We propose three 60 ksec and one 140 ks XMM-Newton observations of the dippingLow-Mass X-ray Binaries (LMXBs) XB 1254-690 and 4U 1746-371. We will obtain upto virgul12 ks of dip data per 4U 1254-690 observation which will be sufficient toreliably measure the dip properties and the changes in the absorber, compared tothe persistent emission. The 140 ks of the 4U 1746-12 observation, added to aprevious 50 ks XMM-Newton observation on this source, will be enough to detectwith high significance the Fe XXVI absorption feature seen in the previousobservation at low confidence in the persistent emission and Fe XXV and/or FeXXVI absorption features in the dipping emission. The significant detection ofthese lines will allow the absorber properties to be unambigously characterized.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-09-12T15:00:39Z/2007-03-09T20:45:47Z
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 Maria Diaz Trigo, 2009, 'Characterization of the most highly-ionized absorbers in dipping LMXBs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-mpw9veg
