A dataset provided by the European Space Agency

Name: Searching for IMBH candidates among Ultraluminous X-ray Sources
Published: 2018-03-29T22:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	078451
Title	Searching for IMBH candidates among Ultraluminous X-ray Sources
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0784510301
DOI	https://doi.org/10.5270/esa-5y6p2xl
Principal Investigator, PI	Dr Fabio Pintore
Abstract	A sub-sample of bright Ultraluminous X-ray Sources (L_X~(1-5)x10^40 erg/s) showspeculiar powerlaw like spectra, with no high energy turn-off and short-termvariability at the level of ~10%. These sources might host Intermediate MassBlack Holes (IMBHs) in a low/hard state, although their apparently flat spectralshape may be the effect of poor counting statistics. Here we proposesimultaneous, deep XMM- Newton and NuSTAR observations of four such objects tofind evidence either of the X-ray properties (powerlaw spectra and short termvariability) that should characterize sub-Eddington accretion onto an IMBH or ofthe characteristic spectral curvature of the Ultraluminous state.
Publications	The two ultraluminous X-ray sources in the galaxy NGC 925 \|Pintore F. Zampieri L. et al. \| MNRAS \| 479-4271 \| 2018 \| 2018MNRAS.479.4271P \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.479.4271P The (Re)appearance of NGC 925 ULX-3 a New Transient ULX \|Earnshaw Hannah P. Heida Marianne et al. \| ApJ \| 891-153 \| 2020 \| 2020ApJ...891..153E \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...891..153E 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 Investigating the nature of the ultraluminous X-ray sources in the galaxy NGC 925 \|Salvaggio Chiara Wolter A. et al. \| MNRAS \| 512-1814 \| 2022 \| 2022MNRAS.512.1814S \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.512.1814S The Variability Behavior of NGC 925 ULX-3 \|Earnshaw Hannah P. Brightman Murray et al. \| ApJ \| 934-42 \| 2022 \| 2022ApJ...934...42E \| http://ui.adsabs.harvard.edu/#abs/2022ApJ...934...42E Variability in a low-mass active galactic nucleus: oscillation or eruption? \|Webbe Robbie Young A. J. \| MNRAS \| 518-3428 \| 2023 \| 2023MNRAS.518.3428W \| http://ui.adsabs.harvard.edu/#abs/2023MNRAS.518.3428W 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 New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2017-01-18T19:45:14Z/2017-01-19T09:38:34Z
Version	21.51_20241115_1113
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	2018-03-29T22:00:00Z
Last Update	2026-07-09
Keywords	"characteristic spectral curvature", "sub sample", "sub eddington accretion", "NuSTAR", "XMM", "ultraluminous xray sources", "imbh candidates", "counting statistics", "deep xmm newton", "short term variability"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Fabio Pintore, 2018, 'Searching for IMBH candidates among Ultraluminous X-ray Sources', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-5y6p2xl
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.