We propose XMM-Newton observations of a newly discovered changing look AGN, NGC6418. These rare objects undergo dramatic changes in their optical spectra andother properties, including the X-ray absorbing column density. Optical and IRobservations of NGC 6418 showed that it changed its look from Seyfert Type 1.9to Type 1 and back again within 3 years. These changes involved both largevariations in intrinsic luminosity and clear changes in obscuration. Theseobservations will provide information on the absorbing column, the X-rayluminosity, and spectral shape at a known optical state.
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 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.
European Space Agency, Ms Triana Almeyda, 2017, 'A Changing-Look AGN Caught in the Act', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-not7rgk
