A dataset provided by the European Space Agency

Name 067186
Title 1ES 1927+654: an extreme case of true type 2 Seyfert


DOI https://doi.org/10.5270/esa-1lomno9
Author Dr Francesca Panessa
Description We propose a simultaneous XMM-Newton and TNG optical and Near-Infrared
observation of 1ES 1927+654, a type 2 Seyfert galaxy with no X-ray absorption.
The ROSAT and Chandra observations of this source revealed persistent, rapid and
large scale variations requiring the line-of-sight to the nucleus to be free
from absorption. However, the optical spectrum is typical of Seyfert 2 galaxies.
Notably, the measured intrinsic neutral X-ray column density is not enough to
obscure the broad-line region. Simultaneous XMM-Newton, optical and
Near-Infrared observations are mandatory to confirm the lack of broad emission
lines and the lack of X-ray absorption, excluding variability issues. The lack
of a BLR in this bright AGN will be difficult to be interpreted within the current Unified Models.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2011-05-20T06:08:25Z/2011-05-20T14:05:54Z
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 2012-06-07T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Francesca Panessa, 2012, 067186, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1lomno9