A&A 437, 765-768 (2005)
DOI: 10.1051/0004-6361:20052751
Reliable elimination of telluric lines from stellar spectra
M. Hrudková1 and P. Harmanec1, 21 Astronomical Institute of the Charles University, V Holesovickách 2, 180 00 Praha 8, Czech Republic
e-mail: mary@atrey.karlin.mff.cuni.cz
2 Astronomical Institute, Academy of Sciences, 251 65 Ondrejov, Czech Republic
(Received 24 January 2005 / Accepted 27 February 2005 )
Abstract
We demonstrate that the powerful disentangling
technique used to separate the individual spectra of binary
components and telluric lines can also be used to remove telluric lines from the
spectrum of a single star by treating the telluric spectrum
as a second star. We tested that on the spectra of
Boo (=Arcturus) secured with a Reticon detector in the coudé
focus of the Ondrejov 2-m telescope. We demonstrate that the
method works well and is invaluable especially for the spectra of
red stars which are heavily blended with the telluric lines. The
disadvantage of the method is that one needs a number of spectra
of the star in question, secured at different months of the year.
The advantage is that one obtains the final disentangled stellar
spectrum with a high S/N ratio.
Key words: line: profiles -- techniques: spectroscopic -- stars: individual:
Boo
SIMBAD Objects
© ESO 2005