Hatena::Groupkanatatmp

KANATA ObsLog

2010-11-06

[] Spectroscopic Indentification of New Possible Supernova : Type IIn SN 2010jl

f:id:kanataobslog:20101106221826p:image

We performed the spectroscopic observation of a possible supernova in UGC 5189A at Nov. 11.8 UT. This supernova was discovered by Jack Newton and Tim Puckett at Nov. 11.206 UT (CBET 2532). We performed the follow up observations in order to clarify the spectroscopic type of this new object using HOWPol equipped with Kanata telescope. The spectrum exhibits the emission lines of H-alpha and H-beta at 4900 and 6600 A. These emission lines show the multiple features with broader (~18000 km/s) and narrower (<500 km/s) components. The spectra also exhibit weak emission lines of HeI at 5900 and 7100 A. These spectral porifles are well similar to those of extremely luminous Type IIn SN 2006tf (Smith et al. 2008). Similar report was done by Benetti et al. (CBET 2536). The extremely high luminosity would be not only originated from the synthesized 56Ni decay but also the interactions of the ejecta with circumstellar material (CSM). This object allow us to study a history of mass loss in its progenitor. We will continue the observations of extremely luminous Type IIn SN 2010jl.