标题： 干涉测量监测伽马射线明亮活动星系核 II：频率相位传递 显示英文标题

标题： Interferometric Monitoring of Gamma-ray Bright Active Galactic Nuclei II: Frequency Phase Transfer

摘要： 干涉测量监测伽马射线明亮活动星系核（iMOGABA）计划不仅提供了对明亮伽马射线探测活动星系核（AGN）的同步多频段观测，还涵盖了迄今为止系统监测的最高甚长基线干涉测量（VLBI）频率，高达129 GHz。 然而，在最高观测频率下对弱源进行观测和成像非常具有挑战性。 在本系列的第二篇论文中，我们评估了频率相位传递技术在iMOGABA中的可行性，以在该计划的较高频率（86和129 GHz）下获得更长的相干时间，并成像使用标准技术未检测到的额外源。 我们发现，即使在非最佳天气条件下，这种方法也适用于iMOGABA计划。 显示英文摘要

摘要： The Interferometric Monitoring of Gamma-ray Bright Active galactic nuclei (iMOGABA) program provides not only simultaneous multifrequency observations of bright gamma-ray detected active galactic nuclei (AGN), but also covers the highest Very Large Baseline Interferometry (VLBI) frequencies ever being systematically monitored, up to 129 GHz. However, observation and imaging of weak sources at the highest observed frequencies is very challenging. In the second paper in this series, we evaluate the viability of the frequency phase transfer technique to iMOGABA in order to obtain larger coherence time at the higher frequencies of this program (86 and 129 GHz) and image additional sources that were not detected using standard techniques. We find that this method is applicable to the iMOGABA program even under non-optimal weather conditions.