Spectral and photometric monitoring of Seyfert galaxies and quasars in 1998. 1. observations
Аннотация
Abstract In 1998, a few groups of astronomers from the Former Soviet Union (FSU), Europe and Mexico carried out observations of the nuclei in 11 Seyfert galaxies and quasars with different telescopes for a common programme of optical monitoring (Bochkarev and Shapovalova, 1999). The CCD spectral observations were carried out with the 6 m and 1 m telescopes of SAO RAS (Russia) and the 2.1 m telescope of Cananea Observatory (Mexico) in the range between 4000Å and 8000Å with a resolution of 3–15Å and a signal-to-noise ratio S/N = 50 for the continuum in the Hβ and Hα regions. About 500 spectra were obtained but have been only preliminarily processed. Consequently we report just preliminary, mainly qualitative results. The spectra of a few objects are presented as an illustration of the variations observed during the year and to compare the observational data acquired with the different telescopes. The broad-band optical monitoring with UBVR filters (accuracy 1% in the R band) was carried out at four observatories. The data of photometric monitoring in BVR bands with the 1 m and 60 cm telescopes of SAO with the use of a CCD camera with a 10 arcsec aperture are presented. The variations of Hβ emission line profiles of NGC 4151, NGC 5548, Arp 102-B, E 1821+643 and 3C 390.3 are investigated. We have shown that in all objects the Hβ broad emission line or some of their components possibly originated in an accretion disk.