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DESIVAST Catalog

Overview

This VAC contains DESI Y1 void catalogs. We include three alternative void catalogs constructed from the algorithms VoidFinder, V2/VIDE, and V2/REVOLVER respectively. The void catalogs are built atop a volume-limmited sample of DESI Year 1 BGS Bright galaxies, extending to a redshift of 0.24. Our catalogs contain roughly 1,000 to 4,000 voids, depending on the algorithm used.

For further details on the catalog construction, see our VAC paper at DESIVAST: A Catalog of Low-Redshift Voids using Data from the DESI DR1 Bright Galaxy Survey

Data Access

Data URL: https://data.desi.lbl.gov/public/dr1/vac/dr1/desivast

NERSC access: 

/global/cfs/cdirs/desi/public/dr1/vac/dr1/desivast

Documentation

A copy of the code used to generate this VAC is stored at https://github.com/hbrincon/DESIVAST/tree/main

Files

VoidFinder catalogs

DESI Year 1 BGS Bright VoidFinder catalogs. The voids are located in the following files, split between the NGC and SGC:

  • DESIVAST_BGS_VOLLIM_VoidFinder_NGC.fits
  • DESIVAST_BGS_VOLLIM_VoidFinder_SGC.fits

The columns in these files are documented at https://vast.readthedocs.io/en/latest/VoidFinder_examples.html#output

In addition to the standard columns included in the VoidFinder algorithm output, we have added the following columns:

  • ‘EFFECTIVE_RADIUS’ : the radius of a sphere with the same volume as each VoidFinder void
  • ‘EFFECTIVE_RADIUS_UNCERT’ : uncertainty in the effective radius calculation

V2/VIDE catalogs

DESI Year 1 BGS Bright VIDE catalogs. The voids are located in the following files, split between the NGC and SGC:

  • DESIVAST_BGS_VOLLIM_V2_VIDE_NGC.fits
  • DESIVAST_BGS_VOLLIM_V2_VIDE_SGC.fits

The columns in these files are documented at https://vast.readthedocs.io/en/latest/Vsquared_examples.html#output

In addition to the standard columns included in the V2 algorithm output, we have added the following columns:

  • ‘EDGE_AREA’ : the void surface area touching the survey edge
  • ‘TOT_AREA’ : the total void surface area

V2/REVOLVER catalogs

DESI Year 1 BGS Bright REVOLVER catalogs. The voids are located in the following files, split between the NGC and SGC:

  • DESIVAST_BGS_VOLLIM_V2_REVOLVER_NGC.fits
  • DESIVAST_BGS_VOLLIM_V2_REVOLVER_SGC.fits

The columns in these files are documented at https://vast.readthedocs.io/en/latest/Vsquared_examples.html#output

In addition to the standard columns included in the V2 algorithm output, we have added the following columns:

  • ‘EDGE_AREA’ : the void surface area touching the survey edge
  • ‘TOT_AREA’ : the total void surface area

Contact

Contact Hernan Rincon for questions about this catalog.