Possibly exciting news for multi-messenger astrophysics:
The Swift/GUANO team analyzed data recorded by the BAT instrument onboard the Swift satellite. In a search spatially and temporally coincident with the gravitational wave signal named S241125n that was recorded by LIGO and Virgo on 2024-11-25 01:01:16 they found a weak gamma-ray signal! The GW event has been classified as a merger of two black holes (an electromagnetic signal would thus be rather surprising).
The gamma-ray signal (named EM-S241125n by Astro-COLIBRI) has been localized to about 5 arcminutes. It is shown as a tiny blue spot in the center of the following image (from Swift/GUANO):
Further analyses and observations will tell if this correlation (which can happen by chance once every 12 years) holds…
The announcement by the Swift team can be found here: GCN - Circulars - 38308 - LIGO/Virgo/KAGRA S241125n: Swift/BAT-GUANO candidate counterpart
An additional report by LIGO/Virgo/KAGRA: GCN - Circulars - 38309 - LIGO/Virgo/KAGRA S241125n: Updated Sky localization and Coincidence with External Event