[Okc-wp4] EO meeting: 21st of October

[Davide Gizzi]

Dear all,

a kind reminder of the EO meeting today at 13:15.


Kind Regards

Ana Sagués Carracedo & Davide Gizzi
________________________________
From: Davide Gizzi
Sent: Thursday, October 14, 2021 8:54:02 AM
To: Okc-wp4 at fysik.su.se; people at nordita.org
Cc: Kunal Deoskar
Subject: EO meeting: 21st of October

Dear colleagues,

our next EO meeting will take place next Thursday, 21st of October, at 13:15 via Zoom.
To join access: https://stockholmuniversity.zoom.us/j/67378581617

The speaker is Kunal Deoskar, Ph.D. student in the Elementary Particle Physics division at the Stockholm University and member of the IceCube Neutrino Observatory. He will be talking about his research, which focuses on searching for sources of high energy astrophysical neutrinos, particularly Gamma-ray Bursts as potential candidates.

Find below title and abstract of the talk.

Title:
Search for Neutrinos from Precursors and Afterglows of Gamma-ray Bursts using the IceCube Neutrino Observatory.

Abstract:
Gamma ray bursts (GRBs) have long been considered as a possible source of ultra high energy cosmic rays, which makes them a promising neutrino source candidate. Previous IceCube searches for neutrino connections with GRBs focused on the prompt phase of the GRB and found no significant correlation between neutrino events and the observed GRBs. This motivates us to extend our search beyond the prompt phase. A model independent search using an unbinned maximum likelihood method is performed to search for muon neutrino correlations with the precursor and afterglow phases of gamma ray bursts and the results are presented. The analysis is applied to a selection of 733 GRBs searching for neutrino detections concurrent with GRB observations separately for the precursor and for the prompt+afterglow emission regions. We obtain the best-fit results for individual GRBs and the final significance for each search is evaluated using binomial tests. Neither of the two searches provides significant evidence of neutrino emission from GRBs during an extended time period up to two weeks before or after the prompt phase of gamma-ray emission. The results are used to establish population limits to determine the contribution of cosmic GRBs to the observed diffuse neutrino flux.


Hope to see you there!

Ana Sagués Carracedo & Davide Gizzi




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