| Name | 089040 |
| Title | PULSATION TRANSIENCE IN SMC X-1 DURING SUPERORBITAL PERIOD EXCURSION |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0890400101 |
| DOI | https://doi.org/10.57780/esa-tlu97u5 |
| Author | European Space Agency |
| Description | Accreting pulsar SMC X-1 exhibits a superorbital cycle likely caused by a warped precessing accretion disk, which drives behaviors like pulsation transience and varying spectral obscuration levels. The superorbital cycle is typically virgul55 days but has excursions, driven by instability in the disk geometry, where the period increases to 44 days. There exists no broad-band spectral and timing coverage of superorbital excursion. This proposal asks for simultaneous NuSTAR and XMM observations to sample the upcoming 2022 excursion. A unique opportunity to use tomography to probe the fluctuating disk geometry and investigate the effect of excursion on obscuration levels, pulse shape, and pulsation transience. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2021-05-10T00:49:55Z/2022-05-09T18:30:54Z |
| Version | PPS_NOT_AVAILABLE |
| 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 | 2023-06-22T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2023, Pulsation Transience In Smc X-1 During Superorbital Period Excursion, PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.57780/esa-tlu97u5 |