Bibcode
Erkens, U.; Wagner, S. J.; Alloin, D.; Axon, D.; de Bruyn, A. G.; Clavel, J.; Goad, M. R.; Gondhalekar, P.; van Groningen, E.; Jackson, N.; Kollatschny, W.; Laurikainen, E.; Lawrence, A.; Masegosa, J.; O'Brien, P.; Penston, M. V.; Perez, E.; Perez-Fournon, I.; Robinson, A.; Rodriguez Espinosa, J. M.; Stirpe, G. M.; Tadhunter, C.; Terlevich, R.; Unger, S.
Bibliographical reference
Astronomy and Astrophysics, v.296, p.90
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4
1995
Journal
Citations
6
Refereed citations
6
Description
We present the results of a 6 month monitoring campaign of Mkn 876, a
low luminosity quasar with M_abs_=~-24. High resolution spectroscopy and
direct imaging in the Johnson filters B, V, R, I was carried out in the
first half of 1990. Line and continuum light curves are presented. Mkn
876 showed a decrease of 17% in the continuum over the whole observing
period whereas the line flux of Hβ and Hα stayed constant.
This implies, that the radius of the Broad Line Region is larger than 6
light months. Coadded spectra of Hβ and Hα are presented
which confirm an extreme asymmetry of the line profiles to the red. With
respect to much earlier spectra the line profiles changed considerably.