LBT OSU/RC Queue Observing: UTC 2009 March 26

Observers: Ondrej Pejcha, Paul Martini
TO: Wayne Wack
AA: Olga Kuhn

Summary: Technical problems with the telescope AZ drive prevented operation 
until 10pm. This was ultimately traced to a problem with an electronics 
board. In addition, there were some problems with the chillers and to 
minimize the load on them the mirror ventilation was only run on one mirror 
at a time for the whole night. The seeing was generally between 1.5" and 2.0", 
although it increased at the end of the night. The elevation drive was also 
sticking at the end of the night, which caused tracking to fail on some 
exposures. About 4 hours lost due to technical problems. 

There was some cirrus at the start of the night, but it was clear at dawn. 

Observed:
N4258, N4449, N3077, N4236, N4605, N4736, GRB080310, N6946, Flats in 
Uspec and r-SLOAN 

Detailed notes:

UT 0000

Bias frames. 

UT 0630

N4258. Seeing about 1.2". First blue channel image trailed due to the 
same derotator bug observed on previous nights.

UT 0715

N4449. Seeing about 1.4", slightly worse for the blue channel.

UT 0800

N3077. Seeing about 2.0".

UT 0815

N4236. Seeing about 1.8".

UT 0845

N4605. Seeing in red channel about 1.5", slightly worse in blue.

UT 0915

N4736. First red image trailed. Seeing about 1.5".

UT 0945

GRB080310. Seeing at 1.5"-1.6", slightly worse at the end of OB.

UT 1045

Problems with tracking caused by stuck elevation drive.

UT 1130

N6946. Seeing varied between 2.0" and 3.0".

UT 1245

Flat fields in Uspec, r-SLOAN