| Name | 067978 |
| Title | CONTINUING MONITORING OF NGC 4151 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0679780101 |
| DOI | https://doi.org/10.5270/esa-tdkn7ct |
| Author | Prof Andrzej A. Zdziarski |
| Description | We propose to continue the monitoring of the X-ray brightest Seyfert galaxy NGC 4151 with integral, in order to measure its spectra as a function of the hard X-ray flux level. We will correlate the high energy spectral cutoff with other continuum parameters to determine the main physical mechanism driving the variability. We will also disentangle the contributions to the reflection hump from close and distant reflectors, and correlate those with the narrow iron line variability to determine the nature of the thick reprocessing medium and the geometry of cold matter surrounding the source. We will finally probe for the existence of a hard non-thermal tail. We request four observations of 200 ks each, for which we will propose four 10 ks accompanying XMM-Newton observations. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2012-05-13T04:37:28Z/2012-12-10T19:02:20Z |
| Version | 17.56_20190403_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 | 2014-01-19T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Andrzej A. Zdziarski, 2014, 067978, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-tdkn7ct |