在GBT上校准Argus和4 mm接收器
Calibration of Argus and the 4mm Receiver on the GBT
摘要：
介绍了Argus和GBT上的4 mm接收器仪器收集的数据的校准程序。在3 mm大气窗口内，测量了66- 116 GHz观测频率范围内的光束尺寸、孔径效率和主光束效率。该望远镜即使在最高频率（>100 GHz）下也表现良好。估计天线波束的误差图案中的功率量。大约95%的总天线功率包含在指向方向的1度内。使用小源导出的校准遵循基于Ruze方程的理论预期。一般来说，由ALMA定期监测的亮点源校准器可以用来精确地得出望远镜的主光束效率。
英文摘要：
The calibration procedures for data collected for Argus and the 4mm Receiver instruments on the GBT are presented. The measured beam size, aperture efficiency, and main-beam efficiency are derived for the range of observing frequencies (66--116 GHz) within the 3mm atmospheric window. The telescope performs well even at the highest frequencies (>100 GHz). The amount of power in the error pattern of the antenna beam is estimated. Approximately 95% of the total antenna power is contained within 1 degree of the pointed direction. The calibration derived using small sources follows theoretical expectations based on the Ruze equation. In general, bright point source calibrators that are monitored regularly by ALMA can be used to accurately derive the main-beam efficiency of the telescope.
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