395 citations · 1.1k across the 30 of their papers we have counts for
32 papers
X-ray grating spectroscopy as a mission enhancement
Hans Moritz Guenther, Ehud Behar, Joel N. Bregman +27
We propose to add instruments to any potential future X-ray mission with focussing optics that is considered in NASA's ASTRA framework. Such an instrument is a necessity to study A…
A magnetically-supported disk-corona model for Changing-Look AGN transitions
Marios Kouzis, Agata Różańska, Debora Lančová +2
Changing-Look Active Galactic Nuclei (CLAGN) undergo dramatic spectral and luminosity transitions on timescales of months to a few years -- orders of magnitude shorter than the vis…
Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K X-ray Line Flux Variations Using Photo-Ionization Simulations
Tek P. Adhikari, Santanu Mondal, Zhicheng He +2
Significant variability in broad emission line strengths of active galactic nuclei (AGN) over months to years has been observed, often accompanied by intrinsic continuum changes. S…
Markarian 590: The AGN Awakens
Biswaraj Palit, Marzena Śniegowska, Alex Markowitz +3
Changing-Look AGN (CLAGN) Mkn 590 recently underwent a sudden re-ignition, marked by substantial increases in optical/UV and X-ray continuum flux since last couple of years. Swift-…
X-ray view of dissipative warm corona in active galactic nuclei
B. Palit, A. Rozanska, P. O. Petrucci +8
In the X-ray spectra of AGNs, a noticeable excess of soft X-rays is typically detected beyond the extrapolation of the power-law trend observed between 2-10 keV. In the scenario of…
Influence of the gravitational darkening effect on the spectrum of a hot, rapidly rotating neutron star. II. Iron lines
Agnieszka Majczyna, Jerzy Madej, Agata Różańska +1
Rapidly rotating neutron stars are similar to highly flattened ellipsoids. Observed spectra of flattened stars must exhibit effects of non spherical shape and the gravitational dar…