A dataset provided by the European Space Agency

Name 087093
Title TESTING THE CONNECTION BETWEEN THE ULTRALUMINOUS X-RAY SOURCES HOLMBERG IX X-1 A
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930401
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930501
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930601
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930701
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930801
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870930901
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0870931001

DOI https://doi.org/10.5270/esa-[xxxxxxx]
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
Temporal Coverage 2020-10-17T09:28:08Z/2020-11-24T15:45:05Z
Version 18.02_20200221_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2021-12-18T00:00:00Z
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]