|Title||XMM Monitoring of the Evolving AXP 4U 0142+61|
|Author||Prof Victoria Kaspi|
|Description||4U 0142+61 is a 8.7-s "anomalous X-ray pulsar" (AXP) which, in data from our RXTE monitoring program, recently showed pulsations that were slowly but steadily getting brighter (24% increase in 6 yr), in concert with a slow evolution of its soft X-ray pulse profile. Such behavior is unprecedented for an AXP and challenges the current magnetar model. We request XMM observations of the source in Cycle 6 in order to monitor its phase-averaged flux and its spectrum, to try to shed light on the physical origin of this surprising behavior, as well as to better characterize recent and apparently ongoing bursting activity in the source.|
|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, 2009-04-03T00:00:00Z, 050386, 17.56_20190403_1200. https://doi.org/10.5270/esa-zfmheju|