[ Previous | Next | ADS ]

ASAS-SN Discovery of A Probable Supernova in 2MASX J06113048-162908

ATel #7349; L. A.G. Monard (Klein Karoo Observatory), T. W.-S. Holoien, K. Z. Stanek, C. S. Kochanek, A. B. Danilet, G. Simonian, U. Basu, N. Goss, J. F. Beacom, T. A. Thompson (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong (KIAA-PKU), P. R. Wozniak (LANL), E. Falco (CfA), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. G. Carballo (Observatorio Cerro del Viento MPC I84), J. M. Fernandez (Observatory Inmaculada del Molino), S. Kiyota (Variable Star Observers League in Japan), R. A. Koff (Antelope Hills Observatory), G. Krannich (Roof Observatory Kaufering), W. Wiethoff (University of Minnesota, Duluth)
on 6 Apr 2015; 21:32 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 #: 7368

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 J06113048-162908:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-15go  06:11:30.50   -16:29:03.52      2015-04-06.05    16.4 

ASASSN-15go was discovered in images obtained on UT 2015-04-06.05 at V~16.4 mag. We do not detect (V>16.7) the object in images taken on UT 2015-04-05.05 and before. An image obtained by L.A.G Monard on UT 2015-04-06.85 with an unfiltered CCD (ST8-XME) on a 35-cm Meade RCX400 telescope f/8 at Klein Karoo Observatory confirms the discovery of the transient. This figure shows the archival DSS image of the host (left) and the L.A.G. Monard confirmation image (right). The red arrow indicates the position of the transient in the L.A.G. Monard image.

The position of ASASSN-15go is approximately 5.0" North and 0.2" West from the center of the galaxy 2MASX J06113048-162908 (z=0.018923, d=80.3 Mpc, via NED), giving an absolute V-band magnitude of approximately -18.6 (m-M=34.52, A_V=0.438). Follow-up observations are encouraged.

We thank LCOGT and its staff for their continued support of ASAS-SN. ASAS-SN is supported in part by Mt. Cuba Astronomical Foundation. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.