|Title||The dark side of the bursting pulsar|
|Author||Dr Victor Doroshenko|
|Description||GRO J1744−28 is a unique source appearing as an X-ray pulsar and a peculiar burster. This unusual combination is thought to be related to moderate field Bvirgul5e11G which is higher than in old millisecond, but lower than in normal X- ray pulsars. Given field estimate, it the source is expected to switch to the so-called "propeller" regime in quiescene, with only non-pulsed thermal emission from neutron stars surface still to be expected. However serendipuous observations in quiescence revealed a spectrum fully compatible outburst spectrum rather than that expected from a pulsar in propeller . It is thus unclear whether accretion is actually inhibited. We thus propose a 50ks observation to investigate the physical origin of the observed X-ray emission.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2020-05-06T22:00:00Z, 082112, 17.56_20190403_1200. https://doi.org/10.5270/esa-j65xlje|