Night report 2025-08-10

Night report 2025/08/10

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

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

TAT: Giuliano Pignata, Amar Aryan, Michel Dennefeld.

Start (23:00 UT): humidity 9.0%, temperature 13.8 ºC, wind speed 2.7 m/s, seeing 1.1'', airmass 1.03.

Middle (05:16 UT): humidity 6.0%, temperature 14.5 ºC, wind speed 2.7m/s, seeing 1.0'', airmass 1.15.

End (10:02 UT): humidity 5.0%, temperature 15.0 ºC, wind speed 1.0 m/s, seeing 1.1'', airmass 1.39.

Comments: Evening skyflats could not be taken because of thin clouds in the west which were visible at the beginning of the night. However, inspection of the sky camera showed little clouds overnight, and we never lost the guide star, so the night was at least "clear". Seeing was relatively stable throughout the night around 1.0". 

Calibrations: Bias and arcs in the evening + morning skyflat grz