The GALAH survey: relative throughputs of the 2dF fibre positioner and the HERMES spectrograph from stellar targets
Article
Article Title | The GALAH survey: relative throughputs of the 2dF fibre positioner and the HERMES spectrograph from stellar targets |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Simpson, Jeffrey D. (Author), de Silva, G. M. (Author), Bland-Hawthorn, J. (Author), Freeman, K. C. (Author), Martell, S. L. (Author), Schlesinger, Katharine J. (Author), Sharma, Sanjib (Author), Zucker, D. B. (Author), Zwitter, T. (Author), Kos, J. (Author), Anguiano, Borja (Author), Nataf, David M. (Author), Reid, Warren (Author) and Wittenmyer, Robert A. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 459 (1), pp. 1069-1081 |
Number of Pages | 13 |
Year | 2016 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stw746 |
Web Address (URL) | https://academic.oup.com/mnras/article/459/1/1069/2609079 |
Abstract | We present an analysis of the relative throughputs of the 3.9-m Anglo-Australian Telescope’s 2dF/HERMES (High Efficiency and Resolution Multi-Element Spectrograph) system, based upon spectra acquired during the first two years of the Galactic Archaeology with HERMES survey. Averaged spectral fluxes of stars were compared to their photometry to determine the relative throughputs of fibres for a range of fibre position and atmospheric conditions. We find that overall the throughputs of the 771 usable fibres have been stable over the first two years of its operation. About 2.5 per cent of fibres have throughputs much lower than the average. There are also a number of yet unexplained variations between the HERMES bandpasses, and mechanically and optically linked fibre groups known as retractors or slitlets related to regions |
Keywords | spectroscopic techniques |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Australian Astronomical Observatory, Australia |
University of Sydney | |
Australian National University | |
University of New South Wales | |
Macquarie University | |
University of Ljubljana, Slovenia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3x6x/the-galah-survey-relative-throughputs-of-the-2df-fibre-positioner-and-the-hermes-spectrograph-from-stellar-targets
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