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Towards real-time classification of astronomical transients

Mahabal, A. and Djorgovski, S. G. and Williams, R. and Drake, A. and Donalek, C. and Graham, M. and Moghaddam, B. and Turmon, M. and Jewell, J. and Khosla, A. and Hensleya, B. (2008) Towards real-time classification of astronomical transients. In: International Conference on Classification and Discovery in Large Astronomical Surveys, Ringberg Castle, Germany, 14–17 October 2008. American Institute of Physics Conference Proceedings. No.1082. American Institute of Physics , Melville, NY, pp. 287-293. ISBN 9780735406131.

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Exploration of time domain is now a vibrant area of research in astronomy, driven by the advent of digital synoptic sky surveys. While panoramic surveys can detect variable or transient events, typically some follow-up observations are needed; for short-lived phenomena, a rapid response is essential. Ability to automatically classify and prioritize transient events for follow-up studies becomes critical as the data rates increase. We have been developing such methods using the data streams from the Palomar-Quest survey, the Catalina Sky Survey and others, using the VOEventNet framework. The goal is to automatically classify transient events, using the new measurements, combined with archival data (previous and multi-wavelength measurements), and contextual information (e.g., Galactic or ecliptic latitude, presence of a possible host galaxy nearby, etc.); and to iterate them dynamically as the follow-up data come in (e.g., light curves or colors). We have been investigating Bayesian methodologies for classification, as well as discriminated follow-up to optimize the use of available resources, including Naive Bayesian approach, and the non-parametric Gaussian process regression. We will also be deploying variants of the traditional machine learning techniques such as Neural Nets and Support Vector Machines on datasets of reliably classified transients as they build up.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Mahabal, A.0000-0003-2242-0244
Djorgovski, S. G.0000-0002-0603-3087
Williams, R.0000-0002-9145-8580
Graham, M.0000-0002-3168-0139
Turmon, M.0000-0002-6463-063X
Additional Information:© 2008 American Institute of Physics. Issue Date: 5 December 2008. We are grateful to the staff of Palomar Observatory for their help, and to our collaborators in PQ and CSS survey teams. This work was supported in part by the NSF grants AST-0407448, AST-0326524, and CNS-0540369, and by the Ajax Foundation. A.K. and B.H. were supported in part by the Caltech SURF program.
Funding AgencyGrant Number
Ajax FoundationUNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:astronomical image processing; astronomical surveys; astronomical techniques; Bayes methods; image classification; learning (artificial intelligence); neural nets; real-time systems; support vector machines
Series Name:American Institute of Physics Conference Proceedings
Issue or Number:1082
Record Number:CaltechAUTHORS:MAHaipcp08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13283
Deposited By: Tony Diaz
Deposited On:10 Feb 2009 18:23
Last Modified:08 Nov 2021 22:36

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