A dataset provided by the European Space Agency

Name: A XMM-Newton monitoring of a candidate changing-look Compton thick AGN
Published: 2022-03-18T00:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	086298
Title	A XMM-Newton monitoring of a candidate changing-look Compton thick AGN
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0862980101
DOI	https://doi.org/10.57780/esa-89hpnik
Principal Investigator, PI	Dr Stefano Marchesi
Abstract	Studies of heavily obscured active galactic nuclei (AGN) suggest that the torusthat causes the obscuration is patchy, rather than uniform. The line-of-sightcolumn density (NH_los) of the obscuring material should vary over weeks tomonths, 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-epochobservations. We propose for a XMM monitoring of NGC 1358, a nearby Comptonthick (CT-) AGN with small torus covering factor and NH_los significantly largerthan the torus average column density. Through this monitoring, we expect tomeasure significant variability in NH_los and detect a transition from CT- toCompton thin, thus improving our knowledge on the properties of the obscuring material surrounding AGN.
Publications	Compton-thick AGN in the NuSTAR Era. VIII. A joint NuSTAR-XMM-Newton Monitoring of the Changing-look Compton-thick AGN NGC 1358 \|Marchesi S. Zhao X. et al. \| ApJ \| 935-114 \| 2022 \| 2022ApJ...935..114M \| http://ui.adsabs.harvard.edu/#abs/2022ApJ...935..114M The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2021-02-25T00:25:39Z/2021-02-25T10:30:39Z
Version	21.51_20241115_1113
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	2022-03-18T00:00:00Z
Last Update	2026-07-09
Keywords	"ngc 1358", "XMM-Newton", "heavily obscured agn", "multi epoch", "NGC 1358", "obscuring material", "XMM", "compton thin", "xmm newton"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Stefano Marchesi, 2022, 'A XMM-Newton monitoring of a candidate changing-look Compton thick AGN', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-89hpnik
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.