.. _loa fastphot vac: Loa fastphot VAC (DR2) ====================== .. contents:: Contents :depth: 3 .. warning:: This VAC has not yet been publicly released. It is currently accessible only to DESI collaboration members via NERSC. Overview -------- This page describes the ``Loa`` fastphot value-added catalog, which contains photometry-only continuum fitting results and will be publicly released as part of `DESI Data Release 2 (DESI/DR2)`_. For the companion full spectrophotometric catalog, see the :ref:`Loa fastspec VAC`. Please refer to the :ref:`acknowledgments` section for the conditions for using this VAC. .. note:: We only document the *latest* version of this VAC here; please see below for information regarding :ref:`previous versions`. Data Content & Access --------------------- Data from the ``Loa`` fastphot VAC can be accessed at any of the following links: ============================ ======================================================== Data url https://data.desi.lbl.gov/desi/vac/dr2/fastphot/loa/v1.0 `NERSC`_ (for collaborators) ``/global/cfs/cdirs/desi/vac/dr2/fastphot/loa/v1.0`` ============================ ======================================================== For more information regarding the content and organization of the VAC, please click on the following links: * :ref:`Healpix Catalogs` * :ref:`Merged Catalogs` * :ref:`Sample Selection` * :ref:`Updated QSO Redshifts` .. _`qso redshifts loa fastphot`: Updated QSO Redshifts --------------------- The QSO redshift corrections applied to this VAC are identical to those used in the :ref:`Loa fastspec VAC`; refer to that page for the algorithm description and per-catalog correction counts. Summary Statistics ------------------ The following tables summarize the size and number of targets in each merged catalog, organized by survey and program. =========================== ========= ================= File Name File Size Number of Targets =========================== ========= ================= fastphot-loa-cmx-other.fits 2.34 MB 2,765 =========================== ========= ================= ============================ ========= ================= File Name File Size Number of Targets ============================ ========= ================= fastphot-loa-sv1-backup.fits 1.04 MB 1,145 fastphot-loa-sv1-bright.fits 106 MB 126,658 fastphot-loa-sv1-dark.fits 198 MB 235,821 fastphot-loa-sv1-other.fits 28.5 MB 34,004 Total (sv1) 334 MB 397,628 ============================ ========= ================= ============================ ========= ================= File Name File Size Number of Targets ============================ ========= ================= fastphot-loa-sv2-backup.fits 132 KB 107 fastphot-loa-sv2-bright.fits 39.3 MB 46,491 fastphot-loa-sv2-dark.fits 44.4 MB 52,693 Total (sv2) 83.8 MB 99,291 ============================ ========= ================= ============================ ========= ================= File Name File Size Number of Targets ============================ ========= ================= fastphot-loa-sv3-backup.fits 1.37 MB 1,573 fastphot-loa-sv3-bright.fits 229 MB 265,307 fastphot-loa-sv3-dark.fits 511 MB 592,128 Total (sv3) 741 MB 859,008 ============================ ========= ================= ================================ ========= ================= File Name File Size Number of Targets ================================ ========= ================= fastphot-loa-special-backup.fits 430 KB 512 fastphot-loa-special-bright.fits 87.7 MB 105,172 fastphot-loa-special-dark.fits 283 MB 261,706 Total (special) 371 MB 367,390 ================================ ========= ================= ========================================= ========= ================= File Name File Size Number of Targets ========================================= ========= ================= fastphot-loa-main-backup.fits 44.5 MB 60,372 fastphot-loa-main-bright-nside1-hp00.fits 247 MB 325,494 fastphot-loa-main-bright-nside1-hp01.fits 2 GB 2,693,426 fastphot-loa-main-bright-nside1-hp02.fits 2.33 GB 3,141,532 fastphot-loa-main-bright-nside1-hp03.fits 487 MB 641,198 fastphot-loa-main-bright-nside1-hp04.fits 1.69 GB 2,285,745 fastphot-loa-main-bright-nside1-hp05.fits 310 MB 408,754 fastphot-loa-main-bright-nside1-hp06.fits 1.75 GB 2,359,953 fastphot-loa-main-bright-nside1-hp07.fits 569 MB 749,725 fastphot-loa-main-bright-nside1-hp08.fits 234 MB 307,648 fastphot-loa-main-bright-nside1-hp09.fits 52.9 MB 69,672 fastphot-loa-main-bright-nside1-hp10.fits 45.9 MB 60,466 fastphot-loa-main-bright-nside1-hp11.fits 108 MB 141,886 fastphot-loa-main-dark-nside1-hp00.fits 645 MB 846,678 fastphot-loa-main-dark-nside1-hp01.fits 2.93 GB 3,937,260 fastphot-loa-main-dark-nside1-hp02.fits 2.78 GB 3,730,928 fastphot-loa-main-dark-nside1-hp03.fits 441 MB 578,709 fastphot-loa-main-dark-nside1-hp04.fits 3.8 GB 5,112,856 fastphot-loa-main-dark-nside1-hp05.fits 659 MB 864,168 fastphot-loa-main-dark-nside1-hp06.fits 4.04 GB 5,426,022 fastphot-loa-main-dark-nside1-hp07.fits 1.2 GB 1,616,210 fastphot-loa-main-dark-nside1-hp08.fits 591 MB 775,136 fastphot-loa-main-dark-nside1-hp09.fits 119 MB 156,454 fastphot-loa-main-dark-nside1-hp10.fits 107 MB 140,162 fastphot-loa-main-dark-nside1-hp11.fits 67.6 MB 88,647 Total (main) 27.1 GB 36,519,101 ========================================= ========= ================= Code & Template Versions ------------------------ The following tables document the code versions and environment variables used to produce this VAC. For details regarding the revision history of ``FastSpecFit``, please see the `change log`_. .. rst-class:: columns ================ ========== Software Package Version(s) ================ ========== python 3.10.14 numpy 1.22.4 scipy 1.8.1 astropy 6.0.1 yaml 6.0.1 matplotlib 3.8.4 fitsio 1.2.1 mpi4py 3.1.6 healpy 1.16.6 desiutil 3.4.3 desispec 0.68.1 desitarget 2.8.0 speclite 0.20 fastspecfit 3.2.0 ================ ========== .. rst-class:: columns ==================== ============================================================ Environment Variable Value ==================== ============================================================ DESI_ROOT /global/cfs/cdirs/desi DUST_DIR /dvs_ro/cfs/cdirs/desi/external/dust/v0_1 FPHOTO_DIR /dvs_ro/cfs/cdirs/desi/external/legacysurvey/dr9 FTEMPLATES_DIR /dvs_ro/cfs/cdirs/desi/public/external/templates/fastspecfit FTEMPLATES_FILE ftemplates-chabrier-2.0.0.fits (see `README.txt`_) ==================== ============================================================ .. _previous versions - loa fastphot: Notes & Known Issues -------------------- v1.0 (latest release) ~~~~~~~~~~~~~~~~~~~~~~ * Release date: 2027 (Exact date TBD) * ``FastSpecFit`` version: ``3.2.0`` * Templates: ``ftemplates-chabrier-2.0.0.fits`` (see `README.txt`_). * Notes: * Initial release of the ``Loa`` fastphot VAC. * Known issues: * None at this time. .. _`DESI Data Release 2 (DESI/DR2)`: https://data.desi.lbl.gov/doc/releases/dr2 .. _`NERSC`: https://nersc.gov .. _`open a ticket`: https://github.com/desihub/fastspecfit/issues .. _`change log`: https://github.com/desihub/fastspecfit/blob/main/doc/changes.rst .. _`README.txt`: https://data.desi.lbl.gov/public/external/templates/fastspecfit/README.txt