{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:BASKEYDMPALCX2GYW6P7465TNI","short_pith_number":"pith:BASKEYDM","schema_version":"1.0","canonical_sha256":"0824a2606c78162be8d8b79ffe7bb36a086c48cbbc326bab048c207541f5f882","source":{"kind":"arxiv","id":"1112.1979","version":2},"attestation_state":"computed","paper":{"title":"Gamma-ray Activity in the Crab Nebula: The Exceptional Flare of April 2011","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Belfiore, A. F. Tennant, A. K. Harding, C. D. Dermer, E. Charles, E. Hays, F. D'Ammando, F. Massaro, J. Chiang, J. D. Scargle, J. E. Grove, L. Baldini, M. C. Weisskopf, M. G. Baring, M. Kerr, M. N. Mazziotta, P. M. Saz Parkinson, R. Buehler, R. D. Blandford, R. W. Romani, S. Funk","submitted_at":"2011-12-08T22:48:37Z","abstract_excerpt":"The Large Area Telescope on board the Fermi satellite observed a gamma-ray flare in the Crab nebula lasting for approximately nine days in April of 2011. The source, which at optical wavelengths has a size of ~11 ly across, doubled its gamma-ray flux within eight hours. The peak photon flux was (186 +- 6) 10-7 cm-2 s-1 above 100 MeV, which corresponds to a 30-fold increase compared to the average value. During the flare, a new component emerged in the spectral energy distribution, which peaked at an energy of (375 +- 26) MeV at flare maximum. The observations imply that the emission region was"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1112.1979","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-12-08T22:48:37Z","cross_cats_sorted":[],"title_canon_sha256":"ab5fb4a88fed9ccf0b259ab35e3738679d657f1b885ad3b441f1e5ddebba0ed1","abstract_canon_sha256":"2e2d44a58a60f95bf6b5e38feb655a01bde654107c090d2a32406d1c244ad001"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:14.732355Z","signature_b64":"3KcyZ+3/IgBrIez2z8n7nlNM+Ppb8+j4s8+3p3pK03tnYxpEChvpWFD7d6HC3B2yTn9mDe2ysujJ3g5r+GSQCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0824a2606c78162be8d8b79ffe7bb36a086c48cbbc326bab048c207541f5f882","last_reissued_at":"2026-05-18T01:59:14.731540Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:14.731540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gamma-ray Activity in the Crab Nebula: The Exceptional Flare of April 2011","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Belfiore, A. F. Tennant, A. K. Harding, C. D. Dermer, E. Charles, E. Hays, F. D'Ammando, F. Massaro, J. Chiang, J. D. Scargle, J. E. Grove, L. Baldini, M. C. Weisskopf, M. G. Baring, M. Kerr, M. N. Mazziotta, P. M. Saz Parkinson, R. Buehler, R. D. Blandford, R. W. Romani, S. Funk","submitted_at":"2011-12-08T22:48:37Z","abstract_excerpt":"The Large Area Telescope on board the Fermi satellite observed a gamma-ray flare in the Crab nebula lasting for approximately nine days in April of 2011. The source, which at optical wavelengths has a size of ~11 ly across, doubled its gamma-ray flux within eight hours. The peak photon flux was (186 +- 6) 10-7 cm-2 s-1 above 100 MeV, which corresponds to a 30-fold increase compared to the average value. During the flare, a new component emerged in the spectral energy distribution, which peaked at an energy of (375 +- 26) MeV at flare maximum. The observations imply that the emission region was"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.1979","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1112.1979","created_at":"2026-05-18T01:59:14.731672+00:00"},{"alias_kind":"arxiv_version","alias_value":"1112.1979v2","created_at":"2026-05-18T01:59:14.731672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.1979","created_at":"2026-05-18T01:59:14.731672+00:00"},{"alias_kind":"pith_short_12","alias_value":"BASKEYDMPALC","created_at":"2026-05-18T12:26:24.575870+00:00"},{"alias_kind":"pith_short_16","alias_value":"BASKEYDMPALCX2GY","created_at":"2026-05-18T12:26:24.575870+00:00"},{"alias_kind":"pith_short_8","alias_value":"BASKEYDM","created_at":"2026-05-18T12:26:24.575870+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI","json":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI.json","graph_json":"https://pith.science/api/pith-number/BASKEYDMPALCX2GYW6P7465TNI/graph.json","events_json":"https://pith.science/api/pith-number/BASKEYDMPALCX2GYW6P7465TNI/events.json","paper":"https://pith.science/paper/BASKEYDM"},"agent_actions":{"view_html":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI","download_json":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI.json","view_paper":"https://pith.science/paper/BASKEYDM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1112.1979&json=true","fetch_graph":"https://pith.science/api/pith-number/BASKEYDMPALCX2GYW6P7465TNI/graph.json","fetch_events":"https://pith.science/api/pith-number/BASKEYDMPALCX2GYW6P7465TNI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI/action/storage_attestation","attest_author":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI/action/author_attestation","sign_citation":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI/action/citation_signature","submit_replication":"https://pith.science/pith/BASKEYDMPALCX2GYW6P7465TNI/action/replication_record"}},"created_at":"2026-05-18T01:59:14.731672+00:00","updated_at":"2026-05-18T01:59:14.731672+00:00"}