Name | 082432 |
Title | Determining the Nature of the Extreme Off-States in ULX Pulsars with NGC5907 ULX |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824320201 |
DOI | https://doi.org/10.57780/esa-d2kgv1r |
Author | Dr Dominc Walton |
Description | We now know that some of the most luminous members of the ultraluminous X-ray source (ULX) population are actually powered by highly super-Eddington pulsars, making them the most extreme accretors known. Three such systems are now known\: M82 X-2, NGC 7793 P13, and NGC 5907 ULX. These sources all exhibit unusual .off.-states in which their X-ray flux drops by virgul2 orders of magnitude (or more). These off-states are fairly rare, but recent monitoring with Swift shows that NGC 5907 ULX is now entering one. Here we propose an ambitious series of six 60 ks observations of NGC 5907 ULX (360 ks in total) designed to determine the nature of these events. This is of critical importance, as these off-states may offer a means to determine the magnetic fields of these systems. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2019-06-12T18:55:44Z/2020-11-07T15:37:06Z |
Version | 18.02_20200221_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 | 2021-11-28T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Dominc Walton, 2021, 082432, 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-d2kgv1r |