A dataset provided by the European Space Agency

Name 078451
Title Searching for IMBH candidates among Ultraluminous X-ray Sources
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0784510301

DOI https://doi.org/10.5270/esa-5y6p2xl
Author Dr Fabio Pintore
Description A sub-sample of bright Ultraluminous X-ray Sources (L_Xvirgul(1-5)x10^40 erg-s) shows peculiar powerlaw like spectra, with no high energy turn-off and short-term variability at the level of virgul10%. These sources might host Intermediate Mass Black Holes (IMBHs) in a low-hard state, although their apparently flat spectral shape may be the effect of poor counting statistics. Here we propose simultaneous, deep XMM- Newton and NuSTAR observations of four such objects to find evidence either of the X-ray properties (powerlaw spectra and short term variability) that should characterize sub-Eddington accretion onto an IMBH or of the characteristic spectral curvature of the .Ultraluminous state.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2017-01-18T19:45:14Z/2017-01-19T09:38:34Z
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 2018-03-29T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2018-03-29T22:00:00Z, 078451, 17.56_20190403_1200. https://doi.org/10.5270/esa-5y6p2xl