A Chandra Proper Motion for PSR J1809-2332

TL;DR

This paper reports a new Chandra observation measuring the proper motion of pulsar PSR J1809-2332, supporting its association with a supernova remnant and revealing a wind nebula trail.

Contribution

First measurement of PSR J1809-2332's proper motion using Chandra data over 11 years, linking it to a supernova remnant and analyzing its wind nebula.

Findings

Proper motion of 0.30±0.06 arcseconds over 11 years

Association with SNR G7.5-1.7 supported by motion and nebula analysis

Detection of a wind nebula trail pointing back to the SNR

Abstract

We report on a new Chandra exposure of PSR J1809-2332, the recently discovered pulsar powering the bright EGRET source 3EG J1809-2328. By registration of field X-ray sources in an archival exposure, we measure a significant proper motion for the pulsar point source over an ~11 year baseline. The shift of 0.30+/-0.06" (at PA= 153.3+/-18.4) supports an association with proposed SNR parent G7.5-1.7. Spectral analysis of diffuse emission in the region also supports the interpretation as a hard wind nebula trail pointing back toward the SNR.