| Proposal ID | 086323 |
| Title | The recreation of the X-ray corona in the changing-look AGN 1ES 1927+654 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0863230101 |
| DOI | https://doi.org/10.57780/esa-hk6dtqk |
| Principal Investigator, PI | Dr Claudio Ricci |
| Abstract | Our group recently witnessed the destruction and recreation of the X-ray coronain a nearby changing-look AGN. This source underwent an optical/UV outburstafter which the X-ray power-law, ubiquitously detected in AGN, completelydisappeared. Our monitoring revealed that a few months after the event, as theluminosity of the source increased, the corona re-appeared. The X-ray source ishowever still very cool and optically thin, and it might fully reform in thenext months. We propose here several XMM-Newton/NuSTAR observations to monitorthe reappearance of the hard component and the evolution of the plasmaproperties. The proposed observations provide a unique opportunity to study thecreation of the X-ray corona, as well as to understand changing-look transitions |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-05-03T22:43:40Z/2021-01-12T18:20:40Z |
| Version | 18.02_20200221_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 | 2022-02-04T00:00:00Z |
| Last Update | 2026-03-04 |
| Keywords | "plasma properties", "hard component", "source increased", "XMM", "xmm newton", "optically thin", "completely disappeared", "xray power law", "xray corona", "changing look transitions", "XMM-Newton", "NuSTAR", "uv outburst", "corona re appeared", "xray source" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Claudio Ricci, 2022, 'The recreation of the X-ray corona in the changing-look AGN 1ES 1927+654', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-hk6dtqk |