Night report 2025-05-20

Night report 2025/05/20

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

TO: Duncan Castex (ESO)

Support:  Janet's group

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

Start: 22:50UT | Humidity: 10.0% | Wind speed: 3.1 m/s | Seeing: 0.7''

Middle: 03:49UT | Humidity: 16.0% | Wind speed: 2.9 m/s | Seeing: 0.5'' (Thin clouds at low elevation)

End:  10:00UT | Humidity: 12.0% | Wind speed:  2.2 m/s | Seeing: 0.6'' (Thin clouds)

Calibrations: 

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

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

Notes

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