High dispersion spectroscopy trials using an echelle spectrograph with CCD camera

Details High dispersion spectroscopy trials using an echelle spectrograph with CCD camera High dispersion spectroscopy trials using an echelle spectrograph with CCD camera

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145..321b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol., 145, no. 2, April 1985, p. 321-323. Research, supported by the Science and En

Astronomy and Astrophysics

Astrophysics

2

Charge Coupled Devices, Early Stars, Echelle Gratings, High Dispersion Spectrographs, Stellar Spectra, Spectral Resolution, Telescopes

Scientific paper

The performance of the Queen's University Belfast echelle spectrograph (McKeith et al., 1978) and a Royal Greenwich Observatory (RGO) CCD camera on the 90-cm Yapp telescope at RGO is evaluated experimentally in high-dispersion observations of the 589.0-nm and 589.6-nm D lines of Na in the bright stars Alpha Cyg and Alpha Boo during June-July 1984. The results are presented graphically, and the system is found to have dispersion about 1.0 A/mm, signal/noise about 80 for a 15-min exposure of Alpha Cyg and about 100 for a 5-min exposure of Alpha Boo, and resolving power about 100,000.

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