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ASAS-SN Discovery of A Probable Supernova in PGC 007377

ATel #6345; 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), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 26 Jul 2014; 17:55 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 007377:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14eo  01:57:36.75    +16:46:20.7      2014-07-26.57    16.0 

ASASSN-14eo was discovered in images obtained on UT 2014-07-26.57 at V~16.0 mag. We also detect the object in images obtained on UT 2014-07-25.61 (V~15.9), UT 2014-07-24.56 (V~15.9), and UT 2014-07-23.56 (V~16.0). We do not detect (V>16.7) the object in images taken on UT 2014-07-16.56 and before. This figure shows the ASAS-SN V-band reference image (left), the ASAS-SN July 26 V-band discovery image (center), and the ASAS-SN July 26 discovery subtraction image (right). The red circle has a radius of 10" and is centered on the ASAS-SN position of the transient.

The ASAS-SN position of ASASSN-14eo is approximately 1.3" South and 9.4" East from the center of the galaxy PGC 007377 (z=0.026819, d=109 Mpc, via NED), giving an absolute V-band magnitude of approximately -19.3 (m-M=35.18, A_V=0.148). 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.