A dataset provided by the European Space Agency

Name: Extreme ULXs revisited: spectral state changes as a diagnostic of IMBHs
Published: 2018-01-19T23:00:00Z

Proposal ID	074224
Title	Extreme ULXs revisited: spectral state changes as a diagnostic of IMBHs
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0742240801
DOI	https://doi.org/10.5270/esa-ui476he
Principal Investigator, PI	Dr Timothy Roberts
Abstract	Intermediate-mass black holes (IMBHs) are predicted to have formed throughoutcosmic history, and to have seeded supermassive black holes; yet we still haveno clear dynamical evidence for any such object. However, recent observations ofthe most luminous of the ultraluminous X-ray sources (ULXs) are showingincreasing evidence for IMBHs, most notable of which is the apparentsub-Eddington state transitions shown by ESO 243-49 HLX-1. Here, we propose EPICToOs, triggered from Swift monitoring, for four extreme luminosity ULXs thathave observational properties consistent with the hard state for an IMBH. Wewill use these to search for sub-Eddington state transitions, that may serve asa smoking gun for the presence of an IMBH in these objects.
Publications	Classification of 4XMM-DR9 sources by machine learning \|Zhang, Yanxia, Zhao, Yongheng, \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions \|Pan, Zeyang, Qu, Zhijie, et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque, Pedro, Balaji, Shyam, \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2016-12-27T08:10:26Z/2016-12-28T00:17:06Z
Version	17.56_20190403_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	2018-01-19T23:00:00Z
Keywords	"eso 243", "smoking gun", "epic toos", "ulxs revisited", "dynamical evidence", "luminosity ulxs", "EPIC", "sub eddington", "apparent sub eddington"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Timothy Roberts, 2018, 'Extreme ULXs revisited: spectral state changes as a diagnostic of IMBHs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ui476he