Night report 2025-05-25

Night report 2025/05/25

Observers: Stefano Pio Cosentino (University of Catania), Callum Francis Aster (Cardiff University)

TO: Cecilia Farias (ESO)

Support:  Janet's group

TAT: Lluís Galbany, Dragana Ilic

Start: 23:27UT | Humidity: 23.0% | Wind speed: 6.5  m/s | Seeing: 1.4'' (Some thin clouds)

Middle: 05:17UT | Humidity: 19.0% | Wind speed: 6.2 m/s | Seeing: 1.1'' (Some thin clouds) 

End:  10:00UT | Humidity: 20.0% | Wind speed:  6.1 m/s | Seeing: 1.1'' 

Calibrations: 

Dark, arc-lamps and dome flats were taken in the afternoon and the morning.

Sky flats were taken in the evening (filters: grz). UBVRi sky flats were taken in the morning.

Notes

Tonight we have worse seeing around 1.2″, oscillating between 0.7" and 1.6". Only when it raised above 1.3" we have changed the 1″ slit to 1.5″. This occurred for 6 objects.