43 citations · 46 across the 2 of their papers we have counts for
12 papers · 1 filter
X-ray spectral evolution of TeV BL Lac objects: eleven years of observations with BeppoSAX, XMM-Newton and SWIFT satellites
F. Massaro, A. Tramacere, A. Cavaliere +2
Many of the extragalactic sources detected in rays at TeV energies are BL Lac objects. In particular, they belong to the subclass of ``high frequency peaked BL Lacs" (HBLs), as…
A MST algorithm for source detection in gamma-ray images
Riccardo Campana, Enrico Massaro, Dario Gasparrini +2
We developed a source detection algorithm based on the Minimal Spanning Tree (MST), that is a graph-theoretical method useful for finding clusters in a given set of points. This al…
The 26 year-long X-ray light curve and the X-ray spectrum of the BL Lac Object 1E 1207.9+3945 in its brightest state
A. Maselli, P. Giommi, M. Perri +4
We studied the temporal and spectral evolution of the synchrotron emission from the high energy peaked BL Lac object 1E 1207.9+3945. Two recent observations have been performed by…
Functional biases in GRB's spectral parameter correlations
F. Massaro, S. Cutini, M. L. Conciatore +1
Gamma Ray Bursts (GRBs) show evidence of different spectral shapes, light curves, duration, host galaxies and they explode within a wide redshift range. However, the most of them s…
Swift detection of all previously undetected blazars in a micro-wave flux-limited sample of WMAP foreground sources
P. Giommi, M. Capalbi, E. Cavazzuti +19
Almost the totality of the bright foreground sources in the WMAP CMB maps are blazars, a class of sources that show usually also X-ray emission. However, 23 objects in a flux-limit…
Spectral modelling of the high energy emission of the magnetar 4U 0142+614
Nanda Rea, Roberto Turolla, Silvia Zane +4
We present an empirical spectral modelling of the high energy emission of the anomalous X-ray pulsar 4U 0142+614, based on simultaneous Swift and INTEGRAL observations from X to ga…