VOEvent transient sky events

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THE US NATIONAL VIRTUAL OBSERVATORY
VOEvent (transient sky events) Project Options
Rob Seaman, NOAO
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Event Driven Astronomy

• Astronomy has been event driven since the
  beginning
• but, with ad hoc communications

A
B
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Event Driven Astronomy

• in reality

e.g., Tychos De Stella Nova
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Present

• Separate event streams (e.g., GCN)
• Different protocols
• Multiple message formats
• Telegrams great, but
• No standard
• Long latency
• Semantics?

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Future an opportunity for VO
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VOEvent Flow
Subscribers
Authors
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What has been done?

• VOEvent workshop
• v1.0 Specification
• STC, UCD concepts, authentication
• Schema
• Example packets
• Links
• Mailing list archive
• http//www.ivoa.net/twiki/bin/view/IVOA/IvoaVOEven
  t
• eStar/Raptor prototype is live (GRBs, etc)

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VOEvent 1.0 Specification

• ltWhogt Resource Metadata
• ltWhatgt VOTable ltParamgt ltGroupgt
• ltWhereWhengt STC, STCLite
• ltHowgt RTML
• ltWhygt UCD, ontologies
• ltCitationsgt IVO Identifiers
• ltDescriptiongt natural language
• ltReferencegt everything else

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What still needs to be done?

• Sources of events
• GRB (eStar/Raptor)
• AAVSO (Aaron)
• NOAO (SM/SN)
• Transport protocol
• Messaging (Elvin?)
• Internal VOEvent registry
• Packet database

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What else?

• Deploy system
• Publishers
• Authoring clients
• Listening clients
• SEAP (Simple Event Access Protocol)
• VOEvent II workshop (Tucson, 1 Dec 2005)
• the more, the merrier
• Roy can comment on additional activities