ZTF has enabled the discovery of a new class of LINERs turning on into AGNwith dramatic optical spectroscopic transformations. For the most rapidtransition into a NLS1, real-time monitoring revealed the presence of aprominent soft excess and a luminous X-ray flare delayed with respect to theoptical rise by 2 months. The proposed program will test physical mechanismsdriving this new class of changing-look LINERs with joint XMM/NuSTARobservations by measuring the response of the reprocessed hard X-ray continuumin these nine objects. We wish to map out the structure of the accretion flowstate change, view for the first time this new class of changing-look LINERs inthe hard X-rays, and contrast their spectral properties with that of broad line and changing-look Seyferts.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2020-06-19T17:32:15Z/2020-11-22T11:47:21Z
Version
18.02_20200221_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.
European Space Agency, Ms Sara Frederick, 2021, 'The First X-ray View of a New Class of Changing-Look AGN with XMM and NuSTAR', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-3dr30i8
