| Proposal ID | 067272 |
| Title | Ne V-selected heavily obscured QSOs at the epoch of the X-ray background |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0672720101 |
| DOI | https://doi.org/10.5270/esa-jayz9j5 |
| Principal Investigator, PI | Dr Roberto Gilli |
| Abstract | Despite extensive searches over a wide wavelength range, the population ofheavily obscured, Compton-thick AGN still remains elusive. In particular, athigh redshifts and luminosities only a few Compton-thick objects have beendiscovered. We propose a pilot program of moderately deep XMM exposures (40 to80 ksec each) to observe 3 luminous QSOs at z~1, which is the epoch where thebulk of the missing X-ray background is expected to be produced. These QSOsare likely to suffer from heavy obscuration. The targets have been selected fromthe SDSS DR5 based on their strong NeV3427A emission. The proposedobservations will unambiguously determine their obscuration degree. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2012-04-15T18:32:59Z/2012-04-16T20:50:31Z |
| Version | 21.51_20241115_1113 |
| 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 | 2013-04-26T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "3427a emission", "wide wavelength range", "heavily obscured", "pilot program", "heavily obscured qsos", "heavy obscuration", "extensive searches", "moderately deep xmm", "SDSS", "xray background", "sdss dr5", "luminous qsos", "XMM", "obscuration degree", "compton thick agn", "compton thick objects" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Roberto Gilli, 2013, '[Ne V]-selected heavily obscured QSOs at the epoch of the X-ray background', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-jayz9j5 |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |