We have been observed SN 2009an since Mar. 1 2009. The preliminary photometric results is shown in above figure. The approximate magnitudes of comparison star is refereed from USNO A-2.0 catalog. The luminosity would be suffered from the reddening by host galaxy. The maximum day is roughly determined as Mar. 10 from the light curve. The delta_m15(B), most important parameter for the luminosity indicator of SNe Ia, will be determined from the B-band photometry for next 10 days. We will continue the photometric and spectroscopic observations.
■ [blazar] PKS 1502+106 : The high state of the polarization degree
The figure shows the light curve and the temporal variation of the object in V band. The amplitude of the magnitude of the object was about 1.8. The object has been recently brightened since JD 2454870. The polarization degree of the object was high, simultaneously.
The figure shows the light curve and the temporal variation of the polarization degree in V band. The polarization degree of the object was high until JD 2454865 (larger than 20 %). The polarization degree of the object, however, had been reduced since JD 2454880. In JD 2454890, the object was rapidly fading from V~14.8 to 15.7.