{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:XYCZZLVL3VYKZV72QA7DCZEO7Z","short_pith_number":"pith:XYCZZLVL","canonical_record":{"source":{"id":"1904.00331","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-31T03:32:35Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"deac540112120a098c6e2414e8f8c0ac57149889a5cbd995f5705acad5949faf","abstract_canon_sha256":"9a6df99249c7640a21beee449c27457b45ef79f72981496a13594d1f16ebb765"},"schema_version":"1.0"},"canonical_sha256":"be059caeabdd70acd7fa803e31648efe7e41d789dd39d98d517185cd40bc5367","source":{"kind":"arxiv","id":"1904.00331","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00331","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00331v1","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00331","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_12","alias_value":"XYCZZLVL3VYK","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_16","alias_value":"XYCZZLVL3VYKZV72","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_8","alias_value":"XYCZZLVL","created_at":"2026-07-05T00:31:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:XYCZZLVL3VYKZV72QA7DCZEO7Z","target":"record","payload":{"canonical_record":{"source":{"id":"1904.00331","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-31T03:32:35Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"deac540112120a098c6e2414e8f8c0ac57149889a5cbd995f5705acad5949faf","abstract_canon_sha256":"9a6df99249c7640a21beee449c27457b45ef79f72981496a13594d1f16ebb765"},"schema_version":"1.0"},"canonical_sha256":"be059caeabdd70acd7fa803e31648efe7e41d789dd39d98d517185cd40bc5367","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:31:47.787235Z","signature_b64":"MA52Y1D/yiHO2Q36MKQ2o6c8YHyKZrGXEMKAQK4Oiiir3oohBG/kNmAU0Hv5Do9BAkK/QGBFdxegy8z2kYONBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be059caeabdd70acd7fa803e31648efe7e41d789dd39d98d517185cd40bc5367","last_reissued_at":"2026-07-05T00:31:47.786751Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:31:47.786751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.00331","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":"2026-07-05T00:31:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wvFAt4B5/tu72IVkCH/ewnbx0etVqB88pXGiCn+428CAHy+VuWlSOwA6FpRb+ZKJvJxZpqMl8GtBlJZbdBOrDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T02:55:33.073538Z"},"content_sha256":"5231c0e031358d4f383a77a56fa44cf3f4fa6fe408d078912ba81654e7a9ffe9","schema_version":"1.0","event_id":"sha256:5231c0e031358d4f383a77a56fa44cf3f4fa6fe408d078912ba81654e7a9ffe9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:XYCZZLVL3VYKZV72QA7DCZEO7Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of the PSR J1741+1351 white dwarf companion with the Gran Telescopio Canarias","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Cabrera-Lavers, A. V. Karpova, A. Yu. Kirichenko, D. A. Zyuzin, E. Fonseca, S. V. Zharikov, Yu. A. Shibanov","submitted_at":"2019-03-31T03:32:35Z","abstract_excerpt":"We report detection of the binary companion to the millisecond pulsar J1741+1351 with the Gran Telescopio Canarias. The optical source position coincides with the pulsar coordinates and its magnitudes are g' = 24.84(5), r' = 24.38(4) and i' = 24.17(4). Comparison of the data with the white dwarf evolutionary models shows that the source can be a He-core white dwarf with a temperature of $\\approx 6000$ K and a mass of $\\approx 0.2$ M$_{\\odot}$. The latter is in excellent agreement with the companion mass obtained from the radio timing solution for PSR J1741+1351."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00331","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/1904.00331/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":"2026-07-05T00:31:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v+LUsL8wPXFiyEKjAFpqDbDsaV8Yb7krF4ntbMwzJ0Hv2y5u6hY6mDJLl6VvzgWpk72Jt4wgMsCMLHP8cmbMCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T02:55:33.073911Z"},"content_sha256":"7fc921eb961cc868439e71423f4c37c7b5d468fe84747def7059ae000e22069c","schema_version":"1.0","event_id":"sha256:7fc921eb961cc868439e71423f4c37c7b5d468fe84747def7059ae000e22069c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/bundle.json","state_url":"https://pith.science/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/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":"2026-07-08T02:55:33Z","links":{"resolver":"https://pith.science/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z","bundle":"https://pith.science/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/bundle.json","state":"https://pith.science/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XYCZZLVL3VYKZV72QA7DCZEO7Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XYCZZLVL3VYKZV72QA7DCZEO7Z","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":"9a6df99249c7640a21beee449c27457b45ef79f72981496a13594d1f16ebb765","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-31T03:32:35Z","title_canon_sha256":"deac540112120a098c6e2414e8f8c0ac57149889a5cbd995f5705acad5949faf"},"schema_version":"1.0","source":{"id":"1904.00331","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00331","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00331v1","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00331","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_12","alias_value":"XYCZZLVL3VYK","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_16","alias_value":"XYCZZLVL3VYKZV72","created_at":"2026-07-05T00:31:47Z"},{"alias_kind":"pith_short_8","alias_value":"XYCZZLVL","created_at":"2026-07-05T00:31:47Z"}],"graph_snapshots":[{"event_id":"sha256:7fc921eb961cc868439e71423f4c37c7b5d468fe84747def7059ae000e22069c","target":"graph","created_at":"2026-07-05T00:31:47Z","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/1904.00331/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report detection of the binary companion to the millisecond pulsar J1741+1351 with the Gran Telescopio Canarias. The optical source position coincides with the pulsar coordinates and its magnitudes are g' = 24.84(5), r' = 24.38(4) and i' = 24.17(4). Comparison of the data with the white dwarf evolutionary models shows that the source can be a He-core white dwarf with a temperature of $\\approx 6000$ K and a mass of $\\approx 0.2$ M$_{\\odot}$. The latter is in excellent agreement with the companion mass obtained from the radio timing solution for PSR J1741+1351.","authors_text":"A. Cabrera-Lavers, A. V. Karpova, A. Yu. Kirichenko, D. A. Zyuzin, E. Fonseca, S. V. Zharikov, Yu. A. Shibanov","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-31T03:32:35Z","title":"Detection of the PSR J1741+1351 white dwarf companion with the Gran Telescopio Canarias"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00331","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":"sha256:5231c0e031358d4f383a77a56fa44cf3f4fa6fe408d078912ba81654e7a9ffe9","target":"record","created_at":"2026-07-05T00:31:47Z","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":"9a6df99249c7640a21beee449c27457b45ef79f72981496a13594d1f16ebb765","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-31T03:32:35Z","title_canon_sha256":"deac540112120a098c6e2414e8f8c0ac57149889a5cbd995f5705acad5949faf"},"schema_version":"1.0","source":{"id":"1904.00331","kind":"arxiv","version":1}},"canonical_sha256":"be059caeabdd70acd7fa803e31648efe7e41d789dd39d98d517185cd40bc5367","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be059caeabdd70acd7fa803e31648efe7e41d789dd39d98d517185cd40bc5367","first_computed_at":"2026-07-05T00:31:47.786751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:31:47.786751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MA52Y1D/yiHO2Q36MKQ2o6c8YHyKZrGXEMKAQK4Oiiir3oohBG/kNmAU0Hv5Do9BAkK/QGBFdxegy8z2kYONBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:31:47.787235Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.00331","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5231c0e031358d4f383a77a56fa44cf3f4fa6fe408d078912ba81654e7a9ffe9","sha256:7fc921eb961cc868439e71423f4c37c7b5d468fe84747def7059ae000e22069c"],"state_sha256":"ee628b39f78f839f326363eee6cf2aec72460ac5b6c498605dda884170ebed78"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MGh/TcuSoKzyRqcXlx+qtU7peoRFSboy/qHjjlRh8XnhL5YMtX4jO20K7ClAsepHlFOTFW/NFpk5E+vZL+szCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T02:55:33.075936Z","bundle_sha256":"b889a57b74d3c1ec640029bb0c06e2e75c6290422cdea5fc60527e70689d0f84"}}