Monitoring the Size and Flux Density of Sgr A* during the Active State in 2019 with East Asian VLBI Network
Monitoring the Size and Flux Density of Sgr A* during the Active State in 2019 with East Asian VLBI Network
In this work, we studied the Galactic Center supermassive black hole (SMBH), Sagittarius A* (Sgr A*), with the KVN and VERA Array (KaVA)/East Asian VLBI Network (EAVN) monitoring observations. Especially on 13 May 2019, Sgr A* experienced an unprecedented bright near infra-red (NIR) flare; so, we find a possible counterpart …