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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 are welcome from the users, also without any need for registration, they are pre-approved, monitored and moderated by the ESO Archive Science Group (ASG).    


If you wish to contribute to the knowledge exchange, please choose a Forum from the right panel or from the drop-down menu on the top of this page and write a message. An agent will receive it and make it public as soon as possible. 

Please be aware that the official help concerning data access, data reduction and pipelines is provided by the ESO User Support Department. 


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

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Second Data Release of the Fornax Deep Survey (FDS)

Archive Science Group 2 weeks 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 4 weeks ago updated 4 weeks 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 1 month 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 2 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 2 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 2 months ago updated 2 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 2 months ago updated 2 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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First Data Release of the Fornax Deep Survey (FDS)

Archive Science Group 3 months ago 0

F11

The first data release of the Fornax Deep Survey with VST (FDS, Venhola et al., 2018, A&A, 620, 165) is now available on the ESO archive.

This consists of 97 high quality images (and of the corresponding weight maps) obtained by stacking u’, g’, r’, and i’-bands data collected with OmegaCAM on the VST from February 2013 to November 2017.

With exposure times ranging from 2 to 12 hours over an area of ~28 square degrees, this survey is a legacy data-set for studies of members of the Fornax Galaxy Cluster and the infalling Fornax A Group down to a surface brightness limit of ~28 mag/arcsec2 (1-sigma surface brightness over a 1 arcsecond2 area) and opens a new parameter regime to investigate the role of the cluster environment in shaping the properties of its galaxy population.

In these release, 181 Gb of (compressed) fits files reduced using the AstroWISE system are present. Catalogues with the complete sample of sources including dwarf galaxies part of the cluster, globular clusters, and background galaxies will be provided in forthcoming releases.

More information about the release content can be found in the accompanying documentation. The products are available via the Science Portal or programmatically.

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New FEROS 1D spectra products published in the ESO Archive

Archive Science Group 3 months ago 0

FEROS

Archive users are informed that the in-house processed 1D spectra products for FEROS are now available for the months July, August, September, and October 2019. A total of 1432 new reduced 1D spectra have been added to the FEROS collection and are now downloadable from the archive science pages or programmatically.

These newly processed science products complement the set of the already available ~60,000 1D spectra for FEROS. This service is now resumed following the suspension in February 2020.

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Second data release of the Next Generation Transit Survey

Archive Science Group 4 months ago updated 4 months ago 0

NGTS

The Next Generation Transit Survey (NGTS) is a ground based exoplanet survey designed to detect Neptune and super-Earth sized planets orbiting around bright stars, using the transit method. The NGTS facility consists of 12 fully-robotic 20 cm f/2.8 telescopes located at the ESO site on Paranal, Chile. Each telescope has a 2.8x2.8 deg2 field of view and is equipped with a custom filter with a bandpass of 520-890nm, which increases sensitivity to late-K and early-M stars.

This second data release (DR2) includes 72 separate fields that have been completed from the start of commissioning in September 2015, till April 2018. The data of the 24 fields already provided within DR1 have been reprocessed with an improved version of the reduction pipeline. A source catalogue down to 16th magnitude is provided, together with the light curves obtained with aperture photometry in addition to the reduced, astrometrically calibrated, stacked dithered images. More than six hundred thousand sources were monitored with a 13 second cadence, collecting almost 110 billion photometric measurements in total. The overall data volume is about 4 Terabytes.

All data are publicly accessible from the Science Portal or programmatically in a file-by-file fashion. Per-source data access is provided by the Catalogue Facility or via TAP. Detailed information is available in the accompanying release documentation.

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