1 citations · 2 across the 7 of their papers we have counts for
29 papers · 1 filter
Energetics - Spectral correlations vs the BATSE Gamma-Ray Bursts population
Z. Bosnjak, A. Celotti, F. Longo +1
Recently proposed correlations between the energetics of Gamma-Ray Bursts (GRB) and their spectral properties, namely the peak energy of their prompt emission, are found to account…
Unveiling Radio Loudness in Quasars
M. Cirasuolo, A. Celotti, M. Magliocchetti +1
We present a new approach to tackle the issue of radio loudness in quasars. We constrain a (simple) prescription for the intrinsic distribution of radio-to-optical ratios by compar…
High Frequency Peakers: Baby Radio Sources?
S. Tinti, D. Dallacasa, G. De Zotti +2
We present the results of second epoch simultaneous multifrequency observations of 45 sources out of the 55 in the sample of High Frequency Peakers (HFP) by Dallacasa et al. (2000)…
Are we observing black hole spins in jetted Gamma-Ray Bursts?
Guido Barbiellini, Annalisa Celotti, Francesco Longo
We note that if the GRB phenomenon follows from the collapse of a massive object forming a black hole and a torus accreting into it, the resulting ejecta can be only related to the…
Hard GRB spectra: thermal vs non-thermal emission
G. Ghirlanda, A. Celotti, G. Ghisellini
We consider the evidence for very hard low energy spectra during the prompt phase of Gamma Ray Bursts (GRB). In particular we examine the spectral evolution of GRB 980306 together…
AGNs among ROSAT Blank Field Sources
I. Cagnoni, M. Elvis, D. -W. Kim +3
We selected a sample of sources with high X-ray over optical flux ratio from the ROSAT PSPC archives. Out of the 16 sources in our sample, one is a (possibly extreme) BL Lac and tw…