Night Report 2021-05-20

Observers: Miika Pursiainen, Panos Charalampopoulos

Support: Giorgos Leloudas, Emmy Paraskeva

TAT: Claudia Gutierrez, Janet Chen, Georgios Dimitriadis

EFOSC Calibrations:

Bias, dome_flats, arcs taken in the afternoon.

Start: Humidity > 90%, thick clouds

Middle: Humidity > 90%, thinner thick clouds

End: Humidity > 90%, thinner thick clouds

Comments:

Sunset twilight: 23:19 UT

Telescope closed

Sunrise twilight: 9:59 UT