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GSC2 Export Catalog

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Any platform. Astronomers Proposal Tool (APT) HST. WWW ... Platform independent. MAST - Multi-Mission Archive at Space Telescope. 9. 10/9/09. Conclusions ... – PowerPoint PPT presentation

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Title: GSC2 Export Catalog


1
GSC2 Export Catalog
Gretchen Greene
2
General Definition
  • All-Sky catalog of unique sources
  • Estimated final size 100 GB
  • Estimated 2 billion entries
  • Challenge what is the final number?
  • Object Naming HTM sequential number within
    region
  • Traditional to GSC 1 method
  • Designed for telescope operations and beneficial
    science
  • Result of successful collaboration between OATo,
    STScI, ESO

3
Catalog Build Milestones
  • GSC 2.0 delivered
  • Limited Sky Coverage, select regions for testing
    GEMINI, ESO VLT, HST BOP
  • GSC 2.1.0 1/00 delivered
  • 800 plates
  • GSC 2.1field 5/00 delivered CFA
  • GSC 2.1.1 9/00 delivered
  • 56 GB binary FITS files
  • 1893 plates, assorted bandpasses
  • GSC 2.2 1/01
  • GSC 2.3 1/02

4
Requirements to-date
  • Telescope Operations
  • ESO, GEMINI
  • SkyCat Integration
  • Maintainable QA API
  • FITS binary files (32768)
  • Direct file system mapping from COMPASS
  • HTM Level 6 File System
  • HTM Level 10, .17, sub indexed
  • Achievable, within project resource scope
  • Expensive API, ie ALL-SKY LARGE catalog

5
Catalog content
  • Look at WWW page now

6
Content Issues
  • Many parameters are non-ideal parameters
  • Position and classification selected by first
    plate observation for a given source
  • Magnitude perhaps not highest accuracy photometry
  • One possible solution select closest plate
    center
  • GSC 1.2 currently included
  • Missing parameters, PA, e, A
  • Different processing, introduces variation in
    accuracy
  • External Catalog entries currently not included
  • Lacking requirements for official catalog

7
User Access
  • ESO SkyCat
  • Required standard configuration for telescope
    observation tools
  • Solaris
  • ShowSky tool
  • COMPASS access and cross-correlation
  • Any platform
  • Astronomers Proposal Tool (APT) HST
  • WWW Browser command line
  • What lies beneath GSC2Query c/cgi
  • Simple area query, ie center coord radius
  • Selectable magnitude ranges
  • Fast, 1sec average seek time

8
Proposed new Access Methods
  • Jsky
  • JAVA version of SkyCat
  • Platform independent
  • MAST - Multi-Mission Archive at Space Telescope

9
Conclusions
  • Get the Data out to as many people as possible!
  • WWW - WWW WWW - WWW - WWW - WWW
  • Need careful review of the content requirements
  • Maintain compatibility to previous versions
  • Export API modification will require 1 month lead
    time (dev, test, base)
  • Estimated time for all-sky GSC 2.2 export 1
    month full tilt
  • Final export catalog will hinge on Public Release
    plans
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