|Title||TESTING THE CONNECTION BETWEEN THE ULTRALUMINOUS X-RAY SOURCES HOLMBERG IX X-1 A|
|Author||Dr Dominic Walton|
|Description||Multi-epoch broadband spectroscopy of the ultraluminous X-ray source (ULX) NGC1313 X-1 has revealed unusual spectral variability. When fit with accretion disk models, the data show two distinct groups in the L-T plane, each of which exhibits its own positive L-T correlation. Understanding this behaviour is likely key to understanding the structure of super-Eddington accretion flows. Holmberg IX X-1 also shows some evidence for this behaviour, but there is currently only one broadband observation in the high-flux regime, meaning this cannot yet be firmly established. This proposal aims to take a series of 4 XMM+NuSTAR observations (each 25+50ks) of Holmberg IX X-1 in its high-flux state in order to determine whether it does show the same unusual behaviour as NGC1313 X-1.|
|Publication||No observations found associated with the current proposal|
|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, 2021-12-18T00:00:00Z, 087093, 18.02_20200221_1200. https://doi.org/10.5270/esa-[xxxxxxx]|