Image Details
Caption: Figure 4.
Expected (star), best-fit (dot), and 90% confidence level upper limit (triangle) number of signal neutrinos assuming disk–corona model spectra, with the three most significant sources—Circinus galaxy (red), NGC 7582 (pink), and ESO 138-1 (blue)—highlighted. Sources from left to right have a decreasing number of expected signal neutrinos. The ambiguous origin of the X-ray emission from Centaurus A introduces large uncertainties in the expected neutrino flux; therefore, we include it in the individual source search but not in the weighted stacking analysis.
© 2026. The Author(s). Published by the American Astronomical Society.