Demonstration of vo tools and technology
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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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Demonstration of vo tools and technology

Demonstration of VO Tools and Technology

Tamás Budavári

Johns Hopkins University


Vo tools

Direct access to

Images

Spectra

Catalogs

Higher level

Cross match

etc.

VO Tools

NVO Summer School, Aspen 2004


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Sdss image cutout

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


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Spectrum services

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


Bandpass services

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


Demonstration of vo tools and technology

NVO Summer School, Aspen 2004


Catalog access

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


Open skyquery

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


Summary

Direct access to

Images

Spectra

Catalogs

Higher level

Cross match

etc.

Summary

Your project here

NVO Summer School, Aspen 2004


Project ideas

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


Where to go

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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