The FRB 121102 signal maintained its periodicity of 157 days.
FRB (fast-radio burst) is a signal that lasts in the order of microseconds to milliseconds and thanks to this “feature” it is difficult to determine the source of the transmission, so far they have managed to locate eight. The FRB was first observed in 2007, so it is a completely new and sufficiently unexplored phenomenon in radio astronomy. What causes them is not yet clear. Conjectures about their origin include hypotheses of sources from neutron stars, black holes, magnetars to extraterrestrial civilizations. Their other feature is the high energy that the radiated signal achieves, the order of magnitude of the energy equivalents of what the Sun radiates in 100 years in one flash. The signal is already significantly weakened, up to a thousand times weaker than what your mobile phone emits.
The first signs of the signal were captured as early as 2012, but it is still not known exactly where it came from. Researchers led by Marilyn Cruces of the Max Planck Institute for Radio Astronomy accurately predicted its periodicity, which is 67 days of “silence” and 90 days of rapid flashes in milliseconds.
The FRB signal is also being monitored by a scientific team from the Chinese National Astronomical Observatory, led by Pei Wang, who are monitoring the signal with a five-meter radio telescope from March to August. However, the Chinese team set a different recurrence period for FRB 121102 at 156.1 days.
Image source: Wikipedia
From March to June, no flashes of this signal were detected, but the turning point did not occur until August 17, and so far twelve of them have been detected, indicating that the source is active again. The location of these rapidly repeating signals has been preliminarily determined by a dwarf galaxy 3 billion light-years away. As the signal repeats in millisecond flashes, the problem is to determine its exact position and scientists will continue to monitor it. Another interesting feature of the signal is its strength. It has the energy of millions of suns radiated in one flash.
Image source: EarthSky
Source: Technológie by pc.zoznam.sk.
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