SOPHIE instrument web page

Examples of SOPHIE Raw and Extracted spectra

Raw spectrum of HR 8634, a B8V spectrophotometric standard

Raw spectrum of HD 209458, a G0V star with an extra-solar planet

Extracted spectrum of HR 8634

Extracted spectrum of HD 209458

Examples of raw and extracted spectra, obtained in the high-efficiency (HE) mode on August 5/6. The raw spectra actually have 41 usable echelle orders but the nominal coverage spans the interval λ3872-6943 Å. The extracted spectra, which presently cover only 39 orders, are shown zoomed vertically by a factor 50 for the viewer's convenience. Sharp telluric absorption lines due to molecular Oxygen are clearly seen in the topmost extracted order (B-band heads at λ6867 Å; R-branch, and λ6884 Å; P-branch). The contrast between the hot star spectrum, dominated by the broad Hydrogen lines and the cool solar-type spectrum, dominated by metallic lines, is striking. The left-to-right modulation, most noticeable in the blue (bottom of each picture), is due to the blaze function. A few spikes visible in the right-hand spectra have not yet been supressed by the extraction software.

08.08.06 / updated 24.10.18