A dataset provided by the European Space Agency

Name 082368
Title GSN 069: a recent AGN re-activation or a long-lasting Tidal Disruption Event


DOI https://doi.org/10.5270/esa-gvbrszn
Author Dr Giovanni Miniutti
Description 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 2 AGN. Its high Eddington ratio (0.5) makes GSN 069 an exceptional high Eddington ratio ..true Seyfert 2 galaxy. candidate. The data so far suggest two possible interpretations: 1) a recent re-activation of the AGN after a period of low activity or quiescence or 2) an unusual (but not unique) long-lived outburst due to a Tidal Disruption Event (TDE). With our joint XMM-HST program we aim at clarifying the nature of this most exceptional source and derive constraints on the formation and evolution of BLR, disc winds, and AGN X-ray coronae in the first scenario, or on the nature of rare sustained TDEs in the second.
Publication No observations found associated with the current proposal
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 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 2020-01-21T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2020-01-21T23:00:00Z, 082368, 17.56_20190403_1200. https://doi.org/10.5270/esa-gvbrszn