A dataset provided by the European Space Agency

Name: X-rays and mode changes in PSR J2021+4026 comma the first variable gamma-ray pulsar
Published: 2017-01-11T23:00:00Z

Proposal ID	076385
Title	X-rays and mode changes in PSR J2021+4026, the first variable gamma-ray pulsar
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0763850101
DOI	https://doi.org/10.5270/esa-dx15whq
Principal Investigator, PI	Dr Massimiliano Razzano
Abstract	Among the radio-quiet pulsars discovered by Fermi, an unique source is PSRJ2021+4026 in the Gamma Cygni supernova remnant. This pulsar has shocked thehigh-energy astrophysics community by featuring a simultaneous change in fluxand frequency derivative, breaking the long-standing paradigm of pulsars asstable gamma-ray sources. Monitoring the gamma-ray mode changes at differentenergies is key to understand if such events are due to global or local changesin the magnetosphere geometry and/or configurations. We propose a ToO with XMMto study the X-ray spectral and timing behaviour of PSR J2021+4026 following amode change. This will provide the first contemporary X and gamma-ray study ofpulsar mode changes, key to decrypt this intriguing, but still obscure, aspect of pulsar physics.
Publications	X-Ray Study of Variable Gamma-Ray Pulsar PSR J2021+4026 \|Wang, H. H., Takata, J., et al. \| ApJ \| 856-98 \| 2018 \| 2018ApJ...856...98W \| http://ui.adsabs.harvard.edu/#abs/2018ApJ...856...98W Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars \|Coti Zelati, Francesco, Torres, Diego F., et al. \| MNRAS \| 492-1025 \| 2020 \| 2020MNRAS.492.1025C \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.492.1025C Strongly pulsed thermal X-rays from a single extended hot spot on PSR J2021+4026 \|Rigoselli, Michela, Mereghetti, Sandro, et al. \| A&A \| 646-117 \| 2021 \| 2021A&A...646A.117R \| http://ui.adsabs.harvard.edu/#abs/2021A&A...646A.117R Classification of 4XMM-DR9 sources by machine learning \|Zhang, Yanxia, Zhao, Yongheng, \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Multiwavelength observations of PSR J2021+4026 across a mode change reveal a phase shift in its X-ray emission \|Razzano, M., Fiori, A., et al. \| A&A \| 676-91 \| 2023 \| 2023A&A...676A..91R \| http://ui.adsabs.harvard.edu/#abs/2023A&A...676A..91R A phase-resolved Fermi-LAT analysis of the mode-changing pulsar PSR J2021+4026 shows hints of a multipolar magnetosphere \|Fiori, A., Razzano, M., et al. \| A&A \| 685-A70 \| 2024 \| 2024A&A...685A..70F \| http://ui.adsabs.harvard.edu/#abs/2024A&A...685A..70F From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque, Pedro, Balaji, Shyam, \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
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 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	2017-01-11T23:00:00Z
Keywords	"pulsar mode", "magnetosphere geometry", "contemporary x", "XMM", "psr j2021", "frequency derivative", "xray spectral", "gamma ray mode", "radio quiet pulsars", "energy astrophysics community", "pulsar physics", "gamma ray", "x rays", "standing paradigm"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Massimiliano Razzano, 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