The long slit spectrograph onboard the World Space Observatory-Ultraviolet

摘要

The World Space Observatory - Ultraviolet (WSO-UV) is a space astronomy project led by Russia, with contributions from China, Germany, Italy, Spain, United Kingdom and a number of other countries in the world. WSO-UV consists of a 1.7-meter diameter telescope and three focal plane science instruments. The Long Slit Spectrograph instrument onboard WSO-UV will produce moderate spectral resolution (R=1000-2500) spectra in the 102nm ～ 320nm wavelength range along a slit of 75 arcsec in length and 1 arcsec in width. The spatial resolution of the instrument will be ～1 arcsec. A two-channel scheme is proposed to optimize performance, with each of these using a Rowland Circle optical design with MicroChannel Plate detectors in the focal plane. Based on preliminary results of feasibility study we will discuss the detailed design of the spectrograph and its expected performance in this paper.