
| Proposal ID | 078486 | 
| Title | Observation of the quiescent X-ray emission of Swift J1749.4 2807 | 
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0784860101 | 
| DOI | https://doi.org/10.5270/esa-wz5mzu0 | 
| Principal Investigator, PI | Dr Paolo DAvanzo | 
| Abstract | Swift J1749.4-2807 is the first (and only) eclipsing accreting X-ray millisecondpulsar. At variance with all the other transient low mass X-ray binaries, SwiftJ1749 is the only source showing eclipses and a hard component in its X-rayquiescent spectrum. This opens the unique opportunity to discriminate betweenmodels that have been proposed for the quiescent emission of neutron startransients. Based on a detailed feasibility we need to follow Swift J1749 forthree orbital periods, totalling 100 ks, to probe the quiescent spectrum with aneclipse mapping technique. | 
| Publications | 
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 | 
| Temporal Coverage | 2017-03-01T07:09:31Z/2017-03-02T13:01:11Z | 
| 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 | 2018-03-29T22:00:00Z | 
| Last Update | 2025-08-04 | 
| Keywords | "quiescent xray emission", "orbital periods", "eclipse mapping technique", "swift j1749", "neutron star transients", "hard component", "J1749.4", "quiescent spectrum", "xray quiescent spectrum", "quiescent emission" | 
| Publisher And Registrant | European Space Agency | 
| Credit Guidelines | European Space Agency, Dr Paolo D'Avanzo, 2018, 'Observation of the quiescent X-ray emission of Swift J1749.4 2807', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-wz5mzu0 |