April 12 13, 2006

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HEASARC Collaborations and Interoperable Services

• Tom McGlynn

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Summary

• MAST access to HEASARC optical data
• SkyView
• The HEASARC in the VO

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MAST access to Optical Data

• Some missions have instruments in multiple
  wavebands.
• Need to ensure that all communities interested in
  data have access.
• XMM, Swift, and possibly INTEGRAL.
• EUVE precedent
• XMM senior review and other reviews of HEASARC
• Effort to provide access to XMM Optical monitor
  data initiated November 2005.
• Data made available February 2006.
• HEASARC
• Delivers catalog data
• Provides optical data in organized form
• HEASARC continues to fully support all XMM data.
• MAST
• Downloads catalog updates and quicklook data
• Links to HEASARC for lower level datasets.
• Swift UVOT natural candidate for next mission.
• Optical data already segregated. Should make
  access from MAST easier.

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SkyView

• Introduction
• Usage statistics
• SkyView in a Jar
• demo
• Plans

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SkyView Introduction

• Single simple interface to generate images of the
  sky from survey datasets.
• Handles resampling, rotations, coordinate
  transformations, rescaling, mosaicking.... All
  the geometric issues in getting an image.
• Surveys from radio through the gamma-ray regime.
• CGI and batch interfaces using IDL code-base
• Re-engineered to use Java.

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SkyView surveys
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SkyView usage
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Images generated

• UV 1562
• SFD 1301
• COBE 1155
• HEAO 1 A2 933
• SHASSA 834
• SDSS 785
• RXTE Slew 754
• GRANAT/Integral 642
• Comptel 523

• 2MASS 280119
• DSS 116364
• NEAT 40586
• ROSAT 35291
• DSS2 15194
• Radio 14897
• IRAS 8623
• EGRET 4351
• EUVE 2078
• H-Alpha 1842

Jan 1-Mar 28, 2006
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SkyView-in-a-Jar

• Users can immediately download and run the
  SkyView engine on their machine.
• Access to essentially all surveys in the standard
  SkyView
• Now has many capabilities not in the standard
  SkyView
• better resamplers, image scaling, de-edgng, more
  catalogs, catalog filtering, more powerful
  gridding...)
• Offloads processing burden from SkyView server
  machines.
• Demo!

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Implications

• Use of the VO to access data.
• Standard protocol limits problems with data
  providers
• Easy to add new surveys/catalogs/...
• Distribution paradigm
• Long-term maintenance of package
• Easy incorporation of community enhancements.
• Statistics
• Likely to lose large users who dominate request
  numbers.
• May have started already.
• Should we implant tracers?

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SkyView Grant

• 1 Year, 100K
• Upgrade SkyView hardware
• Currently most heavily loaded servers
• Integration with HEASARC
• HEALPix and WMAP
• Standardized resampling libraries
• Testing of re-visualization
• Survey publication portal

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HEALPix
Enable SkyView to convert data between
traditional pixel maps and HEALPix (used
primarily in WMAP and other microwave background
data)
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Revisualization example
name ra dec type bmaglog
d PGC6926322 35 58.333 57 59.SBS4P. 13.92
1.31 PGC6926022 35 56.733 58 00.E.2.P.
14.33 0.99 PGC6925622 35 51.933 56 42
14.57 1.10 PGC6927022 36 04.133 56
52.SAS7.. 13.23 1.36 PGC6926922 36 03.533
58 35.SBS4P. 14.11 1.26 PGC6927922 36
20.333 59 07RSXS0.. 16.70 0.86
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SkyView as a survey publication portal

• Role in VO world...
• Long term support for small to medium size survey
  datasets.
• 3-5 TB storage.

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The HEASARC in the VO.

• What is the VO?
• What is the HEASARC doing in the VO?
• What does the HEASARC get out of the VO?

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What is the VO?

• International collaboration of scientists and
  programmers for sharing data, services, and
  scientific expertise.
• International Virtual Observatory Alliance (IVOA)
  has 16 members (see http//ivoa.net)
• US effort, the National Virtual Observatory (NVO)
  primarily funded through NSF grant 2002-2007.
  Joint NASA/NSF AO anticipated Spring 2006 (see
  http//us-vo.org)
• Defines standardized protocols, for data queries,
  and data interchange, provides references
  software implementations, forums for interchange
  of ideas and software, training, ...
• Does not police archives or set policy

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Some Key VO Elements

• Data protocols
• Standardized table format
• ConeSearch and SkyNode protocols to access
  catalogs
• Image (SIA) and Spectrum (SSA) protocols to
  access data.
• Registry of astronomical resources
• Software tools DataScope, WESIX, WCSFixer,
  Aladin, VOPlot, VOStat, TOPCAT, ...

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HEASARC role

• Member of the NVO team.
• Funding through USRA with HEASARC forgoing office
  overhead (1 FTE)
• HEASARC contribution of time.
• Lead in applications area.
• Data discovery and multi-archive browsing tool
• Summer school
• Helped define VOTable standards and data access
  protocols
• Leader in the implementation of VO standards.

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What do we get out of it.

• HEASARC access to data.
• New markets for HEASARC data
• Integrated archive access to NASA/ground data.
• Using HEASARC data in standardized tools.
• Cross-pollination with other VO providers.
• HEASARC leadership in the community.

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VO Protocols help us get data

• SkyView New tools use SIA and Cone search to
  access remote archives and catalogs (SDSS, Galex,
  NED, ...)
• Portable software distributes capability, VO
  standards distribute data.
• Registry access for new Browse keyword search
  interface (for Vizier metadata)
• Need to
• Provide SkyNode capabilities for Browse which
  will enable general cross-correlations and access
  to SDSS and GALEX catalogs

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New protocols enable new users to get to our data

• HEASARC datasets are visible in many new venues
• Service registries at ST, CalTech, NCSA, UK
• DataScope
• Links from VOEvent services
• A large fraction of registered VO queryable
  resources are at the HEASARC.
• Leading the full implementation of VO access to
  our data.
• Registries provide new ways to select interesting
  Browse tables.
• Usage gt 10K catalog queries per day from VO
  sources (gt40 of all Browse queries) but most of
  these are exploded from much smaller number of
  queries from DataScope and similar services.
• Greater visibility of gamma-ray burst information
  through generalized VOEvent services
• Need to
• Provide Image and Spectrum access to HEASARC
  archival data as well as SkyView surveys.

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Integrated Access to NASA and ground archives

• DataScope tool.
• Provides answer to simple question of what data
  is available at a given point.
• Summarizes image surveys, observations, objects
  known, ...
• Links inside HEASARC, NED, MAST, SIMBAD, ADS
• Ships data to VO enabled services Aladin, MAST,
  VOStat, VOPlot
• VO data/software broker
• Usage 900 req/month but each request checks
  hundreds of resources.
• Need to
• Make clearer, more efficient and responsive
• Some similar capabilities in VO registry search
  tools and applications like Aladin.

March 2006 through 3/27.
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DataScope Summary of Resources available near
3c273.
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DataScope Summary of Resources available near GRB
060323.
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Use of HEASARC data in generic tools

• VO Registry Searches for HEASARC resources.
• VO has built effective standards for
  astronomical data tables.
• Aladin, VOPlot, VOStat, Mirage, VOStat, ... can
  all analyze HEASARC tables and query results.
• TOPCAT demo.
• Need to
• Make these capabilities visible to users

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Cross-Pollination

• Browse keyword search interface inspired by
  efforts at NOAO.
• Dynamic response to user entry (AJAX)
• Database of words used in metadata
• Use of VO registry
• SkyView-in-a-Jar uses same delivery protocols as
  Aladin, VOPlot, TOPCAT

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HEASARC Leadership in the VO

• HEASARC is seen as one of the major sites in a
  key activity for the community
• NASA leadership role
• Decadal review
• AAAC report lauding NVO and recommending further
  action
• HEASARC leadership of NVO Summer School
• Need to
• Parlay this into a significant role in NVO
  facility.

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