In early April, AGN 3C 345 showed increased activity in the gamma range of the electromagnetic spectrum. This was detected by both the Fermi LAT, the Large Area Telescope on the Fermi satellite, and the AGILE satellite. The Swift research satellite was then able to measure an additional increase in X-rays from this object in the following days.
AGN 3C 345, a quasar, has been part of our schedule at the Hans-Haffner-Observatory for several years.

For this reason, we were especially attentive over the next few nights and were actually able to measure an increase in the brightness of this AGN by over one magnitude in the period from 17 to 20 April, the first in the world to do so, and to publish our now tenth Astronomers Telegram.