Conceptual design of a wide-field near UV transient survey in a 6U CubeSat

Conceptual design of a wide-field near UV transient survey in a 6U CubeSat
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6U CubeSat 宽视场近紫外瞬态测量的概念设计

DOI:
10.1117/12.2313026
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发表时间:
2018
期刊:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
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作者:
Yatsu Yoichi ;Ozawa Toshiki ;Mamiya Hideo ;Kawai Nobuyuki ;Kikuya Yuhei ;Matsushita Masanori ;Matunaga Saburo ;Bilgi Pavaman ;Nikzad Shouleh ;Kulkarni Shrinivas R. ;et al.

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提出了一种在6U立方体卫星上进行宽视场近紫外瞬态测量的概念设计。紫外是瞬态天文学的前沿领域之一。为了打开发现区域,我们正在开发一颗6U立方体卫星进行瞬态勘探。可能的目标将是超新星爆发,潮汐破坏事件,以及早期NS-NS合并产生的蓝色辐射。如果我们只关注附近/明亮的光源,所需的检测极限大约是20等(AB)。为了避免背景光和光学光,我们选择了230-280 nm的波段。作为成像探测器,我们采用了一个δ掺杂背照CMOS。除了delta掺杂外,直接沉积在探测器上的多层涂层可以实现高带内UV QE和超低光学抑制比。考虑到这些规格,即使是8厘米的望远镜也可以达到20兆ab的检测极限。预期视场大于60°2。
A conceptual design of a wide-field near UV transient survey in a 6U CubeSat is presented. Ultraviolet is one of the frontier in the transient astronomy. To open up the discovery region, we are developing a 6U CubeSat for transient exploration. The possible targets will be supernova shock-breakouts, tidal disruption events, and the blue emission from NS-NS mergers in very early phase. If we only focused on nearby/bright sources, the required detection limit is around 20 mag (AB). To avoid the background and optical light, we chose a waveband of 230-280 nm. As an imaging detector, we employ a delta-doped back-illuminated CMOS. In addition to delta doping, the multi-layer coating directly deposited on the detector enables both a high in-band UV QE and the ultra-low optical rejection ratio. Taking into account these specifications, even an 8 cm telescope can achieve the detection limit of 20 magAB. The expected FoV is larger than 60 deg2.
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