| Proposal ID | 082039 |
| Title | X-ray view of a new changing-look AGN discovered by LAMOST quasar survey |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0820390101 |
| DOI | https://doi.org/10.5270/esa-d0bvsft |
| Principal Investigator, PI | Dr Su Yao |
| Abstract | Few active galactic nuclei (AGNs) changed from Type 1 to Type 1.8-2.0, or viceversa. The nature of the transition is still not understood. We propose anXMM-Newton observation on a new changing-look AGN, which was discovered inLAMOST quasar survey. The object transitioned from Type 1.9 to Type 1. Inparticular, it was serendipitously detected by the XMM-Newton slew survey beforethe transition. Thus a new X-ray spectroscopy not only can make a directcomparison of its X-ray flux before and after the type transition, but also canconstrain the absorption column density along the line of sight, shedding lighton the nature of the changing-look. Moreover, a simultaneous photometric dataobtained by OM will provide clues of variation in optical band along with the X-rays. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-07-08T01:46:22Z/2018-07-08T09:31:22Z |
| 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 | 2019-07-26T22:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "XMM-Newton", "changing look", "shedding light", "x ray", "xray flux", "xmm newton", "absorption column density", "lamost quasar survey", "object transitioned", "xray spectroscopy", "changing look agn", "vice versa", "photometric data", "optical band" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Su Yao, 2019, 'X-ray view of a new changing-look AGN discovered by LAMOST quasar survey', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-d0bvsft |