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Virtual Observatories, Press Release Images, and Web Services

Virtual Observatories, Press Release Images, and Web Services. Dr. Frank Summers Space Telescope Science Institute November 3, 2005. Collaborators. Lisa Frattare, Zolt Levay Phil Hodge Kaushi Bandara Bob Hanisch, Carol Christian, Nahide Craig. Virtual Observatories.

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Virtual Observatories, Press Release Images, and Web Services

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  1. Virtual Observatories,Press Release Images,and Web Services Dr. Frank Summers Space Telescope Science Institute November 3, 2005

  2. Collaborators • Lisa Frattare, Zolt Levay • Phil Hodge • Kaushi Bandara • Bob Hanisch, Carol Christian, Nahide Craig

  3. Virtual Observatories • Digital data, digital connections, digital processing • Many telescopes, many repositories, many bandpasses • Define standards, build infrastructure & tools

  4. Press Release Images • Pictures worth a thousand words • VO Problems • Heavily processed • No coordinates • Different metadata

  5. Web Services • User to computer • Computer to computer • XML – self-describing • DTDs, Schema • VOTABLE

  6. Simple Image Access • SIA protocol defines a web service • Input: cone search • Output: list of images • Several types of services: cutout, mosaic, atlas, pointed • www.ivoa.net/Documents

  7. PReSS Images Internet SIA Info Database NVO Interfaces SIA Query Server Public Interfaces

  8. Major Tasks • Gather image data, esp WCS • Assemble image database • Create web service • Register with NVO

  9. PReSS Archive • STScI NewsCenter database • Images • Metadata • Astro info: object, category, instrument • News info: release, primary, composite

  10. Get WCS Info • Identify suitable images • Retrieve FITS files • Run WCS Transfer Tool

  11. Non-VO Images Solar system Composite Print layout Non-astronomical

  12. Astronomical Astronomical w/ notation

  13. FITS & WCS

  14. Process FITS

  15. WCS Transfer Tool • FITS reference image • Public release image • Mark corresponding points • Automatic peak identification • Automatic solution refinement • Python program • Python imaging lib (PIL) • Matplotlib • Tk interface

  16. WCS Results

  17. Create Database • Loop through WCS processed images • Scan through PReSS • Calculate new quantities • Output assembled data • Perl program

  18. HST PR SIA Web Service • Perl programs within Apache web server • Based on SIA 1.0 spec • Process SIA query • Uses modified CGI::Validate • Search database • Create VOTABLE response • Uses GSFC’s ASTRO::VO::VOTABLE • Custom EPO fields • All code will be available

  19. To Do List • Multiple image versions • Test to production server • Document & distribute • Pipeline

  20. Other Things • AAS Astronomy Visualization Session • Webcasts & Audience • Einstein Opera

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