SuperSNEC: Fast and Accurate Light-curve Production for Large Hydrodynamic Model Grids Using Adaptive Gridding

We present SuperSNEC, an accelerated version of the SuperNova Explosion Code (SNEC) designed for rapid production of large radiation-hydrodynamic model grids using low-zone-count simulations (∼100 zones). The main advance is adaptive gridding of the computational grid, which preserves light-curve fidelity relative to a high-resolution SNEC baseline (∼1000 zones) while delivering a runtime improvement of ∼420 × . SuperSNEC also includes solver optimizations, optimized radioactive-energy deposition and ray-tracing, and improved 56 Ni mixing controls. We quantify the speed-accuracy trade-off for a 100-zone configuration against a 1000-zone reference and define baseline settings for efficient large-grid inference of stripped-envelope supernovae. Our optimized 100-zone setup achieves an rms light-curve residual of 0.022 mag relative to the 1000-zone reference, at a runtime of < 2 s per model. Applied to SN 2011dh (Type IIb), SN 1993J (Type IIb), and SN 2020oi (Type Ic), SuperSNEC recovers light-curve parameters consistent with the literature. In particular, SN 2020oi is well reproduced by a model powered by 56 Ni decay and the standard hydrodynamic evolution, with no clear evidence that an additional power source such as interaction with circumstellar meterial or a central engine is required.