Automated Telescope Grids, Instant Messages
"Intelligent Agent" computer programs are roaming the Internet and watching the skies. It may sound like science fiction, but these programs, using Grid computing technology, will help astronomers detect some of the most dramatic events in the universe, such as massive supernova explosions.
|A diagram showing how the eSTAR network operates. The Intelligent Agents access telescopes and existing astronomical databases through the Grid.
Image Credit: Joint Astronomy Centre
The Agents, created by the "eScience Telescopes for Astronomical Research" (eSTAR) project, have been deployed on the United Kingdom Infrared Telescope (UKIRT) in Hawaii. The work is being announced at a conference in Strasbourg on 14th and 15th October.
Dr. Alasdair Allan, on the eSTAR team at the University of Exeter, said "The universe currently does things faster than we can respond to them. To study the most rapid and violent events in the universe, we need to be able to follow them quickly."
As well as supernova explosions, many other astronomical events happen suddenly and unpredictably. These include the detection of near-Earth asteroids as they move across the sky, rapid changes in the swirling gases being swallowed by black holes, and the subtle changes in the brightness of stars which may indicate planets in orbit around them. A March 29, 2003 hypernova–a gamma-ray burst about 100 times more intense than any previous detections–was continuously monitored using robotically controlled telescopes connected between Australia and Texas.
The Intelligent Agent programs communicate with telescopes and each other using technology designed for the Grid – the "next generation Internet". They make observations with the telescopes, which they can analyze and immediately follow up with further observations, without the need for human intervention.
|The massive star Eta Carinae. This star went through a giant explosive outburst about 150 years ago, suddenly making it one of the brightest stars in the southern sky. In the future, changes like this will be immediately detected and investigated by the eSTAR network. Credit: N. Smith (U. Colorado), J. Morse (Arizona State U.), and NASA|
Prof. Tim Naylor, who led the eSTAR team and is also at the University of Exeter, said "We’re creating a network of telescopes which can respond automatically to objects of great astronomical importance."
Although this is not the first time that telescopes have been automated, or connected to the Internet, Dr. Allan explains "What is so important here is that we have developed an intelligent observing system. It thinks and reacts for itself, deciding whether something it has discovered is interesting enough to need more observations. If more observations are needed, it just goes ahead and gets them."
Frossie Economou of the Joint Astronomy Centre, which operates UKIRT, said "Our plan is for the Agents to send messages to astronomers’ mobile phones, and even pictures if the phone supports them. That way, you’ll be able to follow events at the telescope, no matter where you are in the world."
Dr. Allan continues "The Agents can detect and respond to the rapidly changing universe faster than any human, and make decisions to observe an object much faster than would otherwise be possible. Only then need they tell their human masters what they’re doing."
The Agents were recently put through their paces for the first time on a large research-class telescope: the 3.8-metre United Kingdom Infrared Telescope (UKIRT) on Mauna Kea in Hawaii. An Agent took live images with UKIRT, and compared them with previous infrared maps of the sky. It detected a dwarf nova – a star which experiences sudden flares in its brightness [cataclysmic variable stars].
It wasn’t just technical hurdles that the team had to overcome in order to bring this complex system online. As Dr. Andy Adamson, Director of UKIRT, said "On the test night itself, we even had an earthquake on the island, but everyone remained undaunted. Both the eSTAR Agent and the telescope worked as planned."
In the next few months, the eSTAR Agents will spread from UKIRT to the James Clerk Maxwell Telescope (also operated by the Joint Astronomy Centre). After that, the team will expand the network to include fully robotic telescopes such as the Liverpool Telescope on La Palma, Canary Islands [the world's largest robotic telescope] and the privately-financed, internet-available Faulkes Telescopes in Hawaii and Australia.
So are the eSTAR team planning to put astronomers out of a job? Dr. Allan says not: "The Agents can be used to assist human observers, instead of replacing them entirely – augmenting their abilities to do science quicker, faster, and more reliably."
The eSTAR work is being presented in talks by Alasdair Allan and Frossie Economou at the Astronomical Data Analysis Software & Systems conference in Strasbourg, on the 14th and 15th October respectively. eSTAR is a joint project between the Astrophysics Research Institute at Liverpool John Moores University and the Astrophysics Research Group of the School of Physics at the University of Exeter. This work was a collaboration between the eSTAR project and the Joint Astronomy Centre in Hawaii. The project is funded jointly through the UK’s Department of Trade and Industry, and the Engineering and Physical Sciences Research Council (EPSRC) and Particle Physics and Astronomy Research Council (PPARC).
Related Web Pages
United Kingdom Infrared Telescope (UKIRT)
The Catalog and Atlas of Cataclysmic Variables
Joint Astronomy Centre, Hawaii
Astronomical Data Analysis Software & Systems conference