activity
20002026
most citedStochastic Modeling of the Fermi/LAT Gamma-ray Blazar Variability

88 citations · 474 across the 19 of their papers we have counts for

collaborators

19 papers

astro-ph.IM2026

CIAO: Chandra's Data Analysis System for X-Ray Astronomy and Beyond

Antonella Fruscione, Jonathan McDowell, Douglas Burke +13

The Chandra Interactive Analysis of Observations (CIAO) software, developed by the Chandra X-ray Center, has been the data analysis package for the Chandra X-ray Observatory since…

astro-ph.GA2025

Chandra X-ray Observatory study of the X-ray emission of PKS 0023-26 and comparison with recent ALMA results

A. Siemiginowska, R. Morganti, G. Fabbiano +4

We present a deep high-resolution Chandra X-ray Observatory image data of a powerful compact radio source PKS 0023-26 associated with a quasar at redshift 0.322. The earlier studie…

astro-ph.GA2025

Truncations in the X-ray Halos of Early-Type Galaxies as a Tracer of Feedback and Mergers

Nushkia Chamba, Pamela M. Marcum, Alejandro S. Borlaff +2

The morphology of X-ray halos in early-type galaxies depends on key structure assembly processes such as feedback and mergers. However, the signatures of these processes are diffic…

astro-ph.GA2025

Exploring Compact Symmetric Objects with Complex Morphologies

E. E. Sheldahl, G. B. Taylor, S. E. Tremblay +9

Compact symmetric objects (CSOs) are a unique class of jetted active galactic nuclei (AGN) defined by sub-kpc radio emission, showing radio structure on both sides of the central e…

astro-ph.HE2024

The Radio Spectra of High Luminosity Compact Symmetric Objects (CSO-2s): Implications for Studies of Compact Jetted Active Galactic Nuclei

P. V. de la Parra, A. C. S Readhead, T. Herbig +18

This paper addresses, for the first time, a key aspect of the phenomenology of Compact Symmetric Objects (CSOs) -- the characteristics of their radio spectra. We present a radio-sp…

astro-ph.GA2024

SAUNAS II: Discovery of Cross-shaped X-ray Emission and a Rotating Circumnuclear Disk in the Supermassive S0 Galaxy NGC 5084

Alejandro S. Borlaff, Pamela M. Marcum, Pasquale Temi +11

Combining Chandra, ALMA, EVLA, and Hubble Space Telescope archival data and newly acquired APO/DIS spectroscopy, we detect a double-lobed 17~kpc X-ray emission with plumes oriented…

astro-ph.GA2024

SAUNAS I: Searching for Low Surface Brightness X-ray Emission with Chandra/ACIS

Alejandro S. Borlaff, Pamela M. Marcum, Mehmet Alpaslan +8

We present SAUNAS (Selective Amplification of Ultra Noisy Astronomical Signal), a pipeline designed for detecting diffuse X-ray emission in the data obtained with the Advanced CCD…

astro-ph.HE2023★ 3 cited

Compact Symmetric Objects -- II Confirmation of a Distinct Population of High-Luminosity Jetted Active Galaxies

S. Kiehlmann, A. C. S. Readhead, S. O'Neill +10

Compact Symmetric Objects (CSOs) are compact (<1 kpc), jetted Active Galactic Nuclei (AGN), whose jet axes are not aligned close to the line of sight, and whose observed emission i…

astro-ph.HE2017★ 15 cited

A Multi-band Study of the remarkable Jet in Quasar 4C+19.44

Daniel Harris, Nicholas Lee, Dan Schwartz +14

We present arc-second-resolution data in the radio, IR, optical and X-ray for 4C+19.44 (=PKS 1354+195), the longest and straightest quasar jet with deep X-ray observations. We repo…

astro-ph.HE2015★ 35 cited

Serendipitous discovery of an extended X-ray jet without a radio counterpart in a high-redshift quasar

A. Simionescu, Ł. Stawarz, Y. Ichinohe +6

A recent Chandra observation of the nearby galaxy cluster Abell 585 has led to the discovery of an extended X-ray jet associated with the high-redshift background quasar B3 0727+40…

astro-ph.GA2014★ 19 cited

On the Interaction of the PKS B1358-113 Radio Galaxy with the Abell 1836 Cluster

L. Stawarz, A. Szostek, C. C. Cheung +9

[abridged] Here we present the analysis of multifrequency data gathered for the FRII radio galaxy PKS B1358-113, hosted in the brightest cluster galaxy of Abell 1836. The galaxy ha…

astro-ph.HE2014★ 88 cited

Stochastic Modeling of the Fermi/LAT Gamma-ray Blazar Variability

Malgorzata A. Sobolewska, Aneta Siemiginowska, Brandon C. Kelly +1

We study the gamma-ray variability of 13 blazars observed with the Fermi Large Area Telescope (LAT). These blazars have the most complete light curves collected during the first 4…

astro-ph.HE2013★ 41 cited

Jet Emission in Young Radio Sources: a Fermi-LAT Gamma-ray View

Giulia Migliori, Aneta Siemiginowska, Brandon C. Kelly +3

We investigate the contribution of the beamed jet component to the high energy emission in young and compact extragalactic radio sources, focusing for the first time on the gamma-r…

astro-ph.CO2012★ 36 cited

Giant Lobes of Centaurus A Radio Galaxy Observed with the Suzaku X-ray Satellite

L. Stawarz, Y. T. Tanaka, G. Madejski +15

[abridged] We report on Suzaku observations of selected regions within the Southern giant lobe of the radio galaxy Centaurus A. We focus on distinct X-ray features likely associate…

astro-ph.CO2012★ 66 cited

The nature of the jet-driven outflow in the radio galaxy 3C305

M. J. Hardcastle, F. Massaro, D. E. Harris +6

We present Chandra X-ray and VLA radio observations of the radio galaxy 3C305. The X-ray observations reveal the details of the previously known extended X-ray halo around the radi…

astro-ph.HE2010★ 36 cited

A Flare in the Jet of Pictor A

H. L. Marshall, M. J. Hardcastle, M. Birkinshaw +11

A Chandra X-ray imaging observation of the jet in Pictor A showed a feature that appears to be a flare that faded between 2000 and 2002. The feature was not detected in a follow-up…

astro-ph.CO2009★ 67 cited

The X-ray view of Giga-Hertz Peaked Spectrum Radio Galaxies

Olof Tengstrand, M. Guainazzi, A. Siemiginowska +5

This paper presents the X-ray properties of a flux- and volume-limited complete sample of 16 Giga-Hertz Peaked Spectrum (GPS) galaxies. This study addresses three basic questions i…

astro-ph2008★ 4 cited

A Deep XMM-Newton Observation of the Quasar 3C 287

G. Salvesen, J. M. Miller, E. Cackett +1

We report on an XMM-Newton observation of the z=1.055 quasar and Giga-hertz Peaked Spectrum (GPS) source 3C 287. Our 62.3 ksec observation provides an exceptional X-ray view of a p…

astro-ph2000★ 64 cited

Chandra study of an overdensity of X-ray sources around two distant (z~0.5) clusters

M. Cappi, P. Mazzotta, M. Elvis +21

We present results from a Chandra X-ray Observatory study of the field X-ray source populations in 4 different observations: two high-redshift (z~0.5) clusters of galaxies 3C295 an…