ASAS-SN Discovery of A New Transient Near 2MASX J05230801-6308188
ATel #6768; 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), S. Kiyota (Variable Star Observers League in Japan), L. A.G. Monard (Klein Karoo Observatory), B. Nicholls (Mt. Vernon Obs., New Zealand)
on 29 Nov 2014; 17:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Thomas Holoien (tholoien@astronomy.ohio-state.edu)
Subjects: Optical, Supernovae, Transient
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, possibly a supernova, near the galaxy 2MASX J05230801-6308188:
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14ky 05:23:16.08 -63:07:28.87 2014-11-29.20 16.2
ASASSN-14ky was discovered in images obtained on UT 2014-11-29.20 at V~16.2 mag. We do not detect (V>17.1) the object in images taken on UT 2014-11-28.18 and before. An image obtained by J. Brimacombe on UT 2014-11-29.54 with the CDK 43-cm telescope at Savannah Skies Observatory confirms 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-14ky is approximately 49.9" North and 54.4" East from the center of the galaxy 2MASX J05230801-6308188 (z=0.025421, d=107 Mpc, via NED). If this is indeed a supernova associated with this galaxy, this would give it an absolute V-band magnitude of approximately -19.1 (m-M=35.15, A_V=0.135). However, given the magnitude and location of the source, a cataclysmic variable outburst is also a possible explanation. Follow-up observations, especially 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.
