A dataset provided by the European Space Agency

Proposal ID 040079
Title A POSSIBLE SPECTRAL SIGNATURE OF ULTRACOMPACT LOW MASS X-RAY BINARIES
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400790101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400790301

DOI https://doi.org/10.5270/esa-fqagk74
Principal Investigator, PI Dr Lara Sidoli
Abstract ASCA and BeppoSAX obs. of ultracompact (Porb<1hr) LMXBs revealed 2 possiblespectral differences compared to other systems.These are (1)the presence of adiscrete feature near 0.7keV (attributed to local overabundance of Ne), and(2)the parameter values when fit with a disk-blackbody and Comptonizedcontinuum.Chandra and XMM observations complicated the picture, confirming a Neoverabundance only in few ultracompact sources, suggesting a possiblevariability. We wish to test2possible explanations for this variability, and toclarify the emerging picture of a spectral signature for the ultracompactsystems using XMM.We propose here to observeX1832-330,the only persistentultracompact LMXRB in a globular cluster still not investigated with high resolution spectroscopy.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-09-22T00:50:14Z/2006-10-20T15:42:40Z
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 2007-11-23T00:00:00Z
Last Update 2025-01-27
Keywords "local overabundance", "observex1832 330", "comptonized continuum", "7kev attributed", "ultracompact systems", "test2possible explanations", "2the parameter values", "globular cluster", "1hr lmxbs", "resolution spectroscopy", "emerging picture", "disk blackbody", "BeppoSAX", "persistent ultracompact lmxrb", "ultracompact sources", "1the presence", "ne overabundance", "spectral signature", "XMM", "bepposax obs", "ultracompact porb"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Lara Sidoli, 2007, 'A POSSIBLE SPECTRAL SIGNATURE OF ULTRACOMPACT LOW MASS X-RAY BINARIES', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fqagk74