A Possible optical counterpart for the triple pulsar system PSR B1620-26
1994
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 sec of the nominal pulsar position with V approximately equal to 20. This magnitude is consistent with a main-sequence cluster member with M approximately equal to 0.45 solar mass. However, this star may be blended with fainter stars, and the probability of a chance superposition is nonnegligible.
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