{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:4NWVXEFCGFQQTFFB5ASNMNV3JK","short_pith_number":"pith:4NWVXEFC","canonical_record":{"source":{"id":"2303.11263","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-20T16:47:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"baf41bb2e166ea0eb255bbd568b5c0afdbf688fb1908cd0ef984fb419d1187be","abstract_canon_sha256":"372f32fdbac4d260e3bc204c4177f8a20b789307dff5ba1b12f10f94ea79f667"},"schema_version":"1.0"},"canonical_sha256":"e36d5b90a231610994a1e824d636bb4ab19b66ee535f5e062243e451c14dff7f","source":{"kind":"arxiv","id":"2303.11263","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.11263","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"2303.11263v1","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.11263","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"4NWVXEFCGFQQ","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_16","alias_value":"4NWVXEFCGFQQTFFB","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_8","alias_value":"4NWVXEFC","created_at":"2026-07-05T06:10:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:4NWVXEFCGFQQTFFB5ASNMNV3JK","target":"record","payload":{"canonical_record":{"source":{"id":"2303.11263","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-20T16:47:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"baf41bb2e166ea0eb255bbd568b5c0afdbf688fb1908cd0ef984fb419d1187be","abstract_canon_sha256":"372f32fdbac4d260e3bc204c4177f8a20b789307dff5ba1b12f10f94ea79f667"},"schema_version":"1.0"},"canonical_sha256":"e36d5b90a231610994a1e824d636bb4ab19b66ee535f5e062243e451c14dff7f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:10:35.752020Z","signature_b64":"VzYR76fybr6reDtNr9+CROYekwQpXRGA2kARqkW3TwwiTpvT5gFKHsnx5m8oXhHEhNm+u4+yTjLkSiNutaUSDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e36d5b90a231610994a1e824d636bb4ab19b66ee535f5e062243e451c14dff7f","last_reissued_at":"2026-07-05T06:10:35.751562Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:10:35.751562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.11263","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":"2026-07-05T06:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GCIKAI5B0EaiUOcc4jUeI5oHhDPtkvTz1zaQtPSUxemx7mm4YMGuiywunjNArG/WR0X40Qmn9rxI0Bq0nrUqAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-29T09:40:45.834847Z"},"content_sha256":"232079117b2485d6a6f4ed6a1b76868d6d5e572b04c7b869455cddcbb95b2143","schema_version":"1.0","event_id":"sha256:232079117b2485d6a6f4ed6a1b76868d6d5e572b04c7b869455cddcbb95b2143"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:4NWVXEFCGFQQTFFB5ASNMNV3JK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A young white dwarf orbiting PSR J1835-3259B in the bulge globular cluster NGC 6652","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Istrate, A. Possenti, A. Ridolfi, B. Lanzoni, C. Pallanca, F. Ferraro, J. Chen, M. Burgay, M. Cadelano, P. Freire, T. Gautam","submitted_at":"2023-03-20T16:47:02Z","abstract_excerpt":"We report on the discovery of the companion star to the millisecond pulsar PSR J1835-3259B in the Galactic globular cluster NGC 6652. Taking advantage of deep photometric archival observations acquired through the Hubble Space Telescope in near-ultraviolet and optical bands, we identified a bright and blue object at a position compatible with that of the radio pulsar. The companion is located along the helium-core white dwarf cooling sequence and the comparison with binary evolution models provides a mass of $0.17 \\pm 0.02~M_\\odot$, a surface temperature of $11500\\pm1900$ K and a very young co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.11263","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/2303.11263/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":"2026-07-05T06:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wSeECs6fcOqMXOi/EvWKaUtFfnLUMDu6WKU2vttFdQ8vcCJlAmXpPuYZ0TeTR1hjGwme+jV+nYbvycghxI43DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-29T09:40:45.835226Z"},"content_sha256":"782a587e3c4ad62a931f9702c0452c32577660ab695db4b865d43db64eee1ee8","schema_version":"1.0","event_id":"sha256:782a587e3c4ad62a931f9702c0452c32577660ab695db4b865d43db64eee1ee8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/bundle.json","state_url":"https://pith.science/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/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":"2026-07-29T09:40:45Z","links":{"resolver":"https://pith.science/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK","bundle":"https://pith.science/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/bundle.json","state":"https://pith.science/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4NWVXEFCGFQQTFFB5ASNMNV3JK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:4NWVXEFCGFQQTFFB5ASNMNV3JK","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":"372f32fdbac4d260e3bc204c4177f8a20b789307dff5ba1b12f10f94ea79f667","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-20T16:47:02Z","title_canon_sha256":"baf41bb2e166ea0eb255bbd568b5c0afdbf688fb1908cd0ef984fb419d1187be"},"schema_version":"1.0","source":{"id":"2303.11263","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.11263","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"2303.11263v1","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.11263","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"4NWVXEFCGFQQ","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_16","alias_value":"4NWVXEFCGFQQTFFB","created_at":"2026-07-05T06:10:35Z"},{"alias_kind":"pith_short_8","alias_value":"4NWVXEFC","created_at":"2026-07-05T06:10:35Z"}],"graph_snapshots":[{"event_id":"sha256:782a587e3c4ad62a931f9702c0452c32577660ab695db4b865d43db64eee1ee8","target":"graph","created_at":"2026-07-05T06:10:35Z","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/2303.11263/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on the discovery of the companion star to the millisecond pulsar PSR J1835-3259B in the Galactic globular cluster NGC 6652. Taking advantage of deep photometric archival observations acquired through the Hubble Space Telescope in near-ultraviolet and optical bands, we identified a bright and blue object at a position compatible with that of the radio pulsar. The companion is located along the helium-core white dwarf cooling sequence and the comparison with binary evolution models provides a mass of $0.17 \\pm 0.02~M_\\odot$, a surface temperature of $11500\\pm1900$ K and a very young co","authors_text":"A. Istrate, A. Possenti, A. Ridolfi, B. Lanzoni, C. Pallanca, F. Ferraro, J. Chen, M. Burgay, M. Cadelano, P. Freire, T. Gautam","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-20T16:47:02Z","title":"A young white dwarf orbiting PSR J1835-3259B in the bulge globular cluster NGC 6652"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.11263","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":"sha256:232079117b2485d6a6f4ed6a1b76868d6d5e572b04c7b869455cddcbb95b2143","target":"record","created_at":"2026-07-05T06:10:35Z","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":"372f32fdbac4d260e3bc204c4177f8a20b789307dff5ba1b12f10f94ea79f667","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-20T16:47:02Z","title_canon_sha256":"baf41bb2e166ea0eb255bbd568b5c0afdbf688fb1908cd0ef984fb419d1187be"},"schema_version":"1.0","source":{"id":"2303.11263","kind":"arxiv","version":1}},"canonical_sha256":"e36d5b90a231610994a1e824d636bb4ab19b66ee535f5e062243e451c14dff7f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e36d5b90a231610994a1e824d636bb4ab19b66ee535f5e062243e451c14dff7f","first_computed_at":"2026-07-05T06:10:35.751562Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:10:35.751562Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VzYR76fybr6reDtNr9+CROYekwQpXRGA2kARqkW3TwwiTpvT5gFKHsnx5m8oXhHEhNm+u4+yTjLkSiNutaUSDA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:10:35.752020Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.11263","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:232079117b2485d6a6f4ed6a1b76868d6d5e572b04c7b869455cddcbb95b2143","sha256:782a587e3c4ad62a931f9702c0452c32577660ab695db4b865d43db64eee1ee8"],"state_sha256":"198a48492f39b6b0906cc2011909b8ac8970e2684d0a16ffe66f0c812dcfaf2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u+waN8dqOiRfQhXBZf6mP99ilwN80XZ2BWBraCXmjPr+e0iRy+DWv0HsuQE/lzQ1v+u2rJGD/you2C1rmZfpAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-29T09:40:45.837736Z","bundle_sha256":"c61da59b1ae5d93f9902d752d838182e132dbaec2561682e7c7faee26a7d17f9"}}