Second generation spectroscopic instrumentation for the STELLA robotic observatory
| Autor: | Klaus G. Strassmeier, Arto Järvinen, Michael Weber, Ilya Ilyin, Manfred Woche |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Aperture business.industry FOS: Physical sciences Collimator Spectral bands Dichroic glass law.invention Telescope Optics Observatory law Spectral resolution Astrophysics - Instrumentation and Methods for Astrophysics business Spectrograph Instrumentation and Methods for Astrophysics (astro-ph.IM) |
| DOI: | 10.48550/arxiv.2012.08210 |
| Popis: | The current STELLA Echelle spectrograph (SES), which records 390nm to 870nm in one shot at a spectral resolution of 55000, will be replaced by a suite of specialized spectrographs in three spectral bands. The UV will be covered by a newly designed H&K spectrograph covering 380nm to 470nm (SES-H&K), the visual band (470nm - 690nm) will be covered by SES-VIS, which is a vacuum-stabilized spectrograph designed for high radial-velocity accuracy, and the NIR will be covered by the current SES spectrograph from 690nm to 1050nm. In order to improve the UV transmission, and to accommodate three different fibre-feeds, the prime focus corrector of the telescope will be refurbished, leading to an optical system with the f/2 1200mm spherical primary, a 4-lens collimator with 2 arcsec aperture, atmospheric dispersion corrector (ADC), and two dichroic beam splitters, feeding 3 separate fibre feeds for the three bands. The newly designed H&K spectrograph will be an Echelle spectrograph, based on a R4-grating with 41.6 l/mm and 110mmx420mm, using a f/5 camera and the cross-disperser in double pass (as in TRAFICOS, MIKE, KPF), using 21 spectral orders. The spectral resolution of all three spectrographs will be comparable to the 55000 of the current SES. |
| Databáze: | OpenAIRE |
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