A1 Refereed original research article in a scientific journal
Gregor@night: The future high-resolution stellar spectrograph for the GREGOR solar telescope
Authors: Strassmeier KG, Ilyin IV, Woche M, Granzer T, Weber M, Weingrill J, Bauer SM, Popow E, Denker C, Schmidt W, von der Luhe O, Berdyugina S, Collados M, Koubsky P, Hackman T, Mantere MJ
Publisher: WILEY-V C H VERLAG GMBH
Publication year: 2012
Journal: Astronomical Notes / Astronomische Nachrichten
Journal name in source: ASTRONOMISCHE NACHRICHTEN
Journal acronym: ASTRON NACHR
Number in series: 9
Volume: 333
Issue: 9
First page : 901
Last page: 910
Number of pages: 10
ISSN: 0004-6337
DOI: https://doi.org/10.1002/asna.201211727
Abstract
We describe the future night-time spectrograph for the GREGOR solar telescope and present its science core projects. The spectrograph provides a 3-pixel resolution of up to R = 87 000 in 45 echelle orders covering the wavelength range 390-900 nm with three grating settings. An iodine cell can be used for high-precision radial velocity work in the 500-630 nm range. The operation of the spectrograph and the telescope will be fully automated without the presence of humans during night-time and will be based on the successful STELLA control system. Future upgrades include a second optical camera for even higher spectral resolution, a Stokes-V polarimeter and a link to the laser-frequency comb at the Vacuum Tower Telescope. The night-time core projects are a study of the angular-momentum evolution of The Sun in Time and a continuation of our long-term Doppler imaging of active stars. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
We describe the future night-time spectrograph for the GREGOR solar telescope and present its science core projects. The spectrograph provides a 3-pixel resolution of up to R = 87 000 in 45 echelle orders covering the wavelength range 390-900 nm with three grating settings. An iodine cell can be used for high-precision radial velocity work in the 500-630 nm range. The operation of the spectrograph and the telescope will be fully automated without the presence of humans during night-time and will be based on the successful STELLA control system. Future upgrades include a second optical camera for even higher spectral resolution, a Stokes-V polarimeter and a link to the laser-frequency comb at the Vacuum Tower Telescope. The night-time core projects are a study of the angular-momentum evolution of The Sun in Time and a continuation of our long-term Doppler imaging of active stars. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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