This page describes the Iron value-added catalog, which will be publicly
released as part of the DESI Data Release 1 (DESI/DR1) sometime in 2024
(exact date TBD).
Please refer to the :ref:`acknowledgments` section for the conditions for using this VAC.
Data from the Iron VAC can be accessed at any of the following links:
| Data url | https://data.desi.lbl.gov/public/dr1/vac/dr1/fastspecfit/iron/v1.0 |
| NERSC (for collaborators) | /global/cfs/cdirs/desi/public/dr1/vac/dr1/fastspecfit/iron/v1.0 |
For more information regarding the content and organization of the VAC, please click on the following links:
- :ref:`Healpix Catalogs<healpix catalogs>`
- :ref:`Merged Catalogs<merged catalogs>`
- :ref:`Sample Selection<sample selection>`
- :ref:`Updated QSO Redshifts<qso redshifts>`
The following table summarizes the size and number of targets in each merged catalog.
Note
The last catalog listed in the table is a super-merge of all the preceding catalogs, i.e., a merge over all surveys and programs.
.. rst-class:: columns
| fastspec-iron-cmx-other.fits | 11.5 MB | 2,761 |
| fastspec-iron-main-backup.fits | 61.3 MB | 15,163 |
| fastspec-iron-main-bright.fits | 25.5 GB | 6,445,915 |
| fastspec-iron-main-dark.fits | 39.9 GB | 10,074,406 |
| fastspec-iron-special-backup.fits | 2.38 MB | 552 |
| fastspec-iron-special-bright.fits | 175 MB | 43,261 |
| fastspec-iron-special-dark.fits | 60.5 MB | 14,953 |
| fastspec-iron-special-other.fits | 172 MB | 42,064 |
| fastspec-iron-sv1-backup.fits | 14 MB | 3,331 |
| fastspec-iron-sv1-bright.fits | 524 MB | 126,649 |
| fastspec-iron-sv1-dark.fits | 965 MB | 233,158 |
| fastspec-iron-sv1-other.fits | 141 MB | 34,112 |
| fastspec-iron-sv2-backup.fits | 593 KB | 105 |
| fastspec-iron-sv2-bright.fits | 193 MB | 46,486 |
| fastspec-iron-sv2-dark.fits | 218 MB | 52,682 |
| fastspec-iron-sv3-backup.fits | 6.45 MB | 1,524 |
| fastspec-iron-sv3-bright.fits | 1.08 GB | 265,291 |
| fastspec-iron-sv3-dark.fits | 2.4 GB | 592,165 |
| fastspec-iron.fits | 73.4 GB | 17,994,578 |
The following table summarizes the number of QSO targets whose redshift has been updated using the procedure documented :ref:`here<qso redshifts>`.
.. rst-class:: columns
| Catalog | Number of Targets | Number with Corrected Redshifts |
|---|---|---|
| fastspec-iron-cmx-other.fits | 2,771 | 63 |
| fastspec-iron-special-dark.fits | 35,647 | 389 |
| fastspec-iron-sv1-backup.fits | 3,683 | 119 |
| fastspec-iron-sv1-bright.fits | 126,677 | 402 |
| fastspec-iron-sv1-dark.fits | 235,881 | 4,656 |
| fastspec-iron-sv1-other.fits | 34,150 | 372 |
| fastspec-iron-sv2-backup.fits | 107 | 0 |
| fastspec-iron-sv2-bright.fits | 46,510 | 151 |
| fastspec-iron-sv2-dark.fits | 52,771 | 1,185 |
| fastspec-iron-sv3-backup.fits | 1,564 | 32 |
| fastspec-iron-sv3-bright.fits | 265,324 | 649 |
| fastspec-iron-sv3-dark.fits | 592,394 | 5,973 |
| fastspec-iron.fits | 1,397,479 | 13,991 |
This section documents any issues or problems which were identified with the VAC after its final release.
- The tied amplitudes of [OII]7320,7330 doublet were reversed in the line fitting [#119].
To report projects or to request new features please open a ticket.