Physics – Optics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..627....2m&link_type=abstract
IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 1 (A87-36376 15-35). Bellingha
Physics
Optics
9
Accelerometers, Doppler Effect, Fabry-Perot Interferometers, Stellar Spectra, Accuracy, Astronomical Spectroscopy, Calibrating, Etalons, Fiber Optics, Precision
Scientific paper
The authors have made accurate observations of the changes in Doppler shift of stellar absorption lines. The scrambling of incident light by an optical fiber and the stability of wavelength calibration by a tilt-tunable Fabry-Perot etalon provide immunity to systematic errors. A cross-dispersed echelle spectrograph spatially separates the orders of constructive interference transmitted through the etalon. Selecting several echelle diffraction orders in the vicinity of 4250 - 4750 Å, which are imaged on a CCD, about 350 points on the profile of the stellar spectrum are sampled by successive orders of interferometric transmission through the etalon. At 4300 Å each interference order is 47 milliangstroms wide and the sample points are 0.64 Å apart.
Frecker J. E.
McMillan Robert S.
Merline William Jon
Perry Marcus L.
Smith Paul H.
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