A dataset provided by the European Space Agency

Name 014758
Title XMM Observations of Hard, Optically-Faint QSOs Discovered with ASCA
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580401
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580501

DOI https://doi.org/10.5270/esa-v0qnuo0
Author Dr Yoshihiro Ueda
Description We propose observations of medium-z QSOs with hard X-ray spectra in a bright,
hard-band selected sample of the ASCA Medium Sensitivity Survey. These objects
are considered to be bright (hence rare) counterparts of ..optically faint.
objects detected at much fainter fluxes, which contribute a major part of the
hard X-ray background. Due to their brightness, this sample gives us an ideal
opportunity to investigate the nature of the key population that makes up the
CXB. The purpose of the XMM observations is to reveal the origin of the hardness
of their spectra. This study is critical for understanding of the origin of the
CXB, and for a test of the standard AGN synthesis models based on the unified
scheme of the AGNs, in particular, on the presence of luminous type-2 QSOs.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2002-12-27T20:55:42Z/2003-08-09T10:44:54Z
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 2004-09-11T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Yoshihiro Ueda, 2004, 014758, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-v0qnuo0