50 citations · 144 across the 5 of their papers we have counts for
8 papers
Extreme ultra-soft X-ray variability in an eROSITA observation of the Narrow-Line Seyfert 1 Galaxy 1H 0707-495
Th. Boller, T. Liu, P. Weber +9
The ultra-soft narrow-line Seyfert 1 galaxy 1H 0707-495 is a well-known and highly variable active galactic nucleus (AGN), with a complex, steep X-ray spectrum, and has been studie…
A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties
Sophia G. H. Waddell, Luigi C. Gallo
A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxies observed with Suzaku is presented. The final sample consists of 22 NLS1s and 47 BLS1s, for a total of 69 AGN…
Uncovering the primary X-ray emission and possible starburst component in the polarized NLS1 Mrk 1239
Margaret Z. Buhariwalla, Sophia G. H. Waddell, Luigi C. Gallo +2
X-ray observations of the unique NLS1 galaxy Mrk 1239 spanning 18-years are presented. Data from XMM-Newton, Suzaku, Swift and NuSTAR are combined to obtain a broad-band, multi-epo…
Multi-epoch X-ray spectral analysis of the narrow-line Seyfert 1 galaxy Mrk 478
S. G. H. Waddell, L. C. Gallo, A. G. Gonzalez +2
A multi-epoch X-ray spectral and variability analysis is conducted for the narrow-line Seyfert 1 (NLS1) active galactic nucleus (AGN) Mrk 478. All available X-ray data from XMM-New…
The nature of the soft-excess and spectral variability in the Seyfert 1 galaxy Zw 229.015
S. Tripathi, S. G. H. Waddell, L. C. Gallo +2
We have carried out a systematic analysis of the nearby (z=0.0279) active galaxy Zw 229.015 using multi-epoch, multi-instrument and deep pointed observations with XMM-Newton, Suzak…
Nuclear spallation in active galaxies
L. C. Gallo, J. S. Randhawa, S. G. H. Waddell +3
A number of works point to the presence of narrow emission features at unusual energies in the X-ray spectra of active galactic nuclei (AGN) or to potentially low iron abundances a…