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ASAS-SN Discovery of A Supernova in SDSS J235509.00+101252.9

ATel #6824; J. Brimacombe (Coral Towers Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables), 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), Subo Dong(KIAA-PKU), P. R. Wozniak (LANL), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Jose, Zhen Guo, Feng Long, G. Herczeg (KIAA), S. Kiyota (Variable Star Observers League in Japan), B. Nicholls (Mt. Vernon Obs., New Zealand), J. Nicolas (Groupe SNAUDE, France)
on 15 Dec 2014; 20:11 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 #: 6826

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 supernova in the galaxy SDSS J235509.00+101252.9:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14ma  23:55:09.129   +10:12:54.21      2014-12-13.27    16.9 

ASASSN-14ma was discovered in images obtained on UT 2014-12-13.27 at V~16.9 mag. We also detect the object in images obtained on UT 2014-12-15.27 (V~17.2), UT 2014-12-11.28 (V~17.2), and UT 2014-12-10.29 (V~16.9) and marginally detect the object in images obtained on UT 2014-12-14.28 and UT 2014-12-12.28. We do not detect (V>16.9) the object in images taken on UT 2014-12-08.28 and before. Images obtained by J. Brimacombe on UT 2014-12-14.56 with the RCOS 51-cm telescope in New Mexico, by E. Conseil on UT 2014-12-14.91 using a 0.35m f/11 Schmidt-Cassegrain + ST-10XME (Kodak KAF-3200E CCD) from Slooh Space robotic telescope T2 at Mt Teide, Canary Islands,and on UT 2014-12-15.18 with the LCOGT 1-m robotic telescope at McDonald Observatory confirm the discovery of the transient. This figure shows the archival SDSS g-band image of the host (left) and the E. Conseil 2014-12-14 confirmation image (right). The red circle has a radius of 3" and is centered on the position of the transient in the E. Conseil image.

The position of ASASSN-14ma is approximately 1.3" North and 1.8" East from the center of the galaxy SDSS J235509.00+101252.9, a galaxy with no redshift listed in NED. (See the SDSS page here.) 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.