{"paper":{"title":"Observations of Fast Radio Bursts at Frequencies down to 400 Megahertz","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Adam J. Gilbert, Alexander Josephy, Alexander S. Hill, Andre Renard, Arun Naidu, Bryan M. Gaensler, Charanjot Brar, Charles Moatti, Cherry Ng, CHIME/FRB Collaboration: Mandana Amiri, Chitrang Patel, C. H\\\"ofer, David Hanna, Davor Cubranic, Deborah C. Good, Dustin A. Lang, Emmanuel Fonseca, Gary Hinshaw, Ian Tretyakov, Ingrid H. Stairs, Jean F. Cliche, J. R. Shaw, Juan Mena-Parra, Keith Vanderlinde, Kendrick M. Smith, Kevin Bandura, Kiyoshi W. Masui, Laura B. Newburgh, Marcus Merryfield, Mark Halpern, Masoud Rafiei-Ravandi, Matthew Dobbs, Maya Burhanpurkar, Meiling Deng, M. Fandino, Michelle M. Boyce, Mohit Bhardwaj, Nikola Milutinovic, Nolan Denman, Patrick J. Boyle, Paula Boubel, Paul Scholz, Pragya Chawla, Prateek Yadav, Ryan Mckinven, Scott M. Ransom, Seth R. Siegel, Shriharsh P. Tendulkar, Thomas L. Landecker, Tristan Pinsonneault-Marotte, Ue-Li Pen, Utkarsh Giri, Victoria M. Kaspi, Ziggy Pleunis","submitted_at":"2019-01-14T19:19:15Z","abstract_excerpt":"Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio flashes likely arriving from far outside the Milky Way galaxy. This phenomenon was discovered at radio frequencies near 1.4 GHz and to date has been observed in one case at as high as 8 GHz, but not below 700 MHz in spite of significant searches at low frequencies. Here we report detections of FRBs at radio frequencies as low as 400 MHz, on the Canadian Hydrogen Intensity Mapping Experiment (CHIME) using the CHIME/FRB instrument. We present 13 FRBs detected during a telescope pre-commissioning phase, when our sensitivity "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.04524","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}