A dataset provided by the European Space Agency

Name 020223
Title TRACKING THE ANDROMEDA Z-SOURCE CANDIDATE RX J0042.6+4115
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202230201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202230301
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202230401
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0202230501

DOI 10.5270/esa-63pxg4n
Author Dr ROBIN BARNARD
Description A Z-source candidate has been identified in the core of M31 using data from existing XMM-Newton observations. Z-sources are perhaps the most extreme form of neutron star binary; powered by Roche lobe overflow from a low mass secondary via disc accretion, their X-ray luminosities can reach 10^39 erg-s,and exhibit complex correlations between luminosity and X-ray spectra so thatthey trace out Z-shapes in colour-colour diagrams over a few days. We propose a programme of four 20 ks observations over 4 days to trace the Z-track, which will conclusively prove whether or not the candidate is a Z-source. Also, the programme would access for the first time variability over time-scales of a few days in the 120 sources in the field of view.
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The deep XMM-...
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 Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-08-19T00:00:00Z, 020223, 17.56_20190403_1200. https://doi.org/10.5270/esa-63pxg4n