Speaker
Description
We report the discovery of an unidentified point-like very-high-energy (VHE) gamma-ray source around the PSR J1740+1000 named LHAASO J1740+0948.
Its significance is $12 \sigma$ ($5.4 \sigma$) above $25 \rm{TeV}$ ($100 \rm{TeV}$) and the best-fit position is $\rm{(R.A., decl)}=(265.01 \pm 0.03, 9.79 \pm 0.04)$. The energy spectrum can be described by a single power-law function with an index of $-3.15 \pm 0.17$. PSR J1740+1000 is a middle-aged (114 kyr) pulsar with a long X-ray tail. This means that TeV radiation may come from (1) high energy electrons escaping from the pulsar/PWN and scattering the interstellar radiation field, i.e, pulsar halo. But the TeV source and PSR J1740+1000 position offsets are difficult to interpret; (2) upscattering of CMB photons by the ultrarelativistic particles from the PWN tail. We speculate the particles were re-accelerated at the tail of the bow shock.
