A dataset provided by the European Space Agency

Proposal ID 020501
Title DO ALL LMXBS FORM WITHIN GLOBULAR CLUSTERS?
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0205010101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0205010201

DOI https://doi.org/10.5270/esa-8cw6l4w
Principal Investigator, PI Dr JIMMY IRWIN
Abstract Recent studies have found that a large fraction of LMXBs within ellipticalgalaxies reside within globular clusters, prompting claims that all LMXBs areformed within globular clusters. If so, the total X-ray luminosity emanatingfrom LMXBs should scale directly with the globular cluster specific frequency,S_N. Conversely, if there is a significant field-born population of LMXBs thisrelation will be flatter. We have begun a program to test this claim, but weneed to observe galaxies with high values of S_N to confirm our findings. Wepropose observations of NGC4278 (S_N=8.7) and NGC4526 (S_N=7.7), two nearbygas-poor galaxies with high well-constrained values of S_N. These observationswill put stringent constraints on the field-born population of LMXBs in galaxies.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-05-23T17:13:02Z/2004-06-05T19:14:21Z
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 2005-07-04T00:00:00Z
Last Update 2025-08-04
Keywords "globular clusters ?.", "ngc4278 s_n", "elliptical galaxy reside", "ngc4526 s_n", "lmxbs form", "nearby gas", "globular clusters", "stringent constraints", "field born population", "constrained values", "NGC4278", "prompting claims"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr JIMMY IRWIN, 2005, 'DO ALL LMXBS FORM WITHIN GLOBULAR CLUSTERS?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-8cw6l4w