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ASAS-SN Discovery of A Probable Supernova in UGC 06837

ATel #6794; S. Kiyota (Variable Star Observers League in Japan), T. W.-S. Holoien, K. Z. Stanek, C. S. Kochanek, A. B. Davis, G. Simonian, U. Basu, J. F. Beacom (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong (KIAA-PKU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables)
on 9 Dec 2014; 16:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Thomas Holoien (tholoien@astronomy.ohio-state.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 6811, 6812

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, most likely a supernova, in the galaxy UGC 06837:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14lo  11:51:53.191   +18:32:31.03      2014-12-08.58    16.2 

ASASSN-14lo was discovered in images obtained on UT 2014-12-08.58 at V~16.2 mag. We also detect the object in images obtained on UT 2014-12-09.55 (V~16.2) and UT 2014-12-07.58 (V~15.9). We do not detect (V>16.3) the object in images taken on UT 2014-12-06.57 and before. An image obtained by S. Kiyota on UT 2014-12-09.38 using a 0.61m CDK + FLI PL-9000 at the ITelescope.NET site at Sierra Remote Observatory confirms the discovery of the transient. This figure shows the archival DSS image of the host (left) and the S. Kiyota confirmation image (right). The red circle has a radius of 5" and is centered on the position of the transient in the S. Kiyota image.

The position of ASASSN-14lo is approximately 16.2" South and 10.3" East from the center of the galaxy UGC 06837 (z=0.019930, d=87.8 Mpc, via NED), giving an absolute V-band magnitude of approximately -18.6 (m-M=34.72, A_V=0.091). 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.