Hatena::Groupkanatatmp

KANATA ObsLog

2009-03-15

[] SN 2009an: The light curve has already been a week after maximum.

f:id:kanataobslog:20090316003012p:image

f:id:kanataobslog:20090316003011p:image

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.

[] PKS 1502+106 : The high state of the polarization degree

f:id:kanataobslog:20090315235949p:image

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.

[] 3C 279 : the brightness was decline

f:id:kanataobslog:20090315234923p:image

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.