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Demonstration of VO Tools and Technology

Demonstration of VO Tools and Technology. Tamás Budavári Johns Hopkins University. Direct access to Images Spectra Catalogs Higher level Cross match etc. VO Tools. Build JPEG mosaics For given (RA, Dec) Arbitrary zoom levels Overplot catalog data Overplot geometry

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Demonstration of VO Tools and Technology

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  1. Demonstration of VO Tools and Technology Tamás Budavári Johns Hopkins University

  2. Direct access to Images Spectra Catalogs Higher level Cross match etc. VO Tools NVO Summer School, Aspen 2004

  3. NVO Summer School, Aspen 2004

  4. NVO Summer School, Aspen 2004

  5. NVO Summer School, Aspen 2004

  6. NVO Summer School, Aspen 2004

  7. Build JPEG mosaics For given (RA, Dec) Arbitrary zoom levels Overplot catalog data Overplot geometry MapQuest like navigation List of objects Web services JPEG returned in DIMEor byte array in XML SDSS Image Cutout Kudos to Maria Nieto-Santisteban NVO Summer School, Aspen 2004

  8. NVO Summer School, Aspen 2004

  9. Public repository 500,000 spectra (2B row) Spatial search and more Register & submit yours Web site On-the-fly plotting Building composites Web services More options and tools Spectrum Services Kudos to László Dobos NVO Summer School, Aspen 2004

  10. Public repository Search by keyword or eff Extract in various formats Register & submit yours Web site On-the-fly plotting Easy access to all Web services To code against Bandpass Services NVO Summer School, Aspen 2004

  11. NVO Summer School, Aspen 2004

  12. U wanna talk database? Structured Query Languageor SQL for short (standard) Simple syntax SELECT<columns>FROM<table>WHERE<conditions> For example: select ra, dec from galaxy where r<19 What else do we need? To specify area on sky Could be very complicated Standard interface to DBs XML Web Services for interop Tools to federate archives Dynamically for flexibility Catalog Access   Astronomical Data Query Language NVO Summer School, Aspen 2004

  13. SkyNode interface to archives Implements ADQL returns VOTable Basic node understands “REGION” Full node understands “XMATCH” SkyQuery portal Knows the SkyNodes from Registry Understands federated query http://openskyquery.net Open SkyQuery NVO Summer School, Aspen 2004

  14. Direct access to Images Spectra Catalogs Higher level Cross match etc. Summary Your project here NVO Summer School, Aspen 2004

  15. Project Ideas • Average QSO spectrum? • Composite spectrum of the 20 most distant SDSS quasars? • Average spectrum as a function of redshift? • Try a few redshift bins by hand this afternoon (pick ~10-20 objects for each bin) • Write code to analyze many more redshift bins (flat z histogram inside bin?) • Favorite object? • Get image, spectrum and/or catalog data for your pet galaxy • Don’t remember the coords? Try name resolver at http://voservices.net/ned/ • Build a series of SDSS mosaic images • Get images of astronomical objects given by RA and Dec (or by name?) • Write code to make a movie zooming on any given galaxy (coords or name) • Your idea here… NVO Summer School, Aspen 2004

  16. Where to go • Links in the talk • http://skyserver.sdss.org/ • http://voservices.net/spectrum/ • http://voservices.net/filter/ • http://openskyquery.net/ • Other relevant links • http://us-vo.org/ • http://voservices.org/ • http://www.ivoa.net/ NVO Summer School, Aspen 2004

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