# Combined analysis of Hubble and VLT photometry of the intermediate mass black hole ESO 243−49 HLX-1

@article{Farrell2014CombinedAO,
title={Combined analysis of Hubble and VLT photometry of the intermediate mass black hole ESO 243−49 HLX-1},
author={S. Farrell and Mathieu Servillat and Jeanette Claire Gladstone and Natalie Webb and Roberto Soria and Thomas J. Maccarone and Klaas Wiersema and George K. T. Hau and J Pforr and Pasi J. Hakala and Christian Knigge and Didier Barret and Claudia Maraston and Albert K. H. Kong},
journal={Monthly Notices of the Royal Astronomical Society},
year={2014},
volume={437},
pages={1208-1215}
}
• Published 9 October 2013
• Physics
• Monthly Notices of the Royal Astronomical Society
In this paper, we present a combined analysis of data obtained with theHubbleSpaceTelescope (HST), Very Large Telescope (VLT) and Swift X-ray telescope of the intermediate-mass black hole ESO 243−49 HLX-1 that were taken two months apart between 2010 September and November. Previous separate analyses of these data found that they were consistent with an irradiated accretion disc with contribution from either a very young or very old stellar population, and also indicated that the optical flux…
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## References

SHOWING 1-10 OF 40 REFERENCES

### A YOUNG MASSIVE STELLAR POPULATION AROUND THE INTERMEDIATE-MASS BLACK HOLE ESO 243-49 HLX-1

• Physics
• 2012
We present Hubble Space Telescope and simultaneous Swift X-ray Telescope observations of the strongest candidate intermediate-mass black hole (IMBH) ESO 243-49 HLX-1. Fitting the spectral energy

### INVESTIGATING SLIM DISK SOLUTIONS FOR HLX-1 IN ESO 243-49

• Physics
• 2012
The hyperluminous X-ray source HLX-1 in the galaxy ESO 243-49, currently the best intermediate-mass black hole (BH) candidate, displays spectral transitions similar to those observed in Galactic BH

### Optical counterpart of HLX‐1 during the 2010 outburst

• Physics
• 2011
We studied the optical counterpart of the intermediate-mass black hole candidate HLX-1 in ESO 243−49. We used a set of Very Large Telescope imaging observations from 2010 November, integrated by

### KINEMATICS OF THE INTERMEDIATE-MASS BLACK HOLE CANDIDATE HLX-1

• Physics
• 2013
We studied the optical spectrum of HLX-1 during its latest outburst, using the FORS2 spectrograph on the Very Large Telescope. We detect an Hα emission line centered at λ = 6718.9 ± 0.9 Å and find

### THE ORIGIN OF VARIABILITY OF THE INTERMEDIATE-MASS BLACK-HOLE ULX SYSTEM HLX-1 IN ESO 243-49

• Physics
• 2011
The ultra-luminous (LX ≲ 1042 erg s−1) intermediate-mass black-hole (IMBH) system HLX-1 in the ESO 243-49 galaxy exhibits variability with a possible recurrence time of a few hundred days. Finding

### Discovery of an optical counterpart to the hyperluminous X-ray source in ESO 243-49

• Physics
• 2010
The existence of black holes of masses � 10 2 -10 5 Mhas important implications for the formation and evolution of star clusters and supermassive black holes. One of the strongest candidates to date

### A REDSHIFT FOR THE INTERMEDIATE-MASS BLACK HOLE CANDIDATE HLX-1: CONFIRMATION OF ITS ASSOCIATION WITH THE GALAXY ESO 243-49

• Physics
• 2010
In this Letter, we report a spectroscopic confirmation of the association of HLX-1, the brightest ultra-luminous X-ray (ULX) source, with the galaxy ESO 243-49. At the host galaxy distance of 95 Mpc,

### CHANDRA AND SWIFT FOLLOW-UP OBSERVATIONS OF THE INTERMEDIATE-MASS BLACK HOLE IN ESO 243-49

• Physics
• 2010
The brightest ultra-luminous X-ray source HLX-1 in the galaxy ESO 243-49 provides strong evidence for the existence of intermediate-mass black holes (IMBHs). As the luminosity and thus the mass

### X-RAY VARIABILITY AND HARDNESS OF ESO 243–49 HLX-1: CLEAR EVIDENCE FOR SPECTRAL STATE TRANSITIONS

• Physics
• 2011
The ultraluminous X-ray (ULX) source ESO 243–49 HLX-1, which reaches a maximum luminosity of 1042 erg s−1 (0.2–10 keV), currently provides the strongest evidence for the existence of

### Reprocessing of X-rays in the outer accretion disc of the black hole binary XTE J1817-330

• Physics
• 2008
We build a simple model of the optical/ultraviolet (UV) emission from irradiation of the outer disc by the inner disc and coronal emission in black hole binaries. We apply this to the broad-band