GBT20A-449

The Pulsed Radio Emission of SGR 1935+2154

Abstract

The magnetar SGR 1935+2154 has recently entered a new state of activity (see Atels #13675, 13678, 13682). Surprisingly, this source now seems to not be only active in X-rays, but also for the first time shows activity in radio. CHIME/FRB report on a millisecond-timescale radio burst at 400-800 MHz, likely associated with SGR 1935+2154 (see Atel #13681). They report a DM of 332.8 pc cm-3, which is consistent with estimates from the proposed supernova remnant host, SNR G57.2+0.8. Additionally, STARE2 report on an independent detection of this burst at L-band (see Atel #13684).
We propose to, for the first time, confirm pulsed radio emission from the active magnetar SGR 1935+2154. To confirm the association of the CHIME/FRB burst reported at 400-800 MHz, with SGR 1935+2154, we request to observe the source for one hour using the 800-MHz receiver in full stokes. Moreover, as a detailed rotation measure (RM) map of SNR G57.2+0.8 is known (Kothes et al. 2018), the RM properties of the radio emission of SGR 1935+2154 allow us to confirm the association of SGR 1935+2154 to SNR G57.2+0.8.

Investigators

Name	Institution
Samayra Straal *	Abu Dhabi, New York University
Joseph Gelfand	New York University; National Science Foundation ; Abu Dhabi, New York University
Chryssa Kouveliotou	National Aeronautics and Space Administration

* indicates the PI