{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:EPOKWEAV5CQVTXHFDF6UKEBSED","short_pith_number":"pith:EPOKWEAV","canonical_record":{"source":{"id":"2005.11208","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-22T14:35:59Z","cross_cats_sorted":[],"title_canon_sha256":"f58ad3f84f7dee1f604e9b07dfc9d3c06177f6b8a20cf310219de77f3b5dc95d","abstract_canon_sha256":"ecef17936290fe0b8242eb87dd7ea91897c9f804f686f33a632669f0a2c33cc3"},"schema_version":"1.0"},"canonical_sha256":"23dcab1015e8a159dce5197d45103220edd2332c8c2b7149f95cc018e1460fd8","source":{"kind":"arxiv","id":"2005.11208","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.11208","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"arxiv_version","alias_value":"2005.11208v5","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.11208","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_12","alias_value":"EPOKWEAV5CQV","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_16","alias_value":"EPOKWEAV5CQVTXHF","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_8","alias_value":"EPOKWEAV","created_at":"2026-07-05T02:00:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:EPOKWEAV5CQVTXHFDF6UKEBSED","target":"record","payload":{"canonical_record":{"source":{"id":"2005.11208","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-22T14:35:59Z","cross_cats_sorted":[],"title_canon_sha256":"f58ad3f84f7dee1f604e9b07dfc9d3c06177f6b8a20cf310219de77f3b5dc95d","abstract_canon_sha256":"ecef17936290fe0b8242eb87dd7ea91897c9f804f686f33a632669f0a2c33cc3"},"schema_version":"1.0"},"canonical_sha256":"23dcab1015e8a159dce5197d45103220edd2332c8c2b7149f95cc018e1460fd8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:00:11.070585Z","signature_b64":"wW29fh2UFvPQGjMfwIHP1bYHsu4BqgoWQ3wfvNR8w01OCptuiKhWtSHBagxMm8qtXEkGq3gRSjI0/u85+UVECg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23dcab1015e8a159dce5197d45103220edd2332c8c2b7149f95cc018e1460fd8","last_reissued_at":"2026-07-05T02:00:11.070137Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:00:11.070137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.11208","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:00:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Frts6Ye0swcqg1w5esaC6bKy4YuyywqcMvemcCRqie+u+5Ru9h53J3v6cweqzEaap4eNQRxxJsn26RUd8kujBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:04:47.575438Z"},"content_sha256":"8c1bf4cfb2a5ac8295c82714be17ba506f9c6630fe28388156f450774688a58a","schema_version":"1.0","event_id":"sha256:8c1bf4cfb2a5ac8295c82714be17ba506f9c6630fe28388156f450774688a58a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:EPOKWEAV5CQVTXHFDF6UKEBSED","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fermi Large Area Telescope Fourth Source Catalog Data Release 2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"B. Lott (for the Fermi-LAT collaboration), J. Ballet, S.W. Digel, T.H. Burnett","submitted_at":"2020-05-22T14:35:59Z","abstract_excerpt":"We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals). Among the 5064 4FGL sources, 120 are formally below the detection threshold over 10 years (but are kept in the list), whil"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.11208","kind":"arxiv","version":5},"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/2005.11208/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:00:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AgRTgPHznSG8nWgFaay6fZ4/lc/eyQABi0hVob9y6gmg8LPiD3szimQ8ZryRSrKV/G5ETfKSYl4tDHHxaWl7DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:04:47.576040Z"},"content_sha256":"a6968c11b222e2b5a51a9c75fbfe1cecaf42330af96360405ab2ace373f9391c","schema_version":"1.0","event_id":"sha256:a6968c11b222e2b5a51a9c75fbfe1cecaf42330af96360405ab2ace373f9391c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/bundle.json","state_url":"https://pith.science/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/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":"2026-08-05T14:04:47Z","links":{"resolver":"https://pith.science/pith/EPOKWEAV5CQVTXHFDF6UKEBSED","bundle":"https://pith.science/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/bundle.json","state":"https://pith.science/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EPOKWEAV5CQVTXHFDF6UKEBSED/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:EPOKWEAV5CQVTXHFDF6UKEBSED","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":"ecef17936290fe0b8242eb87dd7ea91897c9f804f686f33a632669f0a2c33cc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-22T14:35:59Z","title_canon_sha256":"f58ad3f84f7dee1f604e9b07dfc9d3c06177f6b8a20cf310219de77f3b5dc95d"},"schema_version":"1.0","source":{"id":"2005.11208","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.11208","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"arxiv_version","alias_value":"2005.11208v5","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.11208","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_12","alias_value":"EPOKWEAV5CQV","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_16","alias_value":"EPOKWEAV5CQVTXHF","created_at":"2026-07-05T02:00:11Z"},{"alias_kind":"pith_short_8","alias_value":"EPOKWEAV","created_at":"2026-07-05T02:00:11Z"}],"graph_snapshots":[{"event_id":"sha256:a6968c11b222e2b5a51a9c75fbfe1cecaf42330af96360405ab2ace373f9391c","target":"graph","created_at":"2026-07-05T02:00:11Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2005.11208/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals). Among the 5064 4FGL sources, 120 are formally below the detection threshold over 10 years (but are kept in the list), whil","authors_text":"B. Lott (for the Fermi-LAT collaboration), J. Ballet, S.W. Digel, T.H. Burnett","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-22T14:35:59Z","title":"Fermi Large Area Telescope Fourth Source Catalog Data Release 2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.11208","kind":"arxiv","version":5},"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":"sha256:8c1bf4cfb2a5ac8295c82714be17ba506f9c6630fe28388156f450774688a58a","target":"record","created_at":"2026-07-05T02:00:11Z","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":"ecef17936290fe0b8242eb87dd7ea91897c9f804f686f33a632669f0a2c33cc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-22T14:35:59Z","title_canon_sha256":"f58ad3f84f7dee1f604e9b07dfc9d3c06177f6b8a20cf310219de77f3b5dc95d"},"schema_version":"1.0","source":{"id":"2005.11208","kind":"arxiv","version":5}},"canonical_sha256":"23dcab1015e8a159dce5197d45103220edd2332c8c2b7149f95cc018e1460fd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23dcab1015e8a159dce5197d45103220edd2332c8c2b7149f95cc018e1460fd8","first_computed_at":"2026-07-05T02:00:11.070137Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:00:11.070137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wW29fh2UFvPQGjMfwIHP1bYHsu4BqgoWQ3wfvNR8w01OCptuiKhWtSHBagxMm8qtXEkGq3gRSjI0/u85+UVECg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:00:11.070585Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.11208","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c1bf4cfb2a5ac8295c82714be17ba506f9c6630fe28388156f450774688a58a","sha256:a6968c11b222e2b5a51a9c75fbfe1cecaf42330af96360405ab2ace373f9391c"],"state_sha256":"c87e3ff63950c8003d4e95ce75ec2b4a30e89239f5c4a9a519112a360fb4a625"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3CB3F1KcUMkw+ZZrtbn2sbL7RvE5ADpmbrSsZpYrvpSemeo1vkiKCZGeERuqHPnUJEH74ElgUgP2gJbfCnMpBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T14:04:47.579946Z","bundle_sha256":"2231069aec45000d824fe8e654713dcbd2ff448dd99880721c66d5d9243a39d6"}}