[ Previous | Next | ADS ]

ASAS-SN Confirmation of SN Candidate in NGC 337

ATel #6436; T. W.-S. Holoien (Ohio State), J. L. Prieto (Diego Portales, MAS), C. S. Kochanek, K. Z. Stanek, B. J. Shappee, A. B. Davis, U. Basu, J. F. Beacom (Ohio State), D. Bersier (LJMU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 2 Sep 2014; 15:17 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Thomas Holoien (tholoien@astronomy.ohio-state.edu)

Subjects: Optical, Supernovae, Transient

We report the independent discovery and confirmation of the SN candidate reported in NGC 337 PSN J00594783-0734186 by the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14gm  00:59:47.83    -07:34:19.3      2014-09-02.47    15.5 

ASASSN-14gm was discovered in images obtained on UT 2014-09-02.47 at V~15.5 mag. We do not detect (V>17.3) the object in images taken on UT 2014-08-30.48 and before. The ASAS-SN position of ASASSN-14gm is approximately 21.7" North and 33.7" West from the center of the galaxy NGC 337 (z=0.005490, d=18.2 Mpc, via NED), giving an absolute V-band magnitude of approximately -16.107 (m-M=31.30, A_V=0.307). We note that the ASAS-SN position of this transient is approximately 1.2" North and 1.2" East from the position of type IIP supernova SN 2011dq (CBAT 2749), which is consistent with the two transients having the same position given the ASAS-SN pixel size of 7". Given the rapid rise, this is likely a type-II SN.

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.