Statistical significance of the 59-s periodicity of Geminga and 1EO630 + 178

Details Statistical significance of the 59-s periodicity of Geminga and 1EO630 + 178 Statistical significance of the 59-s periodicity of Geminga and 1EO630 + 178

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.316..131b&link_type=abstract

Nature (ISSN 0028-0836), vol. 316, July 11, 1985, p. 131, 132.

Mathematics

Probability

17

Cos-B Satellite, Gamma Ray Astronomy, Periodic Variations, Sas-2, X Ray Sources, Monte Carlo Method, Probability Distribution Functions

Scientific paper

Bignami et al. have reported evidence for an increasing 59-s period in the X-ray emission from the high-energy γ-ray source Geminga. Their claim is based on results of a search for periodicities at around 59 s in the emission from the X-ray source 1E 0630+178, which has been proposed as a possible counterpart of Geminga. The authors show that the primitive indication by SAS-2 of a 59-s periodicity in the γ-ray flux from Geminga is not statistically significant. As a consequence, the identification of 1E 0630+178 with the γ-ray source 2CG 195+04 (Geminga) through a 59-s pulsation cannot be claimed.

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