=============== mtl-dark-hp-HPX =============== :Summary: MTL ledgers for the DESI dark-time program (secondary targets). :Naming Convention: ``mtl-dark-hp-HPX.ecsv``, where HPX is the nside=32 (NESTED) HEALPixel integer. :Regex: ``mtl-dark-hp-[0-12287]\.ecsv`` :File Type: ecsv, 0-1 MB Contents ======== ========== ======== ========== EXTNAME Type Contents ========== ======== ========== MTL TABLE MTL Ledger ========== ======== ========== Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ ======== ===================================== ==== ============================================================================ KEY Example Value Type Comment ======== ===================================== ==== ============================================================================ DR 0 int Legacy Surveys Data Release (meaningless for secondary targets) FILEHPX 4447 int HEALPixel integer for the file FILENEST True bool If the HEALPixel NESTED scheme was used for the file (should always be True) FILENSID 32 int HEALPixel nside used for the file (should always be 32) INDIR dr9/1.1.1/targets/main/secondary/dark str Location of the directory of targets used to produce the file OBSCON DARK str DESI program (DARK, BRIGHT or BACKUP) SCND True bool Whether the file is a ledger of primary or secondary targets SURVEY main str DESI survey phase (main, sv2 or sv3) TSFORCED 2021-05-13T08:15:37+00:00 str UTC/ISO TIMESTAMP that was specified to produce initial ledgers ======== ===================================== ==== ============================================================================ Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ============= ======== ====== ================================================= Name Type Units Description ============= ======== ====== ================================================= RA float64 deg Right ascension DEC float64 deg Declination PMRA float32 mas/yr Proper motion in the RA direction PMDEC float32 mas/yr Proper motion in the Dec direction REF_EPOCH float32 yr Reference epoch for Gaia/Tycho astrometry PARALLAX float32 mas Parallax TARGETID int64 Unique DESI targeting ID DESI_TARGET int64 DESI (dark time program) target selection bitmask SCND_TARGET int64 Target selection bitmask for secondary programs SUBPRIORITY float64 Random subpriority [0-1] to break assignment ties OBSCONDITIONS int32 Observing conditions/program bitmask (bright/dark/backup/etc.) PRIORITY_INIT int64 Target's initial priority from target selection bitmasks and OBSCONDITIONS NUMOBS_INIT int64 Target's initial desired number of observations BGS_TARGET int64 BGS (bright time program) target selection bitmask MWS_TARGET int64 MWS (bright time program) target selection bitmask NUMOBS_MORE int64 Desired number of observations given target's current state NUMOBS int64 Number of (good) observations of target acquired so far Z float64 Redshift measured by Redrock ZWARN int64 Redshift warning bitmask measured by Redrock ZTILEID int32 ID of tile that most recently updated target's state Z_QN float64 Redshift measured by QuasarNET IS_QSO_QN int16 Classification determined by QuasarNET (1=QSO) DELTACHI2 float64 Delta-chi-squared for template fit from Redrock TARGET_STATE char[18] Combination of target's class and its current observational state TIMESTAMP char[25] s UTC/ISO time at which the target's state was updated VERSION char[5] Version of desitarget code used to update target's state PRIORITY int64 Target's current priority ============= ======== ====== =================================================