Figure 5
From: An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA’s analysis method
Multiple-hit event rates in the unit of counts/keV/kg/day as a function of time.The top four panels present time-dependent events rates and the residual rates in the multiple-hit 1–6 keV regions with 15-day bin. Here, the event rates are averaged for the five crystals with weights from uncertainties in each 15 days bin size. Purple solid lines present background modeling with the single exponential (a) and with the yearly averaged DAMA-like method (b). Residual spectra for the single exponential model (c) and the DAMA-like model (d) are fitted with the sinusoidal function (red solid lines). The bottom four panels show the results for the 2-6 keV region using the same methods. In the multiple-hit events, no strong modulations from both methods are observed.
