================================ zpix-SURVEY-PROGRAM-imaging.fits ================================ :Summary: Legacy Survey imaging photometry columns from the healpix-based redshift catalogs, one file per SURVEY and PROGRAM. :Naming Convention: ``zcatalog/v2/SURVEY/zpix-SURVEY-PROGRAM-imaging.fits``, where ``SURVEY`` is *e.g.* ``main`` or ``sv1`` and ``PROGRAM`` is *e.g.* ``bright`` or ``dark``. :Regex: ``zpix-(cmx|main|sv1|sv2|sv3|special)-(backup|bright|dark|other)-imaging\.fits`` :File Type: FITS, ~200 MB Contents ======== ====== ================ ======== ============================================================ Number EXTNAME Type Contents ====== ================ ======== ============================================================ HDU0_ PRIMARY IMAGE Empty HDU1_ ZCATALOG_IMAGING BINTABLE Legacy Survey imaging photometry columns ====== ================ ======== ============================================================ FITS Header Units ================= HDU0 ---- EXTNAME = PRIMARY Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============ ================ ==== ======================= KEY Example Value Type Comment ============ ================ ==== ======================= CHECKSUM 9aaGCVYE9aaECUYE str HDU checksum DATASUM 0 str data unit checksum ZCATVER v2 str Version of zcatalog files ============ ================ ==== ======================= Empty HDU. HDU1 ---- EXTNAME = ZCATALOG_IMAGING Legacy Survey (`LS`_) imaging photometry columns for each entry in the corresponding :doc:`zpix-SURVEY-PROGRAM.fits <./zpix-SURVEY-PROGRAM>` file. Rows are in the same order and correspond 1-to-1 with the ZCATALOG HDU. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: Required Header Keywords Table .. rst-class:: keywords ============ ================ ==== ======================= KEY Example Value Type Comment ============ ================ ==== ======================= NAXIS1 228 int width of table in bytes NAXIS2 139728 int number of rows in table SURVEY [1]_ main str DESI sub-survey (e.g. sv1, sv3, main) PROGRAM [1]_ dark str DESI program (e.g. dark, bright) CHECKSUM QA6lQ26iQ96iQ96i str HDU checksum DATASUM 4284326946 str data unit checksum ZCATVER v2 str Version of zcatalog files ============ ================ ==== ======================= Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ========================== =========== ============ ===================================================================================================================================== Name Type Units Description ========================== =========== ============ ===================================================================================================================================== TARGETID int64 Unique DESI target ID HEALPIX int32 HEALPixel containing this location at NSIDE=64 in the NESTED scheme PMRA float32 mas yr^-1 Reference catalog proper motion in the RA direction PMDEC float32 mas yr^-1 Reference catalog proper motion in the Dec direction REF_EPOCH float32 yr Reference catalog reference epoch (*e.g.*, 2015.5 for `Gaia`_ DR2) RELEASE int16 Legacy Surveys (`LS`_) `Release`_ BRICKNAME char[8] Brick name from tractor input BRICKID int32 Brick ID from tractor input BRICK_OBJID int32 OBJID (unique to brick, but not to file) MORPHTYPE char[4] `Morphological Model`_ type EBV float32 mag Galactic extinction E(B-V) reddening from SFD98_ FLUX_G float32 nanomaggy `LS`_ flux from tractor input (g) FLUX_R float32 nanomaggy `LS`_ flux from tractor input (r) FLUX_Z float32 nanomaggy `LS`_ flux from tractor input (z) FLUX_W1 float32 nanomaggy WISE flux in W1 FLUX_W2 float32 nanomaggy WISE flux in W2 FLUX_IVAR_G float32 nanomaggy^-2 Inverse Variance of FLUX_G FLUX_IVAR_R float32 nanomaggy^-2 Inverse Variance of FLUX_R FLUX_IVAR_Z float32 nanomaggy^-2 Inverse Variance of FLUX_Z FLUX_IVAR_W1 float32 nanomaggy^-2 Inverse Variance of FLUX_W1 FLUX_IVAR_W2 float32 nanomaggy^-2 Inverse Variance of FLUX_W2 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 indicating that an object touches a pixel in the ``coadd/*/*/*maskbits*`` maps, as cataloged on the `DR9 bitmasks page`_ SERSIC float32 Power-law index for the Sersic profile model (``type="SER"``) SHAPE_R float32 arcsec Half-light radius of galaxy model for galaxy type ``type`` (>0) SHAPE_E1 float32 `Ellipticity component`_ 1 of galaxy model for galaxy type ``type`` SHAPE_E2 float32 `Ellipticity component`_ 2 of galaxy model for galaxy type ``type`` 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 this star: "T2" for `Tycho-2`_, "G2" for `Gaia`_ DR2, "L3" 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 ========================== =========== ============ ===================================================================================================================================== .. [1] Optional .. _`LS`: https://www.legacysurvey.org/ .. _`DR9 bitmasks page`: https://www.legacysurvey.org/dr9/bitmasks .. _`ellipticity component`: https://www.legacysurvey.org/dr9/catalogs/#ellipticities .. _`Release`: https://www.legacysurvey.org/release/ .. _`Morphological Model`: https://www.legacysurvey.org/dr9/catalogs/#goodness-of-fits-and-morphological-type .. _`Tycho-2`: https://heasarc.gsfc.nasa.gov/W3Browse/all/tycho2.html .. _`Gaia`: https://gea.esac.esa.int/archive/documentation//GDR2/Gaia_archive/chap_datamodel/sec_dm_main_tables/ssec_dm_gaia_source.html .. _SFD98: https://ui.adsabs.harvard.edu/abs/1998ApJ...500..525S/abstract .. _SGA: https://www.legacysurvey.org/sga/sga2020