{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:CK33FO3VZWOBU7LXZDZ27YQOXS","short_pith_number":"pith:CK33FO3V","canonical_record":{"source":{"id":"1104.2427","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-13T09:32:19Z","cross_cats_sorted":[],"title_canon_sha256":"3fac1e2617d59ba2f15c48beb3429a1d2b3eb429062017809f03aa01dc868b86","abstract_canon_sha256":"015f210e9edb55d9d5ea861fca7114d92a9dfe333a0b3fd4441ab1ecc6ba2632"},"schema_version":"1.0"},"canonical_sha256":"12b7b2bb75cd9c1a7d77c8f3afe20ebc9b63a3c07716916054e8e41452847e5a","source":{"kind":"arxiv","id":"1104.2427","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.2427","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"arxiv_version","alias_value":"1104.2427v1","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2427","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"pith_short_12","alias_value":"CK33FO3VZWOB","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CK33FO3VZWOBU7LX","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CK33FO3V","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:CK33FO3VZWOBU7LXZDZ27YQOXS","target":"record","payload":{"canonical_record":{"source":{"id":"1104.2427","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-13T09:32:19Z","cross_cats_sorted":[],"title_canon_sha256":"3fac1e2617d59ba2f15c48beb3429a1d2b3eb429062017809f03aa01dc868b86","abstract_canon_sha256":"015f210e9edb55d9d5ea861fca7114d92a9dfe333a0b3fd4441ab1ecc6ba2632"},"schema_version":"1.0"},"canonical_sha256":"12b7b2bb75cd9c1a7d77c8f3afe20ebc9b63a3c07716916054e8e41452847e5a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:24:34.805644Z","signature_b64":"SobNQKJU0DujQxSpzL1lpMPFfkPmt9zejTDEdbUJNknIGhwa0SPHboiOxPkU1JWgZvLkq+RBSyw+LvIXrhqGDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12b7b2bb75cd9c1a7d77c8f3afe20ebc9b63a3c07716916054e8e41452847e5a","last_reissued_at":"2026-05-18T04:24:34.805257Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:24:34.805257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.2427","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":"2026-05-18T04:24:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KQtny7ZPLVyBsgJulLAuxOKM+fzLd2Pe11Jpn3S/6MMvggPMX9HB7hV7mjHDMCLRC7pubQ/PRkBQN24MQXDhCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:37:34.547185Z"},"content_sha256":"86db5ec3a43b1b4ee9137de26ec54e4c2e0f58c3c1ff38aa5d6bad2a9d672013","schema_version":"1.0","event_id":"sha256:86db5ec3a43b1b4ee9137de26ec54e4c2e0f58c3c1ff38aa5d6bad2a9d672013"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:CK33FO3VZWOBU7LXZDZ27YQOXS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic fields in nearby galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew Fletcher","submitted_at":"2011-04-13T09:32:19Z","abstract_excerpt":"Observations of synchrotron radiation and the Faraday rotation of its polarized component allow us to investigate the magnetic properties of the diffuse interstellar medium in nearby galaxies, on scales down to roughly one hundred parsecs. All disc galaxies seem to have a mean, or regular, magnetic field component that is ordered on length scales comparable to the size of the galaxy as well as a random magnetic field of comparable or greater strength. I present an overview of what is currently known observationally about galactic magnetic fields, focusing on the common features among galaxies "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2427","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":"2026-05-18T04:24:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0sp0ezdelvIv1iuIL6L6Pu4cBSokGCGv16TjTo6cj6QShsk4eGhw5FQW2ttSK3kkuh2M1JQOxaD568nGa/UABQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:37:34.547926Z"},"content_sha256":"ebb6ca1b31755784bed149c77f404e48e62ff61f114e495151758fccf91cb9ce","schema_version":"1.0","event_id":"sha256:ebb6ca1b31755784bed149c77f404e48e62ff61f114e495151758fccf91cb9ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/bundle.json","state_url":"https://pith.science/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/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":"2026-05-31T10:37:34Z","links":{"resolver":"https://pith.science/pith/CK33FO3VZWOBU7LXZDZ27YQOXS","bundle":"https://pith.science/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/bundle.json","state":"https://pith.science/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CK33FO3VZWOBU7LXZDZ27YQOXS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:CK33FO3VZWOBU7LXZDZ27YQOXS","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":"015f210e9edb55d9d5ea861fca7114d92a9dfe333a0b3fd4441ab1ecc6ba2632","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-13T09:32:19Z","title_canon_sha256":"3fac1e2617d59ba2f15c48beb3429a1d2b3eb429062017809f03aa01dc868b86"},"schema_version":"1.0","source":{"id":"1104.2427","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.2427","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"arxiv_version","alias_value":"1104.2427v1","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2427","created_at":"2026-05-18T04:24:34Z"},{"alias_kind":"pith_short_12","alias_value":"CK33FO3VZWOB","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CK33FO3VZWOBU7LX","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CK33FO3V","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:ebb6ca1b31755784bed149c77f404e48e62ff61f114e495151758fccf91cb9ce","target":"graph","created_at":"2026-05-18T04:24:34Z","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":"Observations of synchrotron radiation and the Faraday rotation of its polarized component allow us to investigate the magnetic properties of the diffuse interstellar medium in nearby galaxies, on scales down to roughly one hundred parsecs. All disc galaxies seem to have a mean, or regular, magnetic field component that is ordered on length scales comparable to the size of the galaxy as well as a random magnetic field of comparable or greater strength. I present an overview of what is currently known observationally about galactic magnetic fields, focusing on the common features among galaxies ","authors_text":"Andrew Fletcher","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-13T09:32:19Z","title":"Magnetic fields in nearby galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2427","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":"sha256:86db5ec3a43b1b4ee9137de26ec54e4c2e0f58c3c1ff38aa5d6bad2a9d672013","target":"record","created_at":"2026-05-18T04:24:34Z","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":"015f210e9edb55d9d5ea861fca7114d92a9dfe333a0b3fd4441ab1ecc6ba2632","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-04-13T09:32:19Z","title_canon_sha256":"3fac1e2617d59ba2f15c48beb3429a1d2b3eb429062017809f03aa01dc868b86"},"schema_version":"1.0","source":{"id":"1104.2427","kind":"arxiv","version":1}},"canonical_sha256":"12b7b2bb75cd9c1a7d77c8f3afe20ebc9b63a3c07716916054e8e41452847e5a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12b7b2bb75cd9c1a7d77c8f3afe20ebc9b63a3c07716916054e8e41452847e5a","first_computed_at":"2026-05-18T04:24:34.805257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:24:34.805257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SobNQKJU0DujQxSpzL1lpMPFfkPmt9zejTDEdbUJNknIGhwa0SPHboiOxPkU1JWgZvLkq+RBSyw+LvIXrhqGDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:24:34.805644Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.2427","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86db5ec3a43b1b4ee9137de26ec54e4c2e0f58c3c1ff38aa5d6bad2a9d672013","sha256:ebb6ca1b31755784bed149c77f404e48e62ff61f114e495151758fccf91cb9ce"],"state_sha256":"ad777686a4f50f66a67fe121b7b275a6d16eea79c858fab20dc2a01657ce9722"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sxWf4cvVM//7VSFb77Y+tbzWPocZf8pXURHaSlYzHZr+85DyNJVnd7qc23xu+M8752GprwvJLa+mAbPNdKjTBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:37:34.551344Z","bundle_sha256":"d595c266bcabfd64328fe675b11a947ac3657536e9b783dce027fb69c24a7da2"}}