A dataset provided by the European Space Agency

Name 076385
Title X-rays and mode changes in PSR J2021+4026, the first variable gamma-ray pulsar


DOI https://doi.org/10.5270/esa-dx15whq
Author Dr Massimiliano Razzano
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, 2017-01-11T23:00:00Z, 076385, 17.56_20190403_1200. https://doi.org/10.5270/esa-dx15whq