| Name | 004435 |
| Title | The X-ray emission of composite galaxies |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0044350101 |
| DOI | https://doi.org/10.5270/esa-1grw6fa |
| Author | Dr Ioannis Georgantopoulos |
| Description | We propose to observe 3 composite low redshift galaxies, z=0.02-0.03, classified as HII-Seyfert-2 composites by Moran et al. 1996. This important class of object presents optical spectra with the characteristics of HII galaxies and very weak or absent signatures of AGN activity, despite the very high soft X-ray luminosities. Similar composite objects have also been detected in deep ROSAT surveys (eg Boyle et al. 1995) constituting a significant fraction of the extragalactic sources at faint fluxes. Our proposed XMM observations will demonstrate whether these objects harbour a powerful obscured AGN or alternatively a low luminosity naked (ie very weak or absent broad-line region) AGN and will help to constrain the contribution of narrow line AGN to the XRB |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-04-20T11:22:15Z/2002-10-21T06:05:47Z |
| 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 | 2003-11-14T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2003-11-14T00:00:00Z, 004435, 17.56_20190403_1200. https://doi.org/10.5270/esa-1grw6fa |