论文标题
费米来源4FGL J1848.7-0129
A blazar candidate for the Fermi source 4FGL J1848.7-0129
论文作者
论文摘要
Fermi Source 4FGL J1848.7-0129自从首次检测以来，历史上一直与球形群集瞥见C01有关。尽管这种关联被广泛接受，因为它出现在最近的费米目录中，但考虑到多波长的证据以及最近发现在费米源区域中可变X射线源的发现，它值得重新审视。特别是，已经仔细检查了来自浦那（印度）巨型电表射电望远镜的低频无线电图，该图与Chandra的X射线数据重新分析一起，导致我们深入了解候选人，以与4FGL J1848.7-0129相关联。这导致发现了一个新的X射线变量点源与未报告的非热收音机发射器一致，它们都很好，在4FGL J1848.7-0129错误椭圆形内。我们分析并讨论了所有这些观察性事实，现在我们提出了新发现的Blazar候选人，是负责费米来源中伽马射线排放的最有前途的候选人。如果得到确认，此结果将设置瞥见C01或其伽马射线发射特性的毫秒脉冲星的数量。
The Fermi source 4FGL J1848.7-0129 has been historically related to the globular cluster GLIMPSE-C01 since its very first detection. Although this association is widely accepted, as it appears in the most recent Fermi catalog, it deserves to be revisited given the multi-wavelength evidences and the recent discovery of variable X-ray sources in the Fermi source region. In particular, low frequency radio maps from the Giant Metre Radio Telescope in Pune (India) have been carefully inspected which, together with X-ray data re-analysis from Chandra, lead us to get a deep insight into the candidates to be associated to 4FGL J1848.7-0129. This results in the discovery of a new X-ray variable point source coincident with an unreported non-thermal radio emitter, both of them well inside the 4FGL J1848.7-0129 error ellipse. We analyze and discuss all these observational facts, and we propose now a newly discovered blazar candidate as the most promising responsible for the gamma ray emission in the Fermi source. If confirmed, this result would set constrains on the number of millisecond pulsars in GLIMPSE-C01 or their gamma-ray emission properties.
