{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:KJQEM2S2JU5NIQ6TVCQES2RQ63","short_pith_number":"pith:KJQEM2S2","canonical_record":{"source":{"id":"astro-ph/0405283","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-14T15:59:25Z","cross_cats_sorted":[],"title_canon_sha256":"0110bade2d99c244f83aabc2bae79acfc469098cc4d53c1108d2b046fac1ecd9","abstract_canon_sha256":"4899af110fd9d5997e3b5873e9bf22e91ebb94e1112a1f9530c745a5491c2c8b"},"schema_version":"1.0"},"canonical_sha256":"5260466a5a4d3ad443d3a8a0496a30f6cf2e9c0c832305f88658c5f0309a6b06","source":{"kind":"arxiv","id":"astro-ph/0405283","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405283","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405283v2","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405283","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_12","alias_value":"KJQEM2S2JU5N","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_16","alias_value":"KJQEM2S2JU5NIQ6T","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_8","alias_value":"KJQEM2S2","created_at":"2026-07-04T14:13:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:KJQEM2S2JU5NIQ6TVCQES2RQ63","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0405283","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-14T15:59:25Z","cross_cats_sorted":[],"title_canon_sha256":"0110bade2d99c244f83aabc2bae79acfc469098cc4d53c1108d2b046fac1ecd9","abstract_canon_sha256":"4899af110fd9d5997e3b5873e9bf22e91ebb94e1112a1f9530c745a5491c2c8b"},"schema_version":"1.0"},"canonical_sha256":"5260466a5a4d3ad443d3a8a0496a30f6cf2e9c0c832305f88658c5f0309a6b06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:13:28.774500Z","signature_b64":"l3wXlhwhRbpUOWsB/mgcKF1Tui2CqATfwatRee3y/FPuzVEiPo25/uIJZkAjK4qV9qAneP75g5yrS4r4sCdrAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5260466a5a4d3ad443d3a8a0496a30f6cf2e9c0c832305f88658c5f0309a6b06","last_reissued_at":"2026-07-04T14:13:28.774082Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:13:28.774082Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0405283","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T14:13:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UEylDjxIOm7/mJIFA+2DZv+eKNWSLWc8IYk/JQKIDKPbxBPAQd8bEt8WFhWtGcgYKRKxKlfUp6SIgA8F/RbeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T15:37:17.959369Z"},"content_sha256":"081779568be95cf19f4df3059e0b596a4d016668589be730897ba1ab0dda42ec","schema_version":"1.0","event_id":"sha256:081779568be95cf19f4df3059e0b596a4d016668589be730897ba1ab0dda42ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:KJQEM2S2JU5NIQ6TVCQES2RQ63","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical studies of companions to millisecond pulsars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. A. Jacoby (Caltech), C. G. Bassa (Utrecht Univ.), M. H. van Kerkwijk (Univ. of Toronto), P. G. Jonker (CfA)","submitted_at":"2004-05-14T15:59:25Z","abstract_excerpt":"Optical observations of the companions of pulsars can help determine the properties of the binaries, as well as those of their components, and give clues to the preceding evolution. In this review, we first describe the different classes of binary pulsars, and present a table with a summary what is known about their optical counterparts. Next, we focus on the class of pulsars that have low-mass, helium-core white dwarf companions. We discuss attempts to determine the masses of both components using optical spectroscopy, and compare the pulsar spin-down ages with cooling ages of the white dwarf"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405283","kind":"arxiv","version":2},"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/astro-ph/0405283/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":"2026-07-04T14:13:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ftr1bEeBCfbg4GpjX2T+Pd/8pF+6hywNQfexuS30gEtqTW8F9cBHoxfdDCnoFOb9Hxgvox3+xjNuUVafYcl5Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T15:37:17.959703Z"},"content_sha256":"08af91f752d1d453199337da9afd51df774f59c744d08c737706c619337c944a","schema_version":"1.0","event_id":"sha256:08af91f752d1d453199337da9afd51df774f59c744d08c737706c619337c944a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/bundle.json","state_url":"https://pith.science/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/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":"2026-08-13T15:37:17Z","links":{"resolver":"https://pith.science/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63","bundle":"https://pith.science/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/bundle.json","state":"https://pith.science/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJQEM2S2JU5NIQ6TVCQES2RQ63/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:KJQEM2S2JU5NIQ6TVCQES2RQ63","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":"4899af110fd9d5997e3b5873e9bf22e91ebb94e1112a1f9530c745a5491c2c8b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-14T15:59:25Z","title_canon_sha256":"0110bade2d99c244f83aabc2bae79acfc469098cc4d53c1108d2b046fac1ecd9"},"schema_version":"1.0","source":{"id":"astro-ph/0405283","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405283","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405283v2","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405283","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_12","alias_value":"KJQEM2S2JU5N","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_16","alias_value":"KJQEM2S2JU5NIQ6T","created_at":"2026-07-04T14:13:28Z"},{"alias_kind":"pith_short_8","alias_value":"KJQEM2S2","created_at":"2026-07-04T14:13:28Z"}],"graph_snapshots":[{"event_id":"sha256:08af91f752d1d453199337da9afd51df774f59c744d08c737706c619337c944a","target":"graph","created_at":"2026-07-04T14:13:28Z","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/astro-ph/0405283/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optical observations of the companions of pulsars can help determine the properties of the binaries, as well as those of their components, and give clues to the preceding evolution. In this review, we first describe the different classes of binary pulsars, and present a table with a summary what is known about their optical counterparts. Next, we focus on the class of pulsars that have low-mass, helium-core white dwarf companions. We discuss attempts to determine the masses of both components using optical spectroscopy, and compare the pulsar spin-down ages with cooling ages of the white dwarf","authors_text":"B. A. Jacoby (Caltech), C. G. Bassa (Utrecht Univ.), M. H. van Kerkwijk (Univ. of Toronto), P. G. Jonker (CfA)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-05-14T15:59:25Z","title":"Optical studies of companions to millisecond pulsars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405283","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":"sha256:081779568be95cf19f4df3059e0b596a4d016668589be730897ba1ab0dda42ec","target":"record","created_at":"2026-07-04T14:13:28Z","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":"4899af110fd9d5997e3b5873e9bf22e91ebb94e1112a1f9530c745a5491c2c8b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-14T15:59:25Z","title_canon_sha256":"0110bade2d99c244f83aabc2bae79acfc469098cc4d53c1108d2b046fac1ecd9"},"schema_version":"1.0","source":{"id":"astro-ph/0405283","kind":"arxiv","version":2}},"canonical_sha256":"5260466a5a4d3ad443d3a8a0496a30f6cf2e9c0c832305f88658c5f0309a6b06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5260466a5a4d3ad443d3a8a0496a30f6cf2e9c0c832305f88658c5f0309a6b06","first_computed_at":"2026-07-04T14:13:28.774082Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:13:28.774082Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l3wXlhwhRbpUOWsB/mgcKF1Tui2CqATfwatRee3y/FPuzVEiPo25/uIJZkAjK4qV9qAneP75g5yrS4r4sCdrAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T14:13:28.774500Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0405283","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:081779568be95cf19f4df3059e0b596a4d016668589be730897ba1ab0dda42ec","sha256:08af91f752d1d453199337da9afd51df774f59c744d08c737706c619337c944a"],"state_sha256":"ba7e3e5a69b7565b4641b3bd394bd73714cb87c16ed59442a3b1d071a29ee02d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8jmCpaGj58/zblIwQoluNEW5Z+FRmYiPJKfWywGZSmoQzmaKbVbwAik+aMWtkc5bIR2Lu2tVpptnHdVjeTv6Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T15:37:17.963242Z","bundle_sha256":"b8a1681f4027c402d0200c2e189713403457545ff15fe02642fc7b4c24881453"}}