Lecturer: Dr. Reetanjali Moharana Affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem Abstract: IceCube is the world’s largest detector for cosmic neutrinos, built in South Pole. Recently reported 54 high-energy starting events (HESE) by IceCube is one of the main attractions for astrophysics as well as particle physics. This sample collected within 1347 days of operation, have deposited energy ranging from 20 TeV to 2 PeV. These events correspond to a 6.5σ detection of cosmic neutrinos above an estimated ~9.0 atmospheric neutrino background events and 12.6 ± 5.1 atmospheric muon background events. The origin of these cosmic neutrinos is one of the outstanding puzzles in recent years. An astrophysical origin can be established by a significant correlation of the HESE neutrino with different counterpart directions. Ultra-high energy cosmic rays, high energy gamma rays are one of the important counterparts for astrophysical neutrinos. We have studied the angular cross correlation between the HESE events with UHECRs and different source catalogs of high energy γ-rays detected by Fermi. Additional details of the upcoming Astrophysics' seminars can be found on the following link. ‏האירוע הזה כולל שיחת וידאו ב-Google Hangouts. הצטרף: https://plus.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.it7ilqreovpevecssd4b1g18jo&hs=121