A dataset provided by the European Space Agency

Proposal ID 020434
Title X-RAY OBSERVATIONS OF OPTICALLY-SELECTED TYPE 2 QUASAR CANDIDATES
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204340101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204340201
DOI https://doi.org/10.5270/esa-e7ecq6p
Principal Investigator, PI Dr ANDREW PTAK
Abstract Using the Sloan Digital Sky Survey, we have identified a large number ofcandidate type 2 quasars, i.e., possibly obscured AGN of both high luminosityand high redshift. We are conducting a comprehensive follow-up of this samplewith XMM, HST, SIRTF and ground-based telescopes. From this sample, we haveselected seven candidates with z=0.3-0.8 which are among the most luminousobjects in the sample. We wish to use XMM both to confirm their AGN character(by detecting an X-ray continuum) and to quantify their degree of obscuration(by measuring the column density of soft X-ray absorption). If these objects areconfirmed to be type 2 quasars by these XMM observations, we will have found animportant new way to discover substantial numbers of this important class.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-01-12T22:53:29Z/2004-08-20T18:35:45Z
Version 17.56_20190403_1200
Mission Description The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 2005-09-14T00:00:00Z
Keywords "obscured agn", "luminous objects", "XMM", "xray continuum", "quasar candidates", "x ray", "column density", "candidate type", "soft xray absorption", "HST", "agn character"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr ANDREW PTAK, 2005, 'X-RAY OBSERVATIONS OF OPTICALLY-SELECTED TYPE 2 QUASAR CANDIDATES', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-e7ecq6p