{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:VRBLGREZ6ZNV2GKRV2RTTLT44K","short_pith_number":"pith:VRBLGREZ","canonical_record":{"source":{"id":"2303.07369","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-13T18:00:03Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9b6d0ac91b2723da733f1df5e9e135b1d8b18ca39e9e7a54744967a9e990bd46","abstract_canon_sha256":"c8fb271340f2661d1be95770169a9230200779469e7c48f1cd0fb77005e6adfa"},"schema_version":"1.0"},"canonical_sha256":"ac42b34499f65b5d1951aea339ae7ce28c9776707cca7638faf2ace3a58692b5","source":{"kind":"arxiv","id":"2303.07369","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.07369","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"2303.07369v1","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.07369","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"VRBLGREZ6ZNV","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_16","alias_value":"VRBLGREZ6ZNV2GKR","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_8","alias_value":"VRBLGREZ","created_at":"2026-07-05T05:55:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:VRBLGREZ6ZNV2GKRV2RTTLT44K","target":"record","payload":{"canonical_record":{"source":{"id":"2303.07369","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-13T18:00:03Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9b6d0ac91b2723da733f1df5e9e135b1d8b18ca39e9e7a54744967a9e990bd46","abstract_canon_sha256":"c8fb271340f2661d1be95770169a9230200779469e7c48f1cd0fb77005e6adfa"},"schema_version":"1.0"},"canonical_sha256":"ac42b34499f65b5d1951aea339ae7ce28c9776707cca7638faf2ace3a58692b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:55:53.563044Z","signature_b64":"3YVhc4LmQDEfFpCZ6eZOMmrw52v4UQHpV+U/5KvNsqQXTQLsIds7C4p3D0HT9dahbnTX0W68pWkTR0bsX208Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac42b34499f65b5d1951aea339ae7ce28c9776707cca7638faf2ace3a58692b5","last_reissued_at":"2026-07-05T05:55:53.562550Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:55:53.562550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.07369","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":"2026-07-05T05:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HKOHZ6FaaqUE/KeWHYkzQWmYa/z44VDRikZWJtGHtxr7bwpfYzFZMwzK95TOFnN0mnbdKtmo/toIKa/N/CX1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:19:37.599870Z"},"content_sha256":"d5a3d1b0a0739f06b2acf858314d83a9df781495d5f0c8e2e7c2236496a205d4","schema_version":"1.0","event_id":"sha256:d5a3d1b0a0739f06b2acf858314d83a9df781495d5f0c8e2e7c2236496a205d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:VRBLGREZ6ZNV2GKRV2RTTLT44K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Updated radial velocities and new constraints on the nature of the unseen source in NGC1850 BH1","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Angela Kochoska, Christopher Usher, Hugues Sana, Jerome A. Orosz, Julia Bodensteiner, Mark Gieles, Nate Bastian, Sara Saracino, Sebastian Kamann, Tomer Shenar","submitted_at":"2023-03-13T18:00:03Z","abstract_excerpt":"A black hole candidate orbiting a luminous star in the Large Magellanic Cloud young cluster NGC 1850 ($\\sim100$Myr) has recently been reported based on radial velocity and light curve modelling. Subsequently, an alternative explanation has been suggested for the system: a bloated post-mass transfer secondary star (M$_{\\rm initial} \\sim 4-5M_{\\odot}$, M$_{\\rm current} \\sim 1-2M_{\\odot}$) with a more massive, yet luminous companion (the primary). Upon reanalysis of the MUSE spectra, we found that the radial velocity variations originally reported were underestimated ($K_{\\rm 2,revised} = 176\\pm3"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.07369","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/2303.07369/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":"2026-07-05T05:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iCD13z9cRruEGRQBHt4IseV8Tz5AUJ0K4NflLxQRF9sVpp985V1144whtcyRTsRzjUmHBxjVmWYIB/asQUo7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:19:37.600247Z"},"content_sha256":"09089178c87a05b0c3f3b22e7fd3166f0e2b9e2d62af904525b48123ce67d12f","schema_version":"1.0","event_id":"sha256:09089178c87a05b0c3f3b22e7fd3166f0e2b9e2d62af904525b48123ce67d12f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/bundle.json","state_url":"https://pith.science/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/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":"2026-07-07T09:19:37Z","links":{"resolver":"https://pith.science/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K","bundle":"https://pith.science/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/bundle.json","state":"https://pith.science/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VRBLGREZ6ZNV2GKRV2RTTLT44K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:VRBLGREZ6ZNV2GKRV2RTTLT44K","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":"c8fb271340f2661d1be95770169a9230200779469e7c48f1cd0fb77005e6adfa","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-13T18:00:03Z","title_canon_sha256":"9b6d0ac91b2723da733f1df5e9e135b1d8b18ca39e9e7a54744967a9e990bd46"},"schema_version":"1.0","source":{"id":"2303.07369","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.07369","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"2303.07369v1","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.07369","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"VRBLGREZ6ZNV","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_16","alias_value":"VRBLGREZ6ZNV2GKR","created_at":"2026-07-05T05:55:53Z"},{"alias_kind":"pith_short_8","alias_value":"VRBLGREZ","created_at":"2026-07-05T05:55:53Z"}],"graph_snapshots":[{"event_id":"sha256:09089178c87a05b0c3f3b22e7fd3166f0e2b9e2d62af904525b48123ce67d12f","target":"graph","created_at":"2026-07-05T05:55:53Z","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/2303.07369/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A black hole candidate orbiting a luminous star in the Large Magellanic Cloud young cluster NGC 1850 ($\\sim100$Myr) has recently been reported based on radial velocity and light curve modelling. Subsequently, an alternative explanation has been suggested for the system: a bloated post-mass transfer secondary star (M$_{\\rm initial} \\sim 4-5M_{\\odot}$, M$_{\\rm current} \\sim 1-2M_{\\odot}$) with a more massive, yet luminous companion (the primary). Upon reanalysis of the MUSE spectra, we found that the radial velocity variations originally reported were underestimated ($K_{\\rm 2,revised} = 176\\pm3","authors_text":"Angela Kochoska, Christopher Usher, Hugues Sana, Jerome A. Orosz, Julia Bodensteiner, Mark Gieles, Nate Bastian, Sara Saracino, Sebastian Kamann, Tomer Shenar","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-13T18:00:03Z","title":"Updated radial velocities and new constraints on the nature of the unseen source in NGC1850 BH1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.07369","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:d5a3d1b0a0739f06b2acf858314d83a9df781495d5f0c8e2e7c2236496a205d4","target":"record","created_at":"2026-07-05T05:55:53Z","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":"c8fb271340f2661d1be95770169a9230200779469e7c48f1cd0fb77005e6adfa","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-03-13T18:00:03Z","title_canon_sha256":"9b6d0ac91b2723da733f1df5e9e135b1d8b18ca39e9e7a54744967a9e990bd46"},"schema_version":"1.0","source":{"id":"2303.07369","kind":"arxiv","version":1}},"canonical_sha256":"ac42b34499f65b5d1951aea339ae7ce28c9776707cca7638faf2ace3a58692b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac42b34499f65b5d1951aea339ae7ce28c9776707cca7638faf2ace3a58692b5","first_computed_at":"2026-07-05T05:55:53.562550Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:55:53.562550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3YVhc4LmQDEfFpCZ6eZOMmrw52v4UQHpV+U/5KvNsqQXTQLsIds7C4p3D0HT9dahbnTX0W68pWkTR0bsX208Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:55:53.563044Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.07369","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5a3d1b0a0739f06b2acf858314d83a9df781495d5f0c8e2e7c2236496a205d4","sha256:09089178c87a05b0c3f3b22e7fd3166f0e2b9e2d62af904525b48123ce67d12f"],"state_sha256":"8abbd1106ba9439aa106088139ac540811e5c45de4ad77c9ebba14306e898243"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1lynDQPZtL7/AeeHU0GxHydD3nl06oCUf9fBi4dMZMHpH+VfAuK1Rj0WLysgfYd9DsSlTtC1pQsGXOMTwhXVCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T09:19:37.602237Z","bundle_sha256":"77b5914a77eb9b1de1b6da595329da2af505836476f708958550da02cc3fdb76"}}