ИСТИНА

Relativistic electron microbursts (REMs) are the intensive increasing of energetic electron (MeV energy range) precipitation from magnetosphere in a subsecond time scale. These microbursts were measured for example by the SAMPEX mission. It was shown that REMs are mostly related to the outer radiation belt and occur predominantly on the dawn-side, between 0 and 13 MLT. On the other and it was show that REMs can be a high-energy part of pulsating aurora electrons which precipitate deeper in the atmosphere (down to 65 km). Recently, a strong correlation between REMs and Patchy Aurora was demonstrated. In this regard, of particular interest is the search for short bursts of atmospheric emission in the near UV range, which may be a consequence of the such relativistic electrons beams impact. In the autumn of 2021, a multichannel imaging photometer of PAIPS (Pulsating Aurora Imaging Photometers System) project based on the multi-anode photomultipliers (MAPMT) was installed at the Verkhnetulomsky Observatory. This equipment is based on the technology developed for the ultra-high-energy cosmic rays fluorescent atmospheric emission measurements. Thus, it measures atmospheric emission in a near-UV (300–400 nm) wavelength band in a single photoelectron mode. Oscillograms with a three different temporal resolutions were recorded: 2.5 μs, 320 μs and 40 ms. Measurements were conducted in continuous monitoring mode during 163 night in 2021/2022 season Parameters of the equipment make it possible to detect short bursts of radiation in the aurora region. Results of data processing and a search for such microbursts will be presented. The work was supported by the Russian Science Foundation grant no. 22-62-00010 (https://rscf.ru/project/22-62-00010/).