
| Proposal ID | 014981 |
| Title | Study of the Iron Line and Low Energy Features in 4U 1728-34 with XMM-Newton |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149810101 |
| DOI | https://doi.org/10.5270/esa-s97apfw |
| Principal Investigator, PI | Dr Tiziana Di Salvo |
| Abstract | We propose a 30 ks XMM observation of 4U 1728-34 to perform a detailed study ofthe iron K-alpha line and other low energy features. This source shows a broad(~1 keV FWHM) iron line: several hypotheses can be proposed to explain the linewidth (e.g. relativistic and Doppler effects in an accretion disk, Comptonscattering, line-blending), and we expect that XMM will be able to resolve thecomplex line shape and to constrain the various models proposed. These kind ofsources are also expected to be rich of emission lines and absorption edges atlow energy (below ~2 keV), because of the presence of a photoionized accretiondisk corona (ADC). These low energy features are an important diagnostic toolfor the physical conditions of the emitting regions. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, RGS1, RGS2 |
| Temporal Coverage | 2002-10-03T22:05:51Z/2002-10-04T05:55:25Z |
| 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 | 2003-11-07T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "diagnostic tool", "alpha line", "line width", "XMM-Newton", "complex line shape", "emission lines", "physical conditions", "low energy", "emitting region", "XMM", "doppler effects", "4u 1728", "absorption edges", "line blending", "compton scattering", "accretion disk", "xmm newton", "iron line" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Tiziana Di Salvo, 2003, 'Study of the Iron Line and Low Energy Features in 4U 1728-34 with XMM-Newton', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-s97apfw |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |