AMiBA：系统性能
AMiBA: System Performance
摘要：
Y.T.微波背景各向异性Lee阵列（AMiBA）于2007年初开始科学运行。本工作描述了系统性能的优化测量的Sunyaev-Zel'dovich效应的六个大质量星系团的红移$0.09 - 0.32$。在2块差分观测中，在1小时的源上积分中，我们用7个0.6米的碟实现了$63\pm 7$ mJy的点源灵敏度。我们测量并补偿了我们的平台安装干涉仪的天线之间的延迟。光束切换被用来消除仪器的不稳定性和地面拾取。总功率和相稳定性在小时的时间尺度上是良好的，并且该系统被示出在每个基线/相关性300小时的等效时间尺度上向下积分，或者对于整个阵列约10小时。虽然宽带相关器导致良好的灵敏度，但相关器中的少量滞后导致测量不佳的带通响应。我们通过使用外部校准器（木星和土星）对此进行了校正。以木星为通量标准，测得土星盘亮温度为$149^{+5}_{-12}$ K。
英文摘要：
The Y.T. Lee Array for Microwave Background Anisotropy (AMiBA) started scientific operation in early 2007. This work describes the optimization of the system performance for the measurements of the Sunyaev-Zel'dovich effect for six massive galaxy clusters at redshifts $0.09 - 0.32$. We achieved a point source sensitivity of $63\pm 7$ mJy with the seven 0.6m dishes in 1 hour of on-source integration in 2-patch differencing observations. We measured and compensated for the delays between the antennas of our platform-mounted interferometer. Beam switching was used to cancel instrumental instabilities and ground pick up. Total power and phase stability were good on time scales of hours, and the system was shown to integrate down on equivalent timescales of 300 hours per baseline/correlation, or about 10 hours for the entire array. While the broadband correlator leads to good sensitivity, the small number of lags in the correlator resulted in poorly measured bandpass response. We corrected for this by using external calibrators (Jupiter and Saturn). Using Jupiter as the flux standard, we measured the disk brightness temperature of Saturn to be $149^{+5}_{-12}$ K.
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