News and Updates

Release of the MUSE gAlaxy Groups In COSMOS (MAGIC) survey datacubes

Published: 22 Apr 2024

The release of the MUSE gAlaxy Groups In COSMOS (MAGIC) survey (Programs 094.A-0247, 095.A-0118, 096.A-0596, 097.A-0254, 098.A-0017, 099.A-0246, 0100.A-0607, 0101.A-0282, 0102.A-0327, 0103.A-0563, PI T. Contini) is composed of 18 datacubes, observed with exposure times from 1 to 10 hours, with a median of 4.3 hours, using the wide-field mode, with a spectral sampling of 1.25 Angstroms and a spatial sampling of 0.2 arcsecond. The datacubes cover the wavelength range between 4700 and 9350 Angstroms and have an image quality better than 0.7’’ FWHM owing to good observing conditions and/or to the use of adaptive optics. The median 3σ point-source flux limit of an unresolved emission line reaches 3.6x10-19 erg s-1 cm-2 and the median point source magnitude limit is about 28.5 at 5σ in white-light images. The MAGIC survey datacubes target 15 known massive groups and clusters at intermediate redshift (0.3 < z < 0.8), 14 of which being located in the COSMOS field and one in the VVDS field. This dataset is incredibly rich and contains more than one thousand of objects, from stars to high redshift galaxies, as well as extended nebulae.

ERIS release of pipeline processed imaging and IFU products

Published: 15 Apr 2024

Release of pipeline processed imaging and IFU products from ERIS 

The two newly available data collections, ERIS-NIX and ERIS-SPIFFIER, provide access to reduced scientific imaging products and 3D data cubes, respectively. Data of both collections are obtained with ERIS, the Enhanced Resolution Imager and Spectrograph, a general-use infrared integral field spectrograph and imager that utilises the adaptive optics on the VLT’s UT4.

ERIS-NIX:  The imager operates in the near-infrared range of 1 – 5 μm (J to Mp bands) and is designed to provide diffraction limited imaging.  The focus of this release is dedicated to the fully reduced products from the ERIS/NIX imager with the 13 or 27mas/pixel cameras (field-of-view of 27”x27” and 55”x55”). The other modes and data formats offered by NIX, coronagraphy, very short exposure “burst” mode cubes, and long-slit spectroscopy are currently not included in this release, but may be added at a later date. 

First data release of HARPS Radial Velocity catalog

Published: 12 Dec 2023

The first public data release of the HARPS Radial Velocities Catalog contains measurements obtained from 2003 to 2023 with the High Accuracy Radial Velocity Planet Searcher (HARPS) spectrograph installed at the ESO 3.6m telescope in La Silla Observatory (Chile).

Second data release from the VISTA second cycle Public Survey VEILS

Published: 30 Nov 2023

The VISTA Extragalactic Infrared Legacy Survey (VEILS, PI: Banerji, Program ID:198.A-2005) is a deep J and Ks-band transient and wide-field survey being conducted using the VIRCAM camera with the primary goals of understanding the epoch of reionisation, the build-up of massive galaxies, and constraining the cosmological equation of state using both Type 1a supernovae and AGN dust lag measurements. The total VEILS surveyed area is 9 sq-deg of the extragalactic sky over three fields: XMM-LSS, CDFS and ELAIS-S1. The data acquisition for the VEILS survey was successfully completed in 2022 prior to the VIRCAM decommissioning.

Third and final release of the programme Investigating Stellar Population In RElics (INSPIRE)

Published: 14 Nov 2023

The scientific objective of the XShooter ESO Large Program 1104.B-0370 INSPIRE (PI: C. Spiniello, 2021A&A...646A..28S), is to create the first catalogue of spectroscopically confirmed relics in the redshift range 0.1<z<0.5, which bridges the gap between the three local confirmed relics and the high-z red nuggets galaxies. The availability of this sample of objects enables to put stringent constraint on the predictions from simulations on the initial intense phase of star formation in passive galaxies.

First release of X-shooter spectra from the young stellar objects observed under the PENELLOPE LP

Published: 25 Oct 2023

The PENELLOPE Large Programme (Prog ID 106.20Z8) is a multi-instrument spectroscopic survey aimed at obtaining complementary data to the targets of the ULLYSES program. The latter is a Hubble Space Telescope (HST) Director’s Discretionary Time that was executed in a three-year period, from HST Cycle 27 through Cycle 29 (2020-2022).

First Data Release of ePESSTO+, the advanced Public ESO Spectroscopic Survey of Transient Objects

Published: 18 Aug 2023

ePESSTO+ the advanced Public ESO Spectroscopic Survey of Transient Objects (PI: Inserra, ESO program IDs 1103.D-0328 and 106.216C) started in April 2019 and it is currently ongoing at the New Technology Telescope using the instruments EFOSC2 and SOFI. It is the second extension of the PESSTO survey (PI: Smartt).

ePESSTO+ targets supernovae and optical transients brighter than 20 mag for classification and selected science targets for detailed follow-up. It uses standard EFOSC2 setups with resolutions of 13-17Å between 3680-10320Å, SOFI spectroscopy for brighter science targets, with the blue and red (rarely) grisms (resolutions 23Å - 33Å), and SOFI imaging with broadband JHKs filters.

This first release includes spectra and images collected in the first 2.5 years of ePESSTO+ operations, from April 2019 to October 2021.

In this period spectra were taken for a total of 2138 objects; from that set, 178 ePESSTO+ Key Science targets were identified and followed-up for time series of EFOSC2 optical spectra, with the brighest also having SOFI spectra: 154 supernovae, 1 supernova imposter, 15 tidal disruption events (one of which is represented in the figure below), 2 LBV, 2 AGN, 4 supernova light echoes.

The higher resolution EFOSC grsims Gr#18 and Gr#20 were employed occasionally to allow higher spectral resolution for objects with H-Balmer lines in emission.

In total this release contains 14 GB of data: 2157 EFOSC2 spectra, 18 SOFI spectra, 480 SOFI images. The data products are available from the ESO Archive Science Portal or the Programmatic Access services, under the collection name ePESSTOplus, though the official name remains ePESSTO+.

More details about the release content can be found in the associated data release description.

The DOI assigned to the ePESSTO+ data collection is

Final data release (5.1) of the Gaia-ESO public spectroscopic survey

Published: 05 Jul 2023

Utilizing the UVES and GIRAFFE instruments, this comprehensive survey has encompassed all major components of the Milky Way, systematically studying 114,916 stars. The observed robust samples have enabled detailed observations of bulge, thick and thin disks, halo components, and open star clusters of various ages and Galactocentric distances.

Fifth release of UltraVISTA Public Survey data

Published: 05 May 2023

UltraVISTA is an ultra-deep near-infrared survey of the central region of the COSMOS field. The fifth 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 December 2009 to mid 2019, corresponding to 81125 individual images. This is three years more than DR4. The additional data have almost homogenised the exposure time in the “deep” and “ultra-deep” stripes in the J, H and Ks filters, which now reach the same depths to ∼0.15 mag.

Data Release of the MUSE Hubble Ultra-Deep Field surveys (AMUSED) mosaic cubes and catalogue

Published: 12 Apr 2023

The release of the MUSE Hubble Ultra-Deep Field survey (Programmes 094.A-0289(B), 095.A-0010(A), 096.A-0045(A), 096.A-0045(B) and 1101.A-0127, PI R. Bacon) includes the deepest spectroscopic survey ever performed. The MUSE mosaic data cubes, with their 3D content, amazing depth, wide spectral range, and excellent spatial and medium spectral resolution, are rich in information. The 3σ point-source flux limit of an unresolved emission line reaches 3.1×10-19 and 6.3×10-20 erg s-1 cm-2 at 10- and 141-hour depths, respectively. The redshifts of 2221 sources have securely been identified and measured. With the exception of eight stars, the collected sample consists of 25 nearby galaxies (z < 0.25), 677 [O ii] emitters (z = 0.25 - 1.5), 201 galaxies in the MUSE redshift desert range (z = 1.5 - 2.8) and 1308 Lyα emitters (z = 2.8 - 6.7). This represents an order of magnitude more than the collection of all spectroscopic redshifts obtained before MUSE in the Hubble ultra-deep field area (i.e., 2221 versus 292). At high redshift (z > 3), the difference is even more striking, with a factor of 65 increase (1308 versus 20).

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