Preprint

PUBDB-2024-06559

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fermi-LAT follow-up observations in seven years of real-time high-energy neutrino alerts

Garrappa, S. (Corresponding author) ; Buson, S. ; Sinapius, J.DESY* ; Franckowiak, A.Extern* ; Liodakis, I. ; Bartolini, C. ; Giroletti, M. ; Nanci, C. ; Principe, G. ; Venters, T. M.

2024

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Report No.: arXiv:2401.06666

Abstract: The realtime program for high-energy neutrino track events detected by the IceCube South Pole Neutrino Observatory releases alerts to the astronomical community with the goal of identifying electromagnetic counterparts to astrophysical neutrinos. Gamma-ray observations from the Fermi-Large Area Telescope (LAT) enabled the identification of the flaring gamma-ray blazar TXS 0506+056 as a likely counterpart to the neutrino event IC-170922A. By continuously monitoring the gamma-ray sky, Fermi-LAT plays a key role in the identification of candidate counterparts to realtime neutrino alerts. In this paper, we present the Fermi-LAT strategy for following up high-energy neutrino alerts applied to seven years of IceCube data. Right after receiving an alert, a search is performed in order to identify gamma-ray activity from known and newly detected sources that are positionally consistent with the neutrino localization. In this work, we study the population of blazars found in coincidence with high-energy neutrinos and compare them to the full population of gamma-ray blazars detected by Fermi-LAT. We also evaluate the relationship between the neutrino and gamma-ray luminosities, finding different trends between the two blazar classes BL Lacs and flat-spectrum radio quasars.Key words: astroparticle physics / neutrinos / galaxies: active / gamma rays: galaxies

Keyword(s): gamma ray ; blazar ; IceCube ; observatory ; monitoring ; localization ; quasar ; tracks ; pole ; electromagnetic

Note: A&A 687, A59 (2024). Published on A&A

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Contributing Institute(s):

1. Gammaastronomie (Z_GA)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)
2. DFG project G:(GEPRIS)445052434 - SFB 1491: Das Wechselspiel der kosmischen Materie - von der Quelle bis zum Signal (445052434) (445052434)
3. MessMapp - Mapping Highly-Energetic Messengers throughout the Universe (949555) (949555)

Experiment(s):

1. The Fermi Large Area Telescope

Appears in the scientific report 2024

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Database coverage:
Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Garrappa, S. (Corresponding author) ; Buson, S. ; Sinapius, J.DESY* ; Franckowiak, A. ; Liodakis, I. ; Bartolini, C. ; Giroletti, M. ; Nanci, C. ; Principe, G. ; Venters, T. M.
$Fermi$-LAT follow-up observations in seven years of realtime high-energy neutrino alerts
Astronomy and astrophysics 687, A59 (2024) [10.1051/0004-6361/202449221]2024     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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