A possible optical counterpart for the triple pulsar system PSR B1620-26

Charles D. Bailyn*, Eric P. Rubinstein, Terrence M. Girard, Dana I. Dinescu, Frederic A. Rasio, Brian Yanny

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We have searched deep optical images of the globular cluster M4 for a possible optical counterpart for the third body in the PSR B1620-26 system. We identify as a possible optical counterpart a star located within 0″.3 of the nominal pulsar position with V ≈ 20. This magnitude is consistent with a main-sequence cluster member with M ≈ 0.45 M. However, this star may be blended with fainter stars, and the probability of a chance superposition is nonnegligible.

Original languageEnglish (US)
Pages (from-to)L89-L92
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - Oct 1 1994


  • Globular clusters: individual (M4)
  • Pulsars: individual (PSR B1620-26)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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