A dataset provided by the European Space Agency

Name 082445
Title Taking the beat of the UNSeEN (The Ultraluminous NS populatioN of ULXs)


DOI https://doi.org/10.5270/esa-govki6q
Author Prof Gian Luca Israel
Description Due to their super-Eddington (L_Edd) X-ray luminosity ULXs have long been considered the ideal sample where to look for BHs of intermediate mass. The discovery of three ULXs showing pulsations unambiguously associated them to NSs exceeding 500 times their L_Edd. These discoveries challenge our understanding of accretion physics and pose a key question about the nature of the ULXs: are they a population hosting both BHs and NSs, or is there a dominant new NS population with extreme properties? This proposal involves a large fraction of the ULX community and is aimed at answering the above question by tripling the number of ULXs where sensitive searches for X-ray pulsations and cyclotron features can be carried out. We expect to detect 2-3 new PULXs, thus doubling the current sample.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2018-05-11T21:25:50Z/2018-12-30T10:30:18Z
Version 17.56_20190403_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 2020-01-17T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2020-01-17T23:00:00Z, 082445, 17.56_20190403_1200. https://doi.org/10.5270/esa-govki6q