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737 papers · 1 filter
An X-ray and Multiwavelength Survey of Highly Radio-Loud Quasars at z > 4: Jet-Linked Emission in the Brightest Radio Beacons of the Early Universe
Jianfeng Wu, W. N. Brandt, Brendan P. Miller +3
(Abridged) We present a systematic study of the X-ray and multiwavelength properties of a sample of 17 highly radio-loud quasars (HRLQs) at z > 4 with sensitive X-ray coverage from…
A new flaring high energy gamma-ray source
E. Bernieri, R. Campana, E. Massaro +2
We report the detection of a new gamma-ray source in the Fermi-LAT sky using a source detection tool based on the Minimal Spanning Tree algorithm. The source, not reported in previ…
Surface Density of dark matter haloes on galactic and cluster scales
A. Del Popolo, V. Cardone, G. Belvedere
In this paper, in the framework of the secondary infall model, the correlation between the central surface density and the halo core radius of galaxy, and cluster of galaxies, dark…
PSR J0357+3205: the tail of the turtle
Martino Marelli, Andrea De Luca, David Salvetti +6
Using a new XMM-Newton observation, we have characterized the X-ray properties of the middle-aged radio-quiet gamma-ray pulsar J0357+3205 (named Morla) and its tail. The X-ray emis…
Spectroscopic atlas of Halpha and Hbeta in a sample of northern Be stars
G. Catanzaro
We present Balmer lines spectroscopy for a sample of 48 Be stars. For most of them, H and H have been observed more than two times, in a total period spanning almost two year…
PSR J0357+3205: a fast moving pulsar with a very unusual X-ray trail
A. De Luca, R. P. Mignani, M. Marelli +6
The middle-aged PSR J0357+3205 is a nearby, radio-quiet, bright gamma-ray pulsar discovered by the Fermi mission. Our previous Chandra observation revealed a huge, very peculiar st…