2-D Visualization of Time Dependence in Cosmic Ray Anisotropy using IceCube

Over the last 11 years, the IceCube Neutrino Observatory has recorded over 694 billion cosmic-ray events. We observe an anisotropy in the arrival direction distribution of these cosmic rays that, at least qualitatively, appears to be constant over time. However, detailed quantitative comparison is required to properly search for time-variation in the signal. With the immense statistics across a substantial length of time, there is a need for visual graphics that allow straightforward interpretation of the data. In this study, we consider both 1- and 2-D visualizations of relative intensity over time. One-dimensional projections along right ascension are well-established within IceCube, but potentially lose valuable information. By instead comparing each year's skymap to a baseline, we can calculate the p-value for each pixel and display them two-dimensionally. This process pinpoints any excesses or deficits in relative intensity across time to specific parts of the sky. We present preliminary results on this study, including potential indicators of time-variation within the signal.