  We present the high-resolution spectrum of the accretion-powered millisecond
pulsar XTE J0929-314 during its 2002 outburst, measured using the Low Energy
Transmission Grating Spectrometer onboard the Chandra X-ray Observatory. The
1.5-25.3 A (0.5-8.3 keV) Chandra spectrum is well fit by a power-law +
blackbody model with photon index Gamma=1.55+/-0.03, blackbody temperature
kT_bb=0.65+/-0.03 keV, and blackbody normalization R_bb,km/d_10kpc=7.6+/-0.8.
No emission or absorption features are found in the high-resolution spectrum,
with a 3 sigma equivalent width upper limit of <0.007 A at 1.5 A and <0.12 A at
24 A. The neutral absorption edge depths are consistent with the estimated
interstellar absorption along the line of sight to the source. We found no
orbital modulation of the 2-10 keV X-ray flux, to a 3 sigma upper limit of
1.1%, which implies an upper limit on the binary inclination angle of i<85deg
for a Roche-lobe-filling companion. We also present the broadband spectrum
measured over the course of the outburst by the Rossi X-ray Timing Explorer.
The XTE spectrum of XTE J0929-314 is also well fit with a power-law + blackbody
model, with average values of Gamma=1.76+/-0.03, kT_bb=0.66+/-0.06 keV, and
R_bb,km/d_10kpc=5.9+/-1.3 in the 2-50 keV energy range. The blackbody flux
remained constant over the course of the outburst, while the power-law flux was
strongly correlated to the (decreasing) flux of the source. We find that the
difference in power-law photon indices measured from Chandra and XTE spectra
can be explained by a change in the power-law photon index at low energies.
