We have performed the photometric observations of Type Ia SN 2009nr. Unfortunately, due to the bad weathers in Higashi-Hiroshima, the plotted data became sparse. We will continue the observations of SN 2009nr.
We have performed the extensive photometric observations of Type Ia SN 2009ig. The light curves are compared to a very normal SN Ia 2005cf (Wang et al. 2009) and an extremely luminous SN Ia 2009dc (Yamanaka et al. 2009). The B-band light curve clearly shows an excess from that of a normal SN Ia. The luminosity obtained in B-band even reached that of the extremely luminous SN 2009dc. On the other hand, light curve of V, R, I-bands indicate that the luminosity rather become similar to those of normal SN Ia 2005cf than those of SN 2009dc. We will perform observations of the peculiar SN Ia 2009ig until an observation limit of this season.
■ [dwarf nova] V455 And: high-speed photometry on 100117
We performed high-speed photometry of the dwarf nova, V455 And on 17 Jan 2010 with a time-resolution of 2 s. V455 And experienced a WZ Sge-type superoutburst in 2007. This object is also known as an intermediate polar, whose spin period of the white dwarf is 67 s. The figures show our preliminary results: the light curve (the upper panel) and power spectrum (the lower panel) in 17 Jan. The features of the light curve and power spectrum are almost same as those observed on 23 Sep 2009. The object is still slightly brighter than the quiescent state observed before the 2007 superoutburst. We will continue the observation of this object to find a possible change in the structure of the power spectrum.