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The Incidence of Dwarf Novae in Large Area Transient Searches

Rau, A. and Schwarz, R. and Kulkarni, S. R. and Ofek, E. O. and Kasliwal, M. M. and Brinkworth, C. and Cenko, S. B. and Lipkin, Y. and Soderberg, A. M. (2007) The Incidence of Dwarf Novae in Large Area Transient Searches. Astrophysical Journal, 664 (1). pp. 474-480. ISSN 0004-637X. doi:10.1086/518759.

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Understanding and quantifying the contribution of known classes of transient and variable sources is an important lesson to be learned from the manifold of precursor programs of the near-future large synoptic sky survey programs such as SkyMapper, Pan-STARRS, and LSST. With this goal in mind, we undertook photometric and spectroscopic follow-up observations of four recently reported unidentified transients. For two sources, WFI J132813.7-214237 and WFI J161953.3+031909, we show that unfortunate coincidences led to their previous designation as transients. While the former is now interpreted as the spatial coincidence of a solar system object with a faint background star, the latter is merely a cataclysmic variable unfortunately caught in and out of eclipse. The third candidate, ROTSE3 J160213.1-021311.7, is identified as an SU UMa type dwarf nova with quiescent brightness of R ~ 22.7 and an outburst amplitude of ~5 mag. The fourth event, SDSS-SN 15207, similarly shows evidence for a dwarf nova origin. Our main conclusion is that cataclysmic variables in their various avatars will contribute moderately to the population of transient objects.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Rau, A.0000-0001-5990-6243
Kulkarni, S. R.0000-0001-5390-8563
Ofek, E. O.0000-0002-6786-8774
Kasliwal, M. M.0000-0002-5619-4938
Cenko, S. B.0000-0003-1673-970X
Additional Information:© 2007 The American Astronomical Society. Received 2006 October 12; accepted 2007 April 9. We acknowledge helpful discussions with J. Greiner, E. Mason, and L. Bildsten. We thank M. Sako and A. Becker for the timely alert about the eruption of SDSS-SN 15207. Furthermore, we thank the anonymous referee for constructive comments. This work is supported in part by grants from the National Science Foundation and NASA.
Funding AgencyGrant Number
Subject Keywords:binaries : eclipsing; novae, cataclysmic variables; stars : dwarf novae
Issue or Number:1
Record Number:CaltechAUTHORS:20091203-080503912
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Official Citation:The Incidence of Dwarf Novae in Large Area Transient Searches A. Rau, R. Schwarz, S. R. Kulkarni, E. O. Ofek, M. M. Kasliwal, C. Brinkworth, S. B. Cenko, Y. Lipkin, and A. M. Soderberg 2007 ApJ 664 474-480 doi: 10.1086/518759
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16860
Deposited By: Tony Diaz
Deposited On:04 Jan 2010 23:05
Last Modified:08 Nov 2021 23:30

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