| Name | 083048 |
| Title | THE HIGH-ENERGY CUT-OFF IN HIGH-Z/HIGH-L QSOS |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0830480101 |
| DOI | https://doi.org/10.5270/esa-2cg9cxd |
| Author | European Space Agency |
| Description | We propose NuSTAR observations of two bright (FX>5 10^-13 cgs, LX>10^46 erg/s) radio-quiet QSOs at z>2, plus short XMM exposures for each of them: our total time request is 320k NuSTAR and 70ks XMM. By looking at rest-frame energies up to 300 keV, our goal is to measure unambiguously the presence of spectral cut-offs at rest-frame energies up to E c=500 keV. This is not possible for local targets, where NuSTAR is just sensitive to E c<250 keV. The two brightest sources of a sample of four have been successfully observed in Cycle 3. These observations allowed to measure for the first time E c in distant, luminous QSOs. The proposed observations will allow to build a a small but unique sample of high-z, high-LX QSOs with accurate Ec measurements, to test current coronal models. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-01-14T11:07:23Z/2019-04-24T07:00:23Z |
| 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 | 2020-05-20T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2020, The High-Energy Cut-Off In High-Z/High-L Qsos, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2cg9cxd |