Iván Furlán — Bartolomé Bavio; Province of Buenos Aires

Official source account — 2021 annual report, printed page 25: Iván Furlán noticed a long luminous trail when reviewing a twenty-second night exposure from Bartolomé Bavio. CIAE found a sinusoidal pattern characteristic of a moving insect captured during a long exposure, sometimes called a rod effect. Low light and exposure duration explained the unusual form. The agency classified the supported photographic explanation Type B rather than claiming a reproducible identification. The summaries distinguish reported observations from the agency’s proposed explanations. Source Type A/B ratings describe explanatory confidence and are not encounter classes.