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ASAS-SN Discovery of A Probable Supernova Near NGC 6909

ATel #6329; K. Z. Stanek, C. S. Kochanek, A. B. Davis, T. W.-S. Holoien, B. J. Shappee, J. Jencson, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Universidad Diego Portales), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU), D. Szczygiel, G. Pojmanski (Warsaw University Observatory)
on 19 Jul 2014; 21:41 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 6330

During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the double 14-cm "Cassius" telescope in CTIO, Chile, we discovered a likely supernova near galaxy NGC 6909

Object        RA (J2000)    DEC (J2000)      Disc. UT Date   Disc. V mag  
ASASSN-14eb   20:27:25.070 -47:00:58.45      2014-07-19.34    16.2 
ASASSN-14eb was discovered in two Cassius images taken on UT 2014-07-19.34 at V~16.2 mag, but it was not detected (V>17.2) on UT 2014-07-17.21. This figure shows the ASAS-SN V-band reference image (top-left), the archival DSS image of the host (top-right), ASAS-SN non-detection on UT 2014-07-17.20 (bottom-left) and the discovery difference image on UT 2014-07-19.34 (bottom-right). The red circle has a radius of 10" and is centered on the ASAS-SN position of the transient.

The position of ASASSN-14eb is approximately 2.44 arcmin (projected distance 25.2 kpc) from the center of galaxy NGC 6909 (z=0.00927, luminosity distance d=36.2 Mpc, via NED), giving the transient an absolute V-band magnitude of approximately -16.7 (m-M=32.8, A_V=0.10). As ASASSN-14eb is likely a supernova caught early, 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.