A dataset provided by the European Space Agency

Name: GSN 069: a recent AGN re-activation or a long-lasting Tidal Disruption Event
Published: 2020-01-21T23:00:00Z

Proposal ID	082368
Title	GSN 069: a recent AGN re-activation or a long-lasting Tidal Disruption Event
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0823680101
DOI	https://doi.org/10.5270/esa-gvbrszn
Principal Investigator, PI	Dr Giovanni Miniutti
Abstract	We request an XMM-Newton and HST/STIS observation of GSN 069, an ultra-soft,unabsorbed, highly variable X-ray source optically classified as a Seyfert 2AGN. Its high Eddington ratio (0.5) makes GSN 069 an exceptional high Eddingtonratio true Seyfert 2 galaxy candidate. The data so far suggest two possibleinterpretations: 1) a recent re-activation of the AGN after a period of lowactivity or quiescence or 2) an unusual (but not unique) long-lived outburst dueto a Tidal Disruption Event (TDE). With our joint XMM/HST program we aim atclarifying the nature of this most exceptional source and derive constraints onthe formation and evolution of BLR, disc winds, and AGN X-ray coronae in thefirst scenario, or on the nature of rare sustained TDEs in the second.
Publications	Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus \|Miniutti G. Saxton R. D. et al. \| Natur \| 573-381 \| 2019 \| 2019Natur.573..381M \| http://ui.adsabs.harvard.edu/#abs/2019Natur.573..381M X-ray astronomy comes of age \|Wilkes Belinda J. Tucker Wallace et al. \| Natur \| 606-261 \| 2022 \| 2022Natur.606..261W \| http://ui.adsabs.harvard.edu/#abs/2022Natur.606..261W Repeating tidal disruptions in GSN 069: Long-term evolution and constraints on quasi-periodic eruptions models \|Miniutti G. Giustini M. et al. \| A&A \| 670-93 \| 2023 \| 2023A&A...670A..93M \| http://ui.adsabs.harvard.edu/#abs/2023A&A...670A..93M Alive and kicking: A new QPE phase in GSN 069 revealing a quiescent luminosity threshold for QPEs \|Miniutti G. Giustini M. et al. \| A&A \| 674-1 \| 2023 \| 2023A&A...674L...1M \| http://ui.adsabs.harvard.edu/#abs/2023A&A...674L...1M Searching for quasi-periodic eruptions using machine learning \|Webbe Robbie Young A. J. \| RASTI \| 2-238 \| 2023 \| 2023RASTI...2..238W \| http://ui.adsabs.harvard.edu/#abs/2023RASTI...2..238W 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 From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Probing orbits of stellar mass objects deep in galactic nuclei with quasiperiodic eruptions \|Zhou Cong Huang Lei et al. \| PhRvD \| 109-103031 \| 2024 \| 2024PhRvD.109j3031Z \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3031Z
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2018-12-24T03:51:53Z/2018-12-24T21:26:53Z
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2020-01-21T23:00:00Z
Last Update	2025-01-27
Keywords	"agn re activation", "gsn 069", "re activation", "makes gsn 069", "ultra soft", "disc winds", "xmm newton", "eddington ratio", "XMM-Newton", "hst program", "eddington ratio ``", "XMM", "agn xray coronae", "galaxy '' candidate", "lived outburst", "rare sustained tdes", "low activity", "HST"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Giovanni Miniutti, 2020, 'GSN 069: a recent AGN re-activation or a long-lasting Tidal Disruption Event', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gvbrszn