Strong gravitational lensing of quasars has the potential to unlock the poorly understood
physics of these fascinating objects, as well as serve as a probe of the lensing mass …

We present a reanalysis of reverberation mapping data from 2005 for the Seyfert galaxy
NGC 4151, supplemented with additional data from the literature to constrain the continuum …

We perform a systematic survey of active galactic nuclei (AGNs) continuum lags using∼ 3
days cadence gri-band light curves from the Zwicky Transient Facility. We select a sample of …

We present the main results from a long-term reverberation mapping campaign carried out
for the Seoul National University AGN Monitoring Project (SAMP). High-quality data were …

The correlation between the broad line region radius and continuum luminosity (R–L
relation) of active galactic nuclei (AGNs) is critical for single-epoch mass estimates of …

Changing-look active galactic nucleus NGC 4151, which has attracted a lot of attention, is
undergoing the second dramatic outburst stage in its evolutionary history. To investigate the …

We present the results of a four-year velocity-resolved reverberation mapping (RM)
campaign of the changing-look active galactic nucleus (CL-AGN) NGC 4151 during its …

Broad emission lines of active galactic nuclei (AGNs) originate from the broad-line region
(BLR), consisting of dense gas clouds in orbit around an accreting supermassive black hole …

We conduct a reverberation mapping (RM) campaign to spectroscopically monitor a sample
of selected bright active galactic nuclei with large anticipated broad-line region (BLR) sizes …

Context. FeII emission is a well-known contributor to the UV spectra of active galactic nuclei
and the modeling of this part may affect the results obtained for the MgII λ2800 emission …