The Addition of a Long-Slit Spectroscopic Capability to the Ohio State Infrared Imaging System

该项目将为美国国家科学基金会支持的1.8米洛厄尔天文台红外成像系统增加长缝光谱能力。光谱选项将提供三个补充功能：o低分辨率（λ / δ λ = 550）长狭缝（6.8'）模式，将J、H或K大气窗口中的一个分散到整个探测器阵列上。o交叉分散模式，允许以550的分辨率观察整个有用波长范围，从1.18到2.45 (mu)m, 30“长狭缝或从0.96到2.45 (mu)m的点源。o更高分辨率（λ / δ λ = 1500）模式，狭缝长度更受限制（2.6'）；一个可定位的光栅安装将允许在这种模式下选择波长。所有的选项，包括从成像到光谱观测的转换，都将被远程控制和快速选择。分光仪将用于两个项目：研究星系的恒星成分和研究年轻恒星物体的演化状态。//

This project will add a long-slit spectroscopic capability to an NSF supported infrared imaging system for the 1.8m Lowell Observatory telescope. The spectroscopic option will provide three complimentary capabilities: o A low resolution (lamda/delta lamda = 550) long slit (6.8') mode, which will disperse one of the J, H, or K atmospheric windows across the detector array in its entirety. o A cross-dispersed mode that allows observations at a resolution of 550 of the entire useful wavelength range from 1.18 to 2.45 (mu)m with a 30" long slit or from 0.96 to 2.45 (mu)m for a point source. o A higher resolution (lamda/delta lamda = 1500) mode with a more restricted slit length (2.6'); a positionable grating mount will allow the selection of wavelengths in this mode. All the options, including the changeover from imaging to spectroscopic observing, will be remotely controlled and rapidly selectable. There are two projects that the spectrometer will be directed towards: studies of the stellar content of galaxies and of the evolutionary status of young stellar objects. //