ASAS-SN Discovery of a Very Bright Optical Transient

ATel #6676; B. J. Shappee (Hubble Fellow, Carnegie Observatories), K. Z. Stanek, A. B. Davis, G. Simonian, T. W.-S. Holoien, C. S. Kochanek, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 9 Nov 2014; 07:15 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Benjamin Shappee (shappee@astronomy.ohio-state.edu)

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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 transient source:

 
Object       RA (J2000)   DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14jv  18:53:28.87  +42:03:43.59     2014 Nov 9.19   11.3 

ASASSN-14jv was present in two images obtained on 2014 Nov 9 but undetected (V>15.7) on 2014-11-07.2 and earlier. There is a nearby blue source in the Kepler Input Catalog (18:53:28.814, +42:03:43.57), with g=19.1, r=19.4, and i=19.6, 0.6" away from our nominal position in the discovery image (ASAS-SN image scale is 7.5"/pixel). Additionally, there is also a GALEX source 0.021' away from our nominal position. ASASSN-14jv is most likely a large-amplitude CV outburst, caught very early.

Follow-up observations are encouraged.

We thank LCOGT and its staff for their continued support of ASAS-SN. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.