Stability of HARPS velocity measurements during an observing night

Powerful demonstration of the extraordinary stability of the HARPS spectrograph. It plots the instrumentally induced velocity change, as measured during one night (9 consecutive hours) in the commissioning period. The drift of the instrument is determined by computing the exact position of the Thorium emission lines. As can be seen, the drift is of the order of 1 m/s during 9 hours and is measured with an accuracy of only 20 cm/s.

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ESO

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Id:eso0308e
Tipo:Carta
Data de divulgação:27 de Março de 2003
Notícias relacionadas:eso0308
Tamanho:1902 x 1369 px

Sobre o objeto

Nome:Spectrograph
Tipo:Unspecified : Technology : Observatory : Instrument
Categoria:Illustrations

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