论文标题
MEQSILHOUETTE V2：事件地平线望远镜的光谱分辨偏光综合数据生成
MeqSilhouette v2: Spectrally-resolved polarimetric synthetic data generation for the Event Horizon Telescope
论文作者
论文摘要
我们提出了MEQSILHOUETTE v2.0（MEQSV2），这是一种完全极化的，时间和频率分辨的合成数据生成软件，用于模拟毫米（MM）波长非常长的基线干涉测量法（VLBI）观察值，该观察值具有异质阵列。合成数据是理解实际观察，测试校准和成像算法以及预测现有或拟议站点的性能指标的关键组成部分。 MEQSV2将基于物理学的工具和大气信号损坏应用于经验衍生的站点和站点参数的限制。新版本能够使用无线电干涉测量方程（RIME）形式主义应用仪器极化效应和各种其他频谱分辨效应，并生成与旨在处理真实数据的校准管道兼容的合成数据。我们使用不同的阵列展示了MEQSV2的各种损坏能力，重点是复杂的带通增益对230 GHz的EHT闭合数量的影响。我们通过使用POLSOLVE对合成EHT数据进行极化自校准来验证频率依赖性极化泄漏实现。我们还注意到CM波长VLBI阵列分析和设计以及未来方向的潜在应用。
We present MeqSilhouette v2.0 (MeqSv2), a fully polarimetric, time-and frequency-resolved synthetic data generation software for simulating millimetre (mm) wavelength very long baseline interferometry (VLBI) observations with heterogeneous arrays. Synthetic data are a critical component in understanding real observations, testing calibration and imaging algorithms, and predicting performance metrics of existing or proposed sites. MeqSv2 applies physics-based instrumental and atmospheric signal corruptions constrained by empirically-derived site and station parameters to the data. The new version is capable of applying instrumental polarization effects and various other spectrally-resolved effects using the Radio Interferometry Measurement Equation (RIME) formalism and produces synthetic data compatible with calibration pipelines designed to process real data. We demonstrate the various corruption capabilities of MeqSv2 using different arrays, with a focus on the effect of complex bandpass gains on closure quantities for the EHT at 230 GHz. We validate the frequency-dependent polarization leakage implementation by performing polarization self-calibration of synthetic EHT data using PolSolve. We also note the potential applications for cm-wavelength VLBI array analysis and design and future directions.
