InGaAs探测器最初是为夜视设备设计的,现在已经开始在地面宽带成像中实现背景限制性能。这些探测器的较低成本可以使多波段仪器,小型望远镜阵列和大型焦平面成为可能,而高性能HgCdTe探测器则不经济。我们开发了一款摄像机,用于操作FLIR AP 1121传感器,采用深度热电冷却和斜坡上采样来最大限度地降低噪声。我们测量了163 $~e$ - s $^{-1}$ pix $^{-1}$的暗电流,87 $~e$ - up-the-ramp的读取噪声,以及80 k $~e$ -的阱深度。实验室光度测试达到了230 ppm hr $^{-1/2}$的稳定性,这是探测系外行星凌日所需的。InGaAs探测器也适用于近红外时域天文学的其他分支,从褐矮星天气到引力波跟踪。
英文摘要:
Originally designed for night-vision equipment, InGaAs detectors are beginning to achieve background-limited performance in broadband imaging from the ground. The lower cost of these detectors can enable multi-band instruments, arrays of small telescopes, and large focal planes that would be uneconomical with high-performance HgCdTe detectors. We developed a camera to operate the FLIR AP1121 sensor using deep thermoelectric cooling and up-the-ramp sampling to minimize noise. We measured a dark current of 163$~e$- s$^{-1}$ pix$^{-1}$, a read noise of 87$~e$- up-the-ramp, and a well depth of 80k$~e$-. Laboratory photometric testing achieved a stability of 230 ppm hr$^{-1/2}$, which would be required for detecting exoplanet transits. InGaAs detectors are also applicable to other branches of near-infrared time-domain astronomy, ranging from brown dwarf weather to gravitational wave follow-up.
DUET: Design of a simultaneous InGaAs--CCD split-beam imager for ultra-cool dwarf exoplanet transit survey
ETH Zürich(苏黎世联邦理工学院);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Astrobiology Research Unit, Université de Liège(列日大学天体生物学研究单元);School of Physics and Astronomy, University of Birmingham(伯明翰大学物理与天文学院)
The WINTER Observatory: A One-Degree InGaAs Survey Camera to study the Transient Infrared Sky
Harvard & Smithsonian(哈佛-史密森天体物理中心);Massachusetts Institute of Technology(麻省理工学院);California Institute of Technology(加州理工学院);Columbia University(哥伦比亚大学);University of Maryland, College Park(马里兰大学帕克分校)
Antarctic Infrared Binocular Telescope. I. System Overview, Laboratory Testing, and On-Sky Performance Evaluation
School of Physics and Astronomy, Sun Yat-sen University(中山大学物理与天文学院);CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area(粤港澳大湾区宇宙线科学中心);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);School of Physics, University of New South Wales(新南威尔士大学物理学院)
On-sky performance and prospects of near-infrared CMOS detectors in exoplanet detection: first year of SPIRIT
Cavendish Laboratory(卡文迪许实验室);ETH Zurich(苏黎世联邦理工学院);Instituto de Astrofísica de Canarias (IAC)(加那利群岛天体物理研究所);Astrobiology Research Unit, Université de Liège(列日大学天体生物学研究单元);Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology(麻省理工学院地球、大气与行星科学系);School of Physics & Astronomy, University of Birmingham(伯明翰大学物理与天文学院)
Photometric Redshifts with the LSST II: The Impact of Near-Infrared and Near-Ultraviolet Photometry
精确的测光红移(照片- $z$)估计是必不可少的宇宙科学目标的维拉C。Rubin Observatory Legacy Survey of Space and Time(鲁宾天文台时空遗产巡天)在这项工作中,我们使用模拟的光度模拟星系目录,探讨如何LSST照片$z$估计可以提高近红外(NIR)和/或紫外线(UV)光度从欧几里得,WFIRST,和/或卡斯特空间望远镜。一般来说,我们发现,更深的光学测光可以减少光$z$估计的标准偏差比增加近红外或紫外线过滤器,但额外的过滤器是唯一的方法,以显着降低星系的比例与灾难性的低估或高估的光$z$。对于欧几里德,我们发现,${JH}$ $5σ$光度检测的增加可以减少标准偏差的星系与$z>1$($z>0.3$)的${\sim}20\%$(${\sim}10\%$),和异常值的分数由${\sim}40\%$(${\sim}25\%$)。对于WFIRST,我们展示了如何添加深度${YJHK}$光度测量可以在$z>1.5$处将标准差降低${\gtrsim}50\%$,并将离群值的比例大幅降低到整体${\sim}2\%$。对于CASTOR,我们发现加入它的${UV}$和$u$带测光可以使具有$z<0.5$的星系的标准差减少${\sim}30\%$,离群值减少${\sim}50\%$。我们还评估了与NIR和UV调查重叠的天空区域内的照片- $z$结果,以及使…