Night report 2025-05-01

Night report 2025/05/01

Observers: Catalina Casanueva (Pontificia Universidad Católica de Chile), Bastián Ayala (Universidad Andrés Bello)

Support:  Raya Dastidar (Universidad Andrés Bello), Amit Kumar (University of London)

TAT: Thallis de Lourenço Pessi (ESO), Shubham Srivastav (University of Oxford), Giuliano Pignata (Universidad de Tarapacá)

Start: 23:04UT | Humidity: 22% | Wind speed: 9.5 m/s | Seeing: 0.4''

End:  10:04UT | Humidity: 17% | Wind speed:  10 m/s | Seeing: 1.5'' 

Afternoon Calibrations:

Darks and dome flats were taken in the afternoon.

Sky flats were taken in the evening (filters: BVRI).

Notes

We used the 1.5'' slit, following the standard seeing measurement. When the seeing dropped below 1.5'' (at 7:26UT), we switched back to the 1'' slit. 

Seeing was highly unstable during the night (see image below).