{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:G365HIU3BXNJCPN6NUUJWZ6Z54","short_pith_number":"pith:G365HIU3","canonical_record":{"source":{"id":"1206.6784","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-06-28T18:07:08Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"2adfc5a8046099c3c2de9142c7c47b9bbdacbabc844f4eda14f94997bad8f0b6","abstract_canon_sha256":"b2446385d7782355a523ae73808c21144180927a5d2f668437ed820035bed1e4"},"schema_version":"1.0"},"canonical_sha256":"36fdd3a29b0dda913dbe6d289b67d9ef3494915b9dc3141be525850f10f37b11","source":{"kind":"arxiv","id":"1206.6784","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6784","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6784v2","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6784","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"pith_short_12","alias_value":"G365HIU3BXNJ","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"G365HIU3BXNJCPN6","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"G365HIU3","created_at":"2026-05-18T12:27:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:G365HIU3BXNJCPN6NUUJWZ6Z54","target":"record","payload":{"canonical_record":{"source":{"id":"1206.6784","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-06-28T18:07:08Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"2adfc5a8046099c3c2de9142c7c47b9bbdacbabc844f4eda14f94997bad8f0b6","abstract_canon_sha256":"b2446385d7782355a523ae73808c21144180927a5d2f668437ed820035bed1e4"},"schema_version":"1.0"},"canonical_sha256":"36fdd3a29b0dda913dbe6d289b67d9ef3494915b9dc3141be525850f10f37b11","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:29:37.670914Z","signature_b64":"1F6bA98KmYEqoAKoRX5RUI5S2FIZV7T81TvQpqxsjGGkKDmwUZdIddKbsciekbFOw4J3uzxfZ0MLF6Z9HsvLDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36fdd3a29b0dda913dbe6d289b67d9ef3494915b9dc3141be525850f10f37b11","last_reissued_at":"2026-05-18T03:29:37.670413Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:29:37.670413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.6784","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":"2026-05-18T03:29:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zstoJsX0DyTA8zyeFxK7wLN6IA/+SEJEz6jzQO2qd7ufNK50aSNXIIRvDHDMvqflb+q3gUz3eDt/wz4kX+K6Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T02:06:13.595391Z"},"content_sha256":"e6d834d9245672bb53d5fde75afdb9df51619c8fd623d868286be31e6942aef3","schema_version":"1.0","event_id":"sha256:e6d834d9245672bb53d5fde75afdb9df51619c8fd623d868286be31e6942aef3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:G365HIU3BXNJCPN6NUUJWZ6Z54","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The supernova-regulated ISM. II. The mean magnetic field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. Fletcher, A. Shukurov, F. A. Gent, G. R. Sarson, M. J. Mantere","submitted_at":"2012-06-28T18:07:08Z","abstract_excerpt":"The origin and structure of the magnetic fields in the interstellar medium of spiral galaxies is investigated with 3D, non-ideal, compressible MHD simulations, including stratification in the galactic gravity field, differential rotation and radiative cooling. A rectangular domain, 1x1x2 kpc^{3} in size, spans both sides of the galactic mid-plane. Supernova explosions drive transonic turbulence. A seed magnetic field grows exponentially to reach a statistically steady state within 1.6 Gyr. Following Germano (1992) we use volume averaging with a Gaussian kernel to separate magnetic field into a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6784","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":"2026-05-18T03:29:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ncyrxdinJ4pMPV1WDkTXsyGNGgtH/cnzuH4I44L19Kx7eJTanyhGXMi4p55N8lxfsfzl+9UEAGneLsY0jKdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T02:06:13.595901Z"},"content_sha256":"8a844eff97914f00494d6214baddd91a73ee4e5a31d6d8ea90525d0e19e2a640","schema_version":"1.0","event_id":"sha256:8a844eff97914f00494d6214baddd91a73ee4e5a31d6d8ea90525d0e19e2a640"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/bundle.json","state_url":"https://pith.science/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/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":"2026-06-21T02:06:13Z","links":{"resolver":"https://pith.science/pith/G365HIU3BXNJCPN6NUUJWZ6Z54","bundle":"https://pith.science/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/bundle.json","state":"https://pith.science/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G365HIU3BXNJCPN6NUUJWZ6Z54/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:G365HIU3BXNJCPN6NUUJWZ6Z54","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":"b2446385d7782355a523ae73808c21144180927a5d2f668437ed820035bed1e4","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-06-28T18:07:08Z","title_canon_sha256":"2adfc5a8046099c3c2de9142c7c47b9bbdacbabc844f4eda14f94997bad8f0b6"},"schema_version":"1.0","source":{"id":"1206.6784","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6784","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6784v2","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6784","created_at":"2026-05-18T03:29:37Z"},{"alias_kind":"pith_short_12","alias_value":"G365HIU3BXNJ","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"G365HIU3BXNJCPN6","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"G365HIU3","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:8a844eff97914f00494d6214baddd91a73ee4e5a31d6d8ea90525d0e19e2a640","target":"graph","created_at":"2026-05-18T03:29:37Z","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 origin and structure of the magnetic fields in the interstellar medium of spiral galaxies is investigated with 3D, non-ideal, compressible MHD simulations, including stratification in the galactic gravity field, differential rotation and radiative cooling. A rectangular domain, 1x1x2 kpc^{3} in size, spans both sides of the galactic mid-plane. Supernova explosions drive transonic turbulence. A seed magnetic field grows exponentially to reach a statistically steady state within 1.6 Gyr. Following Germano (1992) we use volume averaging with a Gaussian kernel to separate magnetic field into a","authors_text":"A. Fletcher, A. Shukurov, F. A. Gent, G. R. Sarson, M. J. Mantere","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-06-28T18:07:08Z","title":"The supernova-regulated ISM. II. The mean magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6784","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:e6d834d9245672bb53d5fde75afdb9df51619c8fd623d868286be31e6942aef3","target":"record","created_at":"2026-05-18T03:29:37Z","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":"b2446385d7782355a523ae73808c21144180927a5d2f668437ed820035bed1e4","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-06-28T18:07:08Z","title_canon_sha256":"2adfc5a8046099c3c2de9142c7c47b9bbdacbabc844f4eda14f94997bad8f0b6"},"schema_version":"1.0","source":{"id":"1206.6784","kind":"arxiv","version":2}},"canonical_sha256":"36fdd3a29b0dda913dbe6d289b67d9ef3494915b9dc3141be525850f10f37b11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36fdd3a29b0dda913dbe6d289b67d9ef3494915b9dc3141be525850f10f37b11","first_computed_at":"2026-05-18T03:29:37.670413Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:29:37.670413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1F6bA98KmYEqoAKoRX5RUI5S2FIZV7T81TvQpqxsjGGkKDmwUZdIddKbsciekbFOw4J3uzxfZ0MLF6Z9HsvLDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:29:37.670914Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.6784","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6d834d9245672bb53d5fde75afdb9df51619c8fd623d868286be31e6942aef3","sha256:8a844eff97914f00494d6214baddd91a73ee4e5a31d6d8ea90525d0e19e2a640"],"state_sha256":"7fba45b20b334c86bd7b004cd8b66a5a52d1a37e0d74da754a2c39206726e13d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3D5eSDErITuebxchQAdIYmplGcHdrB0pQ5JgKRh34tU4tCRa7LR1P3TyahsmISsag1C0g6/ZT/35n1gdYg2VAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T02:06:13.597851Z","bundle_sha256":"1e7c43b66d022f255afa82b597c1b53b02fd934401a2cc18983a1b05ba3dd5b8"}}