| Name | 086126 |
| Title | Classification of a New Type of X-ray Weak Quasar |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0861260101 |
| DOI | https://doi.org/10.57780/esa-c6f071f |
| Author | European Space Agency |
| Description | Luminous X-ray emission is an ubiquitous property of quasars. Small populations of type 1 quasars have displayed weak X-ray emission, generally due to absorption or variability effects. We have discovered several X-ray weak SDSS quasars that do not fit easily into any of the known categories. We propose to obtain 30-50 ks XMM-Newton observations for three of these exceptional X-ray weak quasars. We will determine reliably whether there is X-ray variability or X-ray absorption, and then classify the possible causes for their observed X-ray weakness. Understanding this new type of X-ray weak quasar might provide new insights into the X-ray corona and its environment. It will also allow us to constrain the missed fraction of SMBH growth in extragalactic X-ray surveys. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2021-01-25T04:39:38Z/2021-04-07T18:45:32Z |
| Version | 19.16_20210326_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 | 2022-05-05T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2022, Classification Of A New Type Of X-Ray Weak Quasar, 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-c6f071f |