Detection of radio emission from SGR 1935+2154 at the frequency 111 MHz
ATel #14186; Rodin Alexander (PRAO ASC LPI), Viktoriya Fedorova (PRAO ASC LPI)
on 17 Nov 2020; 16:16 UT
Credential Certification: Alexander Rodin (rodin@prao.ru)
Subjects: Radio, Soft Gamma-ray Repeater, Transient, Pulsar, Fast Radio Burst, Magnetar
We report the detection of a single pulse from the galactic magnetar SGR 1935 + 2154 found in the archived data of the BSA LPI radio telescope. The search for single pulses in the radio range from SGR 1935 + 2154 was carried out daily in 5-minute scans from 2020-01-01 to2020-11-16 inclusive. In total about twenty six hours of observations were analyzed. The flash was registered at a frequency of 111 MHz in a 2.5 MHz observation band with a temporal resolution of 0.1 s 2020-09-02 UTC 18:14:59. The following characteristics were determined upon signal detection: DM = 320 pc/cm^3 +/- 10 pc/cm^3, S/N = 6.6, flux density 140 mJy, pulse width 2.2 sec, scattering of pulse ~340 ms which corresponds to fluence ~ 300 mJy ms. The arrival time of the pulse allows us to conclude that the signal fell into the side lobe of the BSA LPI beam. Therefore this estimate is the lower limit of the flux density. Dynamic spectrum and total pulse profile are shown at the link below.
SGR 1935+2154 at 111 MHz
