Hatena::Groupkanatatmp

KANATA ObsLog

2009-04-29

[] GRS 1915+105 : H-band light curve

f:id:kanataobslog:20090430010814p:image

We have started the 2009-season observation of a black hole X-ray binary GRS 1915+105 in near-infrared bands. The figure shows the H-band light curve from 2008(red dots) to 2009(blue dots). Our recent observations indicates that the object is in the low state in the near-infrared regime.

[] V1280 Sco : light curve update

f:id:kanataobslog:20090430010014p:image

The optical fading trend continues accompanied with the reddening.

[] SN 2009dc : Update

f:id:kanataobslog:20090429230355p:image

We update the light curve of peculiar Type Ia SN 2009dc. The I-band luminosity reached maximum light later than bluer band luminosity. Normally, the I-band first maximum come to earlier than the other bluer band maximum.