| HLX-1 is the best candidate intermediate-mass
black hole among its peers (Farrell et al. 2009). HLX-1 is the brightest
hyperluminous X-ray source with a luminosity reaching 10^42 erg/s at the peak
of its outbursts. It is an enigmatic object that lies 95 Mpc away from us and
is hosted by the galaxy ESO 243-49. The Swift X-ray light curve of the source
shows a Fast Rise Exponential Decay pattern and the spectrum is typically
disk-dominated during the outburst. However, at the lowest X-ray luminosities
the spectrum changes to be hard, that may indicate a jet- or advection
dominated accretion flow. We aimed to study this type of accretion process and
observed HLX-1 with the Australia Telescope Compact Array during this low
X-ray state. We have detected a radio source with a flux density of 22 microJy
(displayed above). The detected emission also suggests (among others) HLX-1 to
be in the intermediate-mass range. Our results are published in
Cseh et al.
(2015).
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