| Proposal ID | 086035 |
| Title | X-ray study of a candidate transitional millisecond pulsar binary |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860350101 |
| DOI | https://doi.org/10.57780/esa-ucx30bd |
| Principal Investigator, PI | Prof Zhongxiang Wang |
| Abstract | Among the unassociated sources detected by the Fermi Gamma-ray Space Telescope,we find one 2.5-hr binary from our multi-wavelength studies. The source, with anX-ray counterpart, has an optical spectrum typical of accretion disks in X-raybinaries, and thus is likely a transitional millisecond pulsar (MSP) system inthe disk state. Such systems can switch between the states of being a pure MSPand having an accretion disk around the MSP. Here we request an 11-ksobservation of the source for further studies. A spectrum of the source will beobtained to check whether its X-ray emission is consistent with those of redbacktype of MSPs. We will also search for fast and large-amplitude flux variations,which is a distinguishing feature of the transitional systems in the disk state. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-11-12T13:12:40Z/2020-11-12T17:06:00Z |
| Version | 18.02_20200221_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 | 2021-12-01T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "transitional systems", "accretion disk", "xray binary", "optical spectrum typical", "xray counterpart", "x ray", "unassociated sources", "xray emission", "redback type", "multi wavelength", "hr binary", "accretion dis", "amplitude flux variations", "pure msp" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Zhongxiang Wang, 2021, 'X-ray study of a candidate transitional millisecond pulsar binary', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-ucx30bd |