A dataset provided by the European Space Agency

Name 055094
Title Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0550940201

DOI 10.5270/esa-ihmhh8o
Author Dr Stefano Bianchi
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 Simultaneous X-ray and optical observations of true type 2 Seyfert galaxies . Bianchi, Stefano, Panessa, Francesca, et all. . MNRAS . 426-3225 . 2012 . 2012MNRAS.426.3225B ,
Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
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, 2009-08-23T00:00:00Z, 055094, 17.56_20190403_1200. https://doi.org/10.5270/esa-ihmhh8o