1. GAVO – after one year H.-M. Adorf & the GAVO team

2. ADA III - 29-04-2004 GAVO’s Pillars Publication and federation of datasets including theoretical ones Spatial matching & classification & visualization (NGSE) Grid computing

3. ADA III - 29-04-2004 The GAVO Team PI: Wolfgang Voges, MPE, Garching CoI: Matthias Steinmetz, AIP, Potsdam Hans-Martin Adorf, MPE Harry Enke, AIP Gerard Lemson, MPE

4. ADA III - 29-04-2004 Collaborations MPE, Garching (Peter Schuecker) AIP Potsdam Canadian Virtual Obs. (CVO), Victoria Universitaetssternw. Muenchen (USM) MPA, Garching (Planck, …)

5. ADA III - 29-04-2004 GAVO Work Areas Publication of ROSAT datasets REST-based SCS service (HTTP GET in; XML, CSV, HTML out) SOAP-based SCS service MCMCS Download Manager Fuzzy spatial matcher Grid-based detection of galaxy clusters ROSAT matcher/classifier service

6. ADA III - 29-04-2004 ROSAT All-Sky Survey (RASS) BSC, FSC & Photons VO-compatibility: Input: Simple cone search Output: VOTable, … New features Exposure times Galactic & Cartesian coordinates Healpix indices

7. ADA III - 29-04-2004 SCS

8. ADA III - 29-04-2004 Result

9. ADA III - 29-04-2004 VOTable

10. ADA III - 29-04-2004 MCMCS Download Manager Tool … … accesses registry at JHU User … … selects up to 70 distributed catalogues … specifies one or more sky-locations Tool … … queries remote catalogues … retrieves datasets (VOTables) for further processing

11. ADA III - 29-04-2004 MCMCS Download Manager

12. ADA III - 29-04-2004 MCMCS Download Manager

13. ADA III - 29-04-2004 Workflow

14. ADA III - 29-04-2004 Fuzzy spatial matcher Essential for data mining Prototype features  Performs “fuzzy” match between pairs of source lists from different catalogues  Computes probability of real match based on astrometric uncertainties Moving matcher into production use  Currently exported to Canadian Virtual Observatory  Feeding matches to ClassX classifier Long-term goal: assemble an SED

15. ADA III - 29-04-2004 Fuzzy spatial matcher (ctd)

16. ADA III - 29-04-2004 Grid computing What is Grid-computing? Globus Toolkit, SGE, EJBs WebServices Detection of galaxy clusters using RASS photons, SDSS RASS source classification using RASS B/FSC, SUMSS, NVSS, USNO

17. ADA III - 29-04-2004 Workflow

18. ADA III - 29-04-2004 Galaxy-cluster detection Search for galaxy clusters in heterogeneous databases RASS photons SDSS Software FORTRAN 90 code (data analysis) Perl scripts (data/grid management) Globus Toolkit

19. ADA III - 29-04-2004 Galaxy-cluster detection Components Setup script  Sets up the directory structure  Distributes the software across the grid Execution script  Triggers the parallel execution on the compute nodes Data collection script  Retrieves the results from the compute nodes

20. ADA III - 29-04-2004 GAVO Mini-GRID

21. ADA III - 29-04-2004 Status Perl scripts Upgrading the RASS Photon DB Soon integrate the SDSS mirror copy

22. ADA III - 29-04-2004 RASS-source classifier ClassX: international collaboration  T.A. McGlynn, A.A. Suchkov, E.L. Winter, R.J. Hanisch, R.L. White, F. Ochsenbein, S. Derriere, W. Voges, M.F. Corcoran Requires data from several sky-surveys  X-ray: ROSAT BSC+FSC  Optical: USNO, (SDSS)  Infrared: (2MASS)  Radio: FIRST, NVSS, SUMSS Distributed multi-wavelength VO-application

23. ADA III - 29-04-2004 Data Flow

24. ADA III - 29-04-2004 PoseQuery

25. ADA III - 29-04-2004 DisplayQueryResult

26. ADA III - 29-04-2004 DisplayMatchResult

27. ADA III - 29-04-2004 The matching problem

28. ADA III - 29-04-2004 DisplayXMatchResult

29. ADA III - 29-04-2004 DisplayClassXResult

30. ADA III - 29-04-2004 RASS-source classifier State & session management Using Java Servlet session mechanism Internal abstract state machine Strong points End-to-end VO-application Works with lists of objects / sky-coordinates Accesses several distributed databases Uses deterministic matcher (at Vizier and SDSS) Uses probabilistic matcher (at GAVO) Uses data analysis service (at NASA)

31. ADA III - 29-04-2004 RASS-source classifier Future work Use IVOA-standards or protocols  VOTable  WSDL, SOAP-based Web Services  Add graphics Multi-threaded Modularize, generalize and make S/W configurable

32. ADA III - 29-04-2004 RASS-source classifier Open questions Is an HTML form-based GUI sufficiently powerful to control a complex grid application? What are the user expectations wrt the workflow? Is there a standard workflow that one could use / agree upon?

33. ADA III - 29-04-2004 Conclusion GAVO is a small, but ambitious project Two Grid applications Detection of galaxy clusters  Globus Toolkit Classification of ROSAT sources  Based on WebServices

34. ADA III - 29-04-2004 References GAVO Mid-Term Report, 90 pages, http://www.g-vo.org (soon) http://www.g-vo.org Detection of X-ray Clusters of Galaxies by Matching RASS Photons and SDSS Galaxies within GAVO, P. Schuecker, H. Boehringer, W. Voges, A&A (submitted) Automated classification of ROSAT sources using heterogeneous multiwavelength catalogs, T.A. McGlynn et al., ApJ (submitted)