Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sao.ru/precise/Laboratory/Publications/2000/HSSIII/node4.html
Дата изменения: Tue Feb 8 09:57:26 2000
Дата индексирования: Sat Sep 11 20:33:13 2010
Кодировка:
Поисковые слова: изучение луны

Calar Alto 2.2m telescope observations

Follow-up spectroscopy with this telescope was conducted as a back-up for a main program which needed photometric conditions. So, the observations presented here were obtained in non-photometric conditions and the absolute flux calibration of the data is unreliable.

The Cassegrain focal reducer CAFOS of the 2.2m telescope was used with a long slit of 300 $\arcsec \times$ 3$\arcsec$ and a grism of 187 Å mm^-1 linear dispersion. Spectra were recorded on a 2K$\times$2K Site CCD operated in a 2$\times$1 binned mode (binning only along the dispersion direction), resulting in a spectral resolution of about 20 Å (FWHM), and a wavelength coverage $\lambda = 3700 - 8100$ Å. No order separation filter was installed. The slit orientation was again not aligned with the parallactic angle to keep the duty-cycle high. The exposure times varied between 10 and 15 minutes depending on the object brightness. The observations were complemented by standard star flux measurements, Hg-He-Cd lamp exposures for wavelength calibration, dome flat-, bias-, and dark-frames. The seeing was between 1.5 and 2.5 $\arcsec$ (FWHM).