Upgrade of Facility Camera (NSFCAM) for the IRTF

AST-0096839 TokunagaNSFCAM是10多年前开发的用于红外望远镜设施（IRTF）的红外成像系统，将进行升级，以适应自适应光学系统使用时望远镜提供的改进图像质量，并适应新的红外焦平面技术的发展。 自适应光学系统实现了望远镜的衍射限制性能，这是比没有A/O好约8倍的分辨率的空间增益。 目前的焦平面是256 × 256 InSb阵列。 新阵列将是1024 x 1024像素组件。 对目前非常成功的系统的升级包括：一个新的阵列控制器，新的透镜管，以提供每像素0.04和0.08弧秒的新像素尺度，一个专用于NSFCAM的波前传感器，以及一个新的1024 x 1024科学级焦平面，该焦平面通过另一来源的资金提供给该项目。该仪器包括一个棱镜和一个圆形可变滤波器和一个偏振计，使光谱偏振成像在选定的光谱波段之间的1和5微米的波长。 科学计划包括对扩展源（如行星、彗星星星团、恒星形成区、银河系中心、活动星系核）的AO观测，以及对星周盘、附近恒星的暗淡伴星和恒星周围的碎片盘进行更小范围的更高空间分辨率观测。***

AST-0096839TokunagaThe NSFCAM, an infrared imaging system developed over 10 years ago for use at the Infrared Telescope Facility (IRTF) will be upgraded to accommodate the improved image quality now given by the telescope when the adaptive optics system is in use and also accommodate new infrared focal plane technology developments. The adaptive optics system enables diffraction limited performance of the telescope, which is a spatial gain in resolution of a factor of about 8 better than without A/O. The current focal plane is a 256 by 256 InSb array. The new array will be a 1024 x 1024 pixel assembly. Upgrades to the current very successful system include: a new array controller, new lens tubes to provide new pixel scales of 0.04 and 0.08 arcseconds per pixel, a dedicated wavefront sensor for NSFCAM, and a new 1024 x 1024 science grade focal plane that is provided to the project through funds from another source. The instrument includes a Grism and a circular variable filter and a polarimeter which enable spectro-polarimetric imaging at selected spectral bands between 1 and 5 micrometer wavelengths. Science planned includes AO observations of extended sources such as planets, comets star clusters, star-forming regions, the Galactic Center, active galactic nuclei), as well as observations at higher spatial resolution across smaller fields for circumstellar disks, faint companions to near-by stars, and debris disks around stars. ***