CAGIRE: a wide-field NIR imager for the COLIBRI 1.3 meter robotic telescope

IF 2.7 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2023-07-04 DOI:10.1007/s10686-023-09903-x
Alix Nouvel de la Flèche, Jean-Luc Atteia, Jérémie Boy, Alain Klotz, Arthur Langlois, Marie Larrieu, Romain Mathon, Hervé Valentin, Philippe Ambert, Jean-Claude Clemens, Damien Dornic, Eric Kajfasz, Jean Le Graët, Olivier Llido, Aurélia Secroun, Olivier Boulade, Ayoub Bounab, Giacomo Badano, Olivier Gravrand, Sébastien Aufranc, Adrien Lamoure, Lilian Martineau, Laurent Rubaldo, Hervé Geoffray, François Gonzalez, Stéphane Basa, François Dolon, Johan Floriot, Simona Lombardo, Salvador Cuevas, Alejandro Farah, Jorge Fuentes, Rosalía Langarica, Alan M. Watson, Nathaniel Butler
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Abstract

The use of high energy transients such as Gamma Ray Bursts (GRBs) as probes of the distant universe relies on the close collaboration between space and ground facilities. In this context, the Sino-French mission SVOM has been designed to combine a space and a ground segment and to make the most of their synergy. On the ground, the 1.3 meter robotic telescope COLIBRI, jointly developed by France and Mexico, will quickly point the sources detected by the space hard X-ray imager ECLAIRs, in order to detect and localise their visible/NIR counterpart and alert large telescopes in minutes. COLIBRI is equipped with two visible cameras, called DDRAGO-blue and DDRAGO-red, and an infrared camera, called CAGIRE, designed for the study of high redshift GRBs candidates. Being a low-noise NIR camera mounted at the focus of an alt-azimutal robotic telescope imposes specific requirements on CAGIRE. We describe here the main characteristics of the camera: its optical, mechanical and electronics architecture, the ALFA detector, and the operation of the camera on the telescope. The instrument description is completed by three sections presenting the calibration strategy, an image simulator incorporating known detector effects, and the automatic reduction software for the ramps acquired by the detector. This paper aims at providing an overview of the instrument before its installation on the telescope.

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CAGIRE:用于 COLIBRI 1.3 米机器人望远镜的宽视场近红外成像仪
利用伽马射线暴(GRBs)等高能瞬变现象作为遥远宇宙的探测器,有赖于空间和地面设施之间的密切合作。在这种情况下,中法合作的 SVOM 任务将空间段和地面段结合起来,最大限度地发挥它们的协同作用。在地面上,由法国和墨西哥联合研制的 1.3 米机器人望远镜 COLIBRI 将迅速指向空间硬 X 射线成像仪 ECLAIRs 探测到的源,以便探测和定位其可见光/近红外对应物,并在几分钟内向大型望远镜发出警报。COLIBRI 配备了两台名为 DDRAGO-blue 和 DDRAGO-red 的可见光照相机和一台名为 CAGIRE 的红外照相机,专门用于研究高红移 GRBs 候选者。作为一台低噪声近红外摄像机,CAGIRE 安装在一个高天顶机器人望远镜的焦点上,这就对它提出了特殊要求。我们在此介绍这台照相机的主要特点:其光学、机械和电子结构,ALFA 探测器,以及照相机在望远镜上的操作。仪器介绍由三个部分组成,分别介绍校准策略、包含已知探测器效应的图像模拟器以及探测器获取的斜率自动缩减软件。本文旨在提供该仪器在望远镜上安装之前的概况。
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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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