| Name | 076385 |
| Title | X-rays and mode changes in PSR J2021+4026, the first variable gamma-ray pulsar |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0763850101 |
| DOI | https://doi.org/10.5270/esa-dx15whq |
| Author | European Space Agency |
| Description | Among the radio-quiet pulsars discovered by Fermi, an unique source is PSR J2021+4026 in the Gamma Cygni supernova remnant. This pulsar has shocked the high-energy astrophysics community by featuring a simultaneous change in flux and frequency derivative, breaking the long-standing paradigm of pulsars as stable gamma-ray sources. Monitoring the gamma-ray mode changes at different energies is key to understand if such events are due to global or local changes in the magnetosphere geometry and/or configurations. We propose a ToO with XMM to study the X-ray spectral and timing behaviour of PSR J2021+4026 following a mode change. This will provide the first contemporary X and gamma-ray study of pulsar mode changes, key to decrypt this intriguing, but still obscure, aspect of pulsar physics. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2015-12-20T10:15:58Z/2015-12-22T01:24:17Z |
| Version | 17.56_20190403_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 | 2017-01-11T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2017, X-Rays And Mode Changes In Psr J2021+4026 Comma The First Variable Gamma-Ray Pulsar, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dx15whq |