| 翻訳と辞書 |
3C 454.3
3C 454.3 is a blazar (a type of quasar with a jet oriented toward Earth) located away from the galactic plane. It is one of the brightest gamma ray sources in the sky. It has the brightest BLAZAR gamma ray flare recorded, twice as bright as the Vela pulsar in our Milky Way galaxy. It also flares at radio and visible wavelengths, in red light, the blazar brightened by more than 2.5 times to magnitude 13.7, and is very bright at high radio frequencies.
It appears in Pegasus, near Alpha Pegasi (Markab). It has been known to occasionally outburst, brightening to a peak apparent magnitude of 13.4 in June 2014.〔(【引用サイトリンク】url=http://www.aavso.org/lcg/plot?auid=000-BDC-612&starname=3C+454.3&lastdays=30&start=06/15/2014&stop=&obscode=&obscode_symbol=2&obstotals=yes&calendar=calendar&forcetics=&grid=on&visual=on&uband=on&bband=on&v=on&pointsize=1&width=800&height=450&mag1=&mag2=&mean=&vmean= )〕
== History ==
In July and August 2007, the gamma-ray blazar 3C 454.3 flared to near-historic levels, only two years after its record-breaking 2005 optical flare. Luckily, Spitzer Space Telescope and Chandra X-ray Observatory were already scheduled for simultaneous observations. Swift, RXTE and the new gamma-ray AGILE spacecraft responded to this target of opportunity, and were joined by observatories around the world.
The Fermi Large Area Telescope AGN science group started a multiwavelength campaign for blazar 3C454.3 (2251+158), in July and continuing through August 2007. This Ad Hoc Intensive Campaign (AIC) was prompted by brightening in the radio, optical and X-ray.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「3C 454.3」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|