AAS Journals
Published July 11, 2025 | Version v1
Dataset Restricted

UNIONS-VLASS Radio Galaxy Catalog

Creators

  • 1. ROR icon Waseda University
  • 2. ROR icon Ruhr University Bochum
  • 3. ROR icon Herzberg Institute of Astrophysics
  • 4. CEA Saclay

Contributors

Contact person:

Description

The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) - Very Large Array Sky Survey (VLASS) radio galaxy catalog

Datasets included:

UNIONS

 CFHT:u + r; Subaru: g + z; Pan-STARRS: i https://www.skysurvey.cc/

VLASS Epoch 2

 VLA, 3 GHz https://cirada.ca/vlasscatalogueql0

FIRST

 VLA, 1.4 GHz https://sundog.stsci.edu/

LoTSS DR2

 LoFAR, 144 MHz https://lofar-surveys.org/dr2_release.html

SDSS DR16

 ugriz https://www.sdss4.org/dr16/

Pan-STARRS

 grizy https://outerspace.stsci.edu/display/PANSTARRS/
AllWISE 3.4, 4.6, 12, and 22 micron https://wise2.ipac.caltech.edu/docs/release/allwise/
unWISE 3.4 and 4.6 micron https://unwise.me/

Supplemented columns:

sep_{survey1}_{survey2}

 arcsec angular separations of each pair of radio surveys and UNIONS
alpha_{survey1}_{survey2}   spectral index and the corresponding errors of each pair of radio surveys
r_obs   observed radio loudness
luminosity_{frequency} W/Hz radio spectral luminosity at a certain frequency
mag_{survey} mag radio AB magnitudes [mag] for VLASS and FIRST
ls_{survey} kpc projected linear size [kpc] of VLASS and LoTSS
flag_z_photo   reliability of UNIONS photo-z
Z_B_ref   preferred UNIONS redshifts
Z_ref   preferred redshifts
extended   flag of an extended radio source
flag_multi_opt   flag of multiple optical counterparts

The calculations and details of these columns are described in Table 3 in Zhong et al. (2025, accepted for publication in ApJS; https://arxiv.org/abs/2507.08604).

Files

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Additional details

Related works

Is supplement to
Preprint: arXiv:2507.08604 (arXiv)

Dates

Submitted
2025-07
Ver. 2025.07.11