324 citations
- The Ohio State UniversityUS34 papers
- Center for Astrophysics Harvard & SmithsonianUS29 papers
- Max Planck Institute for Radio AstronomyDE28 papers
- Space Telescope Science InstituteUS27 papers
- Tel Aviv UniversityIL20 papers
- University of CopenhagenDK20 papers
- European Space Astronomy CentreES19 papers
- Goddard Space Flight CenterUS18 papers
- Pennsylvania State UniversityUS18 papers
- Carnegie ObservatoriesUS17 papers
- Johns Hopkins UniversityUS17 papers
- University of PaduaIT17 papers
4 papers · 2 filters
Broad-line region structure and line profile variations in the changing look AGN HE1136-2304
W. Kollatschny, M. W. Ochmann, M. Zetzl +5
A strong X-ray outburst was detected in HE1136-2304 in 2014. Accompanying optical spectra revealed that the spectral type has changed from a nearly Seyfert 2 type (1.95), classifie…
Long-term optical, UV, and X-ray continuum variations in the changing-look AGN HE 1136-2304
M. Zetzl, W. Kollatschny, M. W. Ochmann +6
A strong outburst in the X-ray continuum and a change of its Seyfert spectral type was detected in HE 1136-2304 in 2014. The spectral type changed from nearly Seyfert 2 type (1.95)…
A Multi-Frequency Study of the Milky Way-like Spiral Galaxy NGC 6744
Miranda Yew, Miroslav D. Filipović, Quentin Roper +14
We present a multi-frequency study of the intermediate spiral SAB(r)bc type galaxy NGC 6744, using available data from the Chandra X-Ray telescope, radio continuum data from the Au…
Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies
M. M. Fausnaugh, D. A. Starkey, Keith Horne +69
We present optical continuum lags for two Seyfert 1 galaxies, MCG+08-11-011 and NGC 2617, using monitoring data from a reverberation mapping campaign carried out in 2014. Our light…