PSR J0751+18: a New Binary Millisecond Pulsar in an EGRET Source Error Box
Session 37 -- Pulsars
Display presentation, Thursday, January 13, 9:30-6:45, Salons I/II Room (Crystal Gateway)

## [37.03] PSR J0751+18: a New Binary Millisecond Pulsar in an EGRET Source Error Box

S.C. Lundgren, A.F. Zepka, J.M. Cordes (Cornell University), W.E. Becker, G. Kanbach, and J. Trumper (Max Planck Institute fuer Extraterrestrische Physik, Garching, Germany), J.M. Fierro (Stanford University)

We have discovered a new binary millisecond pulsar in an EGRET source error box. The discovery was made in a pulsar search conducted at Arecibo observatory targeted at the unidentified EGRET high energy $\gamma$-ray source error boxes. The pulsar has a 3.5 ms spin period, an 8.5 hour orbital period, a 430 MHz flux density of 10 mJy, and a dispersion measure of 30 $pc cm^{-3}$. The mass function is 0.001 M$\odot$, setting a lower limit on the companion mass of 0.14 M$\odot$ for an assumed pulsar mass of 1.4 M$\odot$. We present results of our analysis of ROSAT and EGRET observations to determine whether the high energy emission is associated with the millisecond pulsar. Possible models for such a system are considered.