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  1. The third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astronomical station in Yunnan Province for an automatic time-domain survey and follow-up observations with an optimised observation and protection system. The telescope system of AST3-3 is similar to that of AST3-1 and AST3-2, except that it is equipped with a 14 K × 10 K QHY411 CMOS camera. AST3-3 has a field of view of 1.65∘×1.23∘ and is currently using the g band filter. During commissioning at Yaoan, AST3-3 aims to conduct an extragalactic transient survey, coupled with prompt follow-ups of opportunity targets. In this paper, we present the architecture of the AST3-3 automatic observation system. We demonstrate the data processing of observations by representatives SN 2022eyw and GRB 210420B. 
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  2. null (Ed.)
    The influence of pulse frequency (1−60 kHz) in a nanosecond filamentary discharge propagating along a flowing liquid water film was assessed with regards to the formation of chemical species with argon and helium carrier gasses. The production rate and energy yield for H₂O₂ and H₂ were measured for both carrier gases, and O₂ formation was determined for helium. The effect of pulse frequency on the energy dissipated per pulse as well as electron density was also investigated. The results indicate that the energy yield for H₂O₂ decreases with increasing pulse frequency while the energy yields of H₂ and O₂ remain relatively unaffected. It is proposed that the difference in the trends of the liquid versus the significantly longer residence time of the liquid phase allowing for more degradation of formed hydrogen peroxide before it is able exit the reactor. 
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