Night report 2025-05-21

Night report 2025/05/21

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

TO: Cecilia Farias (ESO)

Support:  Janet's group

TAT: Eduardo Concepcion (Nova Gorica), Sara Faris, Michel Dennefeld

Start: 23:10UT | Humidity: 16.0% | Wind speed: 1.8 m/s | Seeing: 0.4'' (Thin clouds at low elevation)

Middle: 04:37UT | Humidity: 14.0% | Wind speed: 4.2 m/s | Seeing: 0.7'' 

End:  09:49UT | Humidity: 15.0% | Wind speed:  3.4 m/s | Seeing: 0.8'' 

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

Seeing was good around .6″, so we used the 1″ slit in most observations.