B. Rocca-Volmerange, and H. Sol (eds)
EAS Publications Series, 1 (2001) 187–190
Optical Monitoring of Seyfert Galaxies and Quasar Nuclei in 1998. I. Observations
The variations of emission-line profiles of NGC 4151, NGC 5548, 3C 390.3, Arp 102-B and E1821+643 in 1998 are being investigated.
© EAS, EDP Sciences 2002