A

David

Darling

broadband photometry

Broadband photometry is photometry carried out using filters with a bandwidth of 30 to 100 nanometers. Various systems have been developed including Johnson photometry, Krons-Cousins RI photometry, and RGU photometry. It is used instead of narrowband photometry or intermediate-band photometry in studies, such as star counts, in which it is important to observe fainter stars.