WELCOME TO THE
ESO ARCHIVE COMMUNITY FORUM


The ESO Archive Community Forum is a platform for sharing ideas and methods, asking questions and sending feedback and suggestions on how to improve and use the new ESO Archive Science Portal and on how to  gain Programmatic and tool access to the archive science portal. 


Contributions from all users are encouraged, also without registration.


To participate in the knowledge exchange, please choose an appropriate Forum from the right panel or from the drop-down menu on the top of this page and write a message. An agent from the ESO Archive Science Group (ASG) will receive, moderated it, and make it public as soon as possible.


Currently, open forums are:

The ESO Archive Community Forum also provides help pages about the data access and retrieval, and about the data types used in the ESO Archive.


Please be aware that the channel to receive help concerning data access, data reduction and pipelines, and quality of products is provided by the ESO helpdesk.

Please observe the usual basic etiquette rule of remain professional, respectful, and courteous at all times.

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High-Resolution MUSE data of the inner region of NGC 7130 released

Archive Science Group 3 weeks ago updated 3 weeks ago 0

The Seyfert starburst galaxy NGC 7130 was targeted for commissioning and science verification of the MUSE Narrow Field Mode, in programmes 60.A-9100(K) and 60.A-9493(A), P.I. Marja Seidel. The reduced data cube provides an angular resolution of 0.17 arcsec across a field of view of 7.5x7.5 arcsec2 covering the spectral range between 4750 and 9300 Å with a resolution of about 2.5 to 2.7 Å. First, the data was processed using the standard ESO pipeline, then individual exposures were selected, manually aligned and combined into the final data cube for a total of 2100 seconds exposure time. This provides an equivalent white-light point source sensitivity of 22.4 mag AB (at 5 sigma). The data with its associated white light image is available from the ESO Science Portal or programmatically.

Details on the observing programme and the data processing can be found in the data release documentation and in the associated publication Comerón et al. (2021, accepted in A&A, arXiv:2011.02937).

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New data release (DR4) from the Gaia-ESO Spectroscopic Public Survey

Archive Science Group 3 weeks ago 0

The new data release from the Gaia-ESO Public Spectroscopic Survey (GES) DR4 delivers about 190,000 stacked, quality-controlled, 1-d spectra (R between 18000 and 54000) of 114,500 unique stellar targets. These stars were observed with GIRAFFE and UVES from 31.12.2011 to 26.01.2018, during the entire time execution of the survey. These targets were selected from all the major structural components of the Milky Way: bulge, thick and thin discs, halo, including open star clusters of all ages and masses. The 1-D spectra from GES DR4 augment or update the spectra published in the previous data releases, which included observations up to July 2014 (~44000 spectra for ~25000 objects).

A catalog of radial velocities is being finalized and will be released in the subsequent data release (DR4.1), together with the 1D stacked spectra for additional ~600 unique targets. The final data release from the Gaia-ESO survey containing the catalog with the measured stellar parameters will be released later in 2021.

The total volume of GES DR4 is 32 GB. These data are available via the Science Portal, and programmatically. More information is available in the accompanying release documentation. Instructions on how to read or display data in the ESO Science Data Products tabular data format can be found in the 1D spectrum data format help page.

Related external resources: Gaia-ESO home page

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Second Data Release from the Galaxy Clusters At Vircam (GCAV) ESO VISTA Public Survey

Archive Science Group 3 weeks ago updated 3 weeks ago 0

Galaxy Clusters At Vircam (GCAV) is a survey (programme 198.A-2008, PI M. Nonino) belonging to the second cycle of ESO VISTA Public Surveys. It is aimed at observing 20 massive galaxy clusters covering in total ~30 deg2 in the infrared Y, J, and Ks bands. Those clusters have also been observed in many ground- and space-based programmes (e.g. CLASH, RELICS, HFF/ BUFFALO). The survey will mainly explore galaxy evolution over a wide, and still largely unexplored, diversity of cluster environments.

This second release adds new data of 15 galaxy clusters to the previous DR1. It contains tile images and related source lists from data collected over the time period from October 2016 to March 2020. The tile images reach a typical sensitivity in AB magnitude of ~23.5 in Y, ~23.4 in J, and ~22.4 in Ks. The total volume of the second data release is 1.3TB.

All data are publicly accessible via the Science Portal or programmatically. More information is available in the accompanying release documentation.

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Second Data Release of the Fornax Deep Survey (FDS)

Archive Science Group 2 months ago 0

FDS

The second data release from the Fornax Deep Survey with VST projects is now available on the ESO archive and it is accessible to the community via the Science Portal, programmatically, and via the Catalogue Query Interface. This data release follows the publication of the refereed paper by Cantiello et al. (2020).

This second release provides ugri-bands photometric and morphological parameters for 1.7 million sources over the ∼21 square degree area of the Fornax Cluster centered on the bright central galaxy NGC 1399. Additionally, photometric and morphological parameters in the gri-bands are provided for 3.1 million sources located on a wider area of ∼27 square degrees which extends to the direction of the galaxy NGC 1316, also in the Fornax cluster.

The catalogues contain sources detected down to a 5-sigma magnitude limits which correspond to 24.1mag, 25.4mag, 24.9mag, 24.0mag in u-, g-, r-, and i-band, respectively (calculated for point sources). The total volume of the released catalogs is 1.2Gb.

The second release also increments the previous image release with ~7.5Gb of images and weight maps for the FDS field n. 8 that have been processed and calibrated by the AstroWISE.

More information about the release content can be found in the accompanying documentation.

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ESO Archive Talks at the 2020 EIROforum Topical Workshop on Big data

Archive Science Group 3 months ago updated 3 months ago 0

BigData

During the 2020 EIROforum Topical Workshop on Big data the ESO Archive Science Group presented the new capabilities of the ESO archive in a contributed talk with title: Mining the Southern Sky via the ESO Archive: Data-streams, cross matching, and forward look. The slides of the presentation will be available online on the conference web-site (search for: Emanuele Paolo Farina), but you will be able to find the presentations in pdf format also here:

Mining the Southern Sky via the ESO Archive: Data-streams, cross matching, and forward look

The ESO Science Archive currently contains (among others product) ~1,700,000 spectra, ~660,000 images, and ~280,000 cubes. Its goal is to preserve and make such multi-wavelength, multi-instrument, and multi-epoch wealth of information discoverable and accessible to any user of the scientific community. Such services are based on a consistent data standard (data format and meta-data content) and on photon provenance tracking. The scientific content of the archive can then be accessed through different interfaces, see for example the interactive interface of the ESO archive science portal.

During the presentation I perform a ``virtual tour'' of the ESO archive, showing examples of data collections and cross utilization. I will also illustrate how the cross-matching of heterogeneous data-stream content (e.g. the ~60,000 recently reprocessed UVES spectra, the ~90,000 newly delivered datacubes from KMOS, and infrared images from the Vista Hemisphere Survey) allows users to validate their data and to open a new multi-band parameter space for discoveries. I will conclude with an outlook on the new challenge for the ESO archive: 4MOST. This new instrument will provide 20,000 new spectroscopic products each night (and related high level physical information), implying that in just one year will double the numbers of archive product collected to date.

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ESO complete in-house re-processing of 20 years of UVES 1D spectra

Archive Science Group 3 months ago 0

UVES

As part of ESO’s efforts to offer science data products to its community via the ESO science archive facility, all the spectroscopic data acquired since the beginning of UVES operations at the VLT from March 2000 to March 2020, i.e. 20 years, have been reprocessed. Whenever possible, 1D spectra have been stacked at the OB level. The master calibrations associated with the science data before March 2015 have been reprocessed for better quality and consistency. Due to this reprocessing, some of the early science products not available before are now provided. All 1D spectra products are available from the ESO archive, have quality control plots and associated 2D extracted spectral images.

The UVES stacked 1D spectra products are built from single exposure 1D spectra, whose scientific quality is similar to that of the UVES products, which were previously available in the data stream. These single exposure 1D spectra products are now served on request as ancillary files.

The UVES reprocessed 1D spectra products can be discovered and downloaded via ASP or programmatically. More details are provided in the accompanying documentation.

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New band-merged source catalog released by the VVV survey

Archive Science Group 3 months ago 0

VVV

A new version of the VVV VISTA Public Survey source catalogue is now available from the ESO Archive. The imaging data in the ZYJHKs bands from which the source catalogue is extracted are acquired under ESO programme 179.B-2002 before the 26th of September 2015.

The source catalogue covers the full area of the VVV survey on the Milky Way bulge and disk. It comprises 348 survey tiles for a total of 540 deg2 where more than 590 million sources are detected. Compared to the previous published versions, this catalogue provides additional data, it includes two separate epochs of contemporaneous JHKs photometry and two separate epochs of contemporaneous ZY photometry.

The VVV images utilized for the source extraction were processed with pipeline version v1.3 or grater by the Cambridge Astronomical Survey Unit (CASU). These higher versions of the pipeline implement significant improvements to the data quality, such as improved photometric calibration procedures and more extensive Quality Control to identify bad data. Source catalogues were then created by the Wide Field Astronomy Unit (WFAU) at the Royal Observatory, Edinburgh.

The catalogue entries can be browsed via the Catalog Query Interface or TAP; the catalogue FITS files can be discovered and downloaded via ASP or programmatically. More details are provided in the accompanying documentation.

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APEX-LABOCA flux map of M83 released

Archive Science Group 3 months ago 0

M83

This new data release includes a flux map at 870 μm for the galaxy M83 (NGC 5236). It is obtained from the combination of the observations taken with the Large APEX Bolometer Camera (LABOCA) under the ESO programme id 081.C-0827(A), PI A. Lundgren, between 2008-06-19 and 2008-06-30.

The total exposure time of the flux map is 0.5 hours, it has a signal to noise ratio of 47 in the galaxy central region, while the inner spiral arms are detected with a signal to noise ratio of more than 3. The atmospheric window of 870 μm, in which LABOCA operates, provides the opportunity to study the dust in the interstellar medium and the grain size distribution.

More information is available in the release documentation. The data can be accessed via the ESO Science Portal or programmatically.

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Joint first and second data releases of the X-SHOOTER Spectral Library (XSL)

Archive Science Group 4 months ago updated 4 months ago 0

The X-SHOOTER Spectral Library project (XSL, http://xsl.u-strasbg.fr/) aims to build a new, moderate-resolution stellar spectral library for use in stellar population modelling. Once completed the XSL will represent a significant improvement on current empirical stellar spectral libraries in terms of stellar parameters and wavelength coverage. The survey was conducted in two phases: a two-semester pilot survey (084.B-0869 and 085.B-0751) followed up by a Large Programme (189.B-0925, PI S.C Trager). The entire survey delivers spectra of a total of nearly 700 unique stars.

The joint science spectra products from the first and second XSL data releases are now available to the community via the ESO archive. The second data release (DR2) contains all the spectra obtained from the six semesters of the ESO Large Programme and consist of three segments that were observed simultaneously (UVB, VIS, NIR). If combined, the 1D spectra products cover the wavelength range between 300 nm and 2.45 μm, at a spectral resolving power close to R = 10 000. The spectra were corrected for instrument transmission and telluric absorption, and they were also corrected for wavelength-dependent flux-losses in 85% of the cases. The final spectra were corrected for radial velocity and are provided in the rest-frame (with wavelengths in air). The DR2 release supersedes the first data release (DR1) from 2014 (initially released via the XSL website only and now also available in the ESO archive as of October 2020), with a larger number of spectra (813 observations of 666 stars) and with a more extended wavelength coverage as the data from the near-infrared arm of the X-SHOOTER spectrograph are now included. The total volume of XSL DR2 is 0.7 GB. In DR1, 246 spectra of 237 unique stars were presented, which were observed during the pilot program, for a wavelength range that was restricted to the two optical arms of X-SHOOTER (300–1024 nm), for a total volume of 140 MB.

More information about the data release contents can be found in the accompanying documentation [PDF DR2, PDF DR1]. The data products are available via the science portal and programmatically [data DR2, data DR1].

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First Data Release of the SINFONI Survey for Unveiling the Physics and the Effect of Radiative feedback (SUPER)

Archive Science Group 4 months ago updated 4 months ago 0

The first data release of the SINFONI Survey for Unveiling the Physics and the Effect of Radiative feedback (SUPER, Circosta et al. 2018; ESO Large Programme 196.A-0377, PI: Mainieri) is now available to the community on ESO Archive via the Science Portal or programmatically

SUPER

This release consists of 20 SINFONI cubes targeting z=2-2.5 Type-1 AGNs in the H (or H+K) band. The adaptive optics module was employed during the IFU observations, abating the effects of atmospheric turbulence down to a superb angular resolution of 0.2 arcsecond (corresponding to ~2 kpc at the AGN redshifts). In combination with the long exposures (of the order of 1-7 hour), the data provides 3D spatially resolved high-quality maps of the Hβ and [OIII] emission lines and of the star emission from the AGN host galaxies.

More information about the release content can be found in the accompanying documentation.

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