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					N A Walton: SC2004 - Pittsburgh: Nov 10, 2004   p1   Printed: 08/11/04
N A Walton: SC2004 - Pittsburgh: Nov 10, 2004   p2   Printed: 08/11/04
                                       Supernova Remnant
                                       Cassiopeia-A – a 300
                                        year old Supernova

                                         The Challenge and
                                        Opportunity of multi-
 Shocks seen in the X-ray
                                          Wavelength data:
                                                                                        Dust shows in the IR
 Chandra image




                                                                                                  Mapping e¯s in
Heavy elements                                                                                    the magnetic
seen in the                                                                                       field as revealed
optical                                                                                           by Radio data
                                                         Images from Chandra Science Centre

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The Need for Virtual Observatories:
 Managing Technological Change


                               ●   The massive Growth of Data
                                   ●   Number + size of telescopes
                                       ●   Optical: ESO's 4x8m VLT, 2x8m Gemini
                                       ●   X-ray: XMM-Newton
                                       ●   sub-mm: ALMA
                                   ●   Increase in size and multiplex capabilities of
                                       instrumentation:
                                       ●   Infra-Red: VISTA > 100 GB/nights
                                       ●   Radio: e-Merlin > data rates ~320 Gbps
                                 ●     All sky at 0.1 arcsec – 100 TB
  N A Walton: AstroGrid SAG : Meeting 1 : IoA : June 19, 2003                  p4   Printed: 08/11/04
AstroGrid (VO) Key Goals
Enable Science by:
●   Improving the quality, ease, speed and cost effectiveness
    of on-line astronomy
●   Making comparison and integration of data from diverse
    sources seamless and transparent
●   Removing data analysis barriers to multiwavelength
    analysis
●   Enabling access and manipulation of large data sets




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AstroGrid 'Ten' Key Science Drivers




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The International Virtual Observatory
          Alliance (IVOA)
            agreeing vital low level standards




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Deployment Strategy
     ●Goal: provide rapid operational feedback to ongoing
                       development process
●   AstroGrid has an iterative release cycle
●   Each release is deployed during the following 'iteration'
●   Deployment
      – Release s/w components installed on the AstroGrid Testbed
      – Associated release documentation and walk throughs
      – Dedicated feedback reporting system
      – In use with 'beta-testers'

●   Integration of AstroGrid testbed with EU Astrophysical
    Virtual Observatory activities

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The AstroGrid Testbed




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  Iteration 05 Deployment Release
                              complex workflows




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Itn05: use in AVO Demo: Jan 2004
discovering distant quasars from multi-λ data




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New Science with the AVO Demo Tool




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    1 st   Science from the AVO
    enabling mass scale data mining

●    Search for high luminosity Type 2 QSO's
      –    Optically obscured due to viewing thru the dust torus
●    Use of deep multicolour data – GOODS
      –    HST ACS, XMM/ChandraX-Ray
●    Use of AVO demonstrator tool
      –    Revealed 4 times more Type-2 quasars in sample
      –    Tool demonstrates ease of access to data
            ●    Enabled via interoperability standards
      –    Enhancement: Workflow to enable mass scale redshifts
●    Padovani et al: astro-ph/0406056


       N A Walton: SC2004 - Pittsburgh: Nov 10, 2004      p16   Printed: 08/11/04
    Iteration 06 Deployment Release
●   More complex IVOA
    standard implementation
    –   SIAP interface
●   Query builder: interface
●   Workflow: programmable
●   Registry: harvesting
●   Applications: varied
●   Data: image and tabular




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Movie Maker Workflow




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AstroGrid: Helper Applications
●   Range of externally provided applications: tools to analyse
    and visualise end and intermediate data products
      – VOPlot: handles VOTable data
      – VOPlot3D: handles VOTable data – 3D visualisation
      – Topcat: tabular data and manipulation
      – VOSpec: spectral plotting and analysis package
      – Specview: spectral plotting and analysis package
      – Aladin: data visualisation and catalogue access
             ●   MySpace browser capability (read-only)
●   See http://wiki.astrogrid.org/bin/view/Astrogrid/VoResources



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The Next Steps:
Participant in VO Science Demos 2005
●   AstroGrid: Consortium meeting: mid Dec 2004
     —   Brown dwarf discovery
     —   Solar coronal mass ejections
●   Euro-VO: ESAC, Madrid: 25-26 Jan 2005
     —   Star formation histories
     —   AGB to PN transitions
●   A Widening range of capabilities, data, applications
     —   Increasing scientific usefulness
GOAL: end 2005 – science papers enabled by VOs



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