| Proposal ID | 086168 |
| Title | Linking the Short and Long delays in NGC 4151 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0861680101 |
| DOI | https://doi.org/10.57780/esa-uk7yt9a |
| Principal Investigator, PI | Dr Abderahmen Zoghbi |
| Abstract | X-ray Reverberation tracks light travel delay between the continuum and thereflected iron line. Short (1e2-1e3 s) iron band delays have been observed inmany sources and are attributed to relativistic reverberation. The brightNGC4151 was the first to show these lags, but recent data is not consistent withsimple reverberation models. On longer time scales, the narrow Fe K line wasalso found to lag the continuum by 3 days. XMM has been instrumental in bothmeasurements. The delays at intermediate timescales (hours to 1 day) havehowever been inaccessible due to visibility constraints. Here, we propose toobserve NGC4151 for two consecutive orbits to bridge this gap. This will be asignificant step towards building a complete picture of the circumnuclear reprocessing material. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-11-26T06:46:16Z/2020-11-29T18:29:34Z |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2022-01-05T00:00:00Z |
| Keywords | "narrow fe", "relativistic reverberation", "NGC 4151", "XMM", "visibility constraints", "iron band delays", "time scales", "intermediate timescales", "simple reverberation models", "consecutive orbits", "complete picture", "step towards building", "reflected iron line", "short 1e2 1e3", "circumnuclear reprocessing material", "bright ngc4151", "ngc 4151" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Abderahmen Zoghbi, 2022, 'Linking the Short and Long delays in NGC 4151', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-uk7yt9a |