{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:MI6BKLSGNU2X4YG3A2ASGRC4D2","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":"a32f38c1b0465924e7c0a9251651685ba0d5be5e7014e1485cdffe17f325403e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-06-02T20:00:14Z","title_canon_sha256":"a6fe7ad34d2f6a903d868108a1dec88ab5216c704558d4f7b86d188caf0dac1d"},"schema_version":"1.0","source":{"id":"1406.0507","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.0507","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"arxiv_version","alias_value":"1406.0507v2","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.0507","created_at":"2026-05-18T02:38:29Z"},{"alias_kind":"pith_short_12","alias_value":"MI6BKLSGNU2X","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"MI6BKLSGNU2X4YG3","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"MI6BKLSG","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:53462f8cd50b18274eed5f7b4ab613ce36a4692df694e68126abd4febaad72ae","target":"graph","created_at":"2026-05-18T02:38:29Z","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 Large Area Telescope on the Fermi Gamma-ray Space Telescope has a point spread function with large tails, consisting of events affected by tracker ineffiencies, inactive volumes, and hard scattering; these tails can make source confusion a limiting factor. The parameter CTBCORE, available in the publicly available Extended Fermi LAT data, estimates the quality of each event's direction reconstruction; by implementing a cut in this parameter, the tails of the point spread function can be suppressed at the cost of losing effective area. We implement cuts on CTBCORE and present updated instru","authors_text":"Douglas P. Finkbeiner, Stephen K. N. Portillo","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-06-02T20:00:14Z","title":"Sharper Fermi LAT Images: instrument response functions for an improved event selection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.0507","kind":"arxiv","version":2},"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":"sha256:0176e8b6eb04fa1622d632f33d8fb9badd5ad05fc8ac107fa99d00faaeb67bc0","target":"record","created_at":"2026-05-18T02:38:29Z","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":"a32f38c1b0465924e7c0a9251651685ba0d5be5e7014e1485cdffe17f325403e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-06-02T20:00:14Z","title_canon_sha256":"a6fe7ad34d2f6a903d868108a1dec88ab5216c704558d4f7b86d188caf0dac1d"},"schema_version":"1.0","source":{"id":"1406.0507","kind":"arxiv","version":2}},"canonical_sha256":"623c152e466d357e60db068123445c1e989df48887bbf24e6e29868414087200","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"623c152e466d357e60db068123445c1e989df48887bbf24e6e29868414087200","first_computed_at":"2026-05-18T02:38:29.519067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:38:29.519067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h2Ntlw4vS0j7X82Zi0QtQcllBnNpSV0BnQUo+iYGf2LBPupoyrpgbA+rgD1LPGP886YNqADJEy0LTWF87VJvDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:38:29.519820Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.0507","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0176e8b6eb04fa1622d632f33d8fb9badd5ad05fc8ac107fa99d00faaeb67bc0","sha256:53462f8cd50b18274eed5f7b4ab613ce36a4692df694e68126abd4febaad72ae"],"state_sha256":"bb1a9d2eb4046b7177476c9e2e61a4e4c63ab9c0618fbd71660ceb754566a500"}