Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.7k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR2.3k papers
- Charles UniversityCZ2.3k papers
- Institute for High Energy PhysicsES2.3k papers
- Institut de Recherche sur les Lois Fondamentales de l'UniversFR2.2k papers
- The Ohio State UniversityUS2.1k papers
- Universidad Autónoma de MadridES2.1k papers
- Rutherford Appleton LaboratoryGB2.1k papers
- European Organization for Nuclear ResearchCH2.1k papers
- University of Wisconsin–MadisonUS2.1k papers
- Joint Institute for Nuclear ResearchRU2k papers
18 papers · 2 filters
Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
Alan P. Marscher
The author presents a model for variability of the flux and polarization of blazars in which turbulent plasma flowing at a relativistic speed down a jet crosses a standing conical…
The 3 Ms Chandra Campaign on Sgr A*: A Census of X-ray Flaring Activity from the Galactic Center
J. Neilsen, M. A. Nowak, C. Gammie +14
Over the last decade, X-ray observations of Sgr A* have revealed a black hole in a deep sleep, punctuated roughly once per day by brief flares. The extreme X-ray faintness of this…
Analyzing polarization swings in 3C 279
S. Kiehlmann, T. Savolainen, S. G. Jorstad +53
Quasar 3C 279 is known to exhibit episodes of optical polarization angle rotation. We present new, well-sampled optical polarization data for 3C 279 and introduce a method to disti…
MAGIC observations and multifrequency properties of the Flat Spectrum Radio Quasar 3C 279 in 2011
J. Aleksić, S. Ansoldi, L. A. Antonelli +168
We study the multifrequency emission and spectral properties of the quasar 3C 279. We observed 3C 279 in very high energy (VHE, E>100GeV) gamma rays, with the MAGIC telescopes duri…
The innermost regions of the jet in NRAO 150. Wobbling or internal rotation?
Sol N. Molina, I. Agudo, J. L. Gómez
NRAO 150 is a very bright millimeter to radio quasar at redshift =1.52 for which ultra-high-resolution VLBI monitoring has revealed a counter-clockwise jet-position-angle wobbli…
The TeV blazar Markarian 421 at the highest spatial resolution
M. G. Blasi, R. Lico, M. Giroletti +14
We report the results obtained for the AGN Markarian 421 by model-fitting the data in the visibility plane, studing the proper motion of jet components, the light curve, and the sp…
Comparison of time/phase lags in the hard state and plateau state of GRS 1915+105
Mayukh Pahari, Joseph Neilsen, J S Yadav +2
We investigate the complex behavior of energy- and frequency-dependent time/phase lags in the plateau state and the radio-quiet hard state of GRS 1915+105. In our timing analysis,…
The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT
C. M. Raiteri, M. Villata, F. D'Ammando +4
Since the launch of the Fermi satellite, BL Lacertae has been moderately active at gamma-rays and optical frequencies until May 2011, when the source started a series of strong fla…
Dissecting X-ray-emitting Gas around the Center of our Galaxy
Q. D. Wang, M. A. Nowak, S. B. Markoff +16
Most supermassive black holes (SMBHs) are accreting at very low levels and are difficult to distinguish from the galaxy centers where they reside. Our own Galaxy's SMBH provides a…
The effects of thermodynamic stability on wind properties in different low mass black hole binary states
Susmita Chakravorty, Julia Lee, Joseph Neilsen
We present a systematic theory-motivated study of the thermodynamic stability condition as an explanation for the observed accretion disk wind signatures in different states of low…
A Chandra/HETGS Census of X-ray Variability From Sgr A* During 2012
J. Neilsen, M. A. Nowak, C. Gammie +13
We present the first systematic analysis of the X-ray variability of Sgr A* during the Chandra X-ray Observatory's 2012 Sgr A* X-ray Visionary Project (XVP). With 38 High Energy Tr…
A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3
Svetlana G. Jorstad, Alan P. Marscher, Paul S. Smith +42
We analyze the multifrequency behavior of the quasar 3C 454.3 during three prominent γ-ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn. The data reveal a repeating pattern…
Polarization structure in the core of 1803+784: a signature of recollimation shocks?
T. V. Cawthorne, S. G. Jorstad, A. P. Marscher
The extragalactic radio source 1803+784 is a BL Lac object that shows rapid variability and strong linear polarization. Very long baseline interferometry observations reveal that t…
An X-Ray View of the Jet-Cycle in the Radio Loud AGN 3C120
Anne M. Lohfink, Christopher S. Reynolds, Svetlana G. Jorstad +10
We present a study of the central engine in the broad-line radio galaxy 3C120 using a multi-epoch analysis of a deep XMM-Newton observation and two deep Suzaku pointings (in 2012).…
Fine-scale structure of the quasar 3C 279 Measured with 1.3 mm very long baseline interferometry
Ru-Sen Lu, Vincent L. Fish, Kazunori Akiyama +30
We report results from 5-day VLBI observations of the well-known quasar 3C 279 at 1.3 mm (230 GHz) in 2011. The measured nonzero closure phases on triangles including stations in A…
The Case for Massive, Evolving Winds in Black Hole X-ray Binaries
Joseph Neilsen
In the last decade, high-resolution X-ray spectroscopy has revolutionized our understanding of the role of accretion disk winds in black hole X-ray binaries. Here I present a brief…
The Outburst of the Blazar S5 0716+71 in 2011 October: Shock in a Helical Jet
V. M. Larionov, S. G. Jorstad, A. P. Marscher +8
We present the results of optical (R band) photometric and polarimetric monitoring and Very Long Baseline Array (VLBA) imaging of the blazar S5 0716+714 along with Fermi gamma-ray…
Electron acceleration to relativistic energies at a strong quasi-parallel shock wave
A. Masters, L. Stawarz, M. Fujimoto +9
Electrons can be accelerated to ultrarelativistic energies at strong (high-Mach number) collisionless shock waves that form when stellar debris rapidly expands after a supernova. C…