MDM Observatory 2.4m Telescope Observing Report for 2010 Mar 12

Observer(s): Halpern, Liu, Eracleous
Institution(s): Columbia

Instrument: CCDS

Worked for 11 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.2 arcsec, Clear, Winds Light & Variable
   Mid: Seeing 1.3 arcsec, Clear, Winds Light & Variable
   End: Seeing 1 arcsec, Clear, Winds Light & Variable

Observing Summary:

Observed four BAL QSOs for 1.5-2 hr each.
Pretty good conditions all night.

As a matter of information, it seems not possible to obtain
usable bias frames during the day because the dome is not
dark enough and the CCDS has light leaks.   Flats in the
blue-UV are problematic as well.  On the other hand,
the bias is so featureless that bias frames are not
needed to reduce the data.

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Submitted on 2010 Mar 13 [6:22:31]