The Crab nebula (one of the “standard candles” in gamma-ray astronomy) is showing some renewed flaring activity in the GeV gamma-ray band. The flux is currently almost twice as high as usual. This flare was picked up by the automatic FLaapLUC analysis of data recorded by the LAT instrument onboard the Fermi satellite. The source is called 4FGL J0534.5+2201i in the 4th Fermi-LAT catalog.
Details here: Astro-COLIBRI