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ASAS-SN Discovery of a Very Large Amplitude CV Candidate

ATel #6241; K. Z. Stanek, C. S. Kochanek, A. B. Davis, T. W.-S. Holoien, B. J. Shappee, J. Jencson, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Princeton/Diego Portales), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU)
on 17 Jun 2014; 10:26 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Cataclysmic Variable, Transient

During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a new bright transient source:

 
Object              RA	         Dec	            Discovery	 V 
ASASSN-14cm	 15:45:31.72	01:02:27.8	2014-06-16.45	13.27 
ASASSN-14cm was discovered at V=13.3 in images taken on 2014-06-16.4 and confirmed at V=13.45 on 2014-06-17.4, but undetected (V>16.2) on 2014-06-14.4. There is a 0.7" SDSS positional match to a faint, blue g=22.1 star. ASASSN-14cm is most likely a CV with a very strong, almost 9 mag outburst. Given the large amplitude of its outburst, ASASSN-14cm may be a WZ Sge-type dwarf nova, caught early.

For more information see ASAS-SN Transients page.