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ASAS-SN Discovery of a Large Amplitude CV Candidate

ATel #5339; T. W-S. Holoien, B. J. Shappee, K. Z. Stanek, C. S. Kochanek, J. Jencson, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), M. Dubberley, M. Elphick, S. Foale, E. Hawkins, D. Mullens, W. Rosing, R. Ross, Z. Walker (Las Cumbres Observatory), J. Brimacombe (Coral Towers Observatory)
on 29 Aug 2013; 16:15 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Optical, Cataclysmic Variable

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

Object         RA(J2000)     Dec(J2000)     Disc. UT Date     Disc. V mag 
ASASSN-13ck   00:11:33.71     04:51:23      Aug. 29.47         12.9 
ASASSN-13ck was present in images obtained 2013 UT August 29.47 but undetected (V > 17) on 2013 UT August 27. Vizier reveals a 0.6" SDSS match to a blue g=20.8 star. ASASSN-13ck is most likely a CV with a very strong, nearly 8 mag outburst. Given the large amplitude of its outburst, ASASSN-13ck may be a WZ Sge-type dwarf nova.

For more information about the ASAS-SN project see ASAS-SN Homepage and also ASAS-SN Transients page. Please send an e-mail to stanek.32@osu.edu if you would like to be directly notified of future ASAS-SN detections.