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Results of a systematic search for outburst events in 1.4 million galaxies

Drake, A. J. and Djorgovski, S. G. and Graham, M. J. and Stern, D. and Mahabal, A. A. and Catelan, M. and Christensen, E. and Larson, S. (2019) Results of a systematic search for outburst events in 1.4 million galaxies. Monthly Notices of the Royal Astronomical Society, 482 (1). pp. 98-117. ISSN 0035-8711. doi:10.1093/mnras/sty2673.

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We present an analysis of 9 yr of Catalina Surveys optical photometry for 1.4 million spectroscopically confirmed SDSS galaxies. We find 717 outburst events that were not reported by ongoing transient surveys. These events have time-scales ranging from weeks to years. More than two-thirds of these new events are found in star-forming galaxies, while such galaxies only constitute ∼20 per cent of our sample. Based on the properties of the hosts and events, we find that almost all of the new events are likely to be associated with regular supernovae. However, a small number of long time-scale events are found among the galaxies containing AGNs. These events have similar properties to those recently found in the analyses of light curves of large samples of AGNs. Given the lack of such events among more than a million passive galaxies in the sample, we suggest that the long outbursts are associated with supermassive black holes or their environments.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Djorgovski, S. G.0000-0002-0603-3087
Graham, M. J.0000-0002-3168-0139
Stern, D.0000-0003-2686-9241
Mahabal, A. A.0000-0003-2242-0244
Catelan, M.0000-0001-6003-8877
Larson, S.0000-0002-0057-8211
Additional Information:© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2018 September 28. Received 2018 August 17; in original form 2018 March 29. Published: 04 October 2018. CRTS, CSDR1, and CSDR2 are supported by the U.S. National Science Foundation under grant NSF grants AST-1313422, AST-1413600, and AST-1518308. The CSS survey is funded by the National Aeronautics and Space Administration under Grant No. NNG05GF22G issued through the Science Mission Directorate Near-Earth Objects Observations Program. AJD and MC acknowledge partial support by CONICYT’s PCI program through grant DPI20140066. MC is additionally supported by the Ministry for the Economy, Development, and Tourism’s Iniciativa Científica Milenio through grant IC 120009, awarded to the Millennium Institute of Astrophysics; by Proyecto Fondecyt Regular #1171273; and by Proyecto Basal PFB-06/2007. AllWISE makes use of data from WISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, and NEOWISE, which is a project of the Jet Propulsion Laboratory/California Institute of Technology. WISE and NEOWISE are funded by the National Aeronautics and Space Administration.
Funding AgencyGrant Number
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)DPI20140066
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y TurismoIC120009
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1171273
Subject Keywords:galaxies: general – galaxies: active – galaxies: photometry – supernovae: general
Issue or Number:1
Record Number:CaltechAUTHORS:20190722-081423822
Persistent URL:
Official Citation:A J Drake, S G Djorgovski, M J Graham, D Stern, A A Mahabal, M Catelan, E Christensen, S Larson, Results of a systematic search for outburst events in 1.4 million galaxies, Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 1, January 2019, Pages 98–117,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97305
Deposited By: Tony Diaz
Deposited On:22 Jul 2019 16:24
Last Modified:16 Nov 2021 17:30

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