| Proposal ID | 087093 |
| Title | TESTING THE CONNECTION BETWEEN THE ULTRALUMINOUS X-RAY SOURCES HOLMBERG IX X-1 A |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930101 |
| DOI | https://doi.org/10.57780/esa-7gz9cju |
| Principal Investigator, PI | Dr Dominic Walton |
| Abstract | Multi-epoch broadband spectroscopy of the ultraluminous X-ray source (ULX)NGC1313 X-1 has revealed unusual spectral variability. When fit with accretiondisk models, the data show two distinct groups in the L-T plane, each of whichexhibits its own positive L-T correlation. Understanding this behaviour islikely key to understanding the structure of super-Eddington accretion flows. Holmberg IX X-1 also shows some evidence for this behaviour, but there iscurrently only one broadband observation in the high-flux regime, meaning thiscannot yet be firmly established. This proposal aims to take a series of 4XMM+NuSTAR observations (each 25+50ks) of Holmberg IX X-1 in its high-flux statein order to determine whether it does show the same unusual behaviour as NGC1313 X-1. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-10-17T09:28:08Z/2020-11-24T15:45:05Z |
| Version | 18.02_20200221_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2021-12-18T00:00:00Z |
| Keywords | "NuSTAR", "ngc1313 x", "accretion disk models", "XMM", "firmly established", "flux regime", "spectral variability", "holmberg ix x", "own positive", "NGC1313" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Dominic Walton, 2021, 'TESTING THE CONNECTION BETWEEN THE ULTRALUMINOUS X-RAY SOURCES HOLMBERG IX X-1 A', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-7gz9cju |