We present some results from first observations we obtained a few days
ago (Aug 25 and 26, 1998) with the B&C spectrograph just installed on the
refurbished 1.22 m reflector in Asiago and still under commissioning. They
are intended to preliminary document the type of results one may obtain
at the lowest (150 ln/mm grating) and highest (1200 ln/mm grating) of possible
dispersions. For the timely nature of this document as well as some
technical shortcomings to be fixed (with flat fielding, encoders
and the software controlling the CCD) the extraction and calibration of the
presented spectra by no mean can be considered final or bugs-free.
The spectra have been treated in a standard fashion and calibrated into absolute fluxes (flat fielding was however not applied). The spectra have been extracted and calibrated with IRAF v2.11 under Linux. The graphics and plots has been prepared using WIP under Linux.
The TV guiding camera (looking directly onto the slit) in no-moon conditions and normal transparency sky has been found to detect normal color objects as faint as V=16.0 (the limit for direct placing on the slit being V=15.0 mag) at 20 millisec exposure and no integration (video mode). The field of view is 3.5 arcmin, with appreciable vignetting toward the borders.
Further details on the instrument may be found on the Asiago HomePage or questions may be posted to the Asiago Telescope Team (GAS) at email@example.com
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