VLASS Data

VLASS Data and Data Products

Tile definition and observing status

VLASS observations are broken into tiles 10x4 deg2 in size. The areas covered by each tile, and their observing status in each epoch are listed on this page.

Data Products Description:

New! The VLASS Data Products are now described in a SPIE Conference Paper by A. Kimball et al. (2026) "The Karl G. Jansky Very Large Array Sky Survey (VLASS). Data Products"

This can be used as a reference / citation for VLASS data products.

Basic Data Products

The set of survey products produced by NRAO, including links to the archive where they are stored.

Enhanced Data Products

Additional high-level products from external groups.

Calibration and imaging weblogs

When the pipeline runs, it produces a log as a set of webpages, the weblog. This link takes you to the NRAO archive directory where the weblogs are stored.

Interactive HiPS Images

The Hierarchical Progressive Surveys (HiPS) standard allows interactive viewing of large datasets such as sky surveys. We have created HiPS visualizations of the sky survey using the Quick Look images and the Aladin Lite viewer. The individual epoch HiPS contain the the full FITS representations.

Here is the current HiPS Aladin Lite interactive image for all current VLASS Epochs plus key other surveys (click radio button to toggle). This just links to the individual HiPS data for each survey and epoch (does not contain FITS images). Also, here is the Early Release Single Epoch HiPS containing the ~1000 square degrees from VLASS2.1.

 

Connect with NRAO

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Founded in 1956, the NSF NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NSF NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NSF NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NSF NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

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