Telecon 20060315

Date/Time 14.00 GMT on 15 Mar 2006

Present: AMSR, NAW, MA, EGLEZ

Science Issues for Stage 3: based on analysis of science cases, and Technical Plans

• what is required for the TAP (stage 3) meeting
  • list of applications/ capabilities needed to meet the two cases in VotcSciStageTwo
• Need to find out when the TAP is and bring the following issues below to them.
  • there are a number of capabilities which have recurred - e.g. fit minimisation tool, flux conversio, coverage that need to be addressed.
  • otherwise, focus should be on stablising current implementations.

IMF

• Positional search
• Catalogue data selection: through a registry query - in aladin and/or workbench
• Main catalogues required:
  • Spitzer is the main catalogue - and we are matching against that with objects from 2MASS, IRAS, IUE
  • search catalogues and federate to create a master catalogue
• Conversion of 2MASS from mags to Spitzer fluxes
  • could be done with in VOSpec?
  • ISSUE: magnitude to flux conversion tool: ESO DS4? TOPCAT?
  • ISSUE: Construct SEDs - DS4 ESO? (SpecFIND is only radio)
• Run of MOCASSIN
  • ISSUE: integrate MOCASSIN into CEA (DS3?)
• Comparison of observed SED with model
  • ISSUE: tool to do chi2 minimisation - DS4 work? (or a specific app for this case from Jeremy Yates)

Clusters

• Positional search: need to be covered by SLOAN + Spitzer
  • ISSUE: find me objects of the sky covered by both sloan and spitzer
    • c.f. coverage maps from US-VO at http://irsa.ipac.caltech.edu/applications/QuickStats/
• Catalogues - sloan and spitzer
  • ISSUE: availability of Spitzer catalogues (~600MB/catalogue - SWIRE/per field) - need to get these from IPAC
• Xmatch - AG, STILTS, CDS
• Photometric redshifts
  • HyperZ, Bpz, AstroNeural
  • ISSUE: AstroNeural in stage 3.
• Random catalogue - need to generate this from a monte carlo simulation
  • ISSUE: the 'mask' step may need to be done manually (requires use of MANGLE)
  • ISSUE: configure MANGE to run in a workflow
• Object selection - catalogue cut based on selection criteria (Aladin, STILTS)
• Calculate correlation function - use VisIVO
  • ISSUE: use of VisIVO - reading VOTables in Stage 3.
• 2-d fit - data vs model
  • ISSUE: tool to do chi2 minimisation (note relationship of errors) - DS4 TOPCAT work?

Comments on Stage 3 work

• refering to the plans in the DS4/5/6 pages - see links from StageThreePlanningMeetings

DS4

• AstroGrid - minimisation tool important
• INAF - model data interface > generate the mocassin models?
• CDS - x-match tool, integration plastic, DAL std --> coverage : could some extension on the SED work be considered?
• ESO - SED construction - important - and a flux conversion tool?

DS5

• AstroGrid - no plan on the wiki - so hard to comment
• CDS/INAF - could some extension on the SED work be considered?
• ESO - std unit conversion could be interesting - not sure what it is?

DS6

• AstroGrid - Plastic - fucntionality probably ok as is now - make sure it is fully debugged and robust plus documented. k-d trees could be used to index the large cluster catalogues.
• INAF - AstroNeural and VisIVO through plastic? probably through a workflow/CEA
• CDS - footprint work?

Check sfit for model/observation fitting