News and Updates

Catalogue release from the VVV survey: the VVV Infrared Astrometric Catalogue (VIRAC) version 1

Published: 21 Jun 2019

With this data release, the VISTA VVV survey (179.B-2002) publishes the VVV near-infrared Astrometric Catalog (VIRAC) that contains proper motions of stars measured during five years of observations, from 2010 to 2015. The catalogue contains ZYJHKs band merged magnitudes (single epoch, wherein the Ks magnitude is a mean value) and proper motion measurements for 312,587,642 unique sources detected in the multi-epoch imaging campaign covering 560 deg2 of the Milky Way bulge and southern disk. VIRAC includes 119 million high quality proper motion measurements, out of which 47 million have statistical uncertainties below 1 mas yr-1. The VIRAC photometric and astrometric calibrations are both derived from the 2MASS Point Source Catalogue.


New release of imaging and multi-band catalogue data from VST ATLAS Public Survey

Published: 21 May 2019

The ESO Public Survey ATLAS with VST is targeting 4700 square degrees of the southern sky in u,g,r,i,z to depths comparable to those of the Sloan Digital Sky Survey SDSS (r~22). Its wide wavelength coverage, from the u- to z-band complements the VISTA VHS and VIKING Surveys in YJHK bands.


Second data release of the Large Programme 'Dissecting GAs Stripping Phenomena in galaxies (GASP)'

Published: 21 May 2019

This is the second data release from the ESO Large Program 'Dissecting GAs Stripping Phenomena in galaxies' (196.B-0578, PI: B.Poggianti - http://web.oapd.inaf.it/gasp/). It completes the earlier one and provides deep MUSE 3D cubes observed in wide field mode and natural seeing plus ancillary products, comprising the observations taken from P99 to P101.


VO programmatic access to processed data currently on-hold

Published: 20 May 2019

Due to a technical database issue, the publishing of new science processed data via the Virtual Observatory (VO) programmatic interface has been put on-hold.


Calibration issues for the HARPS data products taken between 2019-Feb-02 and 2019-Apr-16

Published: 17 Apr 2019

Due to a bug in the pipeline recipe, all reduced science data taken with the Fabry Perot in the time frame Feb 2nd to April 16th at 13:14 UT exhibit a radial velocity offset, which in the last days amounted to already -13.6 m/s.

We are working in reprocessing the data and make the newly generated versions available via the ESO interfaces.

A new Archive News will inform you when all affected data will have been cured.


New feature of the ESO Archive Science Portal: searching by list of targets

Published: 03 Apr 2019

The Archive Science Portal (ASP) provides the primary entry point for interactive searching and browsing of the ESO Science Archive in terms of processed data sets. So far, the Archive Science Portal supports searching for one target at a time. Because many users requested it, the possibility of searching by a user-provided list of targets has been added. In the first implementation of this feature the list may contain up to 1000 target names or coordinates (J2000 or galactic). The power of the existing graphical user interface remains fully available in the list search mode, including the option of adding and adjusting any of the seventeen non-positional search parameters. The new software release also features a refurbished download menu to accommodate downloading the results of the list search and it includes several bug fixes.


The UVES Spectral Quasar Absorption Database (SQUAD) Data Release 1 (DR1)

Published: 21 Mar 2019

The UVES SQUAD DR1 comprises fully reduced, continuum-fitted high-resolution spectra of quasars with redshifts z = 0–5, with the primary goal of enabling statistical studies of large quasar and absorber samples at high resolution. DR1 includes 467 quasar spectra from the Ultraviolet and Visual Echelle Spectrograph (UVES) on the ESO-VLT. These quasars have at least one exposure in the ESO UVES archive (longer than 100 sec) that was observed before 30th June 2008. All exposures longer than 100 sec observed before 17th November 2016 for these quasars were then included in the final, combined spectra in DR1. In total, 3088 exposures were selected and successfully processed, with a total exposure time of 10 million seconds (2803 hrs; an average of 5.9 hrs per quasar).

The spectra are available from the ESO Science Portal or Programmatically. More details about the release content can be found in the associated Phase 3 data release description. Ancillary data are provided to allow users to reproduce, or improve, the full data reduction, processing and exposure combination to form the final spectra.


Fourth release of UltraVISTA Public Survey data

Published: 18 Mar 2019

UltraVISTA is an ultra-deep near-infrared survey of the central region of the COSMOS field. This fourth UltraVISTA data release 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 4 December 2009 to 29 June 2016, corresponding to 58138 individual images. The total exposure time contributing to this release is 1287.5 hours, and the total survey area is close to 1.9 sq.deg. With respect to DR3, the depth in the ultra-deep stripes has increased somewhat in all five bands (0.1-0.2 mag), while the depth in the deep stripes in Ks has increased by 0.9 mag, making the depth in the Ks stack much more uniform across the full 1.5 deg x 1.2 deg UltraVISTA field. The seeing in the five stacks is in the range 0.74-0.78 arcsec.


New data from the Kilo-Degree Survey: KiDS Data Release 4

Published: 28 Feb 2019

KiDS is one of the ESO Public Surveys carried out with OmegaCAM at the VST. Once complete, it will have observed 1350 square degrees in four filters (u, g, r, i). Born to be a weak lensing shear tomography survey, it will also map the large-scale matter distribution in the universe and constrain the equation of state of Dark Energy. Its secondary science cases include galaxy evolution to Milky Way structure and from the detection of white dwarfs to high-redshift quasars.


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