arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.10795astro-ph.IMastro-ph.GA
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2016-2019年绿岸望远镜L波段定标

L-band Calibration of the Green Bank Telescope from 2016-2019

Julian Goddy, Karen L. Masters, David V. Stark

摘要:

自2016年以来,HI-MaNGA调查一直在获得附近星系的中性氢(发射无线电21厘米线)测量,这是称为“MaNGA”调查的一部分。这是通过绿岸射电望远镜(GBT)的观测完成的。我们使用在整个期间观测运行开始时常规获得的校准数据,以及2019年获得的一组额外校准数据来检查L波段(1.4 GHz或20 cm)的标准GBT数据简化校准。我们在校准中发现了相对于GBT数据简化管道中针对此类数据给出的标准值的20%的恒定偏移。该校正将用于改进HI-MaNGA的测量。

英文摘要:

Since 2016, the HI-MaNGA survey has been obtaining neutral hydrogen (which emits a radio 21cm line) measurements for nearby galaxies which are part of a survey known as "MaNGA". This has been done using observations at the Green Bank Radio Telescope (GBT). We use calibration data obtained routinely at the start of observing runs during this entire period, as well as an extra set of calibration data obtained in 2019 to check the standard GBT data reduction calibrations at L-band (1.4 GHz, or 20cm). We find an constant offset of 20% in the calibration relative to the standard values given in the GBT data reduction pipeline for data of this type. This correction will be used to improve measurements for HI-MaNGA.

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。

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