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ASAS-SN Discovery of A Probable Supernova in ESO 113-G032

ATel #6517; C. Gonzalez, C. Contreras (Las Campanas Observatory), E. Y. Hsiao (Aarhus University), S. Kiyota (Variable Star Observers League in Japan), J. Hissong (Columbus Astronomical Society), T. W.-S. Holoien, K. Z. Stanek, C. S. Kochanek, A. B. Davis, U. Basu, J. F. Beacom (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales, MAS), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables), I. Cruz (Cruz Observatory), L. A.G. Monard (Klein Karoo Observatory), J. Nicolas (Groupe SNAUDE, France), B. Nicholls (Mt. Vernon Obs., New Zealand), W. Wiethoff (University of Minnesota, Duluth)
on 30 Sep 2014; 18:23 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 #: 6536

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, likely a supernova, in the galaxy ESO 113-G032:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14ig  01:16:04.95    -61:37:16.7      2014-09-21.33     16.7 

ASASSN-14ig was discovered in images obtained on UT 2014-09-21.33 at V~16.7 mag. We also detect the object in images obtained on UT 2014-09-29.07 (V~16.8), UT 2014-09-22.110 (V~16.9), UT 2014-09-20.110 (V~17.0), and UT 2014-09-18.38 (V~17.2). We do not detect (V>17.1) the object in images taken on UT 2014-09-12.23 and before. An image obtained with the Swope 1-m telescope on UT 2014-09-29.22 confirms the discovery of the transient. This figure shows the 2014-09-29 Swope 1-m g-band confirmation image (left) and the archival DSS image (right). The red arrow has a length of 5" and indicates the position of the transient.

The position of ASASSN-14ig is approximately 1" from the center of the galaxy ESO 113-G032 (z=0.029, d=120 Mpc, via NED), giving an absolute V-band magnitude of approximately -18.8 (m-M=35.40, A_V=0.057). 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.