Christopher Walter

Preprint · January 17, 2026 Supernovae are observed to occur approximately 1-2 times per century in a galaxy like the Milky Way. Based on historical records, however, the last core-collapse galactic supernova observed by humans occurred almost 1,000 years ago. Luckily, we are well po ... Link to item Cite

Measurement of the solar neutrino interaction rate below 3.49 MeV in Super-Kamiokande-IV

Preprint · December 22, 2025 Super-Kamiokande (SK) has observed $^{8}\text{B}$ solar neutrino elastic scattering at recoil electron kinetic energies ($E_{\text{kin}}$) as low as 3.49 MeV to study neutrino flavor conversion within the Sun. At SK-observable energies, these conversions a ... Link to item Cite

First Associated Neutrino Search for a Failed Supernova Candidate with Super-Kamiokande

Preprint · November 5, 2025 Link to item Cite

Search for Diffuse Supernova Neutrino Background with 956.2 days of Super-Kamiokande Gadolinium Dataset

Preprint · November 3, 2025 We report the search result for the Diffuse Supernova Neutrino Background (DSNB) in neutrino energies beyond 9.3~MeV in the gadolinium-loaded Super-Kamiokande (SK) detector with $22,500\times956.2$$~\rm m^3\cdot day$ exposure. %$22.5{\rm k}\times956.2$$~\r ... Link to item Cite

Search for nucleon decay via $p\rightarrowνπ^{+}$ and $n\rightarrowνπ^{0}$ in 0.484 Mton-year of Super-Kamiokande data

Preprint · October 30, 2025 Link to item Cite

Photometric Redshift Estimation for Rubin Observatory Data Preview 1 with Redshift Assessment Infrastructure Layers (RAIL)

Preprint · October 8, 2025 We present the first systematic analysis of photometric redshifts (photo-z) estimated from the Rubin Observatory Data Preview 1 (DP1) data taken with the Legacy Survey of Space and Time (LSST) Commissioning Camera. Employing the Redshift Assessment Infrast ... Link to item Cite

Measurement of the branching ratio of $\mathrm{^{16}N}$, $\mathrm{^{15}C}$, $\mathrm{^{12}B}$, and $\mathrm{^{13}B}$ isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector

Preprint · August 25, 2025 Link to item Cite

Search for proton decay via $p\rightarrow{e^+η}$ and $p\rightarrow{μ^+η}$ with a 0.37 Mton-year exposure of Super-Kamiokande

Preprint · September 29, 2024 Link to item Cite

Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment

Preprint · November 7, 2023 Link to item Cite

Simulating image coaddition with the Nancy Grace Roman Space Telescope: II. Analysis of the simulated images and implications for weak lensing

Preprint · March 15, 2023 Link to item Cite