The WSO-UV project is an efficient multipurpose orbital observatory for high sensitivity imaging. The imaging instrument Field Camera Unit (FCU) onboard WSO-UV will be the first UV camera to be flown to a geosynchronous orbit. The observatory is planned to operate for at least five years and perhaps longer. WSO-UV will open new opportunities in planetary science, stellar astrophysics, extragalactic astronomy and cosmology. This paper provides an information on updated FCU instrument.
The World Space Observatory Ultraviolet telescope is equipped with high dispersion (55,000) spectrographs working in the 1150 to 3100 Å spectral range. To evaluate the impact of the design on the scientific objectives of the mission, a simulation software tool has been developed. This simulator builds on the development made for the PLATO space mission and it is designed to generate synthetic time-series of images by including models of all important noise sources. We describe its design and performance. Moreover, its application to the detectability of important spectral features for star formation and exoplanetary research is addressed.
The performance of the WUVS (WSO-UV Spectrographs) can be evaluated through simulations of the expected observations. Here we discuss the implementation details and the noise models applied in the simulation software tool developed to carry on these simulations. The WUVS Simulator has been implemented as a further development of the PLATO Simulator, adapting it to the WUVS specific characteristics. It is designed to generate synthetic time-series of images by including models of all important noise sources. The expected overall noise budget of the output images is evaluated as a function of different sets of input parameters describing the instrument properties.
In this contribution, we describe the optical design of UVESP, an efficient instrument designed for mid resolution (30.000) spectropolarimetric observations in the 119-888nm wavelength range. Spectropolarimetry introduces challenging constraints in the image quality of the echellé design that are addressed via the introduction special optical elements. UVESP design is significantly optimized with respect to previous similar instruments, such as the spectrograph proposed for the UVMag mission, and it is the current baseline spectropolarimeter for the ARAGO mission.