER	Sky fiber
zwarning_flags	1	LITTLE_WAVELENGTH_COVERAGE	Too little wavelength coverage (WCOVERAGE < 0.18)
zwarning_flags	2	SMALL_DELTA_CHI2	Chi-squared of best fit is too close to that of second best (< 0.01 in reduced chi-squared)
zwarning_flags	3	NEGATIVE_MODEL	Synthetic spectrum is negative (only set for stars and QSOs)
zwarning_flags	4	MANY_OUTLIERS	Fraction of points more than 5 sigma away from best model is too large (> 0.05)
zwarning_flags	5	Z_FIT_LIMIT	Chi-squared minimum at edge of the redshift fitting range (Z_ERR set to -1)
zwarning_flags	6	NEGATIVE_EMISSION	A QSO line exhibits negative emission, triggered only in QSO spectra, if C_IV, C_III, Mg_II, H_beta, or H_alpha has LINEAREA + 3 * LINEAREA_ERR < 0
zwarning_flags	7	UNPLUGGED	The fiber was unplugged or damaged, and the location of any spectrum is unknown
zwarning_flags	8	BAD_TARGET	Catastrophically bad targeting data (e.g. bad astrometry)
zwarning_flags	9	NO_DATA	No data for this fiber, e.g. because spectrograph was broken during this exposure (ivar=0 for all pixels)