[vsnet-campaign 1678] two new CVs
Taichi Kato
tkato at kusastro.kyoto-u.ac.jp
Fri Dec 1 11:50:37 JST 2006
ROTSE3 J160213.1-021311.7 : UG (the existence of superhumps
apparently needs to be verified)
WFI J161953.3+031909 : NL+E in the period gap
http://xxx.lanl.gov/abs/astro-ph/0611933
The Incidence of Dwarf Novae in Large Area Transient Searches
Authors: A. Rau, R. Schwarz, S.R. Kulkarni, E.O. Ofek, C. Brinkworth,
S.B. Cenko, Y. Lipkin, A.M. Soderberg
Comments: submitted to ApJ (2006 October 12th)
Understanding and quantifying the contribution of known classes
of transient and variable sources is an important lesson to be
learned from the manifold of pre-cursors programs of the near-future
large synoptic sky survey programs like SkyMapper, Pan-STARRS and
LSST. With this goal in mind, we undertook photometric and
spectroscopic follow-up observations of three recently reported
unidentified transients. For two sources, WFI J132813.7-214237 and
WFI J161953.3+031909, we show that unfortunate coincidences lead to
their previous designation as transients. While the former is now
interpreted as the spatial coincidence of a solar system object with
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 novae
with quiescent brightness of R~22.7 and an outburst amplitude of ~5
mag. Our main conclusion is that cataclysmic variables in their
various avatars will contribute moderately to the population of
transient objects.
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