306 citations · 806 across the 35 of their papers we have counts for
17 papers · 1 filter
Advancing Fundamental Physics and Cosmology with high-resolution X-ray imaging
Sara Turriziani, Herman L. Marshall, Daryl Haggard +4
Black Holes are the key to solving many unanswered questions in fundamental physics: in particular, the very extreme properties shown by supermassive black holes at the centers of…
Science of High Resolution X-ray Imaging
H. L. Marshall, K. Weaver, M. Schattenburg +34
This report summarizes potential studies of the Hi-ReX Science Analysis Group for an Ultra-High Angular Resolution X-ray Observatory. Many potential science cases are presented, sp…
PeV neutrons as origin of separated SS433 TeV signals
D. Fargion, P. G. De Sanctis Lucentini, S. Turriziani +2
The SS433, a well-known binary system with an internal black hole, have shown since half a century, an inner (a few year light distances) twin precessing jets spirals. These beams…
SS433 PeV neutron jet feeding the far TeV gamma beam
Daniele Fargion, Pier Giorgio De Sanctis Lucentini, Sara Turriziani +2
The SS433 is a well-known binary system with an internal black hole, which is stripping mass from an orbiting companion of ten solar masses, at a hundred of light-seconds away. The…
Over-abundant gamma-like signals around Solar disk shadows by twin bent and smeared muon and electron pairs secondaries, versus rare local TeV gamma
Daniele Fargion, Omar Tibolla, Pier Giorgio De Sanctis Lucentini +4
Cosmic rays with energies of tens of TeV and above, skimming the Sun, could fragment into pions. The resulting gamma photons and muons, as well as subsequent electron pairs, will r…
The first hard X-ray spectral catalogue of Blazars observed by NuSTAR
Riccardo Middei, Paolo Giommi, Matteo Perri +5
Blazars are a peculiar class of active galactic nuclei (AGNs) that enlighten the sky at all wavelengths. The electromagnetic emission of these sources is jet-dominated resulting in…
JEM-EUSO Collaboration contributions to the 37th International Cosmic Ray Conference
G. Abdellaoui, S. Abe, J. H. Adams +289
Compilation of papers presented by the JEM-EUSO Collaboration at the 37th International Cosmic Ray Conference (ICRC), held on July 12-23, 2021 (online) in Berlin, Germany.
X-ray spectra, light-curves and SEDs of blazars frequently observed by Swift
P. Giommi, M. Perri, M. Capalbi +19
Blazars research is one of the hot topics of contemporary extra-galactic astrophysics. That is because these sources are the most abundant type of extra-galactic gamma-ray sources…
The Open Universe survey of Swift-XRT GRB fields: a complete sample of HBL blazars
P. Giommi, Y. L. Chang, S. Turriziani +22
We have analysed all the X-ray images centred on Gamma Ray Bursts generated by Swift over the last 15 years using automatic tools that do not require any expertise in X-ray astrono…
Contributions to the 36th International Cosmic Ray Conference (ICRC 2019) of the JEM-EUSO Collaboration
G. Abdellaoui, S. Abe, J. H. Adams +309
Compilation of papers presented by the JEM-EUSO Collaboration at the 36th International Cosmic Ray Conference (ICRC), held July 24 through August 1, 2019 in Madison, Wisconsin.
Mini-EUSO engineering model: tests in open-sky condition
F. Bisconti, D. Barghini, M. Battisti +45
Mini-EUSO is a UV telescope that will look downwards to the Earth's atmosphere onboard the International Space Station. With the design of the ultra-high energy cosmic ray fluoresc…
A new sample of X-ray selected Swift/SDSS faint blazars and blazar candidates
Sara Turriziani, Bernardo Fraga, Paolo Giommi
Our present knowledge of the properties of blazars mostly comes from small samples of bright objects, especially regarding studies on their cosmological evolution. Statistically we…
Open Universe for Blazars: a new generation of astronomical products based on 14 years of Swift-XRT data
P. Giommi, C. H. Brandt, U. Barres de Almeida +14
Open Universe for blazars is a set of high-transparency data products for blazar science, and the tools designed to generate them. Blazar astrophysics is becoming increasingly data…
Are many radio-selected BL Lacs radio quasars in disguise?
V. D'Elia, P. Padovani, P. Giommi +1
We show that a blazar classification in BL Lacs and Flat Spectrum Radio Quasars may not be adequate when it relies solely on the equivalent widths (EWs) of optical lines. In fact,…
The innermost regions of relativistic jets and their magnetic fields in radio-loud Active Galactic Nuclei
I. Donnarumma, I. Agudo, L. Costamante +17
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…
A new insight into the innermost jet regions: probing extreme jet variability with LOFT
I. Donnarumma, A. Tramacere, S. Turriziani +4
Blazars are highly variable sources over timescales that can be as low as minutes. This is the case of the High Energy Peaked BL Lac (HBL) objects showing strong variability in X-r…
A simplified view of blazars: why BL Lacertae is actually a quasar in disguise
P. Padovani, P. Giommi, G. Polenta +3
We put forward a scenario where blazars are classified as flat-spectrum radio quasars, BL Lacs, low synchrotron, or high synchrotron peaked objects according to a varying combinati…