1k citations · 4.9k across the 91 of their papers we have counts for
5 papers · 2 filters
The puzzling clustering and bimodality of long GRBs optical afterglow luminosities
M. Nardini, G. Ghisellini, G. Ghirlanda
The study of the rest frame properties of long Gamma-Ray bursts (GRBs) afterglows is a fundamental aspect for a better understanding of the nature of these powerful explosions. The…
The changing look of PKS 2149-306
V. Bianchin, L. Foschini, G. Ghisellini +8
Aims: We study the blazar nature of the high-redshift Flat-Spectrum Radio Quasar PKS 2149-306 (z = 2.345) by investigating its long-term behavior. Methods: We analyzed all publicly…
Selection effects on GRB spectral-energy correlations
Lara Nava, Giancarlo Ghirlanda, Gabriele Ghisellini
Instrumental selection effects can act upon the estimates of the peak energy Ep, the fluence F and the peak flux P of GRBs. If this were the case, then the correlations involving t…
Short versus Long Gamma-Ray Bursts: spectra, energetics, and luminosities
G. Ghirlanda, L. Nava, G. Ghisellini +2
We compare the spectral properties of 79 short and 79 long Gamma-Ray Bursts (GRBs) detected by BATSE and selected with the same limiting peak flux. Short GRBs have a low-energy spe…
Blazar nuclei in radio-loud narrow-line Seyfert 1?
L. Foschini, L. Maraschi, F. Tavecchio +3
It has been suggested that some radio-loud narrow-line Seyfert 1 contain relativistic jets, on the basis of their flat-spectrum radio nuclei and studies on variability. We present…