Proposal ID | 006577 |
Title | X-rays from the brightest globular cluster of M31 |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0065770101 |
DOI | https://doi.org/10.5270/esa-f6tb4tn |
Principal Investigator, PI | Prof Frank Verbunt |
Abstract | We propose to observe G1 (=Mayall II), the brightest and most massive globular cluster of M31. It is an extremely dense and massive globular cluster, an excellent target in which to search for a bright X-ray source. ROSAT did not observe it. The primary goal of our proposal is to determine whether G1 contains an X-ray source, as a pilot observation for a later proposal. If the source is bright we can make a preliminary spectral classification (neutron-star vs. black hole binary) and a preliminary search for orbital variation.It is interesting for theory to know whether this extremely dense clustercontains a bright source; and also which fractions of bright sources areneutron-star binaries and black-hole binaries. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2001-01-11T03:15:05Z/2001-01-11T05:35:26Z |
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 | 2002-10-09T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "M31", "mayall ii", "bright sources", "neutron star binary", "xray source", "massive globular cluster", "blackhole binary", "preliminary search", "bright source", "ROSAT", "x rays", "bright xray source", "orbital variation", "dense cluster", "brightest globular cluster" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Frank Verbunt, 2002, 'X-rays from the brightest globular cluster of M31', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-f6tb4tn |