Measurements of collisional linewidths in the nu(2) band of H(2)O from Fourier-transformed flame spectra.

The collisional widths of more than 200 transitions belonging to the v(2) band of the H(2)O molecule were measured by using the Fourier-transformed spectra of an air-methane flame at 2000 K. A nonlinear least-squares method was used to determine the line widths for a wide range of J (up to 28) and K(a) (up to 14) quantum number values. Finally, an analysis of the results as functions of J and K(a) is presented.

Near infrared astronomical light collector.

A 4-m aperture light collector has been built using the mosaic principle specifically for high resolution stellar spectroscopy in the near infrared by the Fourier multiplex technique. The most novel feature is complete servo control of all optical elements to bring individual images to a common point. Initial goals were a spectral survey of ir objects, and the testing of techniques for a larger future collector. However, the project has been stopped by lack of interest and support; the finished collector will not be used.