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
Keywords	"re activation", "eddington ratio", "gsn 069", "lived outburst", "agn xray coronae", "XMM", "galaxy '' candidate", "eddington ratio ``", "agn re activation", "ultra soft", "hst program", "low activity", "HST", "XMM-Newton", "makes gsn 069", "disc winds", "rare sustained tdes", "xmm newton"
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