Maintaining the Ephemeris of the Geminga Pulsar Until GLAST

Details Maintaining the Ephemeris of the Geminga Pulsar Until GLAST Maintaining the Ephemeris of the Geminga Pulsar Until GLAST

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop...11h&link_type=abstract

XMM-Newton Proposal ID #04002601

Computer Science

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Geminga, Xmm-Newton Proposal 04002601

Scientific paper

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.

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