UBVRI photometry of active galaxies. I. Observations.
Abstract
A total of 693 UBVRI photoelectric observations for 91 active galaxies are reported. These observations were secured as part of a one-year monitoring program. Objects are classified in three classes according to their degree of variability; 52 percent of the galaxies did not show a significant variability (class 1); 12 percent showed some variations (class 2); and 35 percent displayed significant variations (class 3). A comparison with four other sets of photometric values is carried out.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- March 1987
- Bibcode:
- 1987A&AS...68..383H
- Keywords:
-
- Active Galaxies;
- Astronomical Catalogs;
- Astronomical Spectroscopy;
- Galactic Structure;
- Ubv Spectra;
- Electrophotometry;
- Galactic Nuclei;
- Statistical Analysis;
- Astronomy