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ASAS-SN Discovery of a Likely Supernova in MCG+06-29-001

ATel #6112; B. J. Shappee (Ohio State), J. Brimacombe (Coral Towers Observatory), K. Z. Stanek, T. W-S. Holoien, C. S. Kochanek, J. Jencson, U. Basu, B. Davis, J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), D. Bersier (LJMU)
on 3 May 2014; 01:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Benjamin Shappee (shappee@astronomy.ohio-state.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 6113

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, probably a supernova, in the outskirts of MCG+06-29-001

Object       RA (J2000)   DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14as  12:57:33.9   +35:31:34.0       2014-05-01.37      16.9 

ASASSN-14as was discovered in images obtained 2014 UT May 1.37 at V~16.9 mag. We do not detect (V<17.0) this object in images taken on 2014 UT Apr. 23.56 and before. Images obtained on UT May. 2.37 with the LCOGT 1-m robotic telescope at McDonald Observatory and on UT May 2.26 with the RCOS 51-cm telescope in New Mexico (obtained by J. Brimacombe) confirm the discovery of the new transient. This figure shows the ASAS-SN reference image (top left), archival SDSS g-band image (top right), ASAS-SN discovery subtraction image (bottom left), and LCOGT confirmation image (bottom right). The red circle has a radius of 5.0" at the position of the SN candidate derived from the LCOGT image.

The transient is approximately 6.5" North and 4.9" East of the core of MCG+06-29-001 (z=0.03744, d=162 Mpc, via NED), which would give it an absolute V mag of approx. -19.1 (m-M=36.04, A_V=0.039, 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.