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ASAS-SN Discovery of A Probable Supernova in ESO 462-G009

ATel #6579; L. A.G. Monard (Klein Karoo Observatory), 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), J. Hissong (Columbus Astronomical Society), S. Kiyota (Variable Star Observers League in Japan), B. Nicholls (Mt. Vernon Obs., New Zealand), J. Nicolas (Groupe SNAUDE, France), W. Wiethoff (University of Minnesota, Duluth)
on 14 Oct 2014; 18:21 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 #: 6580

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 ESO 462-G009:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14iz  20:21:49.84    -31:17:06.78      2014-10-14.06    17.0 

ASASSN-14iz was discovered in images obtained on UT 2014-10-14.06 at V~17.0 mag. We also detect the object in images obtained on UT 2014-10-13.04 (V~16.7) and UT 2014-10-05.07 (V~16.4). We do not detect (V>17.2) the object in images taken on UT 2014-09-27.03 and before. Images obtained by L.A.G. Monard on 2014-10-13.91 with an unfiltered CCD (ST8-XME) on a 35-cm Meade RCX400 telescope f/8 at Klein Karoo Observatory, by J. Brimacombe on UT 2014-10-14.21 with the RCOS 41-cm telescope near Siding Spring Observatory, and by J. Brimacombe on UT 2014-10-14.39 with the CDK 43-cm telescope at Savannah Skies Observatory confirm the discovery of the transient. This figure shows the archival DSS image of the host (left) and the J. Brimacombe 2014-10-14.39 confirmation image (right). The red circle has a radius of 3.0" and is centered on the position of the transient in the J. Brimacombe image.

The position of ASASSN-14iz is approximately 16.3" North and 22.1" West from the center of the galaxy ESO 462-G009 (z=0.019277, d=77.4 Mpc, via NED), giving an absolute V-band magnitude of approximately -17.6 (m-M=34.44, A_V=0.189). 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.