|
| 1 | +============================ |
| 2 | +DATA clustering catalogs |
| 3 | +============================ |
| 4 | + |
| 5 | +:Summary: For each target type, LSS catalogs for the data, ready to be used for clustering measurements, are provided. |
| 6 | +:Naming Convention: ``{TARGET}_{GALCAP}_clustering.dat.fits``, where ``{TARGET}`` is the target: ``QSO``, ``ELG``, ``ELG_LOPnotqso``, ``LRG``, ``LRG+ELG_LOPnotqso``, |
| 7 | + for dark or ``BGS_ANY``, ``BGS_BRIGHT``, ``BGS_BRIGHT-21.5`` for bright. ``{GALCAP}`` is the Galactic hemisphere region ``NGC`` or ``SGC`` or the combination of both if not explicitly shown. |
| 8 | +:Regex: ``[A-Za-z0-9._+-]+_(NGC|SGC)_clustering\.dat\.fits`` |
| 9 | +:File Type: FITS, 237 MB |
| 10 | + |
| 11 | +Contents |
| 12 | +======== |
| 13 | + |
| 14 | +====== ======= ======== =================== |
| 15 | +Number EXTNAME Type Contents |
| 16 | +====== ======= ======== =================== |
| 17 | +HDU0_ IMAGE Empty |
| 18 | +HDU1_ LSS BINTABLE Catalog data |
| 19 | +====== ======= ======== =================== |
| 20 | + |
| 21 | + |
| 22 | +FITS Header Units |
| 23 | +================= |
| 24 | + |
| 25 | +HDU0 |
| 26 | +---- |
| 27 | + |
| 28 | +This HDU has no non-standard required keywords. |
| 29 | + |
| 30 | +Empty HDU. |
| 31 | + |
| 32 | +HDU1 |
| 33 | +---- |
| 34 | + |
| 35 | +EXTNAME = LSS |
| 36 | + |
| 37 | +LSS catalogs for clustering measurements |
| 38 | + |
| 39 | +Required Header Keywords |
| 40 | +~~~~~~~~~~~~~~~~~~~~~~~~ |
| 41 | + |
| 42 | +.. collapse:: Required Header Keywords Table |
| 43 | + |
| 44 | + .. rst-class:: keywords |
| 45 | + |
| 46 | + ====== ============= ==== ======================= |
| 47 | + KEY Example Value Type Comment |
| 48 | + ====== ============= ==== ======================= |
| 49 | + NAXIS1 137 int width of table in bytes |
| 50 | + NAXIS2 1821322 int number of rows in table |
| 51 | + DESIDR dr1 str DESI Data Release |
| 52 | + ====== ============= ==== ======================= |
| 53 | + |
| 54 | +Required Data Table Columns |
| 55 | +~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 56 | + |
| 57 | +.. rst-class:: columns |
| 58 | + |
| 59 | +==================== ======== ========= ===================================================================================================================== |
| 60 | +Name Type Units Description |
| 61 | +==================== ======== ========= ===================================================================================================================== |
| 62 | +TARGETID int64 Unique DESI target ID |
| 63 | +Z float64 Redshift measured by Redrock |
| 64 | +NTILE int64 Number of tiles target was available on |
| 65 | +RA float64 deg Barycentric Right Ascension in ICRS |
| 66 | +DEC float64 deg Barycentric declination in ICRS |
| 67 | +PHOTSYS char[1] N for the MzLS/BASS photometric system, S for DECaLS |
| 68 | +FRAC_TLOBS_TILES float64 Fraction of targets with the same TILES value that contribute to FRACZ_TILELOCID |
| 69 | +WEIGHT_ZFAIL float64 Should be all 1 at this point for main survey |
| 70 | +WEIGHT_RF [1]_ float64 Imaging systematics weights derived with the regressis random forest regression method |
| 71 | +WEIGHT_SN [1]_ float64 Imaging systematics weights derived with the sysnet NN regression method |
| 72 | +WEIGHT_SYS float64 Correction for fluctuations in projected density with imaging conditions, from random forrest method |
| 73 | +WEIGHT float64 The combination of all weights to use |
| 74 | +WEIGHT_COMP float64 Completeness weight accounting for the local chance of being assigned a fiber |
| 75 | +NX float64 Estimated mean number density given the redshift and number of overlapping tiles (NTILE) |
| 76 | +WEIGHT_FKP float64 1/(1+NX*P0), with P0 different for each tracer |
| 77 | +WEIGHT_RESCALED [1]_ float64 Rescaled weight when unifying different targets into a single frame |
| 78 | +EFFECTIVE_BIAS [1]_ float64 Effective bias used to weight the galaxy when unifying several tracers |
| 79 | +flux_g_dered [1]_ float32 nanomaggy (lower or uppercase) Flux in the g-band after correcting for Galactic extinction (AB system) |
| 80 | +flux_r_dered [1]_ float32 nanomaggy (lower or uppercase) Flux in the r-band after correcting for Galactic extinction (AB system) |
| 81 | +flux_z_dered [1]_ float32 nanomaggy (lower or uppercase) Flux in the z-band after correcting for Galactic extinction (AB system) |
| 82 | +flux_w1_dered [1]_ float32 nanomaggy (lower or uppercase) Flux in the WISE W1-band after correcting for Galactic extinction (AB system) |
| 83 | +flux_w2_dered [1]_ float32 nanomaggy (lower or uppercase) Flux in the WISE W2-band after correcting for Galactic extinction (AB system) |
| 84 | +==================== ======== ========= ===================================================================================================================== |
| 85 | + |
| 86 | +.. [1] Optional |
| 87 | +
|
| 88 | +Notes and Examples |
| 89 | +================== |
| 90 | + |
| 91 | +Optional columns: |
| 92 | + |
| 93 | +* ``WEIGHT_RESCALED`` and ``EFFECTIVE_BIAS`` only when unifying targets into a single frame (*e.g.*: LRG+ELG_LOPnotqso) |
| 94 | +* ``flux_g_dered``, ``flux_r_dered``, ``flux_z_dered``, ``flux_w1_dered``, ``flux_w2_dered`` only present in BGS samples |
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