ASAS-SN Discovery of A Probable Supernova in 2MASX J23451480-2947009
ATel #6737; J. Brimacombe (Coral Towers Observatory), 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), 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; 17:10 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 #: 6765
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 2MASX J23451480-2947009:
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14kq 23:45:15.51 -29:47:01.1 2014-11-23.07 16.8
ASASSN-14kq was discovered in images obtained on UT 2014-11-23.07 at V~16.8 mag. We also marginally detect the object in images obtained on UT 2014-11-19.08, but we do not detect (V>17.8) the object in images taken on UT 2014-11-15.08 and before. An image obtained by J. Brimacombe on UT 2014-11-23.59 with the CDK 43-cm telescope at Savannah Skies Observatory confirms the discovery of the transient. This figure shows the archival DSS image of the host (left) and the J. Brimacombe confirmation image (right). The red circle has a radius of 5" and is centered on the position of the transient in the J. Brimacombe image.
The position of ASASSN-14kq is approximately 2.8" South and 9.1" East from the center of the galaxy 2MASX J23451480-2947009 (z=0.033600, d=137 Mpc, via NED), giving an absolute V-band magnitude of approximately -18.9 (m-M=35.69, A_V=0.051). 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.
