{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:6KXACGMCZ626QBOTS7J6EBKKXM","short_pith_number":"pith:6KXACGMC","canonical_record":{"source":{"id":"1701.03209","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-01-12T02:03:54Z","cross_cats_sorted":[],"title_canon_sha256":"48febb1882aea4092996b85f654771b1ef397cea0b4dfbead45495f7bc42ef9c","abstract_canon_sha256":"07b339726628ce932f9649f3c5b1a0ca1cfd0c005aa3dd0a5931cfdf5b504220"},"schema_version":"1.0"},"canonical_sha256":"f2ae011982cfb5e805d397d3e2054abb0035e770848fdb50622d87fdf04ce8fb","source":{"kind":"arxiv","id":"1701.03209","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.03209","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"arxiv_version","alias_value":"1701.03209v2","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.03209","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"pith_short_12","alias_value":"6KXACGMCZ626","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6KXACGMCZ626QBOT","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6KXACGMC","created_at":"2026-05-18T12:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:6KXACGMCZ626QBOTS7J6EBKKXM","target":"record","payload":{"canonical_record":{"source":{"id":"1701.03209","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-01-12T02:03:54Z","cross_cats_sorted":[],"title_canon_sha256":"48febb1882aea4092996b85f654771b1ef397cea0b4dfbead45495f7bc42ef9c","abstract_canon_sha256":"07b339726628ce932f9649f3c5b1a0ca1cfd0c005aa3dd0a5931cfdf5b504220"},"schema_version":"1.0"},"canonical_sha256":"f2ae011982cfb5e805d397d3e2054abb0035e770848fdb50622d87fdf04ce8fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:40.021398Z","signature_b64":"oropFE/YzMC2ArlILGEmLqy5nnmQ9Mpx7baHaVsT8J+elxDJUI0ScRIBTzk9NZt7Gr6PsIxnmcSPlTK37z6sAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2ae011982cfb5e805d397d3e2054abb0035e770848fdb50622d87fdf04ce8fb","last_reissued_at":"2026-05-18T00:20:40.020640Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:40.020640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.03209","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qM+asBdC/aCpUa9akmGeHqiwT0PhyGHcMb7coLLcjKaJ0oJbBPeYR0t4WVA5W5BeurawW09sZWwsMxPgjumpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T18:57:29.533118Z"},"content_sha256":"78e0df10630f97204f5bb720a381f114bc13d68bfe0eedf64803266266ea8579","schema_version":"1.0","event_id":"sha256:78e0df10630f97204f5bb720a381f114bc13d68bfe0eedf64803266266ea8579"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:6KXACGMCZ626QBOTS7J6EBKKXM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Hydrogen Epoch of Reionization Array Dish III: Measuring Chromaticity of Prototype Element with Reflectometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Aaron Ewall-Wice, Aaron R. Parsons, Abraham R. Neben, Adam P. Beardsley, Adrian Liu, Andrei Mesinger, Angelo Syce, Anita Loots, Anna Lebedeva, Austin Julius, Bradley Greig, Brian Glendenning, Bryna J. Hazelton, Carina Cheng, Cherie K. Day, Chris L. Carilli, Craig Smith, Cresshim Malgas, Daniel C. Jacobs, David MacMahon, David R. DeBoer, Eloy de Lera Acedo, Eunice Matsetela, Gcobisa Fadana, Gilbert Hsyu, Haoxuan Zheng, Jacqueline N. Hewitt, James E. Aguirre, James Robnett, Jasper Grobbelaar, Jonathan C. Pober, Jon Ringuette, Joshua S. Dillon, Judd D. Bowman, Kathryn Rosie, Lourence Malan, MacCalvin Kariseb, Matthys Maree, Max Tegmark, Miguel F. Morales, Nathan Mathison, Nicolas Fagnoni, Nima Razavi-Ghods, Nipanjana Patra, Nithyanandan Thyagarajan, Paul Alexander, Peter K. G. Williams, Raddwine Sell, Randall Fritz, Richard F. Bradley, Samantha Pieterse, Saul A. Kohn, Steve R. Furlanetto, Telalo Lekalake, Tsz Kuk Leung, Zachary Martinot, Zaki S. Ali","submitted_at":"2017-01-12T02:03:54Z","abstract_excerpt":"The experimental efforts to detect the redshifted 21 cm signal from the Epoch of Reionization (EoR) are limited predominantly by the chromatic instrumental systematic effect. The delay spectrum methodology for 21 cm power spectrum measurements brought new attention to the critical impact of an antenna's chromaticity on the viability of making this measurement. This methodology established a straightforward relationship between time-domain response of an instrument and the power spectrum modes accessible to a 21 cm EoR experiment. We examine the performance of a prototype of the Hydrogen Epoch "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.03209","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yqygVCMI8cSwrIs78sgiwXleMieRPTO7Xm+ACJii1b10xCo3izvRURgE2Wszq4koZNd+oaUFItpZnMLDNg2cBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T18:57:29.533523Z"},"content_sha256":"7a01d8af20b0857580ba63f9bda88ffea9d77a1b974ac0309479d264df4155d3","schema_version":"1.0","event_id":"sha256:7a01d8af20b0857580ba63f9bda88ffea9d77a1b974ac0309479d264df4155d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6KXACGMCZ626QBOTS7J6EBKKXM/bundle.json","state_url":"https://pith.science/pith/6KXACGMCZ626QBOTS7J6EBKKXM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6KXACGMCZ626QBOTS7J6EBKKXM/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-19T18:57:29Z","links":{"resolver":"https://pith.science/pith/6KXACGMCZ626QBOTS7J6EBKKXM","bundle":"https://pith.science/pith/6KXACGMCZ626QBOTS7J6EBKKXM/bundle.json","state":"https://pith.science/pith/6KXACGMCZ626QBOTS7J6EBKKXM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6KXACGMCZ626QBOTS7J6EBKKXM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6KXACGMCZ626QBOTS7J6EBKKXM","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"07b339726628ce932f9649f3c5b1a0ca1cfd0c005aa3dd0a5931cfdf5b504220","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-01-12T02:03:54Z","title_canon_sha256":"48febb1882aea4092996b85f654771b1ef397cea0b4dfbead45495f7bc42ef9c"},"schema_version":"1.0","source":{"id":"1701.03209","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.03209","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"arxiv_version","alias_value":"1701.03209v2","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.03209","created_at":"2026-05-18T00:20:40Z"},{"alias_kind":"pith_short_12","alias_value":"6KXACGMCZ626","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6KXACGMCZ626QBOT","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6KXACGMC","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:7a01d8af20b0857580ba63f9bda88ffea9d77a1b974ac0309479d264df4155d3","target":"graph","created_at":"2026-05-18T00:20:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The experimental efforts to detect the redshifted 21 cm signal from the Epoch of Reionization (EoR) are limited predominantly by the chromatic instrumental systematic effect. The delay spectrum methodology for 21 cm power spectrum measurements brought new attention to the critical impact of an antenna's chromaticity on the viability of making this measurement. This methodology established a straightforward relationship between time-domain response of an instrument and the power spectrum modes accessible to a 21 cm EoR experiment. We examine the performance of a prototype of the Hydrogen Epoch ","authors_text":"Aaron Ewall-Wice, Aaron R. Parsons, Abraham R. Neben, Adam P. Beardsley, Adrian Liu, Andrei Mesinger, Angelo Syce, Anita Loots, Anna Lebedeva, Austin Julius, Bradley Greig, Brian Glendenning, Bryna J. Hazelton, Carina Cheng, Cherie K. Day, Chris L. Carilli, Craig Smith, Cresshim Malgas, Daniel C. Jacobs, David MacMahon, David R. DeBoer, Eloy de Lera Acedo, Eunice Matsetela, Gcobisa Fadana, Gilbert Hsyu, Haoxuan Zheng, Jacqueline N. Hewitt, James E. Aguirre, James Robnett, Jasper Grobbelaar, Jonathan C. Pober, Jon Ringuette, Joshua S. Dillon, Judd D. Bowman, Kathryn Rosie, Lourence Malan, MacCalvin Kariseb, Matthys Maree, Max Tegmark, Miguel F. Morales, Nathan Mathison, Nicolas Fagnoni, Nima Razavi-Ghods, Nipanjana Patra, Nithyanandan Thyagarajan, Paul Alexander, Peter K. G. Williams, Raddwine Sell, Randall Fritz, Richard F. Bradley, Samantha Pieterse, Saul A. Kohn, Steve R. Furlanetto, Telalo Lekalake, Tsz Kuk Leung, Zachary Martinot, Zaki S. Ali","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-01-12T02:03:54Z","title":"The Hydrogen Epoch of Reionization Array Dish III: Measuring Chromaticity of Prototype Element with Reflectometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.03209","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:78e0df10630f97204f5bb720a381f114bc13d68bfe0eedf64803266266ea8579","target":"record","created_at":"2026-05-18T00:20:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"07b339726628ce932f9649f3c5b1a0ca1cfd0c005aa3dd0a5931cfdf5b504220","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-01-12T02:03:54Z","title_canon_sha256":"48febb1882aea4092996b85f654771b1ef397cea0b4dfbead45495f7bc42ef9c"},"schema_version":"1.0","source":{"id":"1701.03209","kind":"arxiv","version":2}},"canonical_sha256":"f2ae011982cfb5e805d397d3e2054abb0035e770848fdb50622d87fdf04ce8fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2ae011982cfb5e805d397d3e2054abb0035e770848fdb50622d87fdf04ce8fb","first_computed_at":"2026-05-18T00:20:40.020640Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:40.020640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oropFE/YzMC2ArlILGEmLqy5nnmQ9Mpx7baHaVsT8J+elxDJUI0ScRIBTzk9NZt7Gr6PsIxnmcSPlTK37z6sAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:40.021398Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.03209","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:78e0df10630f97204f5bb720a381f114bc13d68bfe0eedf64803266266ea8579","sha256:7a01d8af20b0857580ba63f9bda88ffea9d77a1b974ac0309479d264df4155d3"],"state_sha256":"ef305d49eddb029686abfcc5b27898f5ba1a21877c08bd4da5a50bc0d7e966b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ll2OWsvqMJdeV6fifNT4qy7mOhL+SOxFNYteBSS9RUeoIu6t00CwLKybRKmBbFNdCObEoSi40NlmcLfiozjwAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T18:57:29.536030Z","bundle_sha256":"51b92bdd2e58eba37ce4a582aa7961efeca209ab747c67ff67cc1239cdbee965"}}