1 / 12

3D Spectroscopy in the Virtual Observatory: Current Status

Spectroscopy and VO – ESAC – Villafranca del Castillo – 22 Mar 2007. 3D Spectroscopy in the Virtual Observatory: Current Status. Igor Chilingarian (Observatoire de Paris, France/SAI MSU, Russia) Ivan Zolotukhin (SAI MSU, Russia)

tanner
Download Presentation

3D Spectroscopy in the Virtual Observatory: Current Status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spectroscopy and VO – ESAC – Villafranca del Castillo – 22 Mar 2007 3D Spectroscopy in the Virtual Observatory:Current Status Igor Chilingarian (Observatoire de Paris, France/SAI MSU, Russia) Ivan Zolotukhin (SAI MSU, Russia) Francois Bonnarel, Mireille Louys, Pierre Fernique, Thomas Boch (CDS, France) Pierre Le Sidaner, Frederic Royer, Isabelle Jegouzo (Observatoire de Paris)

  2. 3 Cornerstones for 3D data in VO 1. Data Model 2. Data Access Services 3. Client Applications

  3. Characterisation DM The basic part of the most general data model: Observation DM Provides a physical characterisation of a dataset

  4. CharacterizationAxis[ucd=pos]/Coverage/Location CharacterizationAxis[ucd=pos]/Resolution/RefVal CharacterizationAxis[…]/SamplingPrecision/RefVal CharacterizationAxis[ucd=pos]/Coverage/Bounds/CharBox Characterising IFU datasets Only first two levels (Location/Ref.Value and Bounds) should be provided for the whole dataset

  5. 3 Cornerstones for 3D data in VO 1. Data Model 2. Data Access Services 3. Client Applications

  6. Storing 3D Data in FITS • Pure 3D data cube (for IFP data and for some IFU) • 2D-image (one spectrum per row) + binary table  Euro3D Format • Euro3D Format • FITS binary data table: one row per spectrum • Binary table describing shape of spatial elements (“spaxels”) • Some mandatory metadata, including: common spectral WCS for all spectra, common spatial WCS for all spatial elements, meteo parameters during the observations, etc.

  7. 1. Giraffe Archive at ObsPM • Delivery of Euro3D FITS format and “stacked spectra” for reduced observations made with FLAMES/Giraffe at ESO VLT in MEDUSA mode (multi-object spectroscopy) (see poster by Royer et al.) • SSAP access to spectra individual objects (extracted fibers) • More data (IFU/ARGUS) are coming…

  8. 2. ASPID-SR at SAO RAS • Direct querying of the Characterisation DM metadata stored in PostgreSQL database with native XML support using SQL+XPath (see poster by Louys et al.) • SSAP interface on top of it • Delivery of Euro3D FITS + 3D FITS cubes for ~600 datasets including ~100 MPFS IFU datasets, ~70 IFP data cubes, long slit spectra (the rest) • WEB-2.0 interface • Highest possible integration of the archive WEB-site with existing VO client applications

  9. 3 Cornerstones for 3D data in VO 1. Data Model 2. Data Access Services 3. Client Applications

  10. VO-Paris Euro3D Client • Open source tool, Java 5+ • Available as applet and Java WebStart • I/O of Euro3D FITS files (local or URL) • Extraction of spectra for individual fibers • Export of extracted spectra in the VOTable serialization of the IVOA Spectral DM 1.0 • Export of the catalogue of fiber positions as VOTable 1.1 • Communication with CDS Aladin and ESA VOSpec using PLASTIC messages for data visualisation http://vo.obspm.fr/tools/Euro3D/

  11. Summary Our implementation is yet rather simple, however it demonstrates how existing VO standards and tools can be integrated to provide access to complex datasets

  12. PLASTIC-aware ASPIDApplet Load DSS Image Load Euro3D File Extract & Display Spectrum Show Fiber Positions Select Fiber(s) How this all works… (ASPID-SR) PLASTIC hub

More Related