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JHKs photometry of the supernova candidate detected by the VVV Survey

ATel #10163; H. Kuncarayakti, S. Mattila, T. Kangas (Turku), A. Nyholm, C. Barbarino (OKC), J. P. Anderson (ESO), L. Galbany (Pitt), K. Maguire, S. J. Smartt, E. Kankare, K. W. Smith, D. Young (QUB), C. Inserra, M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann)
on 10 Mar 2017; 18:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Hanindyo Kuncarayakti (kuncarayakti@gmail.com)

Subjects: Infra-Red, Supernovae, Transient

The VVV survey reported the discovery of an infrared-bright supernova candidate that peaked in 2013 (ATEL #10140). In 2017 March 7.25 UT, PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40, http://www.pessto.org) observed the transient with the ESO New Technology Telescope at La Silla equipped with SOFI. The following NIR photometry of the transient is obtained:

J = 18.43 +/- 0.07 mag
H = 17.31 +/- 0.06 mag
Ks = 16.44 +/- 0.07 mag

The corresponding colours are (J-Ks) = 1.99 mag, (H-Ks) = 0.87 mag, (J-H) = 1.12 mag, which show little change relative to the 2015 July colours. The observed Ks magnitude implies that the supernova candidate is currently at similar brightness compared to the previous data points obtained around 600 days ago (K = 16.17 +/- 0.08 mag).