Night report 2025-05-02

Night report 2025/05/02

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

Support:  Raya Dastidar (Universidad Andrés Bello), Anjasha Gangopadhyay (The Oskar Klein Centre for Cosmo Particle Physics)

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

Start: 23:22UT | Humidity: 17% | Wind speed: 4.0 m/s | Seeing: 1.5''

End:  09:51UT | Humidity: 9% | Wind speed:  5.5 m/s | Seeing: 1.2'' 

Afternoon Calibrations:

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

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

Notes

Seeing was mostly above 1.5″, so we switched from the 1″ to the 1.5″ slit in most observations and increased exposure times by ~20–30%.