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Дата изменения: Tue Nov 24 21:18:57 1998
Дата индексирования: Sat Sep 11 22:06:40 2010
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Calar Alto 2.2m observations

Further follow-up spectroscopy was made during nights May 30 - June 4, 1995, using the Boller & Chivens spectrograph attached to the Cassegrain focus of the Calar Alto 2.2m telescope. A 300''$\times$2'' long slit was used. The spectra were recorded on a 1024$\times$1024 pixel Tektronix CCD operated in a 2$\times$1 binned mode (binning only along the slit direction), resulting in a spectral resolution of 9 Å and a wavelength coverage $\lambda$ 3700-8100 Å. The exposure times varied between 2.5 and 15 minutes depending on the galaxy brightness. The observations were complemented by standard star flux measurements, lamp exposures for wavelength calibration, dome flats, bias and dark frames. The seeing was mostly about 1'', rising at times up to 2''. The observations during the second and the last night were made under non-photometric conditions. The flux calibration for the dozen objects observed during the second half of the last night is especially uncertain.