|Title||Probing AGN Variability on 10-100 kyr Timescales|
|Author||Dr Kevin Schawinski|
|Description||Following the discovery of IC 2497 and Hanny.s Voorwerp, the citizen scientists taking part in the Galaxy Zoo project have identified a sample of low-redshift galaxies with extended AGN-photoionized clouds indicative of a Seyfert- luminosity AGN. We select a sample of 7 such galaxies where the lack of infrared emission makes it plausible that the AGN phase illuminating the cloud has shut down within the light travel time to the cloud. We propose to use XMM-Newton to observe these objects, as in IC 2497, to test whether these AGN have indeed shut down and thus providing a measurement of significant AGN variability on previously inaccessible timescales.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2013-03-27T00:00:00Z, 067266, 17.56_20190403_1200. https://doi.org/10.5270/esa-xgznjli|