ASAS-SN Discovery of a Very Bright Optical Transient
ATel #6233; K. Z. Stanek, A. B. Davis, T. W.-S. Holoien, B. J. Shappee, C. S. Kochanek, 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 14 Jun 2014; 16:30 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Krzysztof Stanek (email@example.com)
Subjects: Optical, Cataclysmic Variable, Transient
Referred to by ATel #: 6235
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-14cl 21:54:57.62 26:41:16 2014-06-14.52 10.66
ASASSN-14cl was present in four images obtained with two cameras on
2014 June 14 but undetected (V>16.2) on 2014-06-13.5 and earlier.
There is a nearby blue SDSS source (21:54:57.68, +26:41:12.76), with g=18.8 and
r=18.7, 3" away from our nominal position in the discovery image and 1.1"
away from the transient position in the second detector (ASAS-SN image scale is 7.5"/pixel)
ASASSN-14cl 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.