We have performed the photometric observations of Type Ia SN 2010B since 2010 Jan.14 UT. SN 2010B was discovered of 14.4 mag at NGC 5370 by Tsuboi, M in Hiroshima (CBET 2115). Thereafter, the spectroscopic observations of this object was performed by Kinugasa, K. et al. reported in CBET 2117. This object was identified as a Type Ia SN before B-band maximum light. Unfortunately, since we obtained the photometric points an week after the maximum, the light curve already show the decline of the luminosity. The decline rate of the B-band light curve seems to be faster than that of a normal SN Ia. We will continue the observations of SN 2010B.
■ Optical transient in UGC 2773 : update
We update the light curve of the optical transient of UGC 2773.
We update the light curve of Type IIP SN 2009ls. The light curve of this object is well corresponding to that of a Type IIP SN. We will continue the observations of SN 2009ls.