a heterogeneous telescope network alasdair allan tim naylor eric saunders university of exeter iain...
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A Heterogeneous Telescope NetworkAlasdair Allan
Tim Naylor
Eric SaundersUniversity of Exeter
Iain Steele
Chris MottramLiverpool John Moores University
Tim Jenness
Frossie Economou
Brad Cavanagh
Andy AdamsonJoint Astronomy Centre, Hawaii
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The eSTAR concept
Three fundamental ideas behind the project which makes it unique:
• Treat telescopes and databases in a similar manner, both being made available on the Observational Grid
• The main user of the Grid and the Virtual Observatories should not be humans, but autonomous intelligent software agents
• These software agents are reactive, examining the results of observations, and then scheduling follow up observations based on their analysis of the existing data
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What is an agent anyway?
• An agent is “just software” not magic
Loosely, an agent is a computational entity which:
• Acts on behalf of another entity in an autonomous fashion• Performs its actions with some level of proactivity and/or
responsiveness• Exhibits some level of the key attributes of learning, co-
operation and mobility
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How far we’ve come…
First talked about eSTAR at NAM in
2002, since then…
• Established small prototype network using “off the shelf” telescopes
• Deployed the system onto UKIRT in Hawaii for GRB follow up
• Research into grid markets and agent technologies
• Research into Adaptive Dataset Planning (ADP)
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eSTAR and UKIRT
• All aspects of an observation programme at the JAC are either software readable or software controllable
• To the agent its irrelevant that’s there is a human in the loop
• Agents now being deployed to carry out GRB follow-up
© Nik Szymanek
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eSTAR and ADP
• Traditional variable star observing is strongly time constrained
• Aliasing problems dominate, inefficient and expensive
Adaptive dataset planning is about,
• Finding the ideal observing pattern for a given period range…
• …and if we have an existing dataset, deciding when we should best observe
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The short term plan…
We have an exciting time ahead:
• Deploy eSTAR onto Robonet-1.0 to allow it to carry out observations using adaptive dataset planning and do micro-lensing work this summer [MAY]
• Finish work on the WFCAM/eSTAR Transient Object Detection Agent in collaboration with the JAC [JULY]
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eSTAR and Robonet-1.0
• Searching for extra-Solar planets using gravitational microlensing in the galactic bulge
• Real time GRB follow-up using the same agent software as UKIRT
• Consortium “open” time, a testbed for our adaptive dataset planning work
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The eSTAR network
© Nik Szymanek
UKIRT @ JAC
User Agents
The Grid
Embedded Agent
Robonet-1.0
Embedded Agent
OGLE Alert
Alert Agent
GCN Alert
Alert Agent
Alert Agent
WFCAM
The VO
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In the longer term…
• Adding more telescopes, means the network becomes heterogeneous. Does that mean more complexity?
• What about the existing proprietary networks?
• Need to establish interoperability between the existing networks. Standards based, using RTML (and VOEvent for notification?)
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The eSTAR meta-network
User Agents
The GridBrokerService
ProprietaryTelescope Network
Ale
rts
Alert Agent
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A Grid Market
User Agents
The Grid Grid Market
BrokerService
ProprietaryTelescope Network
BrokerService
ProprietaryTelescope Network
The VirtualObservatory
BrokerService
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Other telescope networks
eSTAR• JAC Hawaii ( www.jach.hawaii.edu )• Robonet-1.0 ( www.astro.livjm.ac.uk/RoboNet/ )
Collaborators• RAPTOR ( www.raptor.lanl.gov )• SGM & SMARTS ( aaaprod.gsfc.nasa.gov/SGM/ )• MONET ( www.uni-sw.gwdg.de/~hessman/MONET/ )• SuperWASP ( www.superwasp.org )
Others• REX ( star-www.st-and.ac.uk/~kdh1/rex/rex.html )• ASTRA ( citadel.edu/physics/astra/ )• STELLA ( www.aip.de/stella/ )
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Other agent based projects
• The Thinking Telescope System (Los Alamos) www.thinkingtelescopes.lanl.gov
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The HTN WorkshopJuly 18 -21 2005
Aims• Interoperability between robotic
telescope networks• Interoperability with the Virtual
Observatory (VO) for event notification
• Establishment of an e-market for the exchange of telescope time
See htn-workshop2005.ex.ac.uk
Science Goal Monitor
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Summary
• One way to hide differences is by adding brokering layers to a system, this works just as well for the VO as it does for the telescope networks I’ve described.
• The addition of a Grid Market allows heterogeneous proprietary resources to be bartered
• For more information about the eSTAR Project see our website www.estar.org.uk
• For more information about the upcoming HTN Workshop in Exeter this July see the conference website htn-workshop2005.ex.ac.uk