English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Blazar flares have been suggested as ideal candidates for enhanced neutrinoproduction. While the neutrino signal of $\gamma$-ray flares has been widelydiscussed, the neutrino yield of X-ray flares has received less attention.Here, we compute the predicted neutrino signal from X-ray flares detected in 66blazars observed more than 50 times with the X-ray Telescope (XRT) on board theNeil Gehrels Swift Observatory. We consider a scenario where X-ray flares arepowered by synchrotron radiation of relativistic protons, and neutrinos areproduced through photomeson interactions between protons with their ownsynchrotron X-ray photons. Using the 1 keV X-ray light curves for flareidentification, the 0.5-10 keV fluence of each flare as a proxy for theall-flavour neutrino fluence, and the IceCube point-source effective area fordifferent detector configurations, we calculate the number of muon and antimuonneutrinos above 100 TeV expected for IceCube from each flaring source. The bulkof the neutrino events from the sample originates from flares with durations$\sim 1-10$ d. Accounting for the X-ray flare duty cycle of the sources in thesample, which ranges between $\sim2$ and 24 per cent, we compute an averageyearly neutrino rate for each source. The median of the distribution (inlogarithm) is $\sim0.03$ yr$^{-1}$, with Mkn 421 having the highest predictedrate $1.2\pm 0.3$ yr$^{-1}$, followed by 3C 273 $(0.33\pm0.03$ yr$^{-1})$ andPG 1553+113 ($0.25\pm0.02$ yr$^{-1}$). Next-generation neutrino detectorstogether with regular X-ray monitoring of blazars could constrain the dutycycle of hadronic X-ray flares.

High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope