Proposal ID | 040079 |
Title | A POSSIBLE SPECTRAL SIGNATURE OF ULTRACOMPACT LOW MASS X-RAY BINARIES |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400790101 |
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 |
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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 | 2025-08-04 |
Keywords | "ne overabundance", "test2possible explanations", "bepposax obs", "ultracompact porb", "7kev attributed", "local overabundance", "XMM", "2the parameter values", "globular cluster", "disk blackbody", "resolution spectroscopy", "emerging picture", "comptonized continuum", "ultracompact systems", "1the presence", "1hr lmxbs", "spectral signature", "BeppoSAX", "persistent ultracompact lmxrb", "observex1832 330", "ultracompact sources" |
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 |