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A 59-second period in the very high energy gamma-ray emission from the Geminga pulsar

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Abstract

An analysis of our observations of the Geminga object with the GT-48 ground-based gamma-ray telescope has shown that its very-high-energy gamma-ray flux is modulated with a 59-s period. The 59-s period and its time derivative previously inferred from satellite data have been confirmed. According to our data, the period was 61.94 s in 1997 at MSD=50573. The statistical significance of this result is (1−4.5)×10−4.

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Authors and Affiliations

  1. Crimean Astrophysical Observatory, p/o Nauchnyi, Crimea, 334413, Ukraine

    Yu. I. Neshpor & A. A. Stepanyan

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  1. Yu. I. Neshpor
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  2. A. A. Stepanyan
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__________

Translated from Pis’ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 27, No. 12, 2001, pp. 923–928.

Original Russian Text Copyright © 2001 by Neshpor, Stepanyan.

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Neshpor, Y.I., Stepanyan, A.A. A 59-second period in the very high energy gamma-ray emission from the Geminga pulsar. Astron. Lett. 27, 794–798 (2001). https://doi.org/10.1134/1.1424362

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  • DOI: https://doi.org/10.1134/1.1424362

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