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ASAS-SN Discovery of A Probable Supernova in PGC 054973

ATel #6348; E. Conseil (Association Française des Observateurs d'Etoiles Variables), J. Brimacombe (Coral Towers Observatory), T. W.-S. Holoien, K. Z. Stanek, B. J. Shappee, A. B. Davis, C. S. Kochanek, J. Jencson, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Diego Portales), D. Bersier (LJMU), I. Cruz (Cruz Observatory), S. Kiyota (Variable Star Observers League in Japan), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 28 Jul 2014; 00:01 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 #: 6353

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 PGC 054973:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14ep  15:23:44.06    +68:37:55.6      2014-07-27.21    16.7 

ASASSN-14ep was discovered in images obtained on UT 2014-07-27.210 at V~16.7 mag. We do not detect (V>17.3) the object in images taken on UT 2014-07-24.29 and before. An image obtained on 2014-07-27.88 by E. Conseil using a 0.35m f/11 Schmidt-Cassegrain + ST-10XME (Kodak KAF-3200E CCD) from Slooh Space robotic telescope T2 at Mt. Teide, Canary Islands confirms the discovery of the transient. This figure shows archival DSS image (left) and the E. Conseil confirmation image (right). The red circle has a radius of 3" and is centered on the position of the transient in the confirmation image.

The ASAS-SN position of ASASSN-14ep is approximately 1.6” North and 3.0" West from the center of the galaxy PGC 054973 (z=0.022829, d=95.7 Mpc, via NED), giving an absolute V-band magnitude of approximately -18.3 (m-M=34.9, A_V=0.065). 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.