We present a calibration component for the Murchison Widefield Array All-Sky Virtual Observatory (MWA ASVO) utilising a newly developed PostgreSQL database of calibration solutions. Since its inauguration in 2013, the MWA has recorded over 34 petabytes of data archived at the Pawsey Supercomputing Centre. According to the MWA Data Access policy, data become publicly available 18 months after collection. Therefore, most of the archival data are now available to the public. Access to public data was provided in 2017 via the MWA ASVO interface, which allowed researchers worldwide to download MWA uncalibrated data in standard radio astronomy data formats (CASA measurement sets or UV FITS files). The addition of the MWA ASVO calibration feature opens a new, powerful avenue for researchers without a detailed knowledge of the MWA telescope and data processing to download calibrated visibility data and create images using standard radio astronomy software packages. In order to populate the database with calibration solutions from the last 6 yr we developed fully automated pipelines. A near-real-time pipeline has been used to process new calibration observations as soon as they are collected and upload calibration solutions to the database, which enables monitoring of the interferometric performance of the telescope. Based on this database, we present an analysis of the stability of the MWA calibration solutions over long time intervals.

中文翻译：

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默奇森宽场阵列全天虚拟天文台的校准数据库

我们展示了一个用于默奇森宽场阵列全天虚拟天文台 (MWA ASVO) 的校准组件，该组件利用新开发的PostgreSQL校准解决方案数据库。自 2013 年成立以来，MWA 已记录了在 Pawsey 超级计算中心存档的超过 34 PB 的数据。根据 MWA 数据访问政策，数据在收集后 18 个月公开可用。因此，大部分档案数据现在可供公众使用。2017 年通过 MWA ASVO 接口提供了对公共数据的访问权限，这使得世界各地的研究人员能够以标准射电天文数据格式（CASA 测量集或 UV FITS 文件）下载 MWA 未校准数据。MWA ASVO 校准功能的添加为没有 MWA 望远镜和数据处理详细知识的研究人员打开了一条新的、强大的途径，以下载校准的能见度数据并使用标准射电天文软件包创建图像。为了使用过去 6 年的校准解决方案填充数据库，我们开发了全自动管道。近实时管道已用于在收集新的校准观测数据后立即对其进行处理，并将校准解决方案上传到数据库，从而可以监测望远镜的干涉测量性能。基于该数据库，我们对 MWA 校准解决方案在较长时间间隔内的稳定性进行了分析。