Keck Observatory in Hawaii, using the Near Infrared Echelle Spectrograph
Christian Buil has used an echelle spectrograph
to measure the Doppler shift of stars with orbiting planets.
9] ESPRESSO, the Echelle SPectrograph
for Rocky Exoplanet and Stable Spectroscopic Observations, is to be installed on the ESO Very Large Telescope.
Tau Bootis b does not transit in front of its parent star from our viewpoint on Earth, but Lockwood and colleagues were able to tease out the weak light emitted by the planet using the Near Infrared Echelle Spectrograph
(NIRSPEC) at the Keck Observatory in Hawaii.
Using data of tau Bootis b from the Near Infrared Echelle Spectrograph
(NIRSPEC) at the W.
The researchers used the radial velocity or wobble method, which relies on Keck's High Resolution Echelle Spectrograph
, or HIRES instrument, to spread light collected from the telescope into its component wavelengths or colors, in order to find the planet.
Our technique can easily be adapted to different echelle spectrographs
in the visible and near infrared by simply using an etalon optimized for that particular spectrograph.