Design of the VLT-CUBES image slicers:
-
Published:2022-09-05
Issue:1
Volume:55
Page:267-280
-
ISSN:0922-6435
-
Container-title:Experimental Astronomy
-
language:en
-
Short-container-title:Exp Astron
Author:
Calcines AriadnaORCID, Wells Martyn, O’Brien Kieran, Morris Simon, Seifert Walter, Zanutta Alessio, Evans Chris, Di Marcantonio Paolo
Abstract
AbstractCUBES is a high efficiency spectrograph designed for a Cassegrain focus of the Very Large Telescope and is expected to be in operation in 2028. It is designed to observe point or compact sources in a spectral range from 300 to 405nm. CUBES will provide two spectral resolving powers: R$$\ge$$
≥
20,000 for high resolution (HR) and R$$\ge$$
≥
5,000 for low resolution (LR). This is achieved by using an image slicer for each resolution mode. The image slicers re-format a rectangular on-sky field of view of either 1.5arcsec by 10arcsec (HR) or 6arcsec by 10arcsec (LR) into six side-by-side slitlets which form the spectrograph slit. The slit dimensions are 0.19mm $$\times$$
×
88mm for HR and 0.77mm $$\times$$
×
88mm for LR. The on-sky and physical widths of the slicer mirrors are 0.25arcsec/0.5mm (HR) and 1arcsec/2mm (LR). The image slicers reduce the spectrograph entrance slit etendue and hence the size of the spectrograph optics without associated slit losses. Each of the proposed image slicers consists of two arrays of six spherical mirrors (slicer mirror and camera mirror arrays) which provide a straight entrance slit to the spectrograph with almost diffraction-limited optical quality. This paper presents the description of the image slicers at the end of the Phase A conceptual design, including their optical design and expected performance.
Funder
Science and Technology Facilities Council
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference10 articles.
1. Evans, C.J., Barbury, B., Castilho, B., Smiljanic, R., Melendez, J., Japelj, J., Cristiani, S., Snodgrass, C., Boniifacio, P., Puech, M., Quirrenbach, A.: Revisiting the science case for near-UV spectroscopy with the VLT. Proc. SPIE 10702(107022E), 10 (2018) 2. Ernandes, H., Evans, C.J., Barbuy, B., Castilho, B., Cescutti, G., Christlieb, N., Cristiani, S., Di Marcantonio, P., Hansen, C., Quirrenbach, A., Smiljanic, R.: Stellar astrophysics in the near-UV with VLT-CUBES, Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144760 (2020) 3. Smiljanic, R., da Silva, A.R., Giribaldi, R.E.: Detecting weak beryllium lines with CUBES, ExA, arXiv:2203.16158, in press as part of the Special Issue (2022) 4. Giribaldi, R.E., Smiljanic, R.: Beryllium abundances in turn-off stars of globular clusters with the CUBES spectrograph, ExA, arXiv:2203.15604, in press as part of the Special Issue (2022) 5. Ernandes, H., Barbuy, B., Castilho, B., et al.: Simulated observations of heavy elements with CUBES, ExA, arXiv:2203.15693, in press as part of the Special Issue (2022)
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|