ASAS-SN Discovery of A Probable Supernova in Dwarf Galaxy GALEXASC J003952.48-380347.3

ATel #6736; T. W.-S. Holoien (Ohio State), J. Brimacombe (Coral Towers Observatory), 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), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables), I. Cruz (Cruz Observatory), S. Kiyota (Variable Star Observers League in Japan), B. Nicholls (Mt. Vernon Obs., New Zealand), J. Nicolas (Groupe SNAUDE, France)
on 23 Nov 2014; 16:45 UT
Credential Certification: Thomas Holoien (tholoien@astronomy.ohio-state.edu)

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During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the double 14-cm "Cassius" telescope in Cerro Tololo, Chile, we discovered a new transient source, most likely a supernova, in the galaxy GALEXASC J003952.48-380347.3:

 
Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14kp  00:39:52.58   -38:03:52.22      2014-11-22.09    16.8 

ASASSN-14kp was discovered in images obtained on UT 2014-11-22.09 at V~16.8 mag. We also detect the object in images obtained on UT 2014-11-23.06 (V~17.0), and UT 2014-11-15.17 (V~17.1) and is marginally detected on UT 2014-11-12.16 (V~17.5). We do not detect (V>17.2) the object in images taken on UT 2014-11-09.11 and before. Images obtained on UT 2014-11-23.13 with the LCOGT 1-m robotic telescope in Cerro Tololo, Chile, and by J. Brimacombe on UT 2013-11-23.16 with the the RCOS 51-cm telescope in New Mexico confirm the discovery of the transient. This figure shows the archival DSS image of the host (left) and the LCOGT V-band confirmation image (right). The red circle has a radius of 5" and is centered on the position of the transient in the LCOGT image.

The position of ASASSN-14kp is approximately 3.5" South and 0.1" East from the center of the galaxy GALEXASC J003952.48-380347.3, a likely dwarf galaxy with no available spectroscopic redshift in NED. Follow-up observations, particularly spectroscopy, 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.