Abstract

Based on observations with the new transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the types and found the redshifts for six new X-ray sources (four quasars and two galaxy clusters) detected by the SRG space observatory during the Lockman Hole observations at the eROSITA performance verification phase. We show that the TDS allows the spectra of objects \({\sim}20^{m}\) to be taken in 2 h of observations with a signal-to-noise ratio higher than 5 and a resolution \(R\sim 1500\). The types and redshifts of the objects determined from our spectroscopic observations agree well with the predictions based on photometric data using the SRGz automatic classification system.

中文翻译：

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SAI MSU高加索山天文台用2.5 m望远镜对SRG / eROSITA物体进行光谱分析

摘要

根据在SAI MSU高加索山天文台2.5米望远镜上使用新的瞬态双光束光谱仪（TDS）进行的观测，我们确定了类型并发现了六种新的X射线源的红移（四个类星体和两个SRG天文台在eROSITA性能验证阶段在Lockman Hole观测期间检测到了星系团）。我们证明了TDS允许在2小时的观察中获取对象\（{\ sim} 20 ^ {m} \）的光谱，信噪比高于5，分辨率为\（R \ sim 1500 \）。根据我们的光谱观察确定的物体的类型和红移与使用SRGz自动分类系统基于光度数据的预测非常吻合。