Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Chandra Proper Motion for PSR J1809-2332   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.

20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph