{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:JC6RJ736SAFWLLGMBN2QP5LEZZ","short_pith_number":"pith:JC6RJ736","canonical_record":{"source":{"id":"2506.16071","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-19T06:54:20Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c8f460b1a32aff896ab878f6c27fb4576f5fafcfcdd381891f4ca1af05d0e4e6","abstract_canon_sha256":"e3be5079c087cf228eb374c50871016a32f0bb949ae3b1b985a04d373a82dc47"},"schema_version":"1.0"},"canonical_sha256":"48bd14ff7e900b65accc0b7507f564ce5e62da6e626a30f5b1915035c611dde2","source":{"kind":"arxiv","id":"2506.16071","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.16071","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"arxiv_version","alias_value":"2506.16071v1","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.16071","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_12","alias_value":"JC6RJ736SAFW","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_16","alias_value":"JC6RJ736SAFWLLGM","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_8","alias_value":"JC6RJ736","created_at":"2026-07-05T11:24:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:JC6RJ736SAFWLLGMBN2QP5LEZZ","target":"record","payload":{"canonical_record":{"source":{"id":"2506.16071","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-19T06:54:20Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c8f460b1a32aff896ab878f6c27fb4576f5fafcfcdd381891f4ca1af05d0e4e6","abstract_canon_sha256":"e3be5079c087cf228eb374c50871016a32f0bb949ae3b1b985a04d373a82dc47"},"schema_version":"1.0"},"canonical_sha256":"48bd14ff7e900b65accc0b7507f564ce5e62da6e626a30f5b1915035c611dde2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:24:29.875322Z","signature_b64":"aD8oF++F6jSQ34PiHbkxxZMaNnzKRKfSWwrkE+ACEun9z4244GsM/g59RvOyWBfGApOqU47NqgRyzR0wexahCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48bd14ff7e900b65accc0b7507f564ce5e62da6e626a30f5b1915035c611dde2","last_reissued_at":"2026-07-05T11:24:29.874829Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:24:29.874829Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.16071","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":"2026-07-05T11:24:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YuUnW/QgR4ghY85NQtQHfiAxN2fKpCzpkoWSHXrtaDMSbRRKWxBfnyzsy8UeEMxcsLo0Z+u+z8jnL/SaftUnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:20:41.329342Z"},"content_sha256":"2acecac43c04944ec81aca73def21e60fc594f4942b41fdd98ad62d4fbd64952","schema_version":"1.0","event_id":"sha256:2acecac43c04944ec81aca73def21e60fc594f4942b41fdd98ad62d4fbd64952"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:JC6RJ736SAFWLLGMBN2QP5LEZZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Massive Yellow Supergiant in the Far Outer Disk of M31: Evidence for In Situ Massive Star Formation Beyond the Optical Radius","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Bingqiu Chen, Chao-Wei Tsai, Haibo Yuan, Kai Zhang, Pinjian Chen, Xiaodian Chen, Xiaowei Liu, Xuan Fang","submitted_at":"2025-06-19T06:54:20Z","abstract_excerpt":"While massive stars are known to shape galactic ecosystems, their formation has long been assumed to require the high-density environments of inner galactic disks. This paradigm is challenged by mounting evidence of young massive stars in extended galaxy outskirts, yet direct confirmation of in situ massive star formation in such extreme low-density environments remains scarce. Here, we present the discovery of LAMOST J0048+4154, a massive yellow supergiant situated at a deprojected galactocentric distance of ~34 kpc in M31, making it the most distant massive star confirmed in this galaxy. Thr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.16071","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/2506.16071/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":"2026-07-05T11:24:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mCJeDKxVxz1unQ04lr1Y2k+iLHBa2raCdXQYYmLU6X9HhUVx5bQ+Hg8rIvlJmoHERIhK/i8Ij5vrRQBuYxuIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:20:41.330005Z"},"content_sha256":"4ba15d29d38d96b23466467150dca0bb4aeffe487e29834e30a34b67d845fd2c","schema_version":"1.0","event_id":"sha256:4ba15d29d38d96b23466467150dca0bb4aeffe487e29834e30a34b67d845fd2c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/bundle.json","state_url":"https://pith.science/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/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":"2026-08-12T19:20:41Z","links":{"resolver":"https://pith.science/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ","bundle":"https://pith.science/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/bundle.json","state":"https://pith.science/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JC6RJ736SAFWLLGMBN2QP5LEZZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:JC6RJ736SAFWLLGMBN2QP5LEZZ","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":"e3be5079c087cf228eb374c50871016a32f0bb949ae3b1b985a04d373a82dc47","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-19T06:54:20Z","title_canon_sha256":"c8f460b1a32aff896ab878f6c27fb4576f5fafcfcdd381891f4ca1af05d0e4e6"},"schema_version":"1.0","source":{"id":"2506.16071","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.16071","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"arxiv_version","alias_value":"2506.16071v1","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.16071","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_12","alias_value":"JC6RJ736SAFW","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_16","alias_value":"JC6RJ736SAFWLLGM","created_at":"2026-07-05T11:24:29Z"},{"alias_kind":"pith_short_8","alias_value":"JC6RJ736","created_at":"2026-07-05T11:24:29Z"}],"graph_snapshots":[{"event_id":"sha256:4ba15d29d38d96b23466467150dca0bb4aeffe487e29834e30a34b67d845fd2c","target":"graph","created_at":"2026-07-05T11:24:29Z","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/2506.16071/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"While massive stars are known to shape galactic ecosystems, their formation has long been assumed to require the high-density environments of inner galactic disks. This paradigm is challenged by mounting evidence of young massive stars in extended galaxy outskirts, yet direct confirmation of in situ massive star formation in such extreme low-density environments remains scarce. Here, we present the discovery of LAMOST J0048+4154, a massive yellow supergiant situated at a deprojected galactocentric distance of ~34 kpc in M31, making it the most distant massive star confirmed in this galaxy. Thr","authors_text":"Bingqiu Chen, Chao-Wei Tsai, Haibo Yuan, Kai Zhang, Pinjian Chen, Xiaodian Chen, Xiaowei Liu, Xuan Fang","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-19T06:54:20Z","title":"A Massive Yellow Supergiant in the Far Outer Disk of M31: Evidence for In Situ Massive Star Formation Beyond the Optical Radius"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.16071","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":"sha256:2acecac43c04944ec81aca73def21e60fc594f4942b41fdd98ad62d4fbd64952","target":"record","created_at":"2026-07-05T11:24:29Z","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":"e3be5079c087cf228eb374c50871016a32f0bb949ae3b1b985a04d373a82dc47","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-19T06:54:20Z","title_canon_sha256":"c8f460b1a32aff896ab878f6c27fb4576f5fafcfcdd381891f4ca1af05d0e4e6"},"schema_version":"1.0","source":{"id":"2506.16071","kind":"arxiv","version":1}},"canonical_sha256":"48bd14ff7e900b65accc0b7507f564ce5e62da6e626a30f5b1915035c611dde2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48bd14ff7e900b65accc0b7507f564ce5e62da6e626a30f5b1915035c611dde2","first_computed_at":"2026-07-05T11:24:29.874829Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:24:29.874829Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aD8oF++F6jSQ34PiHbkxxZMaNnzKRKfSWwrkE+ACEun9z4244GsM/g59RvOyWBfGApOqU47NqgRyzR0wexahCw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:24:29.875322Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.16071","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2acecac43c04944ec81aca73def21e60fc594f4942b41fdd98ad62d4fbd64952","sha256:4ba15d29d38d96b23466467150dca0bb4aeffe487e29834e30a34b67d845fd2c"],"state_sha256":"ffe1c42bec510b8c4c65be399186f0dc910c7b708049d1568d7bcec6e57bd5d1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bYRhwEi0/ABb3S7q5H1AMajyEKQUxrOM67fbERK3FfNWs3Dv8Uzjv8MTcqRH0n6bS1FjvnGIOGkQNAfSUQEWDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T19:20:41.335189Z","bundle_sha256":"00ad35dcc49bedb1a3e4cf082a55abfebb15b06fcb9d6a20e8e583de54b37828"}}