ASAS-SN Discovery of a Bright, Large Amplitude CV Outburst Caught Early
ATel #6455; A. B. Davis, K. Z. Stanek, C. S. Kochanek, T. W.-S. Holoien, U. Basu, J. F. Beacom (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 9 Sep 2014; 23:10 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 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-14gz 17:23:25.95 +33:04:12.08 2014-09-09.26 14.2
ASASSN-14gz was discovered in images obtained 2014 UT September 9.26 at V~14.2 mag. We do not detect this object (V>16.5) in images taken on 2014 UT September 8.29 and before. There is a faint and blue (g=21.9, r=21.8) SDSS source 2" away, for which there is an archival SDSS/BOSS emission-line spectrum taken in quiescence classifying it as a CV.
Given the large amplitude of its outburst, ASASSN-14gz may be a WZ Sge-type dwarf nova, 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.
