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NIR photometry of SNhunt 275

ATel #7543; Noel Richardson, Etienne Artigau (Univ de Montreal)
on 20 May 2015; 23:13 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Noel Richardson (richardson@astro.umontreal.ca)

Subjects: Infra-Red, Star, Supernovae, Transient

SNhunt 275 (PSN J09093496+3307204) appears to be behaving similarly to SN 2009ip with an eruptive mass-loss event followed by a supernova explosion. We obtained a few epochs of NIR photometry using the Observatoire du Mont Megantic 1.6 m telescope and the CPAPIR instrument (Artigau et al. 2004, SPIE, 5492, 1479). We are reprocessing the data obtained during the eruptive state in February, but have now confirmed the rise in magnitude reported in ATel #7541, ATel #7517, and ATel #7514. During a short observation, we obtained an observed J-band magnitude of 14.984 +/- 0.067 on MJD 57162.5819989. Photometric observations in both J and K will continue to follow this transient as long as possible this observing season. This is consistent with the hypothesis that SNhunt 275 has transitioned to a Type II supernova.

Transient Image