{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:U5YURAQFDIYTHH73ECXWSBCDCM","short_pith_number":"pith:U5YURAQF","schema_version":"1.0","canonical_sha256":"a7714882051a31339ffb20af6904431332220e803aa934505cbadf5b256a651f","source":{"kind":"arxiv","id":"0904.4280","version":1},"attestation_state":"computed","paper":{"title":"Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"et al, Fermi/LAT Collaboration: A. A. Abdo","submitted_at":"2009-04-27T23:23:58Z","abstract_excerpt":"This is the first report of Fermi Gamma-ray Space Telescope observations of the quasar 3C 454.3, which has been undergoing pronounced long-term outbursts since 2000. The data from the Large Area Telescope (LAT), covering 2008 July 7 - October 6, indicate strong, highly variable gamma-ray emission with an average flux of ~3 x 10^{-6} photons cm^{-2} s^{-1}, for energies above 100 MeV. The gamma-ray flux is variable, with strong, distinct, symmetrically-shaped flares for which the flux increases by a factor of several on a time scale of about three days. This variability indicates a compact emis"},"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":"0904.4280","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-04-27T23:23:58Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"e778695916ae8ba4afa97c60769b0f4dcced18d37fbcefe0224b5456ee2ff122","abstract_canon_sha256":"0ec918d1526e1e92b209db617f587172a6f6a84a85ca0cfe33755e310251cffe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:02.670311Z","signature_b64":"Cb1Hupd9g7XHHW1qfSjd+gInHOu9zgBQMLUcGuNd96OExCulaFEZnu5pxsTKEhUdhWdR4ZpaFBP/oIroCa7sDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7714882051a31339ffb20af6904431332220e803aa934505cbadf5b256a651f","last_reissued_at":"2026-05-18T03:48:02.669842Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:02.669842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"et al, Fermi/LAT Collaboration: A. A. Abdo","submitted_at":"2009-04-27T23:23:58Z","abstract_excerpt":"This is the first report of Fermi Gamma-ray Space Telescope observations of the quasar 3C 454.3, which has been undergoing pronounced long-term outbursts since 2000. The data from the Large Area Telescope (LAT), covering 2008 July 7 - October 6, indicate strong, highly variable gamma-ray emission with an average flux of ~3 x 10^{-6} photons cm^{-2} s^{-1}, for energies above 100 MeV. The gamma-ray flux is variable, with strong, distinct, symmetrically-shaped flares for which the flux increases by a factor of several on a time scale of about three days. This variability indicates a compact emis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.4280","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0904.4280","created_at":"2026-05-18T03:48:02.669913+00:00"},{"alias_kind":"arxiv_version","alias_value":"0904.4280v1","created_at":"2026-05-18T03:48:02.669913+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.4280","created_at":"2026-05-18T03:48:02.669913+00:00"},{"alias_kind":"pith_short_12","alias_value":"U5YURAQFDIYT","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_16","alias_value":"U5YURAQFDIYTHH73","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_8","alias_value":"U5YURAQF","created_at":"2026-05-18T12:26:02.257875+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/U5YURAQFDIYTHH73ECXWSBCDCM","json":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM.json","graph_json":"https://pith.science/api/pith-number/U5YURAQFDIYTHH73ECXWSBCDCM/graph.json","events_json":"https://pith.science/api/pith-number/U5YURAQFDIYTHH73ECXWSBCDCM/events.json","paper":"https://pith.science/paper/U5YURAQF"},"agent_actions":{"view_html":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM","download_json":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM.json","view_paper":"https://pith.science/paper/U5YURAQF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0904.4280&json=true","fetch_graph":"https://pith.science/api/pith-number/U5YURAQFDIYTHH73ECXWSBCDCM/graph.json","fetch_events":"https://pith.science/api/pith-number/U5YURAQFDIYTHH73ECXWSBCDCM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM/action/storage_attestation","attest_author":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM/action/author_attestation","sign_citation":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM/action/citation_signature","submit_replication":"https://pith.science/pith/U5YURAQFDIYTHH73ECXWSBCDCM/action/replication_record"}},"created_at":"2026-05-18T03:48:02.669913+00:00","updated_at":"2026-05-18T03:48:02.669913+00:00"}