Night Report 2021-05-21

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: Thick couds, humidity ~60%

Middle: No clouds, humidity ~35%, wind 5m/s, seeing ~2"

End: No clouds, humidity ~20%, seeing ~2"

Comments (times in UT):

Moon is bright during this subrun!!

23:00: Telescope closed due to thick clouds

23:19: Sunset twilight

23:30: Clouds getting thinner

23:55: Telescope opens

00:15: Issue with Telescope adaptor. Something to do with the guide probe. TOs are working hard to fix it.

00:35: Temporary fix found

04:00: Communication issue with the TO resulted in us believing we were observe in seeing <1.5" conditions, while in reality the seeing was >2.0". This in turn meant mistaken usage of slit of 1" for fmu and foa.

Sunrise twilight: 9:59 UT