On the identification of the Fermi/LAT source 0FGL J2001.0+4352 with a BL Lac
On the identification of the Fermi/LAT source 0FGL J2001.0+4352 with a BL Lac
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关于 Fermi/LAT 源 0FGL J2001.0 4352 与 BL Lac 的识别
DOI：
10.1111/j.1745-3933.2009.00683.x
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发表时间：
2009
影响因子：
--
通讯作者：
P. Ubertini
中科院分区：
文献类型：
--
作者：
L. Bassani;R. Landi;N. Masetti;P. Parisi;A. Bazzano;P. Ubertini
本文报道了费米亮源表中γ源0 FGL J20001.0+4352的鉴别结果。该天体的观测通量为（7.8 ± 1.2）× 10−9 ph cm−2 s−1，位于银道面附近，在1-100 GeV之间，与任何先前已知的高能源都没有关联。我们使用XMM-牛顿和Swift/X射线望远镜（XRT）的存档数据，以角秒的精度定位了这个GeV辐射源的X射线对应物，并描述了它的X射线特性：该源是明亮的（0.2-12 keV的通量为1.9 × 10−12 erg cm−2 s−1），可变的（因子为102），具有陡峭的幂律谱（r = 2.7）。它与一个射电明亮（在8.4 GHz时为200 mJy）和平谱天体[NASA/IPAC河外星系数据库（NED）中的MG 4 J200112+4352]相吻合。宽波段光学测光的这个来源也表明在这个波段的变化，而光谱的后续观察提供了第一个源分类为BL Lac对象。源SED，以及整体特征和光学分类，指向高频峰值blazar识别为0 FGL J2001.0+4352。
We report on the identification of the gamma-ray source 0FGL J20001.0+4352 listed in the Fermi bright source catalogue. This object, which has an observed 1–100 GeV flux of (7.8 ± 1.2) × 10−9 ph cm−2 s−1 and is located close to the Galactic plane, is not associated with any previously known high-energy source. We use archival XMM–Newton and Swift/X-ray Telescope (XRT) data to localize with arcsec accuracy the X-ray counterpart of this GeV emitter and to characterize its X-ray properties: the source is bright (the 0.2–12 keV flux is 1.9 × 10−12 erg cm−2 s−1), variable (by a factor of ∼2) and with a steep power-law spectrum (Γ= 2.7). It coincides with a radio bright (∼200 mJy at 8.4 GHz) and flat spectrum object [MG4 J200112+4352 in NASA/IPAC Extragalactic Database (NED)]. Broad-band optical photometry of this source suggests variability also in this waveband, while a spectroscopic follow-up observation provides the first source classification as a BL Lac object. The source SED, as well as the overall characteristics and optical classification, point to a high frequency peaked blazar identification for 0FGL J2001.0+4352.
影响因子：
4.9
作者：
Gehrels, N;Chincarini, G;Zhang, WW
通讯作者：
Zhang, WW