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1994PASP..106.1285B - Publ. Astron. Soc. Pac., 106, 1285-1297 (1994/December-0)
The AFOE : a spectrograph for precise Doppler studies.
BROWN T.M., NOYES R.W., NISENSON P., KORZENNIK S. and HORNER S.
Abstract (from CDS):
The AFOE is coupled to the Tillinghast 1.5-m telescope at the F. L. Whipple Observatory. It presently achieves S/N = 500 in the continuum near 500 nm in 60s when observing Arcturus (alpha-Boo, m_V = -0.04). This noise level sets a limit of about 0.7 ms^-1 to the Doppler precision attainable in this length of observing time. Currently, our actual frame-to-frame repeatability is worse than the photon noise limited value by about a factor of 3 for this bright star, and about 1.5 for stars with m_V = 4. Work is continuing to refine data processing methods so that the ultimate noise limit may be approached more closely, and to improve the spectrograph's relatively low efficiency.
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Simbad objects: 2
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