アキタヤ　ヒロシ   秋田谷　洋    所属   千葉工業大学  天文学研究センター 天文学研究センター    職種   上席研究員
言語種別	英語
発行・発表の年月	2013/04/25
形態種別	学術雑誌
標題	Photopolarimetric Monitoring of the Blazar BL Lac in the Optical and Near-Infrared Bands: Decay of the Long-Lived Component
執筆形態	共著
掲載誌名	Publications of the Astronomical Society of Japan
掲載区分	国外
出版社・発行元	Oxford University Press (OUP)
巻・号・頁	65(2),pp.35
著者・共著者	Kiyoshi Sakimoto, Makoto Uemura, Mahito Sasada, Koji S. Kawabata, Yasushi Fukazawa, Masayuki Yamanaka, Ryosuke Itoh, Takashi Ohsugi, Michitoshi Yoshida, Hiroshi Akitaya, Shuji Sato, Masaru Kino
概要	We report on the results of optical–near-infrared photopolarimetric observations of BL Lac conducted from 2008 to 2011. Our observations are consistent with past studies in which the behavior of the polarization of BL Lac could be understood with two components: short flares whose polarization angles randomly change, and a long-lived component. In addition, we detected a gradually decreasing trend in the total flux, the polarized flux, and the polarization degree without a large variation in the polarization angle from 2008 to mid-2009.
DOI	10.1093/pasj/65.2.35
ISSN	00046264
NAID	1360004234733845504