|Title||Confirming spectral state transitions in ESO 243-49 HLX-1|
|Author||Dr Sean Farrell|
|Description||Swift monitoring of the intermediate mass black hole candidate ESO 243-49 HLX-1 found that in August 2009 it dropped in flux by an order of magnitude in conjunction with a possible spectral hardening. The limited throughput of the Swift XRT prevents us from confirming that HLX-1 undergoes transitions between the same canonical spectral states as Galactic black hole binaries. Having performed XMM observations in the high-soft state, we wish to obtain a high quality X-ray spectrum in the low state to confirm the hardening suggested by the XRT. This is the missing piece before conclusions can be drawn from the comparison of its spectral properties with those of Galactic black hole systems.|
|Publication||X-Ray Variability and Hardness of ESO 243-49 HLX-1: Clear Evidence for Spectral State Transitions . Servillat, Mathieu, Farrell, Sean A., et all. . ApJ . 743-6 . 2011 . 2011ApJ...743....6S ,
Exploring the nature of the brightest hyper-luminous X-ray source . Farrell, S. A., Servillat, M., et all. . AN . 332-392 . 2011 . 2011AN....332..392F ,
Investigating Slim Disk Solutions for HLX-1 in ESO 243-49 . Godet, O., Plazolles, B., et all. . ApJ . 752-34 . 2012 . 2012ApJ...752...34G ,
H I study of the environment around ESO 243-49, the host galaxy of an intermediate-mass black hole . Musaeva, A., Koribalski, B. S., et all. . MNRAS . 447-1951 . 2015 . 2015MNRAS.447.1951M ,
The Origin of Variability of the Intermediate-mass Black-hole ULX System HLX-1 in ESO 243-49 . Lasota, J.-P., Alexander, T., et all. . ApJ . 735-89 . 2011 . 2011ApJ...735...89L ,
Radio variability in the Phoenix Deep Survey at 1.4 GHz . Hancock, P. J., Drury, J. A., et all. . MNRAS . 461-3314 . 2016 . 2016MNRAS.461.3314H ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
New Physical Insights about Tidal Disruption Events from a Comprehensive Observational Inventory at X-Ray Wavelengths . Auchettl, Katie, Guillochon, James, . ApJ . 838-149 . 2017 . 2017ApJ...838..149A ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2011-06-09T00:00:00Z, 065551, 17.56_20190403_1200. https://doi.org/10.5270/esa-v7t4d1w|