标题： ROSAT 北天全天巡天中的射电明亮活动星系。 I. 射电识别 显示英文标题

标题： Radio-loud active galaxies in the northern ROSAT All-Sky Survey. I. Radio identifications

摘要： 我们展示了针对在绿岸（Green Bank, GB）5 GHz射电星表和ROSAT全天巡天（RASS）中发现的2127个射电和X射线辐射源的5 GHz高分辨率甚大天线阵（VLA）观测结果。我们报告了核通量密度和位置，其精度达到±0.5角秒。结合绿岸总射电发射的测量值，我们推导出样本中目标的核-瓣比，并讨论它们相对于射电星系和BL Lacerate天体样本的核心优势度。我们的结果显示ROSAT/绿岸（RGB）样本大约比射电星系样本核心优势度高出一个数量级，但比高度束状的BL Lacerate天体样本低超过一个数量级。使用简单的束状模型表明，RGB目录中的典型目标表现出束状射电发射，并且以适度的角度（θ~25-30度）朝向视线方向。X射线发射的起源则不那么明确；数据与各向异性未束状或适度束状的X射线分量一致。 显示英文摘要

摘要： We present 5 GHz high resolution VLA observations of 2,127 radio- and X-ray-emitting sources found in both the Green Bank (GB) 5 GHz radio catalog and the ROSAT All-Sky Survey (RASS). We report core flux densities and positions accurate to +/-0.5". Combined with the GB measuremens of the total radio emission, we derive the core-to-lobe ratio of objects in our sample and discuss their core-dominance relative to samples of radio galaxies and BL Lacertae objects. Our results show the ROSAT/GreenBank (RGB) sample is approximately an order of magnitude more core-dominated than the radio galaxy sample, but is more than an order of magnitude less core-dominated than highly beamed BL Lacertae object samples. Using simple beaming models, this indicates the typical object in the RGB catalog exhibits beamed radio emission and is oriented at a modest angle to the line-of-sight (theta ~ 25-30 degrees). The case of the origin of the X-ray emission is not as clear; the data are consistent with either an anisotropic unbeamed or moderately beamed X-ray component.