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arXiv 1503.01364astro-ph.HE
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费米大天区望远镜的量热分析

Calorimeter-only analysis of the Fermi Large Area Telescope

M. Takahashi, R. Caputo, D. Paneque, C. Sgrò

摘要:

在几十GeV以上,费米大面积望远镜(LAT)的伽马射线观测可能会受到统计不确定性的影响,这是由于源的低通量和有限的接受度。我们正在开发一个新的事件类,它可以提高接受度:“仅热量计(CalOnly)”事件类。LAT有三个探测器:跟踪器、量热计和反符合探测器。虽然传统事件类需要来自跟踪器的信息,但CalOnly事件类旨在当没有可用的跟踪器信息时使用。虽然CalOnly事件与具有可用跟踪器信息的LAT事件相比具有较差的角分辨率和较差的信号/背景分离,但它们可以将仪器接受度提高到几十GeV以上,其中费米LAT的性能受到低光子统计的限制。在这些诉讼中,我们解释的概念,并报告这种新的分析的一些初步特点。

英文摘要:

Above tens of GeV, gamma-ray observations with the Fermi Large Area Telescope (LAT) can be dominated by statistical uncertainties due to the low flux of sources and the limited acceptance. We are developing a new event class which can improve the acceptance: the "Calorimeter-only (CalOnly)" event class. The LAT has three detectors: the tracker, the calorimeter, and the anti-coincidence detector. While the conventional event classes require information from the tracker, the CalOnly event class is meant to be used when there is no usable tracker information. Although CalOnly events have poor angular resolution and a worse signal/background separation compared to those LAT events with usable tracker information, they can increase the instrument acceptance above few tens of GeV, where the performance of Fermi-LAT is limited by low photon statistics. In these proceedings we explain the concept and report some preliminary characteristics of this novel analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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