ASAS-SN Discovery of A Probable Supernova in IC 0188
ATel #6277; T. W.-S. Holoien (Ohio State), J. Brimacombe (Coral Towers Observatory), K. Z. Stanek, B. J. Shappee, A. B. Davis, C. S. Kochanek, J. Jencson, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Princeton/Diego Portales), D. Bersier (LJMU), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 28 Jun 2014; 15:18 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 #: 6293
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, likely a supernova, in IC 0188:
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14di 02:01:46.39 +26:32:41.96 2014-06-27.59 16.4
ASASSN-14di was discovered in images obtained 2014 UT June 27.59 at V~16.4 mag. We also detect the object in images obtained 2014 UT June 24.61 (V~16.4), 2014 UT June 19.60 (V~16.6), and 2014 UT June 16.60 (V~16.5), but we do not detect (V>17.7) the object in images taken on 2014 UT Jan. 19.24 and before. An image obtained on UT June 28.43 with the RCOS 51-cm telescope in New Mexico confirms the discovery of the transient. This figure shows the archival SDSS g-band image of the host galaxy (left) and the RCOS confirmation image (right). The red circle has a radius of 5" and is centered on the ASAS-SN position of the transient.
The ASAS-SN position of ASASSN-14di is approximately 7.0" South and 1.5" East from the center of IC 0188 (z=0.016708, d=65.8 Mpc, via NED), giving an absolute V-band magnitude of approx. -17.9 (m-M=34.09, A_V=0.20, Schlafly & Finkbeiner 2011). 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.
