Low mass (<10^6Msun) AGN are important not just for understanding the evolutionof supermassive black holes, but they vary rapidly through accretion states,allowing the study of physical processes which are unaccessible with larger massAGN. NGC 4395 (virgul10^5Msun) is the brightest and most variable low mass AGN.Previous observations suggest that the X-ray spectrum shows both harder whenbrighter and softer when brighter behaviour. This transition is not seen in anyother single AGN and may represent a change from coronal synchrotron to discblack body seed photons. This scenario cannot be confirmed without Nustara??shigh energy band. Thus, we propose 6x50 ks NuSTAR+6x25 XMM simultaneouspointings. We will also coordinate with HiPERCAM@GTC to obtain precise lags to probe the outer disc.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-12-10T05:05:57Z/2022-12-30T21:52:45Z
Version
20.09_20221024_1724
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, Dr Federico Vincentelli, 2024, 'THE FIRST SIMULTANEOUS NUSTAR/XMM-NEWTON OBSERVATIONS OF NGC 4395', 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-pl7dlab
