ASAS-SN Discovery of a Large Amplitude (Delta V ~ 7 mag) CV Candidate
ATel #5775; B. J. Shappee, K. Z. Stanek, C. S. Kochanek, T. W.-S. Holoien, J. Jencson, U. Basu J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU)
on 18 Jan 2014; 22:50 UT
Credential Certification: Benjamin Shappee (shappee@astronomy.ohio-state.edu)
Subjects: Optical, Cataclysmic Variable
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN
or "Assassin"), using data from the recently expanded quadruple 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-14ac 7:52:54.9 +53:05:31.2 2014 Jan. 18.31 14.54
ASASSN-14ac was discovered in images obtained 2014 UT Jan. 18.31 at V~14.5 and was detected in images obtained 2014 UT Jan. 17.46, but was undetected (V > 17) in images obtained on 2014 UT Jan. 11.29. The discovery image can be found here. Vizier reveals a 0.1" SDSS match to a blue g=21.6 star. ASASSN-14ac is most likely a CV with a very strong, nearly 7 mag outburst. Given the large amplitude of its outburst, ASASSN-14ac may be a WZ Sge-type dwarf nova.
We thank LCOGT and its staff for their continued support of ASAS-SN.
