RSC07
Probing the radio activity of a newly discovered XRB AT2019wey
Recently an optical transient was reported whose optical and X-ray properties are consistent with a BL Lac object in active state. However, there is no radio counterpart in the current large-scale radio surveys, which makes it a newly discovered radio-weak BL Lac (RWBL) candidate. We observed this source with the JVLA and detected a weak radio source at its optical position for the first time. The unresolved feature and the flat or slightly inverted radio spectrum suggest that compact radio emission exists in this source. We propose an exploratory e-EVN observation to directly verify the compact radio core which is critical for classifying a source as a BL Lac. If confirmed, it would be the weakest BL Lac in radio ever known. Considering that this source is undergoing an optical outburst, we plan to carry out multi-epoch VLBI observations to monitor its radio flux density and structural change depending on the outcome of this proposed exploratory observation.
Observation pages at the EVN archive:
Context for this dataThis 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