7.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Institute for AstrophysicsIT1.2k papers
- University of BolognaIT1.1k papers
- Centre National de la Recherche ScientifiqueFR830 papers
- Leiden UniversityNL562 papers
- University of PaduaIT461 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR449 papers
- Astrophysique, Instrumentation et ModélisationFR424 papers
- Center for Astrophysics Harvard & SmithsonianUS420 papers
- Netherlands Institute for Radio AstronomyNL418 papers
- Osservatorio Astronomico di PadovaIT411 papers
- Osservatorio astronomico di BolognaIT398 papers
- California Institute of TechnologyUS397 papers
41 papers · 2 filters
Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +290
We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1 which inc…
Synchrotron emission from the blazar PG 1553+113. An analysis of its flux and polarization variability
C. M. Raiteri, F. Nicastro, A. Stamerra +4
In 2015 July 29 - September 1 the satellite XMM-Newton pointed at the BL Lac object PG 1553+133 six times, collecting data for 218 hours. During one of these epochs, simultaneous o…
Multiwavelength variability study and search for periodicity of PKS 1510-089
G. Castignani, E. Pian, T. M. Belloni +14
Blazars are the most luminous and variable AGNs, and thus excellent probes of accretion and emission processes close to the central engine. We focus on PKS 1510-089 (), one…
Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113
H. E. S. S. Collaboration, :, H. Abdalla +332
The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monosc…
The second catalog of flaring gamma-ray sources from the Fermi All-sky Variability Analysis
S. Abdollahi, M. Ackermann, M. Ajello +124
We present the second catalog of flaring gamma-ray sources (2FAV) detected with the Fermi All-sky Variability Analysis (FAVA), a tool that blindly searches for transients over the…
SN 1978K: An evolved supernova outside our Local Group detected at millimetre wavelengths
S. D. Ryder, R. Kotak, I. A. Smith +3
Supernova 1978K is one of the oldest-known examples of the class of Type IIn supernovae that show evidence for strong interaction between the blast wave and a dense, pre-existing c…
Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +172
Context. PKS 1510-089 is one of only a few flat spectrum radio quasars detected in the VHE (very-high-energy, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and t…
SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1
A. Caccianiga, D. Dallacasa, S. Anton +4
We present VLBI observations, carried out with the European Very Long Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud narrow-line Seyfert 1 (RLNLS1)…
Swift observations of unidentified radio sources in the revised Third Cambridge Catalogue
A. Maselli, F. Massaro, G. Cusumano +7
We have investigated a group of unassociated radio sources included in the 3CR cat- alogue to increase the multi-frequency information on them and possibly obtain an identification…
The Chandra Survey of Extragalactic Sources in the 3CR Catalog: X-ray Emission from Nuclei, Jets, and Hotspots in the Chandra Archival Observations
F. Massaro, D. E. Harris, E. Liuzzo +8
As part of our program to build a complete radio and X-ray database of all the 3CR extragalactic radio sources, we present an analysis of 93 sources for which Chandra archival data…
The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
F. D'Ammando, M. Orienti, J. Finke +7
After a long low-activity period, a gamma-ray flare from the narrow-line Seyfert 1 PKS 1502+036 (z=0.4089) was detected by the Large Area Telescope (LAT) on board Fermi in 2015. On…
A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies
F. D'Ammando, M. Orienti, J. Finke +3
The discovery by the Large Area Telescope on board Fermi of variable gamma-ray emission from radio-loud narrow-line Seyfert 1 (NLSy1) galaxies revealed the presence of a possible t…
A shock in `El Gordo' cluster and the origin of the radio relic
A. Botteon, F. Gastaldello, G. Brunetti +1
We present an X-ray and radio study of the famous `El Gordo', a massive and distant () galaxy cluster. In the deep (340 ks) Chandra observation, the cluster appears with an…
Blazar Flaring Patterns (B-FlaP): Classifying Blazar Candidates of Uncertain type in the third Fermi-LAT catalog by Artificial Neural Networks
G. Chiaro, D. Salvetti, G. La Mura +3
The Fermi Large Area Telescope (LAT) is currently the most important facility for investigating the GeV -ray sky. With Fermi LAT more than three thousand -ray sources have be…
VLBA observations of radio faint Fermi-LAT sources above 10 GeV
R. Lico, M. Giroletti, M. Orienti +1
The first Fermi-LAT High-energy source catalog (1FHL), containing gamma-ray sources detected above 10 GeV, is an ideal sample to characterize the physical properties of the most ex…
The column density distribution of hard X-ray radio galaxies
F. Panessa, L. Bassani, R. Landi +6
In order to investigate the role of absorption in AGN with jets, we have studied the column density distribution of a hard X-ray selected sample of radio galaxies, derived from the…
Soft Gamma-ray selected radio galaxies: favouring giant size discovery
L. Bassani, T. Venturi, M. Molina +5
Using the recent INTEGRAL/IBIS and Swift/BAT surveys we have extracted a sample of 64 confirmed plus 3 candidate radio galaxies selected in the soft gamma-ray band. The sample cove…
An achromatic break in the afterglow of the short GRB 140903A: evidence for a narrow jet
E. Troja, T. Sakamoto, S. B. Cenko +17
We report the results of our observing campaign on GRB140903A, a nearby (z=0.351) short duration (T90~0.3 s) gamma-ray burst discovered by Swift. We monitored the X-ray afterglow w…
Fermi Large Area Telescope Detection of Extended Gamma-Ray Emission from the Radio Galaxy Fornax A
LAT Collaboration
We report the Fermi Large Area Telescope detection of extended gamma-ray emission from the lobes of the radio galaxy Fornax A using 6.1 years of Pass 8 data. After Centaurus A, thi…
Searching the Gamma-ray Sky for Counterparts to Gravitational Wave Sources: Fermi GBM and LAT Observations of LVT151012 and GW151226
J. L. Racusin, E. Burns, A. Goldstein +138
We present the Fermi Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) observations of the LIGO binary black hole merger event GW151226 and candi- date LVT151012. No can…
Minute-Timescale >100 MeV gamma-ray variability during the giant outburst of quasar 3C 279 observed by Fermi-LAT in 2015 June
LAT Collaboration
On 2015 June 16, Fermi-LAT observed a giant outburst from the flat spectrum radio quasar 3C 279 with a peak MeV flux of $\sim3.6\times10^{-5}\;{\rm photons}\;{\rm cm}^{-2}\;…
Fermi LAT Stacking Analysis of Swift Localized Gamma-ray Bursts
LAT Collaboration
We perform a comprehensive stacking analysis of data collected by the Fermi Large Area Telescope (LAT) of gamma-ray bursts (GRB) localized by the Swift spacecraft, which were not d…
EVN Observations of HESS J1943+213: Evidence for an Extreme TeV BL Lac Object
Kazunori Akiyama, Łukasz Stawarz, Yasuyuki T. Tanaka +3
We report on the 1.6 GHz (18 cm) VLBI observations of the unresolved, steady TeV source HESS J1943+213 located in the Galactic plane, performed with the European VLBI Network (EVN)…
Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations With the Fermi Large Area Telescope
LAT Collaboration
We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the -ray spectrum of NGC 1275, the central galaxy o…