A dataset provided by the European Space Agency

Name: UNVEILING BLACK HOLES AND NEUTRON STARS IN ULXs
Published: 2020-07-12T22:00:00Z

Proposal ID	084234
Title	UNVEILING BLACK HOLES AND NEUTRON STARS IN ULXs
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0842340201
DOI	https://doi.org/10.5270/esa-4ar2lfp
Principal Investigator, PI	Mr Fabio Pintore
Abstract	A sub-sample of bright ULXs (Lx~(1-5)e40 erg/s) shows peculiar powerlaw likespectra in the 0.3- 10 keV band, with no high energy turn-off and short-termvariability at the level of ~10%. These sources might host Intermediate MassBlack Holes (IMBHs) in a hard state, although their apparently flat spectra maybe the effect of low counting statistics. However, hard states with low energyspectral cut-off can indicate the presence of super-Eddington accreting neutronstars or stellar mass BHs. Here we propose simultaneous, deep XMM-Newton andNuSTAR observations of three best candidates to find evidence either of IMBHs,accreting sub-Eddington and with hard powerlaw spectra and high short termvariability, or of the characteristic spectral shape of the super-Eddington accretion.
Publications	The rare X-ray flaring activity of the ultraluminous X-ray source NGC 4559 X7 \|Pintore Fabio Motta S. et al. \| MNRAS \| 504-551 \| 2021 \| 2021MNRAS.504..551P \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.504..551P Ionized emission and absorption in a large sample of ultraluminous X-ray sources \|Kosec P. Pinto C. et al. \| MNRAS \| 508-3569 \| 2021 \| 2021MNRAS.508.3569K \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.508.3569K Modelling multiwavelength emission of Ultra-luminous X-ray Sources accreting above the Eddington limit \|Ambrosi E. Zampieri L. et al. \| MNRAS \| 509-4694 \| 2022 \| 2022MNRAS.509.4694A \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.509.4694A 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 Searching for quasi-periodic eruptions using machine learning \|Webbe Robbie Young A. J. \| RASTI \| 2-238 \| 2023 \| 2023RASTI...2..238W \| http://ui.adsabs.harvard.edu/#abs/2023RASTI...2..238W Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies \|Cann Jenna M. Weaver Kimberly A. et al. \| ApJ \| 961-178 \| 2024 \| 2024ApJ...961..178C \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...961..178C 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
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2019-06-16T18:19:55Z/2019-06-17T15:16:35Z
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	2020-07-12T22:00:00Z
Last Update	2025-01-27
Keywords	"hard powerlaw spectra", "kev band", "neutron stars", "short term variability", "stellar mass bhs", "bright ulxs lx", "sub sample", "characteristic spectral shape", "XMM-Newton", "accreting sub eddington", "apparently flat spectra", "5e40 erg", "NuSTAR", "super eddington accretion", "unveiling blackhole", "XMM", "deep xmm newton", "low counting statistics"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Mr Fabio Pintore, 2020, 'UNVEILING BLACK HOLES AND NEUTRON STARS IN ULXs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-4ar2lfp