| Proposal ID | 086053 |
| Title | Nailing Down the Population of Intrinsically X-ray Weak BAL Quasars |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860530201 |
| DOI | https://doi.org/10.57780/esa-t1vwmlv |
| Principal Investigator, PI | Prof William Brandt |
| Abstract | There are few intrinsically X-ray weak AGNs reliably identified to date. Suchsystems may exist preferentially in broad absorption line (BAL) quasars, whereit is challenging to ascribe the observed X-ray weakness to absorption vs.intrinsic X-ray weakness. We selected two candidates for intrinsically X-rayweak BAL quasars from the well-defined z ~ 2 LBQS BAL quasar sample. Theseobjects are only weakly detected in the current Chandra observations, hamperingrigorous conclusions about their nature. We thus propose 85 ks XMM-Newtonobservations for the two candidates, in order to confirm their intrinsicallyX-ray weak nature, obtain the fraction of intrinsically X-ray weak BAL quasars,and probe the underlying physics. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2021-02-06T13:45:29Z/2021-02-07T16:40:29Z |
| Version | 18.02_20200221_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 | 2022-02-24T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "exist preferentially", "XMM-Newton", "xray weakness", "xray weak", "XMM", "defined z", "85 xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof William Brandt, 2022, 'Nailing Down the Population of Intrinsically X-ray Weak BAL Quasars', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-t1vwmlv |