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ASAS-SN Discovery of a Probable Supernova in 2MASX J02183825+3336556

ATel #6267; 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), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 24 Jun 2014; 20:20 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 #: 6284

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 2MASX J02183825+3336556

Object       RA (J2000)     DEC (J2000)      Disc. UT Date   Disc. V mag 
ASASSN-14dc  2:18:37.82    +33:37:01.7       2014-06-24.61     15.8 

ASASSN-14dc was discovered in images obtained 2014 UT June 24.61 at V~15.8 mag in two separate ASAS-SN cameras. We also detect the object in images obtained on June 19.6 (V~16.1), but we do not detect this object (V>16.6) in images taken on 2014 UT Feb. 12.28 and before. This figure shows the ASAS-SN reference image (left), ASAS-SN June 24 discovery subtraction image (middle), and archival DSS 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-14dc is approximately 5.7" North and 4.8" East from the core of 2MASX J02183825+3336556, a dwarf galaxy with no redshift (via NED), and it is possibly brightening. 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.