| Name | 055094 |
| Title | Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0550940201 |
| DOI | https://doi.org/10.5270/esa-ihmhh8o |
| Author | European Space Agency |
| Description | A campaign of simultaneous X-ray and optical observations of unabsorbed Seyfert 2s has already proved successful in the AO-5,leading to the discovery of the first .true. Seyfert 2 without broad line region.We therefore intend to pursue our strategy,proposing to observe with XMM-Newton a sample of .bona-fide. Seyfert 2 galaxies with no X-ray absorption.The selected sources are a conservative subsample taken from the Panessa & Bassani (2002) sample,including only Seyfert 2s where no column density in excess of the Galactic one has ever been observed in the X-rays,within sensitive limits.The primary goal of this proposal is to find more objects unabsorbed in the X-rays and without broad optical lines,which represent a serious challenge to simple AGN Unification Models. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-08-03T04:30:55Z/2008-08-03T09:29:29Z |
| 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 | 2009-08-23T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2009, Unabsorbed Type 2 Seyfert Galaxies: A Challenge For Unified Models, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ihmhh8o |