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