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ASAS-SN Discovery of Candidate Supernova in PGC 2816341

ATel #5654; B. J. Shappee, C. S. Kochanek, K. Z. Stanek, T. W-S. Holoien, J. Jencson, J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU)
on 12 Dec 2013; 21:48 UT
Credential Certification: Benjamin Shappee (shappee@astronomy.ohio-state.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 5655

During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the recently expanded quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a new transient source, likely a supernova, near the center of PGC 2816341:

Object       RA (J2000)   DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-13dm  03:02:10.9  +15:55:38.8       2013 Dec. 4.86     15.9 

ASASSN-13dm was discovered in images obtained 2013 UT Dec. 4.86 at V~15.9, but was undetected (V > 17) in images obtained on 2013 UT Nov. 19.96. The discovery image can be found here. ASASSN-13dm was also detected in images taken on 2013 UT Dec. 5.85, 6.83, 7.84, and 9.83. The transient is located near PGC 2816341 (z=0.017, d=70 Mpc from Virgo-infall corrected velocity, via NED), which would give it an absolute V mag of approx. -18.7 (m-M=34.23, A_V=0.36, Schlafly & Finkbeiner 2011).

We thank LCOGT and its staff for their continued support of ASAS-SN.