A dataset provided by the European Space Agency

Name: Probing the inner disk origin of the iron line in SAX J1808.4 3658
Published: 2016-05-06T22:00:00Z
License: https://creativecommons.org/licenses/by-nc/3.0/igo

Proposal ID	072449
Title	Probing the inner disk origin of the iron line in SAX J1808.4 3658
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0724490201
DOI	https://doi.org/10.5270/esa-3omrjqt
Principal Investigator, PI	Dr Tiziana Di Salvo
Abstract	We propose a 100-ks triggered XMM observation of the accreting millisecondpulsar J1808 in its next outburst to gather strong evidence of the inner diskorigin of its broad iron emission line and to perform spin and orbital timing.The accretion disk during short-outburst transients is expected to be truncatedboth at the inner radius (by the neutron star magnetosphere) and at an outerradius of a few hundreds Gravitational radii because the disk is rapidlyemptying. The ring-like shape of the disk will produce a clear double-peakedline profile, unique signature of the disk origin of the line. The cleardetection of this profile by XMM will give the ultimate proof of the disk originof the Fe line. This is a re-submission of a proposal approved in priority C for the XMM AO10.
Publications	On the timing properties of SAX J1808.4-3658 during its 2015 outburst \|Sanna A. Di Salvo T. et al. \| MNRAS \| 471-463 \| 2017 \| 2017MNRAS.471..463S \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.471..463S NuSTAR and XMM-Newton broad-band spectrum of SAX J1808.4-3658 during its latest outburst in 2015 \|Di Salvo T. Sanna A. et al. \| MNRAS \| 483-767 \| 2019 \| 2019MNRAS.483..767D \| http://ui.adsabs.harvard.edu/#abs/2019MNRAS.483..767D Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z
Instrument	EPN, OM, RGS1, RGS2
Temporal Coverage	2015-04-11T03:01:49Z/2015-04-12T09:18:29Z
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	2016-05-06T22:00:00Z
Last Update	2026-07-09
Keywords	"inner radius", "re submission", "neutron star magnetosphere", "iron line", "inner disk origin", "fe line", "J1808.4", "xmm ao10", "XMM", "disk origin", "gravitational radii", "outer radius", "perform spin", "accretion disk", "sax j1808", "short outburst transients", "triggered xmm"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Tiziana Di Salvo, 2016, 'Probing the inner disk origin of the iron line in SAX J1808.4 3658', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-3omrjqt
Rights	Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.