The proper motion of Geminga's optical counterpart

@article{Bignami1993ThePM,
  title={The proper motion of Geminga's optical counterpart},
  author={G. Bignami and P. Caraveo and S. Mereghetti},
  journal={Nature},
  year={1993},
  volume={361},
  pages={704-706}
}
THE strong γ-ray source Geminga was first observed by the satellite SAS-21,2 and later seen by the COS-B satellite3,4. An association with the peculiar X-ray source 1E0630 + 178 was proposed5, suggesting that Geminga is a nearby neutron star (∼100 pc from Earth) which is not visible as a radio pulsar. Searches for its optical counterpart yielded as the best candidate a very faint (mv=25.5) object, G″, which was proposed on the basis of its colours6–8. The association of Geminga with 1E0630+178… Expand
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