[astroseminar at Sapienza] 27/11/2017 at 15:00: Daniele Fargion

[Elia Battistelli]

Title: Could GRB170817A be really correlated to a NS-NS merging?
Speaker:  Daniele Fargion
Institution: Sapienza Physics Department & INFN Rome1
Date: Monday, 27 November 2017
Time: 3:00pm
Location: Aula Rasetti, Marconi Building, Dept. of Physics, Sapienza 
University

Abstract:
The GW 170817 and GRB170817A occurred within a short time almost in the 
same sky windows.
It has been the nearest Short GRB observed, the first NS NS collapse 
merging, the softer SGRB, the weakest one and the first GRB GW 
correlated event within just a year or even a month of detection. An 
amazing lucky event hard to be accepted at first view.
Moreover the huge spread (8 order of magnitude) in apparent luminosity 
among thousands GRB call for a thin blazing jet source able to embrace 
(with the same NS-NS or NS-BH collapse) the vast variability observed by 
its geometry (in axis , off axis) view. May the case of GRB170817 be 
associated to such an extreme off axis detection?
Many authors and us agree on this possibility.
However there maybe an additional unexpected novel geometry in GRB 
explosion making the GRB observation at near distance much more 
probable: a twin gamma disk-cone blazing in wide solid angles in 
addition to the inner thin precessing jets event.

web: https://agenda.infn.it/conferenceDisplay.py?confId=14519