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ASAS-SN Discovery of a Probable Supernova in CGCG 212-036 NED01

ATel #6272; J. Brimacombe (Coral Towers Observatory), T. W.-S. Holoien, 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 26 Jun 2014; 03:19 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 quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a likely supernova in CGCG 212-036 NED01

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14de  10:40:39.33    +39:03:52.7       2014-06-23.29     16.4 

ASASSN-14de was discovered in images obtained 2014 UT June 23.29 at V~16.4 mag. We also detect the object in images obtained on June 20.25 (V~16.6), June 17.25 (V~16.6), June 14.26 (V~16.4), and June 10.26 (V~16.5), but we do not detect this object (V>17.0) in images taken on 2014 UT June 08.26 and before. An image obtained on UT June 25.19 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 3” and is centered on the ASAS-SN position of the transient.

The ASAS-SN position of ASASSN-14de is approximately 5.0” away from the core of CGCG 212-036 NED01 (z=0.029284, d=127 Mpc, via NED), giving an absolute V-band magnitude of approx. -19.2 (m-M=35.51, A_V=0.046, 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.