| Proposal ID | 067418 |
| Title | Accreting pulsars in quiescence |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0674180101 |
| DOI | https://doi.org/10.5270/esa-hisou1r |
| Principal Investigator, PI | Mr Victor Doroshenko |
| Abstract | After more than 40 years of studies, surprisingly little is known on theemission of accreting pulsars at low-luminosity. It was suggested that alreadyat 10^{35} ergs/s the onset of a centrifugal barrier should inhibit theaccretion. On the other hand, pulsations during quiescence were reported forthree transient pulsars, namely 1A~0535+262, 4U~1145-619, and 1A~1118-61.Accretion nature of the emission is suggested by short-term variability,energetics, hard X-ray spectrum and pulsations. It is unclear, however how theaccretion proceeds in this case. Here, we propose to observe 1A~0535+262,4U~1145-619, and 1A~1118-61 with XMM-Newton to study their spectral and timingproperties to clarify the nature of pulsed emission at low luminosities. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2012-02-28T07:18:04Z/2012-02-28T23:59:39Z |
| 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 | 2013-03-23T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "low luminosities", "short term variability", "xmm newton", "centrifugal barrier", "accreting pulsars", "pulsed emission", "XMM-Newton", "surprisingly little", "accretion proceeds", "namely 1a", "1145 619", "hard xray spectrum", "XMM", "transient pulsars", "low luminosity" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr Victor Doroshenko, 2013, 'Accreting pulsars in quiescence', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-hisou1r |