UBVRI night sky brightness at Kottamia Astronomical Observatory.

ABSTRACT: Photoelectric observations of night sky brightness (NSB) at different zenith distances and azimuths, covering all the sky, at the Egyptian Kottamia Astronomical observatory (KAO) site of coordinates ϕ = 29° 55.9' N and λ = 31° 49.5' E, were done using a fully automated photoelectric photometer (FAPP). The Bessel wide range system (UBVRI) is used for the first time to observe NSB for three consecutive nights (1-3 August, 2022) under good seeing conditions after the moon sets. The deduced results were taken in photons and converted into mag/arcsec². The average zenith sky brightness for U, B, V, R and I filters are found to be 20.49, 20.38, 19.41, 18.60 and 17.94 mag/arcsec² respectively. The average color indices (U-B), (B-V), (V-R) and (R-I), at the zenith are detecte

SUBMITTER: Aboushelib MF 

PROVIDER: S-EPMC10556021 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature