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.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso0308e
Tipo:Mappa
Data di rilascio:27 Marzo 2003
Notizie relative:eso0308
Grandezza:1902 x 1369 px

Riguardo all'oggetto

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

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