{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:FYRWBPEVSFGDJHHJ3JK2V52DML","short_pith_number":"pith:FYRWBPEV","schema_version":"1.0","canonical_sha256":"2e2360bc95914c349ce9da55aaf74362f27397e1c7cd0d0f4d8f872cc1e82089","source":{"kind":"arxiv","id":"0910.3565","version":1},"attestation_state":"computed","paper":{"title":"Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"D.E. Harris, et al., F. Massaro, L. Stawarz, The Fermi LAT Collaboration: A.A. Abdo","submitted_at":"2009-10-19T16:14:38Z","abstract_excerpt":"We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consistent with the center of the radio galaxy M87, at a source significance of over 10 sigma in ten-months of all-sky survey data. Following the detections of Cen A and Per A, this makes M87 the third radio galaxy seen with the LAT. The faint point-like gamma-ray source has a >100 MeV flux of 2.45 (+/- 0.63) x 10^-8 ph cm^-2 s^-1 (photon index = 2.26 +/- 0.13) with no significant variability detected within the LAT observation. This flux is comparable with the previous EGRET upper limit (< 2.18 x 10^-8 "},"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":"0910.3565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-19T16:14:38Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"ec5dc11dfac37439a105d4735cc99ba86eda4e45ab6f3fffbfff8ea23c33080f","abstract_canon_sha256":"09926815eadb4f2a38f0cdbd8b92f8962d2604cbeb687338d60f8b37609eb437"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:17:01.869282Z","signature_b64":"5FFCdAU2CielPMKLfdHxVV+Qv0xz90bhHvBzosVu7vO17AkxzUnOVbx+wtLXzXWCXH/4YHF1Ax3nJRXgglxhAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e2360bc95914c349ce9da55aaf74362f27397e1c7cd0d0f4d8f872cc1e82089","last_reissued_at":"2026-07-04T17:17:01.868877Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:17:01.868877Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"D.E. Harris, et al., F. Massaro, L. Stawarz, The Fermi LAT Collaboration: A.A. Abdo","submitted_at":"2009-10-19T16:14:38Z","abstract_excerpt":"We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consistent with the center of the radio galaxy M87, at a source significance of over 10 sigma in ten-months of all-sky survey data. Following the detections of Cen A and Per A, this makes M87 the third radio galaxy seen with the LAT. The faint point-like gamma-ray source has a >100 MeV flux of 2.45 (+/- 0.63) x 10^-8 ph cm^-2 s^-1 (photon index = 2.26 +/- 0.13) with no significant variability detected within the LAT observation. This flux is comparable with the previous EGRET upper limit (< 2.18 x 10^-8 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.3565","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0910.3565/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"0910.3565","created_at":"2026-07-04T17:17:01.868932+00:00"},{"alias_kind":"arxiv_version","alias_value":"0910.3565v1","created_at":"2026-07-04T17:17:01.868932+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.3565","created_at":"2026-07-04T17:17:01.868932+00:00"},{"alias_kind":"pith_short_12","alias_value":"FYRWBPEVSFGD","created_at":"2026-07-04T17:17:01.868932+00:00"},{"alias_kind":"pith_short_16","alias_value":"FYRWBPEVSFGDJHHJ","created_at":"2026-07-04T17:17:01.868932+00:00"},{"alias_kind":"pith_short_8","alias_value":"FYRWBPEV","created_at":"2026-07-04T17:17:01.868932+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2606.25814","citing_title":"Compact radio galaxies: the case of FR0s","ref_index":220,"is_internal_anchor":true},{"citing_arxiv_id":"2605.21320","citing_title":"FR0 radio galaxy jets -- I. linking jet dynamics and high-energy emission in LEDA 55267 and LEDA 58287","ref_index":3,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML","json":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML.json","graph_json":"https://pith.science/api/pith-number/FYRWBPEVSFGDJHHJ3JK2V52DML/graph.json","events_json":"https://pith.science/api/pith-number/FYRWBPEVSFGDJHHJ3JK2V52DML/events.json","paper":"https://pith.science/paper/FYRWBPEV"},"agent_actions":{"view_html":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML","download_json":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML.json","view_paper":"https://pith.science/paper/FYRWBPEV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0910.3565&json=true","fetch_graph":"https://pith.science/api/pith-number/FYRWBPEVSFGDJHHJ3JK2V52DML/graph.json","fetch_events":"https://pith.science/api/pith-number/FYRWBPEVSFGDJHHJ3JK2V52DML/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML/action/storage_attestation","attest_author":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML/action/author_attestation","sign_citation":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML/action/citation_signature","submit_replication":"https://pith.science/pith/FYRWBPEVSFGDJHHJ3JK2V52DML/action/replication_record"}},"created_at":"2026-07-04T17:17:01.868932+00:00","updated_at":"2026-07-04T17:17:01.868932+00:00"}