DOI

https://handle.test.datacite.org/10.82017/j9gb-ez17

Project

RM015

Title

e-EVN: rm015, ry007a, ey031, rsg11

Abstract

A slowly-evolving extragalactic radio transient, J1419+3940, has been reported during these weeks. This source :s consistent with a fading orphan long gamma-ray burst or with a young magnetar which is powering a nebula. Interestingly, the properties of J1419+3940 are surprisingly similar to the ones observed in the only repeating Fast Radio Burst discovered to date, FRB 121102. Indeed, J1419+3940 is coincident with a star-forming region in a dwarf galaxy, and its radio luminosity is equivalent to the one observed in FRB 121102. We thus conclude that J1419+3940 can be a potential source of FRBs (and even the second known repeating FRB). We propose to study J1419+3940 with the EVN to determine its compactness (to see if its consistent with the one observed in FRB 121102, and also to distinguish between GRB models) before the source becomes too faint. Given that the conditions observed in J1419+3940 and FRB 121102 are intriguing similar, one could expect to observe FRBs also from this source. Searches of bursts in the single-dish data during these observations will be performed, and in case of detection we would be able to discover and localize the second FRB to date, as performed with FRB 121102.