[vsnet-alert 19074] ASASSN-15pu: new WZ Sge-type dwarf nova
tkato at kusastro.kyoto-u.ac.jp
Thu Sep 24 15:35:55 JST 2015
ASASSN-15pu: new WZ Sge-type dwarf nova
Berto Monard and Josch Hambsch have reported observations.
Monard's data on Sep. 19 showed double-wave early superhumps
with a period of 0.0600(4) d. Only two days later, Hambsch's
data did not show a strong signal (maybe due to low sampling
rate). The long period of early superhumps and large
outburst amplitude may suggest a period bouncer.
ATEL #8068 ATEL #8068
Title: Bright, High-Amplitude CV Candidate ASASSN-15pu
Author: K. Z. Stanek, C. S. Kochanek, G. Simonian, J. S. Brown, T.
W.-S. Holoien, D. Godoy Rivera, U. Basu, J. F. Beacom, T. A. Thompson
(Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories),
J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong,
Ping Chen (KIAA-PKU), J. Brimacombe (Coral Towers Observatory), E.
Falco (CfA), P. R. Wozniak (LANL), G. Pojmanski (Warsaw University
Queries: stanek.32 at osu.edu
Posted: 18 Sep 2015; 20:35 UT
Subjects:Optical, Cataclysmic Variable
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or
"Assassin"), using data from the quadruple 14-cm "Cassius" telescope
in CTIO, Chile, we discovered a new transient source:
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-15pu 21:11:04.689 -39:56:33.97 2015-09-18.2
ASASSN-15pu was discovered at V=13.7 in "Cassius" images taken on
2015-09-18.206, but not present (V>17.0) in images taken on
2015-09-13.18. At the position of the transient, Vizier reports only
one match, to a faint j=22.1 GSC2 source.
Given the large amplitude of its outburst, this transient may be a WZ
Sge-type dwarf nova. Follow-up observations are encouraged.
We thank LCOGT and its staff for their continued support of
ASAS-SN. ASAS-SN is supported by NSF grant AST-1515927, the Mt. Cuba
Astronomical Foundation, and the Center for Cosmology and
AstroParticle Physics (CCAPP) at OSU. For more information about the
ASAS-SN project, see the <A
Homepage</a> and the list of all <a
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