| Name | 010044 |
| Title | What is the nature of BAL quasars |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0100440101 |
| DOI | https://doi.org/10.5270/esa-8564fwo |
| Author | Dr Bernd Aschenbach |
| Description | GT-About 10-15% of optically selected QSO have optical/UV spectra showing deep, wide absorption troughs, displayed to the blue of their corresponding emission lines. The X-ray properties of BALQSOs as a class are unknown. In a study of BALQSOs from publicly available ROSAT data mainly upper limits were found. This implies that the objects are either highly absorbed, intrinsically underluminous in X-rays, or both. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-05-28T05:00:34Z/2001-05-28T20:56:36Z |
| Version | 17.56_20190403_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 | 2002-07-23T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bernd Aschenbach, 2002, 010044, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-8564fwo |