InteractiveSession < EuroVOAIDA/VOSchool09

EuroVOAIDA/VOSchool09 Web>MultiwavelengthSchool09>InteractiveSession (07 Jul 2009, MarkAllen) (raw view)

*Use Case: Searching for Data available for the bright galaxy M51. (Aladin, SIMBAD, VizieR, Topcat, VOSpec)*

   * Search for images of the bright galaxy M51 in Aladin.
   * Try the various image servers: The Aladin image server, Skyview and Sloan Digitial Sky Survey
   * Try the 'all VO' access (selecting image servers) - Note the method for selecting images at a given sky location. Clicking in the image puts a tick in the selection boxes of the available data.
   * Make a colour composite image using the RGB tool.
   * Use the multi-view windows to manage the various images you have in the 'stack'
   * Try the 'match' button at the bottom of the image window to align the image for synchronized zooming
   * Try the transparency control for viewing images overlaid on each other
   * Overlay as SIMBAD identifications using the SIMBAD link in the Server selector window
   * Check <span style="color: blue; text-decoration: underline">VizieR</span> via Aladin for more detailed catalogues of HII emitting regions in M51. (e.g. <span style="font-family: Times; font-size: medium; -webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; -webkit-text-decorations-in-effect: underline" class="Apple-style-span">Positions and photometry of HII knots in M51 (Calzetti+, 2005))</span>
   * Start Topcat and send tables from Aladin to Topcat (right-click on the plane in the stack, and 'Broadcast selected tables to ...')
   * Note interoperability between Topcat and Aladin, e.g. selecting points in both tools (via position in Aladin, and via any plot window in Topcat)
   * Make a subset of the brightest HII regions, and send the table back to Aladin using the Topcat 'Interop' menu

   * Search for spectra available in the VO with the 'all VO' button in the server selector window.
   * Find spectra available from the ST-ECF Hubble Space Telescope Spectra service, and view the positions of the spectra (and sometimes the spectral slit aperture) on the image. Make a plane containing all the spectra positions, and cross match these with the positions of the HII regions.
   * Start VOSpec ( Web Start: <a href="http://esavo.esac.esa.int/webstart/VOSpec.jnlp" title="http://esavo.esac.esa.int/webstart/VOSpec.jnlp">http://esavo.esac.esa.int/webstart/VOSpec.jnlp</a> ) and display some of the spectra, by clicking on the spectra in the server selector window, and 'Load in -&gt; VOSpec'.

-- Main.MarkAllen - 07 July 2009

Topic revision: r3 - 07 Jul 2009 - MarkAllen

EuroVOAIDA/VOSchool09

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