Positional coincidences between high-energy neutrino events and the BFFs AT2019aalc and AT2021loi. The blue and red contours represent the 50% and 90%CL containment detailed contours of the high-energy neutrino events IC191119A (left) and IC230511 (right), respectively. The orange box is the 90%CL rectangular containment region. The neutrino best-fit position is shown with a blue point. The optical positions of AT2019aalc (left) and AT2021loi (right) are marked with green star signs.