New X-ray observations toward PSR J1826-1256

We present the results of XMM-Newton observations toward the pulsar PSR J1826$-$1256, which lies at 5${}^{\mathrm{\prime }}$.4 from the centroid of the TeV source HESS J1826$-$130. These data show an elongated nebula with the pulsar located in the northern border with the emission in the direction of the peak of the very high energy source. The spectral study of the X-ray emission shows a clear softening of the photon index with increasing distance from the pulsar. We discuss the connection among the pulsar, its nebula, and the HESS source.