| Proposal ID | 092116 |
| Title | Revealing the geometry of the hot corona in NGC 4151 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0921160201 |
| DOI | https://doi.org/10.57780/esa-x5iaahq |
| Principal Investigator, PI | Ms Vittoria Elvezia Gianolli |
| Abstract | We propose to observe the Seyfert galaxy NGC 4151 with XMM-Newton (50 ks) andNuSTAR (100 ks) simultaneously to the scheduled IXPE (Imaging X-ray PolarimeterExplorer) pointing. Accurate measurements of the hot corona parameters have beenreported, but no significant constraints on the coronal geometry (slab, sphere,semi-sphere) have been possible so far. X-ray polarimetry has the potentialityto provide such constraints, but the signal is partly degenerate with respect tothe geometrical and physical parameters of the accretion disk-corona system. Toreduce them and constrain the geometrical shape of the corona, simultaneous andindependent constraints on coronal temperature and optical depth, strength ofthe reflection components provided by a joint XMM-Newton and NuSTAR observation, are vital. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-12-17T02:21:27Z/2022-12-17T18:33:07Z |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2024-01-21T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | XMM-Newton, OM, RGS, EPIC, X-ray, Multi-Mirror, SAS |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Ms Vittoria Elvezia Gianolli, 2024, 'Revealing the geometry of the hot corona in NGC 4151', 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-x5iaahq |