A dataset provided by the European Space Agency

Name 089070
Title A XMM-Newton monitoring of a candidate changing-look Compton thick AGN
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0890700401

DOI https://doi.org/10.5270/esa-[xxxxxxx]
Author Dr Stefano Marchesi
Description Studies of heavily obscured active galactic nuclei (AGN) suggest that the torus that causes the obscuration is patchy, rather than uniform. The line-of-sight column density (NH_los) of the obscuring material should vary over weeks to months, but such an evidence has been observed only in a few X-ray detected AGN, due to lack of large samples of heavily obscured AGN with multi-epoch observations. We propose for a XMM monitoring of NGC 1358, a nearby Compton thick (CT-) AGN with small torus covering factor and NH_los significantly larger than the torus average column density. Through this monitoring, we expect to measure significant variability in NH_los and detect a transition from CT- to Compton thin, thus improving our knowledge on the properties of the obscuring material surrounding AGN.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN
Temporal Coverage 2021-08-02T14:09:15Z/2021-08-02T17:10:55Z
Version 19.16_20210326_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 2021-08-24T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-08-24T00:00:00Z, 089070, 19.16_20210326_1200. https://doi.org/10.5270/esa-[xxxxxxx]