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VOEvent Wrap-up
Rob Seaman
For Roy Williams
IVOA InterOp, Trieste
23 May 2008
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Many thanks
To the Semantics working group for guidance with vocabularies (especially the Gray twins, Norman and Alasdair)
To Alasdair Allan as HTN liaison
To Roy – thanks for all the fish
HTN Call For Proposals
Faulkes South
Faulkes North
MONET North
LiverpoolTelescope
Heterogeneous Telescope Networks
http://www.telescope-networks.org/cfp
La Réunion
Milestones – furious activity
First VOEvent meeting in April 2005Many (~ 18) meetings since
First packets exchanged in June 2005
IVOA recommendation in November 2006HTN 2005VOEventNet (NSF) 2005VO-GCN (NASA) 2007
BackboneBackbone
The emerging VOEventNetThe emerging VOEventNet
Roy Williams Alasdair AllenAndrew Drake Matthew GrahamRob Seaman Phil WarnerRobert White Scott Barthelmy
Roy Williams Alasdair AllenAndrew Drake Matthew GrahamRob Seaman Phil WarnerRobert White Scott Barthelmy 26 May 200626 May 2006
DataScope etcDataScope etc VOSpace etc VOSpace etc
UKIRTHawaiiUKIRTHawaii
Palomar-Quest CaltechPalomar-Quest Caltech
Palomar P60CaltechPalomar P60Caltech
PairitelBerkeleyPairitelBerkeley
Liverpool TelescopeLa PalmaLiverpool TelescopeLa Palma
OGLE IIILas CampanasOGLE IIILas Campanas
Faulkes SouthAustraliaFaulkes SouthAustralia
Faulkes NorthHawaiiFaulkes NorthHawaii
SDSS SNe U Wash/StanfordSDSS SNe U Wash/Stanford
RAPTOR x 8LANLRAPTOR x 8LANL
SWIFT, GLAST etcSWIFT, GLAST etc
VOEventVOEvent
OtherOther
Event FlowEvent FlowKey Roles
Author
Subscriber
Key Roles
Author
Subscriber
Publisher
Filter
Repository
Publisher
Filter
Repository
JACHawaiiJACHawaii
ExeterExeter
CaltechCaltech
LANLLANL
Data MiningExeterData MiningExeter
SkyDOT(database)SkyDOT(database)
Microlensing Survey ExeterMicrolensing Survey Exeter
Tools/ServicesCommunityTools/ServicesCommunity
SurveysCTIO/KPNOSurveysCTIO/KPNO
NOAONOAO
VO-GCNVO-GCNGCNNASA GSFC
GCNNASA GSFCCBATCBAT
AAVSOAAVSO
GeminiGemini
Key v2.0 issues are: Embracing:Vocabularies semantically aware science
Signatures data integrity / per stream DQA
External schemata outside communities
Time series the larger time domain
Orbital elements the workflow
Registry the VO vision
Tweaks the real world
V2.0 will be backwards compatible
v2.0 features anticipated during v1.0 roll-out
v1.1 tweaks to track STC evolution, etc.
v1.1 packets will remain legal under v2.0
Once VOEvent, always VOEvent? schema versioning easier than FITSbut will attempt to avoid changes that require it
Vocabularies
1.5 sessions with Semantics WG
Evolutionary framework for semantics
No mods to VOEvent needed
When new vocabulary is ready, just use explicitly
Natural language remains an option
Signatures
Won’t include signature in <VOEvent>
No mods to VOEvent needed
Will evaluate pilot projects (as demand provides) on transport based and envelope authentication
External schemata
Already in useHeliophysics Knowledgebase
A small change needed to schema
Language may need tweaking
Time series
WG discussed several variations (SDM) after Hotwired workshop in June 2007
Keep as simple as possibleCan elaborate in later revisions
This is most of the effort for v2.0 could slip to v2.1 if necessary
A time series is an aggregate object
multiple instrumentsjoint curationcomplex footprint in time
and in space for moving objectsrequires matched calibrationsassociating detections –> objects
Orbital elements
<Orbit>
<a unit="AU">1.5610990</a>
<e>0.4412673</e>
<i unit="deg">7.21282</i>
<Node unit="deg">353.14214</Node>
<Aop unit="deg">265.00121</Aop>
<M unit="deg">319.73232</M>
<T><ISOTime>1998-03-08T00:00:00</ISOTime></T>
</Orbit>
STC gracefully describes orbits:
Alternate orbit representations
STC provides options:orbital elementsPole and pericenter vectorsRA, Decs at intervals
Support one or all?Ask domain experts
Registering VOEvent assets
VOEventStream coherent scientific entity
VOEventService logistical clustering of functionality
Minor tweaks?
Clarify general usage of references
Explicit <Reference type=“kml”>
Work products
v2.0 standard (& schema)
VOEvent vocabulary
Registry schema for VOEvent
Prototype signing technologies
Notes: Transport User guide
Future events
Finalize v2.0 by the Fall InterOp
HTN coordination (HTN IV, July 2008)
ADASS tutorial or BoF
VOEvent IV (Spring 2009?)
Other activities continue, e.g.:VO-GCNVOEventNeteSTAR