| Name | 092116 |
| Title | Revealing the geometry of the hot corona in NGC 4151 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0921160201 |
| DOI | https://doi.org/10.57780/esa-x5iaahq |
| Author | European Space Agency |
| Description | We propose to observe the Seyfert galaxy NGC 4151 with XMM-Newton (50 ks) and NuSTAR (100 ks) simultaneously to the scheduled IXPE (Imaging X-ray Polarimeter Explorer) pointing. Accurate measurements of the hot corona parameters have been reported, but no significant constraints on the coronal geometry (slab, sphere, semi-sphere) have been possible so far. X-ray polarimetry has the potentiality to provide such constraints, but the signal is partly degenerate with respect to the geometrical and physical parameters of the accretion disk-corona system. To reduce them and constrain the geometrical shape of the corona, simultaneous and independent constraints on coronal temperature and optical depth, strength of the reflection components provided by a joint XMM-Newton and NuSTAR observation, are vital. |
| Publication | No observations found associated with the current proposal |
| 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 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 | 2024-01-21T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 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 |