# Presentation: 737232

## HEASARC Collaborations and Interoperable Services 

- Tom McGlynn

## Summary

- MAST access to HEASARC optical data
*SkyView*
- The HEASARC in the VO

## 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.

## Slide 4

## SkyView

- Introduction
- Usage statistics
*SkyView* in a Jar
- demo
- Plans

## 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.

## SkyView surveys

***SkyView***** surveys**

## SkyView usage

## Images generated 

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

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

- Jan 1-Mar 28, 2006

## 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!

## 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?

## 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

## HEALPix

**Enable *****SkyView***** to convert data between traditional pixel maps and HEALPix (used primarily in WMAP and other microwave background data)**

## Revisualization example

- |name    |ra        |dec      |type   | bmag|log d|
- PGC69263|22 35 58.3|+33 57 59|.SBS4P.| 13.92| 1.31|
- PGC69260|22 35 56.7|+33 58 00|.E.2.P.| 14.33| 0.99|
- PGC69256|22 35 51.9|+33 56 42|       | 14.57| 1.10|
- PGC69270|22 36 04.1|+33 56 52|.SAS7..| 13.23| 1.36|
- PGC69269|22 36 03.5|+33 58 35|.SBS4P.| 14.11| 1.26|
- PGC69279|22 36 20.3|+33 59 07|RSXS0..| 16.70| 0.86

## SkyView as a survey publication portal

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

## 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?

## 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](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

## 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, ...

## 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.

## 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.

## 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

## 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: > 10K catalog queries per day from VO sources (>40% 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.

## 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.

## DataScope Summary of Resources available near 3c273.

**DataScope Summary of Resources available near 3c273.**

## DataScope Summary of Resources available near GRB 060323.

**DataScope Summary of Resources available near GRB 060323.**

## 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

## 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

## 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.

## Slide 29