|Title||Maintaining the Ephemeris of the Geminga Pulsar Until GLAST|
|Author||Prof Jules Halpern|
|Description||The Geminga pulsar is unique among gamma-ray pulsars in having a precise and continuous, phase-connected ephemeris from 1973 up to the present. Since the demise of the Compton Gamma-Ray Observatory in June 2000, the only practical method of maintaining Geminga.s ephemeris is with X-ray observations. To extend our continuing XMM-Newton program on Geminga, we now request short observations twice per year until 2007, when GLAST and-or AGILE will resume the gamma-ray timing. The principal scientific need for a phase-connected ephemeris is to provide an absolute phase reference for ground-based observations, and to monitor glitch activity such as that which recurred in 2002.|
|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, 2008-03-29T00:00:00Z, 040026, 17.56_20190403_1200. https://doi.org/10.5270/esa-i3cgdwb|