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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 Rincon et al. (2025), “DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 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.