3 citations · 5 across the 5 of their papers we have counts for
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Searching for Narrow Emission Lines in X-ray Spectra: Computation and Methods
Taeyoung Park, David A. van Dyk, Aneta Siemiginowska
The detection and quantification of narrow emission lines in X-ray spectra is a challenging statistical task. The Poisson nature of the photon counts leads to local random fluctuat…
Chandra Reveals Twin X-ray Jets in the Powerful FR-II Radio Galaxy 3C353
J. Kataoka, L. Stawarz, D. E. Harris +7
We report X-ray imaging of the powerful FR-II radio galaxy 3C353 using the Chandra X-ray Observatory. 3C353's two 4"-wide and 2'-long jets allow us to study in detail the internal…
X-ray Properties of the GigaHertz-Peaked and Compact Steep Spectrum Sources
Aneta Siemiginowska, Stephanie LaMassa, Thomas L. Aldcroft +2
We present {\it Chandra} X-ray Observatory observations of Giga-Hertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources. The {\it Chandra} sample contains 13 qua…
The nature of the intranight variability of radio-quiet quasars
B. Czerny, A. Siemiginowska, A. Janiuk +1
We select a sample of 10 radio-quiet quasars with confirmed intranight optical variability and with available X-ray data. We compare the variability properties and the broad band s…
Observational Constraints on the Dependence of Radio-Quiet Quasar X-ray Emission on Black Hole Mass and Accretion Rate
Brandon C. Kelly, Jill Bechtold, Jonathan R. Trump +2
In this work we use a sample of 318 radio-quiet quasars (RQQ) to investigate the dependence of the ratio of optical/UV flux to X-ray flux, alpha_ox, and the X-ray photon index, Gam…
The Highest Redshift Relativistic Jets
C. C. Cheung, L. Stawarz, A. Siemiginowska +5
We describe our efforts to understand large-scale (10's-100's kpc) relativistic jet systems through observations of the highest-redshift quasars. Results from a VLA survey search f…