{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HZSNH2JFX4BB26Q7K4IJOYS2SZ","short_pith_number":"pith:HZSNH2JF","canonical_record":{"source":{"id":"1304.1078","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-03T19:58:43Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"8d2527fa2279bbf08b2386e016e781f74f2f8d90bb17fcce47c4a1acf49ee4a2","abstract_canon_sha256":"6b5fa2c3f9f3f76ce91063446d9f3a7ce1266996e19d83208afed44a15ab469c"},"schema_version":"1.0"},"canonical_sha256":"3e64d3e925bf021d7a1f571097625a96751149b3d4c095e417bce00e74d4aa46","source":{"kind":"arxiv","id":"1304.1078","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.1078","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"1304.1078v2","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.1078","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"HZSNH2JFX4BB","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HZSNH2JFX4BB26Q7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HZSNH2JF","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HZSNH2JFX4BB26Q7K4IJOYS2SZ","target":"record","payload":{"canonical_record":{"source":{"id":"1304.1078","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-03T19:58:43Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"8d2527fa2279bbf08b2386e016e781f74f2f8d90bb17fcce47c4a1acf49ee4a2","abstract_canon_sha256":"6b5fa2c3f9f3f76ce91063446d9f3a7ce1266996e19d83208afed44a15ab469c"},"schema_version":"1.0"},"canonical_sha256":"3e64d3e925bf021d7a1f571097625a96751149b3d4c095e417bce00e74d4aa46","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:58.889797Z","signature_b64":"1t/ExWVJVsn7DVhUI+gEOKveNHYbqxrEPhzKbG6KiuKZ3FkGgmHP1ZQ+pv7fRS4J9JvUb9BYZ8UAIEs2WjEDCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e64d3e925bf021d7a1f571097625a96751149b3d4c095e417bce00e74d4aa46","last_reissued_at":"2026-05-18T03:19:58.889071Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:58.889071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.1078","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":"2026-05-18T03:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1TqOTCzWSgfRBDIrnmfCipuFma4HKb5xeJp2X24rz7p+qGi83rjTDZMUG3qScLsi6c3vjtEeiNyMGITwAuDAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:35:29.773493Z"},"content_sha256":"916495b7d6bdba788666f124eb5b7d31e3dd19e2ea88d4ff70151c26806e5229","schema_version":"1.0","event_id":"sha256:916495b7d6bdba788666f124eb5b7d31e3dd19e2ea88d4ff70151c26806e5229"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HZSNH2JFX4BB26Q7K4IJOYS2SZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Loops and spurs: The angular power spectrum of the Galactic synchrotron background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Copenhagen), Philipp Mertsch (Stanford), Subir Sarkar (Oxford","submitted_at":"2013-04-03T19:58:43Z","abstract_excerpt":"We present a new model of the diffuse Galactic synchrotron radiation, concentrating on its angular anisotropies. While previous studies have focussed on either the variation of the emissivity on large (kpc) scales, or on fluctuations due to MHD turbulence in the interstellar medium, we unify these approaches to match the angular power spectrum. We note that the usual turbulence cascade calculation ignores spatial correlations at the injection scale due to compression of the interstellar medium by old supernova remnants -- the 'radio loops', only four of which are visible by eye in radio maps. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.1078","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":"2026-05-18T03:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KgVK9+vBoKkrEdFefGaBF3pviR1TnsgdD2Y7FOx4tc6lW3rdqYQiTquybBd+geME/Xiq/jJwmwMGsORaaF9yCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:35:29.774135Z"},"content_sha256":"35ffee8d7f4b88456b160db5d06a744fac7dc7652664690ff7df6e4e2a6608d8","schema_version":"1.0","event_id":"sha256:35ffee8d7f4b88456b160db5d06a744fac7dc7652664690ff7df6e4e2a6608d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/bundle.json","state_url":"https://pith.science/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/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":"2026-05-23T00:35:29Z","links":{"resolver":"https://pith.science/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ","bundle":"https://pith.science/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/bundle.json","state":"https://pith.science/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HZSNH2JFX4BB26Q7K4IJOYS2SZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HZSNH2JFX4BB26Q7K4IJOYS2SZ","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":"6b5fa2c3f9f3f76ce91063446d9f3a7ce1266996e19d83208afed44a15ab469c","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-03T19:58:43Z","title_canon_sha256":"8d2527fa2279bbf08b2386e016e781f74f2f8d90bb17fcce47c4a1acf49ee4a2"},"schema_version":"1.0","source":{"id":"1304.1078","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.1078","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"1304.1078v2","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.1078","created_at":"2026-05-18T03:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"HZSNH2JFX4BB","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HZSNH2JFX4BB26Q7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HZSNH2JF","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:35ffee8d7f4b88456b160db5d06a744fac7dc7652664690ff7df6e4e2a6608d8","target":"graph","created_at":"2026-05-18T03:19:58Z","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":"We present a new model of the diffuse Galactic synchrotron radiation, concentrating on its angular anisotropies. While previous studies have focussed on either the variation of the emissivity on large (kpc) scales, or on fluctuations due to MHD turbulence in the interstellar medium, we unify these approaches to match the angular power spectrum. We note that the usual turbulence cascade calculation ignores spatial correlations at the injection scale due to compression of the interstellar medium by old supernova remnants -- the 'radio loops', only four of which are visible by eye in radio maps. ","authors_text":"Copenhagen), Philipp Mertsch (Stanford), Subir Sarkar (Oxford","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-03T19:58:43Z","title":"Loops and spurs: The angular power spectrum of the Galactic synchrotron background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.1078","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":"sha256:916495b7d6bdba788666f124eb5b7d31e3dd19e2ea88d4ff70151c26806e5229","target":"record","created_at":"2026-05-18T03:19:58Z","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":"6b5fa2c3f9f3f76ce91063446d9f3a7ce1266996e19d83208afed44a15ab469c","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-03T19:58:43Z","title_canon_sha256":"8d2527fa2279bbf08b2386e016e781f74f2f8d90bb17fcce47c4a1acf49ee4a2"},"schema_version":"1.0","source":{"id":"1304.1078","kind":"arxiv","version":2}},"canonical_sha256":"3e64d3e925bf021d7a1f571097625a96751149b3d4c095e417bce00e74d4aa46","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e64d3e925bf021d7a1f571097625a96751149b3d4c095e417bce00e74d4aa46","first_computed_at":"2026-05-18T03:19:58.889071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:58.889071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1t/ExWVJVsn7DVhUI+gEOKveNHYbqxrEPhzKbG6KiuKZ3FkGgmHP1ZQ+pv7fRS4J9JvUb9BYZ8UAIEs2WjEDCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:58.889797Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.1078","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:916495b7d6bdba788666f124eb5b7d31e3dd19e2ea88d4ff70151c26806e5229","sha256:35ffee8d7f4b88456b160db5d06a744fac7dc7652664690ff7df6e4e2a6608d8"],"state_sha256":"b2dc72bdada035a2ed07a0d946295cf09cb07ad4a9f8a5b3e2a15a0327983300"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D/bkLzSkA9iFAopnKU/Q/zRrvLP3Gybi2336DxPzme+qlOaqRlE8Yo1yvc9dXWrRMFStlwlpgEJNQABmbXp3AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T00:35:29.784111Z","bundle_sha256":"283e6733de36f34773a27cd05b1a2a1f953086d95dccd3308fd391b6cc0670e9"}}