Name | 065480 |
Title | X-ray vs. H2O maser emission in AGN |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0654800101 |
DOI | https://doi.org/10.5270/esa-epumdsj |
Author | Dr Paola Castangia |
Description | H2O megamaser radio emission provides a unique way to map accretion disks and estimate masses of the nuclear engines in AGN. An accurate analysis of X-ray spectra instead allows us to estimate column densities providing a direct measure of the nuclear activity. So far, H2O maser sources associated to AGN tend to show a high column density or are even Compton-thick. Unfortunately, the statistics of these studies are still poor, because of the lack of X-ray data for a large percentage of known maser galaxies. Here we propose to take advantage of the higher sensitivity of XMM to follow-up a small sample of sources detected by Swft-XRT, for which the low number of counts in the spectra above 2 keV prevented us to derive an accurate value of the column density. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2010-08-26T00:47:59Z/2011-03-05T00:27:23Z |
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 | 2012-03-30T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Paola Castangia, 2012, 065480, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-epumdsj |