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Non-detection of M60-UCD1 in Quasi-simultaneous X-Ray and Radio Observations

Jonker, Peter G.; Lena, Davide; Miller-Jones, James C. A. +1 more

Simultaneous detection in X-rays and radio, following the proportionality implied by the "fundamental plane of black hole activity," can indicate the presence of an accreting black hole (BH), allowing a rough estimate of its mass. We used the XMM-Newton satellite and the Karl G. Jansky Very Large Array to perform quasi-simultaneous observations (w…