{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:K3K7TPWSNB3LVHNKSOJCIBDRXC","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":"ab7df0a4e541cb26559303021ef2612de6b96747fe2091ad8351e597cc4e8431","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-06T19:02:49Z","title_canon_sha256":"d5ccb6cbda981f0b984c1368ddea3ee0150cf6f2b4a4661d9a831769509089a9"},"schema_version":"1.0","source":{"id":"0910.0908","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0908","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0908v1","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0908","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"pith_short_12","alias_value":"K3K7TPWSNB3L","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"K3K7TPWSNB3LVHNK","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"K3K7TPWS","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:988d4973bdb7dec74eff30b841e50129c2870d2d7f357057255b98fb8d403608","target":"graph","created_at":"2026-05-18T03:48:02Z","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 discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (~10^4 yr) with intense radio synchrotron emission in its shell and known to be interacting with a molecular cloud. The gamma-ray emission is spatially extended, broadly consistent with the radio and X-ray extent of SNR W51C. The energy spectrum in the 0.2-50 GeV band exhibits steepening toward high energies. The luminosity is greater than 1x10^{36} erg/s given the distance constraint","authors_text":"Fermi LAT collaboration","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-06T19:02:49Z","title":"Fermi-LAT Discovery of Extended Gamma-ray Emission in the Direction of Supernova Remnant W51C"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0908","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":"sha256:097951ad48d3d548446b04a222890ed5c0f0285aacaeb5a72a463a7a9aef897f","target":"record","created_at":"2026-05-18T03:48:02Z","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":"ab7df0a4e541cb26559303021ef2612de6b96747fe2091ad8351e597cc4e8431","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-06T19:02:49Z","title_canon_sha256":"d5ccb6cbda981f0b984c1368ddea3ee0150cf6f2b4a4661d9a831769509089a9"},"schema_version":"1.0","source":{"id":"0910.0908","kind":"arxiv","version":1}},"canonical_sha256":"56d5f9bed26876ba9daa9392240471b8ad9f00191e3ae99ee122317fed27f3ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56d5f9bed26876ba9daa9392240471b8ad9f00191e3ae99ee122317fed27f3ea","first_computed_at":"2026-05-18T03:48:02.217369Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:02.217369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9jyhcn0QMVS3Wz+dnUsQtdH1djGuvJnGS4YusSe123uU9hUcxNoKZ/Qfr/JXzkvPReH1RGkAaETvvkBl0l34BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:02.217782Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.0908","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:097951ad48d3d548446b04a222890ed5c0f0285aacaeb5a72a463a7a9aef897f","sha256:988d4973bdb7dec74eff30b841e50129c2870d2d7f357057255b98fb8d403608"],"state_sha256":"bc188b4c3b7f2ea9c116a51ce906e3de56ea7b10576078e5d605d437b2363221"}