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ASAS-SN Discovery of A Bright Probable Supernova in GALEXASC J125413.02-073849.5

ATel #6744; 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)
on 24 Nov 2014; 17:38 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 #: 6766

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 GALEXASC J125413.02-073849.5:

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14kr  12:54:13.15   -07:38:57.46      2014-11-23.64    15.6 

ASASSN-14kr was discovered in images obtained on UT 2014-11-23.64 at V~15.6 mag. We also detect the object on UT 2014-11-20.65 (V~15.9). We do not detect (V>16.2) the object in images taken on UT 2014-08-09.96 and before, and do not have observations of the source position in the interim as the field has only recently become observable from behind the Sun. Images obtained on UT 2014-11-24.52 by J. Brimacombe with the RCOS 51-cm telescope in New Mexico and on UT 2014-11-24.63 with the LCOGT 1-m robotic telescope at McDonald Observatory confirm the discovery of the transient. This figure shows the archival DSS image of the host (left) and the J. Brimacombe confirmation image (right). The red circle has a radius of 5" and is centered on the position of the transient in the J. Brimacombe image.

The position of ASASSN-14kr is approximately 7.4" South and 1.0" East from the center of the galaxy GALEXASC J125413.02-073849.5, a galaxy with no available spectroscopic redshift in NED. Follow-up observations, particularly spectroscopy, 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.