The analysis of 10 years of IceCube data (IC40, IC59, IC79, IC86-1, ICII-ICVII) has recently been unblinded, unifying the muon diffuse and point source streams, and presented this week at the XVIII International Workshop on Neutrino Telescopes (Neutel 2019). The results are consistent with background, both for the Northern and Southern hemispheres. A list of 110 targets, motivated by gamma-ray observations, was also unblinded. The hottest source was found to be M77 (RA 40.667°, Dec -0.0069°) some 0.3° away from the all-sky hot spot, with a significance of 2.9σ (post-trial). At a distance of 14 Mpc, M77, also known as NGC 1068, is one of the closest Seyfert galaxies with a supermassive black hole in its core with misaligned jet.
Using data taken between 2007 and 2017, ANTARES has searched for high energy neutrinos in the direction of M77. The results, shown in the figure below, are consistent with background, yielding an upper limit on a possible E-2 neutrino spectrum of 8.7×10-9 GeV/cm2/s, with similar values for indices between 1.6 and 2.7.
