The IAU recommended photometric system for ultraviolet astronomy

IF 2.7 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Ana I. Gómez de Castro, Noah Brosch, Daniela Bettoni, Leire Beitia-Antero, Paul Scowen, David Valls-Gabaud, Mikhail Sachkov
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引用次数: 0

Abstract

In the current era when access to space is becoming easier and at a lower cost thanks to the standardised cubesat technology, numerous missions are expected to be launched to observe, particularly, at ultraviolet wavelengths. Given the reduced dimensions of the telescope that a cubesat can carry, most of these missions will be focused on photometric surveys of a reduced sample of targets of interest, and therefore each mission will define their own photometric bands according to their scientific objectives and orbital constraints. However, in order to provide a coherent view of the ultraviolet sky, the data should be post-processed under a common framework. In 2017, the IAU working group on ultraviolet astronomy identified the need to define such a common framework for the upcoming ultraviolet missions, and coordinated the definition of a standard set of photometric bands that could serve for homogenizing the current and future data. This paper presents the procedure adopted by the working group for the definition of the standard photometric system, that was approved by the IAU during the General Assembly Business Sessions held in August, 2021. The photometric system consists of seven bands, denoted as UV1-UV7, all included in the range 115 - 400 nm. Some of these bands are based on existing filters, while others have been defined as theoretical bands with constant throughput. This system is to be regarded as a set of synthetic bands for post-processing the data of any mission, and an example of its application to the SPARCS cubesat is also included. The photometric bands are publicly available and can be downloaded from https://www.nuva.eu/uv-photometry/.

Abstract Image

国际天文学联合会推荐了紫外天文学的光度测量系统
由于采用了标准化的立方体卫星技术,进入太空变得越来越容易,成本也越来越低,预计将发射许多观测任务,特别是在紫外线波段进行观测。考虑到立方体卫星可以携带的望远镜尺寸减小了,这些任务中的大多数将集中于对感兴趣的目标样本进行光度测量,因此每个任务将根据其科学目标和轨道限制定义自己的光度带。然而,为了提供一个一致的紫外线天空视图,数据应该在一个共同的框架下进行后处理。2017年,国际天文学联合会紫外天文学工作组确定有必要为即将到来的紫外任务定义这样一个共同框架,并协调定义一套标准的光度带,可以用于均匀化当前和未来的数据。本文介绍了国际天文学联合会在2021年8月举行的大会业务会议上批准的标准光度系统定义工作组所采用的程序。光度系统由7个波段组成,记为UV1-UV7,范围为115 - 400nm。其中一些频带是基于现有的滤波器,而另一些则被定义为具有恒定吞吐量的理论频带。该系统将被视为一套用于任何任务数据后处理的合成波段,并包括其在SPARCS立方体卫星上应用的一个例子。光度带是公开的,可以从https://www.nuva.eu/uv-photometry/下载。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Experimental Astronomy
Experimental Astronomy 地学天文-天文与天体物理
CiteScore
5.30
自引率
3.30%
发文量
57
审稿时长
6-12 weeks
期刊介绍: Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.
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