Tootfinder

Reduced and mixed precision turbulent flow simulations using explicit finite difference schemes
B\'alint Sikl\'osi, Pushpender K. Sharma, David J. Lusher, Istv\'an Z. Reguly, Neil D. Sandham
https://arxiv.org/abs/2505.20911

Reduced and mixed precision turbulent flow simulations using explicit finite difference schemes
The use of reduced and mixed precision computing has gained increasing attention in high-performance computing (HPC) as a means to improve computational efficiency, particularly on modern hardware architectures like GPUs. In this work, we explore the application of mixed precision arithmetic in compressible turbulent flow simulations using explicit finite difference schemes. We extend the OPS and OpenSBLI frameworks to support customizable precision levels, enabling fine-grained control over pr…

Discovery and Localization of the Swift-Observed FRB 20241228A in a Star-forming Host Galaxy
Alice P. Curtin, Shion Andrew, Sunil Simha, Alice Cai, Kenzie Nimmo, Shami Chatterjee, Amanda M. Cook, Fengqiu Adam Dong, Yuxin Dong, Tarraneh Eftekhari, Wen-fai Fong, Emmanuel Fonseca, Jason W. T. Hessels, Ronniy C. Joseph, Victoria Kaspi, Calvin Leung, Robert Main, Kiyoshi W. Masui, Ryan Mckinven, Daniele Michilli, Mason Ng, Ayush Pandhi, Aaron B. Pearlman, Ziggy Pleunis, Mawson W. Sammons, K…

Discovery and Localization of the Swift-Observed FRB 20241228A in a Star-forming Host Galaxy
On 2024 December 28, CHIME/FRB detected the thus-far non-repeating FRB 20241228A with a real-time signal-to-noise ratio of $>50$. Approximately 112~s later, the X-ray Telescope onboard the Neil Gehrels Swift Observatory was on source, the fastest follow-up to-date of a non-repeating FRB (Tohuvavohu et al. in prep.). Using CHIME/FRB and two of the three CHIME/FRB Outriggers, we obtained a Very Long Baseline Interferometry localization for FRB 20241228A with a 1$σ$ confidence ellipse of 11$^{\pr…

A large, chemically enriched, neutral gas reservoir in a galaxy at z = 6.782
A. Saccardi, S. D. Vergani, L. Izzo, V. D'Elia, K. E. Heintz, A. De Cia, D. B. Malesani, J. T. Palmerio, P. Petitjean, S. Savaglio, N. R. Tanvir, R. Salvaterra, R. Brivio, S. Campana, L. Christensen, S. Covino, J. P. U. Fynbo, D. H. Hartmann, C. Konstantopoulou, A. J. Levan, A. Martin-Carrillo, A. Melandri, L. Piro, G. Pugliese, P. Schady, B. Schneider

A large, chemically enriched, neutral gas reservoir in a galaxy at z = 6.782
The chemical characterization of galaxies in the first billion years after the Big Bang is one of the central goals of current astrophysics. Optical/near-infrared spectroscopy of long gamma-ray bursts (GRBs) have been heralded as an effective diagnostic to probe the interstellar medium of their host galaxies and their metal and dust content, up to the highest redshift. An opportunity to fulfill this expectation was provided by the recent blast triggered by the Neil Gehrels Swift Observatory of …

The 157-month Swift-BAT All-Sky Hard X-Ray Survey
Amy Y. Lien, Hans Krimm, Craig Markwardt, Kyuseok Oh, Lea Marcotulli, Richard Mushotzky, Nicholas R. Collins, Scott Barthelmy, Wayne H. Baumgartner, S. Bradley Cenko, Michael Koss, Sibasish Laha, Takanori Sakamoto, David Palmer, Tyler Parsotan
https://arxiv.org/abs/2506.04109

The 157-month Swift-BAT All-Sky Hard X-Ray Survey
The Burst Alert Telescope (BAT) onboard the Neil Gehrels Swift observatory has been serving as a survey instrument for the hard X-ray sky, and has detected thousands of X-ray sources (e.g., AGNs, X-ray binaries, etc). BAT monitors these X-ray sources and follows their light curves on time scales from minutes to years. In addition, BAT discovers hundreds of new X-ray sources in survey images stacked throughout the mission lifetime. We present the updated BAT survey catalog since the last publish…