Landing page for project EC095

AT2019wey was first discovered as an optical transient by the ATLAS survey in December of 2019, and the subsequent detection by the ART-XC and e-ROSITA on board the SRG mission triggered intensive observations on this source in various electromagnetic bands. This source was classified as a Galactic black hole X-ray binary candidate and currently is still bright more than 2 years after its discovery. We observed this source with VLBI in October, November, and December of 2020, and detected a compact jet. Known from the source light curves, the source is now in the hard state, we propose a one-epoch EVN observation at 5 GHz, lasting 3 hours, so that to probe the proper motion of this source, by measuring its phase-referenced position. The proposed observation will provide a more stringent and accurate measurement on the source proper motion and thus the peculiar velocity. The time baseline of longer than 2 years will help to determine if there was a natal kick having occurred when this particular black hole was formed.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197