|Title||Spectral and temporal variations of the X-ray pulsar RX J0720.4-3125|
|Author||Dr Markus Hohle|
|Description||RX J0720.4-3125 (RX J0720) belongs to a group of seven isolated and radio-quiet X-ray pulsars discovered during the ROSAT all sky survey; the so called ..Magnificent Seven" (M7). Among them, RX J0720 occupies an unique place inasmuch it exhibits spectral and temporal variations on time scales of years that are not seen for the other M7. These variations could be the result of a sudden event (e.g. a glitch), or they are periodic in nature, e.g. caused by free precession. In either case one expects to see further spectral-temporal evolution. Recent XMM-Newton data (rev. 2076 and 2087) could better fit to a glitch, both from the spectral and the temporal behaviour. However, the variable phase lag between soft (120-400eV) and hard (400-1000eV) X-rays [abridge]|
|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, 2013-10-09T00:00:00Z, 069007, 17.56_20190403_1200. https://doi.org/10.5270/esa-lt9e5e3|