GCN Circular 21738
M. Im, C. Choi, G. Lim, J. Kim, H. M. Lee (SNU), M. J. Kim, H. J. Lee (KASI) on behalf of the KU collaboration At 2017-08-28 11:00 (UT), we continued the observation of MASTER OTJ033744.97+723159.0 near NGC 1343 (Lipunov et al. GCN 21719, 21720) with the SQUEAN instrument on the McDonald Observatory���s 2.1m telescope. AB magnitudes before and after the Galactic extinction correction are given below. Before | Extinction | After g 16.97 1.125 15.85 r 16.49 0.778 15.71 i 16.56 0.578 15.98 The object has brightened by ~0.2 mag in one day and stayed blue in r-i but has a redder color in g-r (c.f. Lipunov et al. GCN 21736). The brightening is consistent with the report that this is a type IIb SN before maximum (Jonker et al. GCN 21737).