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Using ESO Reflex to access astronomical WebServices

Using ESO Reflex to access astronomical WebServices. by The Sampo Team. In this demo we will show you an example of Web Services used by ESO Reflex . Here you find an ESO Reflex workflow ... and three Web Services: * Sesame Name Resolver * MAST archive

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Using ESO Reflex to access astronomical WebServices

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  1. Using ESO Reflexto access astronomical WebServices byThe Sampo Team Sampo Team Department of Astronomy University of Helsinki,Finland

  2. In this demo we will show you an example of Web Services used by ESO Reflex . Here you find an ESO Reflex workflow ... and three Web Services: * Sesame Name Resolver * MAST archive * WESIX source identification database Let’s move on ... <User> Simbad / NED / VizieR Sesame Name Resolver CDS XML Web Services server Centre de Données astronomiques de Strasbourg The Multimission Archive at STScI (MAST) MAST WESIX Web Enabled Source Identification with X-matching Sampo Team Department of Astronomy University of Helsinki,Finland

  3. User wants to find Hubble information about NGC1365. We have two input parameters. “NGC1365” - The name of the object. “sexconf” – a configuration file for the image analysis package SExtractor run by the WESIX service. <User> Simbad / NED / VizieR Sesame Name Resolver CDS XML Web Services server Centre de Données astronomiques de Strasbourg ”NGC1365” ”sexconf” The Multimission Archive at STScI (MAST) MAST WESIX Web Enabled Source Identification with X-matching Sampo Team Department of Astronomy University of Helsinki,Finland

  4. Let’s send those parameters to appropriate processors. The sesame-processor sends a request to the Sesame name resolver service which in turn is using Simbad, NED and VizieR databases. The idea is to find the location of the requested object NGC1365. Now the sesame processor know the values of the RA & Dec of NGC1365. We split the response using local Java widgets XPath_ra and XPath_dec. The MASTSIAP processor will use those values. <User> ...POS=53.4,-36.14... Simbad / NED / VizieR Sesame Name Resolver CDS XML Web Services server Centre de Données astronomiques de Strasbourg Get info”NGC1365” ”NGC1365” ”sexconf” The Multimission Archive at STScI (MAST) MAST WESIX Web Enabled Source Identification with X-matching Sampo Team Department of Astronomy University of Helsinki,Finland

  5. MASTSIAP is a subworkflow which is using MAST service to get a VOTable of FITS file URLs and other metadata. Let’s make a request using SIAP protocol The VOTable is shown to the user through VOTableviewer processor inside MASTSIAP. At this stage the user has a free choice to select data sets of interest from the list returned from MAST. <User> Simbad / NED / VizieR Sesame Name Resolver POS=53.4,-36.14 The Multimission Archive at STScI (MAST) ra=53.4 dec=-36.14 Simple Image Access Protocol (SIAP) ra=53.4,dec=-36.14? MAST <VOTable> WESIX Web Enabled Source Identification with X-matching Sampo Team Department of Astronomy University of Helsinki,Finland

  6. The WESIX processor save the received catalog to local file … … and send name of the file to Aladin via PLASTIC. Aladin reads the local catalogue file ... ... and makes a new request to the MAST service in order to get the actual FITS image. The combined image and overlayed catalogue is shown in the work space of the Aladin. One more time ... <User> A Plastic Hub is used to transfer the URL of the selected FITS file to the Aladin software using the urlviapalstictoAladin processor. To get a catalog for the selected picture request is send to WESIX service. PLASTIC Hub Simbad / NED / VizieR Sesame Name Resolver CDS XML Web Services server Centre de Données astronomiques de Strasbourg The Multimission Archive at STScI (MAST) MAST url: fits url: fits ”Get catalog for url: fits” FITS for url: fits ”Send url: fits to Aladin” Catalog Catalog for url: fits ”Send <filename> to Aladin” WESIX Web Enabled Source Identification with X-matching ”<filename> from Reflex” Get FITS for url: fits PLASTIC is a protocol for communication between client-side astronomy applications ”url: fits from Reflex” Sampo Team Department of Astronomy University of Helsinki,Finland Jatkuu

  7. Authors Pekka Järveläinen (CSC - Scientific Computing Ltd) Tero Oittinen (Observatory, University of Helsinki) Richard Hook (ST-ECF / ESO) Sami Maisala (Observatory, University of Helsinki) Marko Ullgrén (Observatory, University of Helsinki) Ville Savolainen (CSC - Scientific Computing Ltd) Sampo Team Department of Astronomy University of Helsinki,Finland Jatkuu

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