Hi Christian! Despite the wine I managed to finish spectra acquisition...
This is the result (I sent profile to Olivier):
I don't well understand... The higher resolution seems to suffer the less SNR (in addition here I exposed for less than other 35 um spectra). Maybe I'll go back to 35 micron slit. In case of weather changes during the night (clouds passage or when the sky becomes overcast) perhaps it is more likely to reach a sufficient result.
See you soon and good luck for AZ Cas eclipse observations (also to all forum member)!
Paolo