| Name | 020431 |
| Title | XMM-NEWTON OBSERVATIONS OF THE SECOND-BRIGHTEST QUASAR, PHL 1811 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204310101 |
| DOI | https://doi.org/10.5270/esa-nfrdmwj |
| Author | Prof KAREN LEIGHLY |
| Description | Followup spectroscopy of VLA FIRST survey quasar candidates discovered a very bright quasar in the South Galactic Cap. Strangely, this quasar was not detected in the ROSAT All Sky Survey. Followup coordinated HST and Chandra observations showed that it is intrinsically very X-ray weak, pointing to unusual and extreme conditions in the X-ray emitting corona. We propose an XMM-Newton observation of this unusual quasar to study the spectrum of an intrinsically X-ray weak object, to potentially confirm rapid X-ray variability tentatively identified in the Chandra observation in this very luminous quasar, and to monitor its X-ray state. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-11-01T09:06:42Z/2004-11-01T18:15:21Z |
| 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 | 2005-12-02T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2005-12-02T00:00:00Z, 020431, 17.56_20190403_1200. https://doi.org/10.5270/esa-nfrdmwj |