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High-energy astrophysical neutrinos detected by IceCube originate from:
- Blazars
- Supernova remnants
- Gamma-ray bursts
- All of these
Answer: All of these
Neutrinos travel unimpeded from cosmic accelerators, pointing to sources of ultra-high-energy cosmic rays. IceCube's detection of TXS 0506+056 blazar (2018) marked birth of neutrino astronomy. INO will contribute to multi-messenger studies. [[IUCAA Reports]]