Further Observations of the Intermediate Mass Black Hole Candidate ESO 243-49 HLX-1

TL;DR

This study provides multi-wavelength observations of HLX-1, refining its position and analyzing its emission across X-ray, UV, and radio bands to support its classification as an intermediate mass black hole candidate.

Contribution

The paper offers updated precise localization and multi-wavelength data of HLX-1, enhancing understanding of its nature and environment.

Findings

Refined X-ray position to sub-arcsecond accuracy.

Detected UV emission suggesting possible star formation.

No detectable radio emission at the source position.

Abstract

The brightest Ultra-Luminous X-ray source HLX-1 in the galaxy ESO 243-49 currently provides strong evidence for the existence of intermediate mass black holes. Here we present the latest multi-wavelength results on this intriguing source in X-ray, UV and radio bands. We have refined the X-ray position to sub-arcsecond accuracy. We also report the detection of UV emission that could indicate ongoing star formation in the region around HLX-1. The lack of detectable radio emission at the X-ray position strengthens the argument against a background AGN.