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arXiv 1502.02380astro-ph.HE
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费米LAT探测两个高银河纬度gamma-ray源,费米J1049 .7+0435和J1103 .2+1145

Fermi LAT detection of two high Galactic latitude gamma-ray sources, Fermi J1049.7+0435 and J1103.2+1145

Masaki Nishimichi, Takeshi Okuda, Masaki Mori, Philip G. Edwards, Jamie Stevens

摘要:

在寻找NGC 3628(Arp 317)的γ射线辐射的过程中,发现了两个新的未经确认的γ射线源:Fermi J1049.7+0435和J1103.2+1145 \cite{ATel}。这些探测是在2008年8月5日至2012年10月27日期间,费米伽马射线太空望远镜上的大面积望远镜(LAT)在100,MeV至300,GeV波段的数据中进行的。两者都不符合2FGL目录\cite{Nolan2012}中列出的任何源。费米J 1049.7 +0435位于银河系坐标$(l,b) = (245.34^\circ, 53.27^\circ)$,$(α_{J2000}, δ_{J2000}) = (162.43^\circ, 4.60^\circ)$。费米J 1103.2 +1145位于银河系坐标$(l,b) = (238.85^\circ, 60.33^\circ)$,$(α_{J2000},δ_{J2000})= (165.81^\circ, 11.75^\circ)$。可能的无线电对应物被发现的两个源,这表明平坦的无线电频谱类似于其他费米LAT检测AGN,并讨论了它们的识别。这些识别得到了澳大利亚望远镜紧凑阵列在2013年和2014年几个时期的快照观测的支持,

英文摘要:

During a search for gamma-ray emission from NGC 3628 (Arp 317), two new unidentified gamma-ray sources, Fermi J1049.7+0435 and J1103.2+1145 have been discovered \cite{ATel}. The detections are made in data from the Large Area Telescope (LAT), on board the Fermi Gamma-ray Space Telescope, in the 100\,MeV to 300\,GeV band during the period between 2008 August 5 and 2012 October 27. Neither is coincident with any source listed in the 2FGL catalogue \cite{Nolan2012}. Fermi J1049.7+0435 is at Galactic coordinates $(l,b) = (245.34^\circ, 53.27^\circ)$, $(α_{J2000}, δ_{J2000}) = (162.43^\circ, 4.60^\circ)$. Fermi J1103.2+1145 is at Galactic coordinates $(l,b) = (238.85^\circ, 60.33^\circ)$, $(α_{J2000},δ_{J2000})= (165.81^\circ, 11.75^\circ)$. Possible radio counterparts are found for both sources, which show flat radio spectra similar to other Fermi LAT detected AGN, and their identifications are discussed. These identification have been supoorted by snap-shot observations with the Australia Telescope Compact Array at several epochs in 2013 and 2014,

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