Study for the mechanism of the gamma-ray emission from FSRQ objects and the extragalactic background light

• Project/Area Number: 25800105
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: SAITO Koji 東京大学, 宇宙線研究所, 研究員 (10645237)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 超高エネルギーガンマ線 / 活動銀河核 / 銀河系外背景光

Outline of Final Research Achievements

The extragalactic background light and the very high energy gamma-ray emission from cosmological distant objects such as Flat Spectrum Radio-loud Quasars (FSRQ) located at the redshift of z ~ 1 away from the earth have been studied.
Results from multiwavelength observations led by the imaging atmospheric Cherenkov telescope MAGIC on the FSRQ object PKS 1510-089 was published in the Astronomy and Astrophysics journal. Furthermore, a very high energy gamma-ray signal from two objects, a most distant object ever S3 0218+357 which have a redshift of z = 0.94 and H 1722+119 whose redshift is estimated to be >0.5, was discovered.

Research Products

• [Journal Article] MAGIC gamma-ray and multifrequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012 (2014)
  • Author(s): Aleksic, et al.
  • Journal Title: Astronomy & Astrophysics Volume: 569 Pages: 46-46
  • DOI: 10.1051/0004-6361/201423484
  • Peer Reviewed
• [Presentation] MAGIC報告40：FSRQ天体PKS 1510-089の多波長観測
  • Author(s): 齋藤浩二，井上進，折戸玲子，櫛田淳子，窪秀利，小谷一仁，今野裕介，齋藤隆之，高見一，手嶋政廣，遠山健，中嶋大輔，西嶋恭司，野田浩司，林田将明，他MAGIC Collaboration
  • Organizer: 日本物理学会
  • Place of Presentation: 高知大学
• [Presentation] MAGIC報告45：遠方ブレーザーH 1722+119の観測
  • Author(s): 齋藤浩二，井上進，折戸玲子，櫛田淳子，窪秀利，小谷一仁，今野裕介，齋藤隆之，高見一，手嶋政廣，遠山健，中嶋大輔，西嶋恭司，野田浩司，林田将明，他MAGIC Collaboration
  • Organizer: 日本物理学会
  • Place of Presentation: 東海大学(湘南キャンパス)
• [Presentation] MAGIC望遠鏡と同時多波長観測によるFSRQ天体PKS 1510-089の研究
  • Author(s): 齋藤浩二、井上進、林田将明、折戸玲子、櫛田淳子、小谷一仁、西嶋恭司、窪秀利、今野裕介、齋藤隆之、高見一、手嶋政廣、遠山健、中嶋大輔、野田浩司、他MAGIC Collaboration
  • Organizer: 日本天文学会
  • Place of Presentation: 東北大学
• [Presentation] MAGIC望遠鏡による遠方ブレーザーH 1722+119の観測
  • Author(s): 齋藤浩二、中嶋大輔、花畑義隆、林田将明、井上進、手嶋政廣、折戸玲子、櫛田淳子、小谷一仁、西嶋恭司、窪秀利、今野裕介、齋藤隆之、高見一、遠山健、野田浩司、他MAGIC Collaboration
  • Organizer: 日本天文学会
  • Place of Presentation: 国際基督教大学(東京都三鷹市)
• [Remarks] MAGIC-Japan website
  • URL: http://magic.scphys.kyoto-u.ac.jp