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- W1997768826 abstract "The High Efficiency and Resolution Canterbury University Large Echelle Spectrograph (HERCULES) is a fibre-fed echelle spectrograph that has been in operation at the Mount John University Observatory for just over one year. HERCULES is used in conjunction with the 1-m McLellan telescope, and can capture the spectrum from 380 nm to 880 nm on a single 50-mm square CCD. Resolving powers of up to 70000 are possible when using 50-μm fibres, and a resolving power of 35000 is possible with a 100-μm fibre. Wavelength calibration is done using sequential exposures of a thorium-argon emission lamp.The spectrograph is designed to achieve high efficiency when the seeing is well matched to the image scale on the fibre input (up to 20% in 1 arcsec seeing), and high stability is achieved by having thespectrograph installed inside a vacuum tank in a thermally isolatedenvironment. Initial indications are that radial velocities with aprecision of ≤ 10 ms -1 are routinely possible in the short-term." @default.
- W1997768826 created "2016-06-24" @default.
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- W1997768826 date "2003-03-07" @default.
- W1997768826 modified "2023-09-23" @default.
- W1997768826 title "HERCULES: a high-resolution spectrograph for small to medium-sized telescopes" @default.
- W1997768826 doi "https://doi.org/10.1117/12.460898" @default.
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