| 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 |
| 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 |
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| 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 |
| Last Update | 2025-01-27 |
| Keywords | "soft xray absorption", "obscured agn", "agn character", "luminous objects", "column density", "quasar candidates", "x ray", "xray continuum", "candidate type", "XMM", "HST" |
| 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 |