{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:TJN7IJ6MFNZ5OXCKYKXNRZ32J3","short_pith_number":"pith:TJN7IJ6M","canonical_record":{"source":{"id":"1612.07083","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-12-21T12:58:29Z","cross_cats_sorted":[],"title_canon_sha256":"fcc5c90d18b4f159ce1a340a64e24fbbf981fbe52a9c4dcc4de7046081d90c42","abstract_canon_sha256":"f8b3c68dc7c06cce207ec822ab0a8971fa731bfa84c4901385d28a390f4b1055"},"schema_version":"1.0"},"canonical_sha256":"9a5bf427cc2b73d75c4ac2aed8e77a4ec62c9dfdc881c2d3da679852064313ce","source":{"kind":"arxiv","id":"1612.07083","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07083","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07083v1","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07083","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"TJN7IJ6MFNZ5","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"TJN7IJ6MFNZ5OXCK","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"TJN7IJ6M","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:TJN7IJ6MFNZ5OXCKYKXNRZ32J3","target":"record","payload":{"canonical_record":{"source":{"id":"1612.07083","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-12-21T12:58:29Z","cross_cats_sorted":[],"title_canon_sha256":"fcc5c90d18b4f159ce1a340a64e24fbbf981fbe52a9c4dcc4de7046081d90c42","abstract_canon_sha256":"f8b3c68dc7c06cce207ec822ab0a8971fa731bfa84c4901385d28a390f4b1055"},"schema_version":"1.0"},"canonical_sha256":"9a5bf427cc2b73d75c4ac2aed8e77a4ec62c9dfdc881c2d3da679852064313ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:46.114572Z","signature_b64":"hzcv6Ak8ZXE0wHZaFoWecRCOgDWPqHxFaFoHeHDQ7HiGIFfyZBeYx4emAYR/YDInUia0fDzyYm8Kp19Q+WpDDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a5bf427cc2b73d75c4ac2aed8e77a4ec62c9dfdc881c2d3da679852064313ce","last_reissued_at":"2026-05-18T00:50:46.113856Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:46.113856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.07083","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"owt+/PDoMxZmkWsm5n4IFWJihMx5dSOMhlSeKK+QyyBZ0uOZQb0B87/x0PO4iqPRsry3S8mTmXfwu/AzLS6SBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:38:26.071982Z"},"content_sha256":"e274c5fac8d1fd25582b756a0a3393539445cc3351345b69b4ec3978f1fe74e4","schema_version":"1.0","event_id":"sha256:e274c5fac8d1fd25582b756a0a3393539445cc3351345b69b4ec3978f1fe74e4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:TJN7IJ6MFNZ5OXCKYKXNRZ32J3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for transitions between states in redbacks and black widows using seven years of Fermi-LAT observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alessandro Papitto, Diego F. Torres, Emma de Ona Wilhelmi, Jian Li, Long Ji, Nanda Rea, Shu Zhang","submitted_at":"2016-12-21T12:58:29Z","abstract_excerpt":"Considering about seven years of Fermi-Large Area Telescope (LAT) data, we present a systematic search for variability possibly related to transitions between states in redbacks and black widow systems. Transitions are characterized by sudden and significant changes in the gamma-ray flux that persist on a timescale much larger than the orbital period. This phenomenology was already detected in the case of two redback systems, PSR J1023+0038 and PSR J1227-4853, for which we present here a dedicated study. We show the existence of only one transition for each of these systems over the past seven"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07083","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j0uCO7eI8oFJfmXS9Bjq6hCBIjOuZZrMi/G924nD1gn8tGNtAyRonHHfdGtp70GXk/Hj5kl1iHvqF0GvQiG/Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:38:26.072335Z"},"content_sha256":"1aaac1ce98b471549bc5fd3ea40e45c34429d8bc2af301bb3b3b8edf48f60070","schema_version":"1.0","event_id":"sha256:1aaac1ce98b471549bc5fd3ea40e45c34429d8bc2af301bb3b3b8edf48f60070"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/bundle.json","state_url":"https://pith.science/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/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":"2026-06-02T23:38:26Z","links":{"resolver":"https://pith.science/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3","bundle":"https://pith.science/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/bundle.json","state":"https://pith.science/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TJN7IJ6MFNZ5OXCKYKXNRZ32J3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:TJN7IJ6MFNZ5OXCKYKXNRZ32J3","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":"f8b3c68dc7c06cce207ec822ab0a8971fa731bfa84c4901385d28a390f4b1055","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-12-21T12:58:29Z","title_canon_sha256":"fcc5c90d18b4f159ce1a340a64e24fbbf981fbe52a9c4dcc4de7046081d90c42"},"schema_version":"1.0","source":{"id":"1612.07083","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07083","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07083v1","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07083","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"TJN7IJ6MFNZ5","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"TJN7IJ6MFNZ5OXCK","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"TJN7IJ6M","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:1aaac1ce98b471549bc5fd3ea40e45c34429d8bc2af301bb3b3b8edf48f60070","target":"graph","created_at":"2026-05-18T00:50:46Z","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":"Considering about seven years of Fermi-Large Area Telescope (LAT) data, we present a systematic search for variability possibly related to transitions between states in redbacks and black widow systems. Transitions are characterized by sudden and significant changes in the gamma-ray flux that persist on a timescale much larger than the orbital period. This phenomenology was already detected in the case of two redback systems, PSR J1023+0038 and PSR J1227-4853, for which we present here a dedicated study. We show the existence of only one transition for each of these systems over the past seven","authors_text":"Alessandro Papitto, Diego F. Torres, Emma de Ona Wilhelmi, Jian Li, Long Ji, Nanda Rea, Shu Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-12-21T12:58:29Z","title":"Search for transitions between states in redbacks and black widows using seven years of Fermi-LAT observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07083","kind":"arxiv","version":1},"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:e274c5fac8d1fd25582b756a0a3393539445cc3351345b69b4ec3978f1fe74e4","target":"record","created_at":"2026-05-18T00:50:46Z","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":"f8b3c68dc7c06cce207ec822ab0a8971fa731bfa84c4901385d28a390f4b1055","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-12-21T12:58:29Z","title_canon_sha256":"fcc5c90d18b4f159ce1a340a64e24fbbf981fbe52a9c4dcc4de7046081d90c42"},"schema_version":"1.0","source":{"id":"1612.07083","kind":"arxiv","version":1}},"canonical_sha256":"9a5bf427cc2b73d75c4ac2aed8e77a4ec62c9dfdc881c2d3da679852064313ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a5bf427cc2b73d75c4ac2aed8e77a4ec62c9dfdc881c2d3da679852064313ce","first_computed_at":"2026-05-18T00:50:46.113856Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:46.113856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hzcv6Ak8ZXE0wHZaFoWecRCOgDWPqHxFaFoHeHDQ7HiGIFfyZBeYx4emAYR/YDInUia0fDzyYm8Kp19Q+WpDDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:46.114572Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.07083","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e274c5fac8d1fd25582b756a0a3393539445cc3351345b69b4ec3978f1fe74e4","sha256:1aaac1ce98b471549bc5fd3ea40e45c34429d8bc2af301bb3b3b8edf48f60070"],"state_sha256":"d86a5e9d9a42c159ac85c64e8bee58bf40fd824f8184d335a2e7eeeddf649b4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8FiyvqUN+spPKMOBFi8U3sQWngpBvm5wVugoQEnaUJzM4ocLurpkXlEbRHlAMDlY1EeinmoJR53AXO3NdnfXDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:38:26.074277Z","bundle_sha256":"656659b774c9672f5550f93791ef9db411138d7969e450ad77df2b1dd6db2ac7"}}