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ASAS-SN Discovery of A Probable Supernova in Star-Forming Dwarf Galaxy PGC 024396

ATel #6647; J. Nicolas (Groupe SNAUDE, France), 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), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables), S. Kiyota (Variable Star Observers League in Japan), W. Wiethoff (University of Minnesota, Duluth)
on 31 Oct 2014; 01:05 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Optical, Supernovae

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 024396:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14jh  08:40:44.27   +57:15:04.91      2014-10-30.51    16.7 

ASASSN-14jh was discovered in images obtained on UT 2014-10-30.51 at V~16.7 mag. We do not detect (V>16.8) the object in images taken on UT 2014-10-13.59 and before. An image obtained on 2014-10-30.94 by J. Nicolas using a 0.41-m f/3.3 reflector at Dauban, France, confirms the discovery of the transient. This figure shows the J. Nicolas confirmation image (left) and the archival DSS image of the host (right). The red circle has a radius of 5" and is centered on the position of the transient in the J. Nicolas image.

The position of ASASSN-14jh is approximately 4.8" North and 7.6" East from the center of a star-forming dwarf galaxy PGC 024396 (z=0.017533, d=74.7 Mpc, via NED), giving an absolute V-band magnitude of approximately -17.8 (m-M=34.37, A_V=0.17). 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.