Neutrino Target of Opportunity program for the Cherenkov Telescope Array

Publication type:
Conference
Metadata:
Autoren
  • Konstancja Satalecka
  • Anthony Brown
  • Alberto Rosales de Leon
  • Olga Sergijenko
  • Chun Fai Tung
  • René Reimann
  • Theo Glauch
  • Igancio Taboada
DOI
10.22323/1.358.0784
Zeitschrift
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)
Name of conference
36th International Cosmic Ray Conference
Datum der Veröffentlichung
2019
Status
Published
Herausgeber
Sissa Medialab
Herausgeber URL
http://dx.doi.org/10.22323/1.358.0784
Datum der Datenerfassung
2021
Conference start date
2019
Titel
Neutrino Target of Opportunity program of the Cherenkov Telescope Array

Data source: Crossref

Other metadata sources:
Abstract
The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. This may point to a large population of faint, steady sources or flaring objects as origins of this flux. The most compelling evidence for a neutrino point source so far is the recent observation of the flaring gamma-ray blazar TXS 0506+056 in coincidence with a high-energy neutrino from IceCube. This is a result of a Neutrino Target of Opportunity (NToO) program in which all currently operating Imaging Atmospheric Cherenkov Telescopes (IACTs) take part. The case for TXS 0506+056 being a neutrino source was made stronger by evidence of a 5-month long neutrino flare in 2014-2015. Here we investigate the chances of a detection of a gamma-ray counterpart to a neutrino source with CTA, as a result of a follow-up observation of a neutrino alert. We use the FIRESONG software to simulate different neutrino sources populations, which could be responsible for the diffuse flux of astrophysical neutrinos as measured by IceCube. We scan over parameters that can be used to describe the populations such as density (density rate) for steady (flaring) objects. Several CTA array layouts and instrument response functions are tested in order to derive optimal follow-up strategies and the potential science reach of the NToO program for CTA. We find that following neutrino alerts by IceCube, CTA has a low per alert probability of detecting a matching steady source. However, using a model by Halzen et al. (2018), for neutrino flares similar to that of 2014-2015, we find that CTA will detect a counterpart in as many as one third of the alerts.
Autoren
  • Konstancja Satalecka
  • Anthony M Brown
  • Alberto Rosales de Leon
  • Olga Sergijenko
  • Chun Fa Tung
  • René Reimann
  • Theo Glauch
  • Igancio Taboada
Zeitschrift
https://pos.sissa.it/358/
Conference place
Madison, WI, U.S.A.
Name of conference
36th International Cosmic Ray Conference (ICRC2019)
Paginierung
784 - 784
Ort der Veröffentlichung
https://pos.sissa.it/358/784/
Publisher licence
CC BY-NC-ND
Datum der Datenerfassung
2020
Titel
Neutrino Target of Opportunity program for the Cherenkov Telescope Array
Ausgabe der Zeitschrift
358

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