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arXiv 1606.01466astro-ph.HE
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射电宁静弱发射线类星体IV的夜间光变

Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-IV

Parveen Kumar, Hum Chand, Gopal-Krishna

摘要:

我们报告我们的计划,以寻找无线电安静BL紫胶候选人使用夜间光学变化(INOV)作为探针的扩展。目前的INOV观测涵盖了一组定义明确的代表性的10个“无线电安静弱发射线类星体”(RQWLQ),这些类星体是从斯隆数字巡天(数据发布7)新公布的46个此类源中选出的。10个RQWLQs的夜间CCD监测进行了18次,持续至少3.5小时。对于每个会话,差分光变曲线(DLCs)的目标RQWLQ推导出相对于两个稳定的比较星同时监测。将这些新数据与我们已经公布的30次监测的15个RQWLQ的数据相结合,我们估计RQWLQ的INOV占空比为$\sim 3\%$,这似乎与BL Lac不一致。然而,观察到的INOV事件(仅发生在两个会话中)很强(分数变化幅度$ψ>$ 10\%),因此类似于blazar。我们简要地指出了RQWLQs的估计INOV占空比的明显上升的前景,相对温和的增加,用于监测这些相当微弱的对象的灵敏度。

英文摘要:

We report an extension of our program to search for radio-quiet BL Lac candidates using intra-night optical variability (INOV) as a probe. The present INOV observations cover a well-defined representative set of 10 `radio-quiet weak-emission-line quasars' (RQWLQs), selected from a newly published sample of 46 such sources, derived from the Sloan Digital Sky Survey (Data release 7). Intra-night CCD monitoring of the 10 RQWLQs was carried out in 18 sessions lasting at least 3.5 hours. For each session, differential light curves (DLCs) of the target RQWLQ were derived relative to two steady comparison stars monitored simultaneously. Combining these new data with those already published by us for 15 RQWLQs monitored in 30 sessions, we estimate an INOV duty cycle of $\sim 3\%$ for the RQWLQs, which appears inconsistent with BL Lacs. However, the observed INOV events (which occurred in just two of the sessions) are strong (with a fractional variability amplitude $ψ>$ 10\%), hence blazar-like. We briefly point out the prospects of an appreciable rise in the estimated INOV duty cycle for RQWLQs with a relatively modest increase in sensitivity for monitoring these rather faint objects.

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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