| Proposal ID | 001244 |
| Title | The X-ray Baldwin Effect: z=2 Fe-K and Compton Humps as Ionized Disk Diagnostics |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0012440101 |
| DOI | https://doi.org/10.5270/esa-p9j9boh |
| Principal Investigator, PI | Dr Martin Elvis |
| Abstract | By observing 4 bright radio quiet z~2 quasars we propose to test the X-ray Baldwin Effect: that the relativistically broadened Fe-K line becomes weakeras AGNs become more luminous. This needs to be done with radio-quiet quasars to avoid beaming dilution. We will also test the proposed explanation of thiseffect: that the accretion disk becomes fully ionized. this can be done by measuring the Compton hump relative to the Fe-K line, since Compton scatteringoperates independent of ionization. To measure the Compton hump with XMM EPIC requires z~2. The 4 proposed quasars have exposure times chosen to give 3sigmalimits 1/10 of the low luminosity values, assuring an unambiguous result. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-01-14T23:14:51Z/2001-05-24T18:21:18Z |
| Version | 21.51_20241115_1113 |
| 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 | 2003-01-05T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "compton humps", "xray baldwin effect", "low luminosity values", "3sigma limits", "compton hump", "radio quiet quasars", "relativistically broadened fe", "compton scattering operates", "compton hump relative", "baldwin effect ':", "EPIC", "XMM", "avoid beaming dilution", "xmm epic", "accretion disk", "ionized disk diagnostics" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Martin Elvis, 2003, 'The X-ray Baldwin Effect: z=2 Fe-K and Compton Humps as Ionized Disk Diagnostics', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-p9j9boh |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |