We request to monitor 4 obscured HMXB composed by a neutron star and asupergiant OB companion (IGR J16320-4751, IGR J16393-4643, IGR J16418-4532, IGRJ18027-2016 in order of preference) in order to study their spectral evolutionalong their orbital period, particularly the hydrogenic column density. We planto observe IGR J16320-4751 8 times 5 ks and IGR J16393-4643, IGR J16418-4532 andIGR J18027-2016 5 times 7 ks for a total of 145 ks. Because of the stronginteraction between the supergiant wind and the X-ray radiation of the accretedmaterial, these sources are ideal laboratories to study the relation between thecolumn density and the orbital period and derive the properties of the stellarwind.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-08-14T22:18:21Z/2008-09-17T03:39:30Z
Version
17.56_20190403_1200
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.
European Space Agency, Dr Juan Antonio Zurita Heras, 2009, 'Monitoring the hydrogenic column density in obscured HMXB', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-uupqyp7
