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Stamatios Ilias Stathopoulos, Maria Petropoulou, Paolo Giommi, Georgios Vasilopoulos, Paolo Padovani, Apostolos Mastichiadis
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), Volume 395; doi:10.22323/1.395.1008

Abstract:
Blazars are the most extreme subclass of active galactic nuclei with relativistic jets emerging from a supermassive black hole and forming a small angle with respect to our line of sight. Blazars are also known to be related to flaring activity as they exhibit large flux variations over a wide range of frequency and on multiple timescales, ranging from a few minutes to several months. The detection of a high-energy neutrino from the flaring blazar TXS 0506+056 and the subsequent discovery of a neutrino excess from the same direction have naturally strengthened the hypothesis that blazars are cosmic neutrino sources. While neutrino production during gamma-ray flares has been widely discussed, the neutrino yield of X-ray flares has received less attention. Motivated by a theoretical scenario where high energy neutrinos are produced by energetic protons interacting with their own x-ray synchrotron radiation, we make neutrino predictions over a sample of X-ray blazars. This sample consists of all blazars observed with the X-ray Telescope (XRT) on board Swift more than 50 times from November 2004 to November 2020. The statistical identification of a flaring state is done using the Bayesian Block algorithm to the 1 keV XRT light curves of frequently observed blazars. We categorize flaring states into classes based on their variation from the time-average value of the data points. During each flaring state, we compute the expected muon plus anti-muon neutrino events as well as the total signal for each source using the point-source effective area of Icecube for different operational seasons. We find that the median of the total neutrino number (in logarithm) from flares with duration < 30 d is 0.02 events
Manuela Moreira DA Silva, Luís Cristovão, Duarte Marinho, Eduardo Esteves, Gil Fraqueza, António Martins
Published: 28 July 2021
Water and Society VI; doi:10.2495/ws210091

Kevin Thieme
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), Volume 395; doi:10.22323/1.395.0548

Abstract:
Benefiting from more than a decade of experience in WIMP searches with dual-phase xenon time projection chambers, the DARWIN (DARk matter WImp search with liquid xenoN) collaboration intends to build a next-generation detector involving 50 tonnes (40 tonnes active) of xenon. The primary goal of the observatory is to explore the entire experimentally accessible parameter space for WIMP masses above 5 GeV/c$^{2}$ down to the irreducible neutrino floor. With its low energy threshold and ultra-low background level, DARWIN will be an excellent platform to search for various other rare interactions. These include the neutrinoless double beta decay of $^{136}$Xe, a high-precision measurement of the low-energy solar neutrino flux, as well as searches for solar axions and axion-like-particles. We present the detector concept, the sensitivity to the various science channels, and ongoing R&D efforts.
Mohammed F. M. Abushammala, Wajeeha A. Qazi, Mohammed Fahad Abdul Latif
Published: 28 July 2021
Water and Society VI; doi:10.2495/ws210041

Bethy Merchan, Paula Ullauri, Fernando Amaya, Lenin Dender, Paul Carrión,
Published: 28 July 2021
Water and Society VI; doi:10.2495/ws210081

Quiriatjaryn M. Ortega-Samaniego, Inmaculada Romero, María Paches, Arturo Dominici, Andres Fraíz
Published: 28 July 2021
Water and Society VI; doi:10.2495/ws210101

Guadalupe Ortiz, Pablo Aznar-Crespo, Ángela Olcina-Sala
Published: 28 July 2021
Water and Society VI; doi:10.2495/ws210071

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