MWA GLEAM第1年调查中的噪声和混淆限值
Limits of noise and confusion in the MWA GLEAM year 1 survey
摘要：
银河系和河外全天空MWA巡天（GLEAM）是一个新的相对低分辨率，连续的72-231 MHz巡天，对10度+25度以南的整个天空进行巡天。在本文中，我们概述了一种方法来确定系统噪声，经典混淆和旁瓣混淆的GLEAM图像的相对贡献。如果我们要充分利用GLEAM数据并改进未来低频调查的设计，那么对GLEAM的噪声和混淆特性的理解是必不可少的。我们的早期结果表明，旁瓣混淆占主导地位的整个频率范围内，这意味着在数据处理的增强有可能进一步降低噪声。
英文摘要：
The GaLactic and Extragalactic All-sky MWA survey (GLEAM) is a new relatively low resolution, contiguous 72-231 MHz survey of the entire sky south of declination +25 deg. In this paper, we outline one approach to determine the relative contribution of system noise, classical confusion and sidelobe confusion in GLEAM images. An understanding of the noise and confusion properties of GLEAM is essential if we are to fully exploit GLEAM data and improve the design of future low-frequency surveys. Our early results indicate that sidelobe confusion dominates over the entire frequency range, implying that enhancements in data processing have the potential to further reduce the noise.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
