Sixth and last release of UltraVISTA Public Survey data

Published: 02 Jul 2024

UltraVISTA is an ultra-deep near-infrared survey of the central region of the COSMOS field. A recent overview of UltraVISTA can be found in this presentation. The sixth and last UltraVISTA data release, “DR6” or “Legacy”, comprises stacked images in YJHKs and NB118 narrow-band filters, as well as single-band and dual-mode source lists. The data release also contains a five-band merged catalogue, created from the individual Ks-selected source lists. The release is based on the observations carried out from December 2009 to March 2023, corresponding to 99,845 individual images. The observations obtained since the DR5 release are mostly in the Y-band “deep” stripes in order to bring them to the same depth as the previously observed “ultra-deep” stripes. Thus, in this release, the depth is nearly uniform over the full field for the broad-band YJHKs filters. This release also uses GTO data obtained in 2010 in the J and the NB118 filters in the “deep” stripes.

The total exposure time contributing to this release is 2290 hours, and the total survey area is close to 1.9 square degrees. The seeing in the five stacks is ~0.75". The data volume is ∼90 GB.

The data products are available from the ESO Archive Science Portal or the Programmatic Access service. More details about the release content can be found in the associated data release description. Moreover the band-merged catalogue data, containing 491801 records, can be queried programmatically or via the dedicated Catalogue Interface.

By accessing the UltraVISTA DR6, the ESO community benefits from joint efforts by ESO, the Principal Investigators of the VISTA public survey projects and their collaborators, including the CANDIDE data centre at the IAP (France) and CASU (UK).The DOI assigned to the data collection is 10.18727/archive/52.