Night report 2025-04-13

Night report 2025-04-13:

Observers: Christina Humina, Niko Pyykkinen

Support: Timo Kravtsov, Christian Vassallo, Niilo Koivisto

TAT: João Duarte, Gonçalo Martins and Rita Santos
  Jesper Sollerman, Giuliano Pignata, Tanja Petrushevska, (and Dragana Ilic)

We started late due to testing the shutter. The shutter is now working, but we have to avoid having the instrument in a certain position. 

Start 00.41 (UT): Humidity: 30.9% Temperature: 12.7 Wind speed: 10.2 m/s DIMM seeing: 0.8''
Middle 05.37 (UT): Humidity: 31 % Temperature: 11.8 Wind speed: 9.2 m/s DIMM seeing: 1.11''
End 09.30 (UT) : Humidity: 30 % Temperature: 11.8 Wind speed: 13 m/s DIMM seeing: 6''

Calibrations: evening: bias and spec arcs (11,13,16,18,20) morning: spec arcs(11,13,16,18,20), domeflats (11,13,16,18,20) and skyflats in grz

We started the night with seeing around 1'', which then seemed to oscillate around 1.5'' during the middle and end of the night. At the end of the night, the wind speed picked up and restricted our target selection. Due to this, we were not able to observe our last target.