A dataset provided by the European Space Agency

Name: Observing Aql X-1 to understand the hard X-ray emission from NS transients
Published: 2017-10-13T22:00:00Z

Proposal ID	074352
Title	Observing Aql X-1 to understand the hard X-ray emission from NS transients
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743520201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743520301
DOI	https://doi.org/10.5270/esa-xie59bd
Principal Investigator, PI	Dr John Tomsick
Abstract	At low luminosities, the X-ray spectra of neutron star (NS) LMXB transientsoften contain two components: one is due to thermal emission from the NS surfaceand is reasonably well-understood, while the other is a hard power-law ofunknown origin. Recently, observations of Cen X-4 in quiescence with XMM-Newtonand the Nuclear Spectroscopic Telescope Array (NuSTAR) have provided the firstlook at the broadband spectrum. The hard component is sharply cutoff above 10keV and is consistent with a bremsstrahlung emission mechanism. We propose ajoint XMM-Newton, NuSTAR, and Swift Target of Opportunity program to observe AqlX-1 in order to compare the broadband spectrum from this system to that of CenX-4.
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 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	2016-09-28T15:45:52Z/2016-09-28T23:41:43Z
Version	PPS_NOT_AVAILABLE
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	2017-10-13T22:00:00Z
Last Update	2025-08-04
Keywords	"XMM", "low luminosities", "xray spectra", "XMM-Newton", "NuSTAR", "ns surface", "swift target", "broadband spectrum", "hard xray emission", "xmm newton", "ns transients", "thermal emission", "cen x", "aql x", "hard component", "hard power law", "bremsstrahlung emission mechanism"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr John Tomsick, 2017, 'Observing Aql X-1 to understand the hard X-ray emission from NS transients', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-xie59bd