Night report 2025-08-08

Night report 2025/08/08

Observers: Joyce Naomi Dominique van Dalen  and  Daniele Bjørn Malesani.

Support:  Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter.

TAT: Lluis Galbany, Tanja Petrushevska, Shubham Srivastav.

Start (23:08 UT): humidity 28.0%, temperature 9.2 ºC, wind speed 5.7 m/s, seeing 1.7'', airmass 1.04.

Middle (04:51 UT): humidity 12.0%, temperature 10.9 ºC, wind speed 10.7m/s, seeing 1.4'', airmass 1.26.

End (10:00 UT): humidity 7.0%, temperature 11.4 ºC, wind speed 12.7 m/s, seeing 1.6'', airmass 1.4. 

Comments: No clouds during the night. Seeing was variable and moderately high on average during the full night. Wind speeds increased at ~6:00 UT which resulted in pointing restrictions to the north east from this time onwards.

Calibrations: bias, arcs for Grism 11, 13, and 16, and UVBRi evening skyflats were taken.