500 citations · 4.8k across the 143 of their papers we have counts for
8 papers · 1 filter
Probing the photoionised outflow in the NLS1 Ark 564: An XMM-Newton view
Shourya Khanna, Jelle. S. Kaastra, Missagh Mehdipour
We present a detailed analysis of xmm X-ray observations of the Narrow line Seyfert-1 (NLS1) galaxy Ark 564 taken between 2000 and 2011. High-resolution X-ray spectroscopy is carri…
Anatomy of the AGN in NGC 5548: V. A clear view of the X-ray narrow emission lines
M. Whewell, G. Branduardi-Raymont, J. S. Kaastra +15
Context. Our consortium performed an extensive multi-wavelength campaign of the nearby Seyfert 1 galaxy NGC 5548 in 2013-14. The source appeared unusually heavily absorbed in the s…
Line absorption of He-like triplet lines by Li-like ions. Caveats of using line ratios of triplets for plasma diagnostics
M. Mehdipour, J. S. Kaastra, A. J. J. Raassen
He-like ions produce distinctive series of triplet lines under various astrophysical conditions. However, this emission can be affected by line absorption from Li-like ions in the…
Anatomy of the AGN in NGC 5548 IV. The short-term variability of the outflows
L. Di Gesu, E. Costantini, J. Ebrero +16
During an extensive multiwavelength campaign that we performed in 2013-14 the prototypical Seyfert 1 galaxy NGC 5548 has been found in an unusual condition of heavy and persistent…
The Swift-UVOT ultraviolet and visible grism calibration
N. P. M. Kuin, W. Landsman, A. A. Breeveld +16
We present the calibration of the Swift UVOT grisms, of which there are two, providing low-resolution field spectroscopy in the ultraviolet and optical bands respectively. The UV g…
Anatomy of the AGN in NGC 5548: III. The high-energy view with NuSTAR and INTEGRAL
F. Ursini, R. Boissay, P. -O. Petrucci +15
We describe the analysis of the seven broad-band X-ray continuum observations of the archetypal Seyfert 1 galaxy NGC 5548 that were obtained with XMM-Newton or Chandra, simultaneou…