This page describes the Fuji value-added catalog, which will be publicly
released as part of the DESI Early Data Release (DESI/EDR) in
late-summer 2023.
Please refer to the :ref:`acknowledgments` section for the conditions for using this VAC.
Note
We only document the v2.0 version of this VAC; the v1.0 version is publicly accessible but has been deprecated and is not documented further.
Data from the Fuji VAC can be accessed at any of the following links:
| Data url | https://data.desi.lbl.gov/desi/spectro/fastspecfit/fuji/v2.0 |
| Interactive web-app | https://fastspecfit.desi.lbl.gov |
| NERSC (for collaborators) | /global/cfs/cdirs/desi/spectro/fastspecfit/fuji/v2.0 |
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
| File Name | File Size | Number of Targets |
|---|---|---|
| fastspec-fuji-cmx-other.fits | 11.6 MB | 2,771 |
| fastspec-fuji-special-dark.fits | 145 MB | 35,647 |
| fastspec-fuji-sv1-backup.fits | 15.5 MB | 3,683 |
| fastspec-fuji-sv1-bright.fits | 524 MB | 126,677 |
| fastspec-fuji-sv1-dark.fits | 976 MB | 235,881 |
| fastspec-fuji-sv1-other.fits | 141 MB | 34,150 |
| fastspec-fuji-sv2-backup.fits | 602 KB | 107 |
| fastspec-fuji-sv2-bright.fits | 193 MB | 46,510 |
| fastspec-fuji-sv2-dark.fits | 218 MB | 52,771 |
| fastspec-fuji-sv3-backup.fits | 6.62 MB | 1,564 |
| fastspec-fuji-sv3-bright.fits | 1.08 GB | 265,324 |
| fastspec-fuji-sv3-dark.fits | 2.41 GB | 592,394 |
| fastspec-fuji.fits | 5.7 GB | 1,397,479 |
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-fuji-cmx-other.fits | 2,771 | 56 |
| fastspec-fuji-special-dark.fits | 35,647 | 311 |
| fastspec-fuji-sv1-backup.fits | 3,683 | 100 |
| fastspec-fuji-sv1-bright.fits | 126,677 | 64 |
| fastspec-fuji-sv1-dark.fits | 235,881 | 3,749 |
| fastspec-fuji-sv1-other.fits | 34,150 | 168 |
| fastspec-fuji-sv2-backup.fits | 107 | 0 |
| fastspec-fuji-sv2-bright.fits | 46,510 | 8 |
| fastspec-fuji-sv2-dark.fits | 52,771 | 1,019 |
| fastspec-fuji-sv3-backup.fits | 1,564 | 0 |
| fastspec-fuji-sv3-bright.fits | 265,324 | 132 |
| fastspec-fuji-sv3-dark.fits | 592,394 | 3,397 |
| fastspec-fuji.fits | 1,397,479 | 9,004 |
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].
- The photometry for approximately 1% of targets is not properly propagated into the output metadata table [#121].
- The signal-to-noise ratio of extremely narrow lines can be under-estimated [#124].
- There is an unphysical break in the derived stellar masses [#125].
- The photometry for a small fraction of SV1 targets is incorrect [#129].
To report projects or to request new features please open a ticket.