| Name | 078294 |
| Title | A Changing-Look AGN Caught in the Act |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0782940101 |
| DOI | https://doi.org/10.5270/esa-not7rgk |
| Author | European Space Agency |
| Description | We propose XMM-Newton observations of a newly discovered changing look AGN, NGC 6418. These rare objects undergo dramatic changes in their optical spectra and other properties, including the X-ray absorbing column density. Optical and IR observations of NGC 6418 showed that it changed its look from Seyfert Type 1.9 to Type 1 and back again within 3 years. These changes involved both large variations in intrinsic luminosity and clear changes in obscuration. These observations will provide information on the absorbing column, the X-ray luminosity, and spectral shape at a known optical state. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-11-18T20:17:08Z/2016-11-19T02:40:28Z |
| 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 | 2017-12-29T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2017, A Changing-Look Agn Caught In The Act, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-not7rgk |