A dataset provided by the European Space Agency

Name 086168
Title Linking the Short and Long delays in NGC 4151


DOI https://doi.org/10.5270/esa-[xxxxxxx]
Author Dr Abderahmen Zoghbi
Description X-ray Reverberation tracks light travel delay between the continuum and the reflected iron line. Short (1e2-1e3 s) iron band delays have been observed in many sources and are attributed to relativistic reverberation. The bright NGC4151 was the first to show these lags, but recent data is not consistent with simple reverberation models. On longer time scales, the narrow Fe K line was also found to lag the continuum by 3 days. XMM has been instrumental in both measurements. The delays at intermediate timescales (hours to 1 day) have however been inaccessible due to visibility constraints. Here, we propose to observe NGC4151 for two consecutive orbits to bridge this gap. This will be a significant step towards building a complete picture of the circumnuclear reprocessing material.
Publication No observations found associated with the 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 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 2022-01-05T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2022-01-05T00:00:00Z, 086168, 18.02_20200221_1200. https://doi.org/10.5270/esa-[xxxxxxx]