NEW(W) 一个锁定于轨道绕行轴的半年共模调制:DAMPE(暗物质粒子探测卫星)伽马射线事例率(A Semi-Annual Common-Mode Modulation Locked to the Orbital-Revolution Axis in DAMPE Gamma-Ray Event Rates)
Year: 2026
Type: preprint
Abstract: 我们报告在 DAMPE 伽马射线光子数据集中发现的一个半年尺度共模调制。统一口径下(2016 至 2024,能量不低于 5 GeV,154770 个事例),曝光归一后的残余共模幅度为主口径 6.92%;换用三套不含观测信息的天空权重后落在 3.79% 至 9.94%,故以区间报告并注明口径。相位以年际相位弥散为判据,换到轨道绕行轴(367.4 天)后由 40 度降至 26 度;并明确说明日历轴下傅里叶峰必在 365 天附近,不构成反证。其向呈两分量近反相结构:低纬随能量旋转,高纬恒在约 203 至 205 度。结果经十余项检验不消失,对模板分辨率不敏感(平滑到 16 度仅沉 5.7%);误差系统主导,不作显著性宣判。本工作不主张具体机制,只报告一个可独立复核的候选观测效应,并附可复现协议。 关键词:DAMPE;暗物质粒子探测卫星;伽马射线;事例率调制;曝光归一;半年振荡;系统误差;可复现性;PGI蛟龙;华夏思哲偏元注;陈偏贞;老陈与AI的深夜实验室 本记录含六件:① 中文主文(8 页);② 英文主文(8 页);③ 补充材料 S1–S10(8 页:含 14 项检验逐项表、天空权重定义式、分辨率阶梯、两分量表、误差预算、自我更正记录、复现映射表);④ 代码包(12 个脚本+运行说明,含路径与数据获取提示);⑤ 表格数据(6 张 CSV);⑥ 图件(3 张 PNG)。事件级中间数据不随附,可由代码包在公开数据上重建。 ——老陈与AI的深夜实验室 发布 请笑纳—— We report a semi-annual common-mode modulation in the gamma-ray photon dataset of DAMPE. Under a unified selection (2016-2024, E >= 5 GeV, 154,770 events), the residual common-mode amplitude is 6.92% for the baseline sky weight and spans 3.79% to 9.94% across three observation-independent sky weights; we therefore report an interval together with the weight used. Using year-to-year phase dispersion as the discriminator, the dispersion drops from 40 to 26 degrees on the orbital revolution axis (367.4 days); we state explicitly that a Fourier peak near 365 days on a calendar axis is not counter-evidence. The direction shows a two-component near-anti-phase structure (low latitude rotating with energy; high latitude fixed at about 203-205 degrees). More than ten systematic checks do not remove the modulation, and it is insensitive to template resolution (a 5.7% drop when smoothed to 16 degrees). Systematics dominate the error budget, so no significance claim is made. No physical mechanism is advocated; we report a checkable candidate effect with a reproducible protocol. Keywords: DAMPE; gamma rays; event-rate modulation; exposure normalisation; semi-annual oscillation; systematic uncertainties; reproducibility; PGI Jiaolong; Huaxia Sizhe Pianyuan Zhu; Chen Pianzhen; Chensong_AI_LateNightLab This record contains six files: Chinese main text (8 pp.), English main text (8 pp.), Supplementary Material S1–S10 (8 pp.), code package (12 scripts + README), tabular data (6 CSVs), and figures (3 PNGs). Event-level intermediate products are not redistributed; they are regenerable with the code package from the public data. — Published by Lao Chen & AI's Late Night Lab. Please accept with a smile.
Author: Chen, Song
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222847151