The ``COS-B/EGRET 1997'' Geminga ephemeris

Details The ``COS-B/EGRET 1997'' Geminga ephemeris The ``COS-B/EGRET 1997'' Geminga ephemeris

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410..568m&link_type=abstract

The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 568-572 (1997).

Computer Science

Databases

Pulsars, Ephemerides, Almanacs, And Calendars, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc.

Scientific paper

We derive an ephemeris for the Geminga pulsar using all available EGRET, COS-B, and SAS-2 data spanning 24 yr. A cubic ephemeris predicts the rotational phase of Geminga with errors smaller than 50 milliperiods. The braking index obtained is 17+/-1. If Geminga continues to rotate without glitch as it has for at least 23 yr, we expect this ephemeris to continue to describe the phase with an error less than 100 milliperiods until the year 2008. Statistically significant timing residuals are detected in the EGRET data with an RMS value ~20 milliperiods. The addition of a sinusoidal term to the ephemeris reduces the residuals to an RMS value of less than 6 milliperiods. This sinusoid corresponds to a planet of mass 1.7/sin i M⊕ orbiting Geminga at a radius of 3.3 AU, although these residuals could be caused by timing noise rather than a planet.

Affiliated with

Also associated with

No associations

Rating

The ``COS-B/EGRET 1997'' Geminga ephemeris does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The ``COS-B/EGRET 1997'' Geminga ephemeris, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The ``COS-B/EGRET 1997'' Geminga ephemeris will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-833135