{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:6WYCVS3TKBXBPTKUGTFHMRCJIA","short_pith_number":"pith:6WYCVS3T","canonical_record":{"source":{"id":"1501.07535","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-19T21:26:05Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"5bc7837599b481400f0c7dfb6693e20d96589ed7e465e3dbab358b9e5b727604","abstract_canon_sha256":"839cb88dc3d3b46a7e1d5d8f183bfaf9afe9f5b2d9dccf0aea4656777ee27e12"},"schema_version":"1.0"},"canonical_sha256":"f5b02acb73506e17cd5434ca7644494011604a57ee453ad331109e04694eb019","source":{"kind":"arxiv","id":"1501.07535","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07535","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07535v1","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07535","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"pith_short_12","alias_value":"6WYCVS3TKBXB","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6WYCVS3TKBXBPTKU","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6WYCVS3T","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:6WYCVS3TKBXBPTKUGTFHMRCJIA","target":"record","payload":{"canonical_record":{"source":{"id":"1501.07535","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-19T21:26:05Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"5bc7837599b481400f0c7dfb6693e20d96589ed7e465e3dbab358b9e5b727604","abstract_canon_sha256":"839cb88dc3d3b46a7e1d5d8f183bfaf9afe9f5b2d9dccf0aea4656777ee27e12"},"schema_version":"1.0"},"canonical_sha256":"f5b02acb73506e17cd5434ca7644494011604a57ee453ad331109e04694eb019","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:21.693275Z","signature_b64":"RKDW/Xr8vcUdo/X42uxAAUrxev5bub9jsdmhcTj6Qp+ZADrSnsa0mPI/iErzacI/zVZDIgXAXws9XoJQbSiSCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f5b02acb73506e17cd5434ca7644494011604a57ee453ad331109e04694eb019","last_reissued_at":"2026-05-18T02:28:21.692710Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:21.692710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.07535","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:28:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aoUbh/2JsMS2+vAQqYvFCi4W1S/owxthzrdZ5FXQOsmfcHOKo40zFvNiaH2KmSF8UHMOyCDmPhxW/vlOPNZZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:58:14.084476Z"},"content_sha256":"6af51c59d677da0337749e95203abadff9d26e3c753d63f5e33aa4c1c46b8419","schema_version":"1.0","event_id":"sha256:6af51c59d677da0337749e95203abadff9d26e3c753d63f5e33aa4c1c46b8419"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:6WYCVS3TKBXBPTKUGTFHMRCJIA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fast Transients at Cosmological Distances with the SKA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"A. Deller, B. Stappers, C. Law, C. Trott, D. Lorimer, E. Keane, E.O. Ofek, J. Hessels, J.-P. Macquart, K. Grainge, L. Spitler, M. McQuinn, M. Pietka, R. Bhat, R. Breton, R.P. Fender, S. Chatterjee","submitted_at":"2015-01-19T21:26:05Z","abstract_excerpt":"Impulsive radio bursts that are detectable across cosmological distances constitute extremely powerful probes of the ionized Inter-Galactic Medium (IGM), intergalactic magnetic fields, and the properties of space-time itself. Their dispersion measures (DMs) will enable us to detect the \"missing\" baryons in the low-redshift Universe and make the first measurements of the mean galaxy halo profile, a key parameter in models of galaxy formation and feedback. Impulsive bursts can be used as cosmic rulers at redshifts exceeding 2, and constrain the dark energy equation-of-state parameter, $w(z)$ at "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07535","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:28:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CkoMDD2oFNpE4NehsGh6UF0OvS+V4sVINY3Q4zXkSjR8QORamJDF9pT8fUM0GlsxF4HfKJ2nX3fHXxgudvuSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:58:14.085091Z"},"content_sha256":"6d6ce66956defb4a0d65437a6d67b23db458e7bd8e813615025f421b1516fcd2","schema_version":"1.0","event_id":"sha256:6d6ce66956defb4a0d65437a6d67b23db458e7bd8e813615025f421b1516fcd2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/bundle.json","state_url":"https://pith.science/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/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":"2026-05-27T17:58:14Z","links":{"resolver":"https://pith.science/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA","bundle":"https://pith.science/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/bundle.json","state":"https://pith.science/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6WYCVS3TKBXBPTKUGTFHMRCJIA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6WYCVS3TKBXBPTKUGTFHMRCJIA","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":"839cb88dc3d3b46a7e1d5d8f183bfaf9afe9f5b2d9dccf0aea4656777ee27e12","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-19T21:26:05Z","title_canon_sha256":"5bc7837599b481400f0c7dfb6693e20d96589ed7e465e3dbab358b9e5b727604"},"schema_version":"1.0","source":{"id":"1501.07535","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.07535","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"arxiv_version","alias_value":"1501.07535v1","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.07535","created_at":"2026-05-18T02:28:21Z"},{"alias_kind":"pith_short_12","alias_value":"6WYCVS3TKBXB","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6WYCVS3TKBXBPTKU","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6WYCVS3T","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:6d6ce66956defb4a0d65437a6d67b23db458e7bd8e813615025f421b1516fcd2","target":"graph","created_at":"2026-05-18T02:28:21Z","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":"Impulsive radio bursts that are detectable across cosmological distances constitute extremely powerful probes of the ionized Inter-Galactic Medium (IGM), intergalactic magnetic fields, and the properties of space-time itself. Their dispersion measures (DMs) will enable us to detect the \"missing\" baryons in the low-redshift Universe and make the first measurements of the mean galaxy halo profile, a key parameter in models of galaxy formation and feedback. Impulsive bursts can be used as cosmic rulers at redshifts exceeding 2, and constrain the dark energy equation-of-state parameter, $w(z)$ at ","authors_text":"A. Deller, B. Stappers, C. Law, C. Trott, D. Lorimer, E. Keane, E.O. Ofek, J. Hessels, J.-P. Macquart, K. Grainge, L. Spitler, M. McQuinn, M. Pietka, R. Bhat, R. Breton, R.P. Fender, S. Chatterjee","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-19T21:26:05Z","title":"Fast Transients at Cosmological Distances with the SKA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.07535","kind":"arxiv","version":1},"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":"sha256:6af51c59d677da0337749e95203abadff9d26e3c753d63f5e33aa4c1c46b8419","target":"record","created_at":"2026-05-18T02:28:21Z","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":"839cb88dc3d3b46a7e1d5d8f183bfaf9afe9f5b2d9dccf0aea4656777ee27e12","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-01-19T21:26:05Z","title_canon_sha256":"5bc7837599b481400f0c7dfb6693e20d96589ed7e465e3dbab358b9e5b727604"},"schema_version":"1.0","source":{"id":"1501.07535","kind":"arxiv","version":1}},"canonical_sha256":"f5b02acb73506e17cd5434ca7644494011604a57ee453ad331109e04694eb019","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f5b02acb73506e17cd5434ca7644494011604a57ee453ad331109e04694eb019","first_computed_at":"2026-05-18T02:28:21.692710Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:21.692710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RKDW/Xr8vcUdo/X42uxAAUrxev5bub9jsdmhcTj6Qp+ZADrSnsa0mPI/iErzacI/zVZDIgXAXws9XoJQbSiSCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:21.693275Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.07535","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6af51c59d677da0337749e95203abadff9d26e3c753d63f5e33aa4c1c46b8419","sha256:6d6ce66956defb4a0d65437a6d67b23db458e7bd8e813615025f421b1516fcd2"],"state_sha256":"58c654d92f7d7080087112f34e4eaedf516ab7db2fa80dc105ac977bb8534ddb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZT+EOJW7NUOzhxtegUz485WTDoxuGO5i16QS5Y0WUl4n0xHV8+NMqcNgx2zgPWapjSaAZFT6nlkGznfYXxAWAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:58:14.088367Z","bundle_sha256":"10f43c7b8e16ac13649391e38192f6f85d8451ee19668cf9ca837b41f454222a"}}