Hatena::Groupkanatatmp

KANATA ObsLog

2009-02-23

[] V5579 Sgr : Recovering in optical

f:id:kanataobslog:20090224031057p:image

We observed V5579 Sgr on Sep. 21 in V- and H-band. The nova formed the dust just after the maximum and faded in optical bands.

Recently, the object has, gradually, recovered in V and faded in H due to decrease of the dust opacity.

[] AO 0235+164 :update the data

f:id:kanataobslog:20090223234458p:image

We update the data of AO 0235+164.

[] 3C 371 : update the data

f:id:kanataobslog:20090223225943p:image

The figure shows that the lightcurve and Polarization degree in V band of the object.

[] 3C 279 : decreasing of the Polarization degree

f:id:kanataobslog:20090223225413p:image

The figure shows that lightcurve and Polarization degree in V band of the object.

This object has been decreasing of the Polarization degree in these days.

[] 3C 273 : update the data

f:id:kanataobslog:20090223223958p:image

We have been observing 3C 273 since 11 December 2008.

The figure shows that the lightcurve and polarization degree in V band of the object.

The object has a low polarization degree.

[] 3C 66A : update the data

f:id:kanataobslog:20090223210759p:image

We update the data of 3C 66A.The figure shows that the lightcurve and polarization degree in V band.

The polarization of the object has decreased these days since we have been observed.

[] Start of the optical observations of SN 2009af

f:id:kanataobslog:20090223082457p:image

We started the optical observations of SN 2009af. SN 2009af was discovered in nearby galaxy UGC1551 by G,Cortini, Italy (CBET1697). Thereafter, the spectroscopic observations were performed by S, Ciroi et al. The spectrum showed the typical characteristics of Type II supernova. We also obtained optical several spectra using 1.5m-KANATA telescope with TRISPEC in Feb. 21 2009. We combined to the average spectrum using the "scombine" task in IRAF. The spectrum showed the strong P-Cyg profile of H-alpha. We compared the spectrum of SN 2009af with that of Type IIb SN 1993J around maximum light. The two spectra showed similar profile. SN 2009af might be striped-envelope SN, as Type Ib/Ic/IIb. We will continue the observations of SN 2009af.