INTERFEROMETRY OF CYG-A AND CAS-A - SOURCE NOISE AT 327 MHZ

被引：4

作者：

MCCULLOUGH, PR

机构：

[1] Astronomy Department, University of California at Berkeley, Berkeley

来源：

ASTRONOMICAL JOURNAL | 1993年 / 106卷 / 02期

关键词：

D O I：

10.1086/116687

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Interferometric observations of Cyg A and Cas A at 327 MHz confirm predictions for the characteristics of noise in synthesis images of very bright sources. On a single baseline, the noise variances of the real and imaginary components of the complex visibility are not equal. The noise in an image is larger for positions on-source than off-source. The on-source noise is scattered into the off-source region by the sidelobes of the synthesized beam. Part of this contribution to the off-source noise can be removed by judicious deconvolution.

引用

页码：797 / &

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