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ASAS-SN Discovery of A Probable Supernova in PGC 059030

ATel #7163; J. M. Fernandez (Observatory Inmaculada del Molino), 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), G. Krannich (Roof Observatory Kaufering), S. Kiyota (Variable Star Observers League in Japan), B. Nicholls (Mt. Vernon Obs., New Zealand), W. Wiethoff (University of Minnesota, Duluth)
on 2 Mar 2015; 15:23 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 #: 7219

During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a new transient source, most likely a supernova, in the galaxy PGC 059030:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-15ed  16:48:25.16   +50:59:30.72      2015-03-01.59    17.1 

ASASSN-15ed was discovered in images obtained on UT 2015-03-01.59 at V~17.1 mag. We do not detect (V>17.6) the object in images taken on UT 2015-02-25.57 and before. An image obtained by J. M Fernandez on UT 2015-03-02.21 with a 20-cm Celestron C8 telescope at Observatory Inmaculada del Molino in Osuna, Spain confirms the discovery of the transient. This figure shows the archival SDSS g-band image of the host (left) and the J. M. Fernandez confirmation image (right). The red circle has a radius of 4.0" and is centered on the position of the transient in the J. M. Fernandez image.

The position of ASASSN-15ed is approximately 4.8" South and 1.0" West from the center of the galaxy PGC 059030, a spiral galaxy with no spectroscopic redshift available in NED. (See the information page here.) Follow-up observations, particularly spectroscopy, 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.