| Proposal ID | 020223 |
| Title | TRACKING THE ANDROMEDA Z-SOURCE CANDIDATE RX J0042.6+4115 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202230201 |
| DOI | https://doi.org/10.5270/esa-63pxg4n |
| Principal Investigator, PI | Dr ROBIN BARNARD |
| Abstract | A Z-source candidate has been identified in the core of M31 using data fromexisting XMM-Newton observations. Z-sources are perhaps the most extreme form ofneutron star binary; powered by Roche lobe overflow from a low mass secondaryvia disc accretion, their X-ray luminosities can reach 10^39 erg/s,and exhibitcomplex correlations between luminosity and X-ray spectra so thatthey trace outZ-shapes in colour-colour diagrams over a few days. We propose a programme offour 20 ks observations over 4 days to trace the Z-track, which willconclusively prove whether or not the candidate is a Z-source. Also, theprogramme would access for the first time variability over time-scales of a fewdays in the 120 sources in the field of view. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-07-16T16:17:05Z/2004-07-19T20:23:32Z |
| 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 | 2005-08-19T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "J0042.6", "thatthey trace", "colour colour diagrams", "conclusively prove", "z sources", "time scales", "existing xmm newton", "z shapes", "z track", "xray luminosities", "xray spectra", "roche lobe overflow", "XMM-Newton", "exhibit complex correlations", "z source candidate", "z source", "time variability", "M31", "neutron star binary", "120 sources", "XMM" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr ROBIN BARNARD, 2005, 'TRACKING THE ANDROMEDA Z-SOURCE CANDIDATE RX J0042.6+4115', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-63pxg4n |