Fastly varying objects: fast radio bursts, magnetars, and pulsars with RATAN-600

With RATAN-600 radio telescope we can conduct studies of pulsed radiation of events associated with fast radio bursts(FRB), giant pulses (GP) of pulsars and are activity of magnetars at high frequencies. Now the telescope has been equippedwith full-power radiometers with the highest possible time resolution and band division at a frequency of 4.7 GHz into fournarrow channels (150 MHz), which needed for detection of pulse shifts due to cosmic dispersion. As the main aim, thesearch for FRB in the blind 24h-surveys of sky regions has been conducted for more than four years on four radiometers(beams). In the sky regions at declinations of 33, 22, 5 and 11 degrees, no FRB with a ux greater than 5 Jy were detected.However, in the Crab Nebula, we registered seven GP from its 33-millisecond pulsar. The maximum pulse was above 100 Jy.Measurements of radio pulses from the X-ray magnetar XTE J1810−197 were carried out from 19 December 2018, when,after ten years on December 8, 2018 a bright X-ray are occurred and weak radio pulses were detected with a pulsar rotationperiod of 5.54 seconds. Based on the arrival times of pulses in narrow channels, we conrmed the measure of dispersionDM=178 pc/cm 3 . The pulses themselves, with a total duration of about 200 ms, included up to 15 sub-pulses with a widthof 10 to 50 ms with a ux density of up to 5 Jy. During three months XTEJ1809−197 remained the brightest radio pulsarin the Milky Way.