TELAMON：使用埃菲尔斯贝格望远镜监测具有甚高能天体粒子发射的活动星系核喷流——I. 项目描述与样本表征
TELAMON: Effelsberg monitoring of AGN jets with very-high-energy astroparticle emission -- I. Program description and sample characterization
AI总结：
本文介绍TELAMON项目，利用埃菲尔斯贝格100米望远镜监测北半球59个TeV耀变体的射电谱，表征其流量密度和谱指数，并与GeV选择样本比较，为后续光变与相关性分析奠定基础。
摘要：
研究目标。我们介绍TELAMON项目，该项目使用埃菲尔斯贝格100米望远镜监测天体粒子物理学中受到重点关注的活动星系核（AGN）的射电谱，具体包括TeV耀变体和候选的中微子关联AGN。在此，我们展示并表征我们的主要TeV探测耀变体样本。方法。我们分析了2020年8月至2023年2月间约2.5年首批观测的数据样本，频率范围为14 GHz至45 GHz。在这一试点阶段，我们观测了观测时已知的北半球（即赤纬>0°）全部59个TeV探测耀变体。我们讨论了所有TELAMON数据所使用的基本数据缩减和校准流程，并引入了一种子带平均方法，用于计算样本中源的平均光变曲线。结果。我们样本中的TeV选择源在20 mm处的中值流量密度为0.12 Jy，在14 mm处为0.20 Jy，在7 mm处为0.60 Jy。大多数源的谱与平坦射电谱一致，我们发现中值谱指数（$S(\nu)\propto\nu^\alpha$）为$\alpha=-0.11$。我们在流量密度和谱指数方面的结果与先前对TeV选择耀变体的研究一致。与GeV选择的F-GAMMA样本相比，TELAMON源在射电波段显著更暗。这与耀变体的双峰谱在TeV发射体（尤其是高同步峰BL Lac型天体）中向更高频率移动一致，从而导致较低的射电流量密度。我们的TeV选择耀变体样本的谱指数分布与GeV选择的F-GAMMA样本没有显著差异。此外，我们提出了一种策略，用于跟踪样本中源的光变曲线演化，以供未来的变化性和相关性分析使用。
英文摘要：
Aims. We introduce the TELAMON program which is using the Effelsberg 100-m telescope to monitor the radio spectra of active galactic nuclei (AGN) under scrutiny in astroparticle physics, specifically TeV blazars and candidate neutrino-associated AGN. Here, we present and characterize our main sample of TeV-detected blazars. Methods. We analyze the data sample from the first ~2.5 years of observations between August 2020 and February 2023 in the range from 14 GHz to 45 GHz. During this pilot phase, we have observed all 59 TeV-detected blazars in the Northern Hemisphere (i.e., Dec. >0°) known at the time of observation. We discuss the basic data reduction and calibration procedures used for all TELAMON data and introduce a sub-band averaging method used to calculate average light curves for the sources in our sample. Results. The TeV-selected sources in our sample exhibit a median flux density of 0.12 Jy at 20 mm, 0.20 Jy at 14 mm and 0.60 Jy at 7 mm. The spectrum for most of the sources is consistent with a flat radio spectrum and we find a median spectral index ($S(ν)\proptoν^α$) of $α=-0.11$. Our results on flux density and spectral index are consistent with previous studies of TeV-selected blazars. Compared to the GeV-selected F-GAMMA sample, TELAMON sources are significantly fainter in the radio band. This is consistent with the double-humped spectrum of blazars being shifted towards higher frequencies for TeV-emitters (in particular for high-synchrotron peaked BL Lac type objects), which results in a lower radio flux density. The spectral index distribution of our TeV-selected blazar sample is not significantly different from the GeV-selected F-GAMMA sample. Moreover, we present a strategy to track the light curve evolution of sources in our sample for future variability and correlation 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。
