4 papers · 1 filter
A unifying view of Gamma Ray Burst Afterglows
G. Ghisellini, M. Nardini, G. Ghirlanda +1
We selected a sample of 33 Gamma Ray Bursts (GRBs) detected by Swift, with known redshift and optical extinction at the host frame. For these, we constructed the de-absorbed and K-…
TeV variability in blazars: how fast can it be?
G. Ghisellini, F. Tavecchio, G. Bodo +1
Recent Cerenkov observations of the two BL Lac objects PKS 2155-304 and Mkn 501 revealed TeV flux variability by a factor ~2 in just 3-5 minutes. Even accounting for the effects of…
Precursors in Swift Gamma Ray Bursts with redshift
D. Burlon, G. Ghirlanda, G. Ghisellini +4
We study a sample of Gamma-Ray Bursts detected by the Swift satellite with known redshift which show a precursor in the Swift-BAT light curve. We analyze the spectra of the precurs…
The EMSS Radio Loud Quasar Sample
Anna Wolter, Annalisa Celotti
We construct the first X-ray selected sample of radio-loud quasars from the EMSS survey. The X-ray selection allows us to explore the properties of radio-loud quasars 10-100 weaker…