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A New Luminous Outburst from SN 2009ip

ATel #4334; A. J. Drake (Caltech); S. Howerton (Arkansas City, KS); R. McNaught (ANU); S. G. Djorgovski, A. A. Mahabal, M. J. Graham, R. Williams (Caltech); J. Prieto (Princeton); M. Catelan (PUC Chile); E. Christensen, S. Larson (UA/LPL)
on 24 Aug 2012; 21:35 UT
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)

Subjects: Optical, Supernovae, Transient, Variables

Referred to by ATel #: 4338, 4412, 4423, 4427, 4430, 4435, 4439

Further to Drake et al. (2010, Atel#2897), we report the discovery of a new bright outburst from spectroscopically confirmed LBV (Supernova Impostor) SN 2009ip (Maza et al. 2009; CBET#1928, Berger et al. 2009, ATEL#2184; Smith et al. 2010; Foley et al. 2011) in images taken by the Siding Spring Survey (SSS).

During the normal operation of the CRTS SN Hunt project, an outburst of SN 2009ip was discovered in subtracted images of NGC 7259 taken on 2012 July 24th UT. In further observations taken on August 14th the source was found to have brightened to V=16.8(0.1). This is the highest state observed in SSS data since it was first observed 2005. Additional SSS observations taken on Aug 16th and Aug 19th show the source remaining at similar brightness (V~16.8 +/- 0.1). Based on the distance to host galaxy NGC 7259 (m-M =31.55; NED), the SSS photometry suggests that absolute magnitude of SN 2009ip is currently Mv < -14.5.

Given the current very high state of this LBV, we request spectroscopic follow-up to determine the nature of this outburst.