Speaker
Description
Spiders, are compact binary millisecond pulsars .These systems consist of neutron stars in tight orbits with low-mass companions, which are gradually ablated by the pulsar wind. They are promising targets for studying intrabinary shocks, particle acceleration, and possible TeV gamma-ray emission. We performed a stacking analysis of spiders using LHAASO observations from 2021 to 2025, combining data from WCDA and KM2A. Targets were selected from SpiderCat and restricted to sources with reported gamma-ray fluxes. To reduce contamination from Galactic diffuse emission and source confusion, we excluded objects within Galactic latitude ∣b∣≤5 deg. This yielded a final sample of 39 targets. No significant cumulative signal was detected. The total stacked significance is below 2, indicating no evidence for collective TeV emission from the selected sample. We therefore derive an upper limit on the average differential energy flux at 1 TeV of 1.05×10^−14 /TeV/cm−2/s−1.
