{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:EG5PQ4TYLXKPZ7PUWA32XYK7FJ","short_pith_number":"pith:EG5PQ4TY","canonical_record":{"source":{"id":"1707.01916","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-06T18:01:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"59e564a7238a2aad1ce710958bdb93c3d5699431528304d689db7e6dfb03100a","abstract_canon_sha256":"44e4b38b1c9a47c509812b1634b1e43b96cb79ec6541bbe5846be9b6279bb98a"},"schema_version":"1.0"},"canonical_sha256":"21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d","source":{"kind":"arxiv","id":"1707.01916","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.01916","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"arxiv_version","alias_value":"1707.01916v1","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.01916","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"pith_short_12","alias_value":"EG5PQ4TYLXKP","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EG5PQ4TYLXKPZ7PU","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EG5PQ4TY","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:EG5PQ4TYLXKPZ7PUWA32XYK7FJ","target":"record","payload":{"canonical_record":{"source":{"id":"1707.01916","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-06T18:01:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"59e564a7238a2aad1ce710958bdb93c3d5699431528304d689db7e6dfb03100a","abstract_canon_sha256":"44e4b38b1c9a47c509812b1634b1e43b96cb79ec6541bbe5846be9b6279bb98a"},"schema_version":"1.0"},"canonical_sha256":"21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:31.014617Z","signature_b64":"I+3N0nz/KqgyEYAcPiZrd46OEZxDRdr/SABmlcNzN3UygpzvTngLX3eGCagGIh+s9oCdF6tEjigBYjBcUa5DAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d","last_reissued_at":"2026-05-18T00:39:31.014076Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:31.014076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.01916","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":"2026-05-18T00:39:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UQe4wpr7H0L7BWDViO/2LzkCgSyNKFaDt1lBRA5As0QOzYa5eyvgSGE/tjjElkNF2KWvGFy4bhbAEWF+1yheBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T09:40:42.309592Z"},"content_sha256":"5f52feb2d410f9eb62288a36b49d3e8e58ba98d91522becb8b74dd8fac6c813e","schema_version":"1.0","event_id":"sha256:5f52feb2d410f9eb62288a36b49d3e8e58ba98d91522becb8b74dd8fac6c813e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:EG5PQ4TYLXKPZ7PUWA32XYK7FJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Luminous and Variable Stars in M31 and M33 V. The Upper HR Diagram","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"David Hahn, John C. Martin, Kerstin Weis, Kris Davidson, Roberta M. Humphreys","submitted_at":"2017-07-06T18:01:07Z","abstract_excerpt":"We present HR Diagrams for the massive star populations in M31 and M33 including several different types of emission-line stars: the confirmed Luminous Blue Variables (LBVs), candidate LBVs, B[e] supergiants and the warm hypergiants. We estimate their apparent temperatures and luminosities for comparison with their respective massive star populations and to evaluate the possible relationships of these different classes of evolved, massive stars, and their evolutionary state. Several of the LBV candidates lie near the LBV/S Dor instability strip which supports their classification. Most of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.01916","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":""},"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":"2026-05-18T00:39:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wtb+qZPfcQphD2ZJhu2QRK2yaxessA0lnpG2F6OV/UXcSrKKGDG1TupAcyY5vP4Og24OxUysfhZQJy+EpEd1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T09:40:42.310170Z"},"content_sha256":"4c98a1417788db76dc46da70bf6bce07cf3269dc625ecd8a82da2d826676b1a7","schema_version":"1.0","event_id":"sha256:4c98a1417788db76dc46da70bf6bce07cf3269dc625ecd8a82da2d826676b1a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/bundle.json","state_url":"https://pith.science/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/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":"2026-05-21T09:40:42Z","links":{"resolver":"https://pith.science/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ","bundle":"https://pith.science/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/bundle.json","state":"https://pith.science/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EG5PQ4TYLXKPZ7PUWA32XYK7FJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:EG5PQ4TYLXKPZ7PUWA32XYK7FJ","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":"44e4b38b1c9a47c509812b1634b1e43b96cb79ec6541bbe5846be9b6279bb98a","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-06T18:01:07Z","title_canon_sha256":"59e564a7238a2aad1ce710958bdb93c3d5699431528304d689db7e6dfb03100a"},"schema_version":"1.0","source":{"id":"1707.01916","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.01916","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"arxiv_version","alias_value":"1707.01916v1","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.01916","created_at":"2026-05-18T00:39:31Z"},{"alias_kind":"pith_short_12","alias_value":"EG5PQ4TYLXKP","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EG5PQ4TYLXKPZ7PU","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EG5PQ4TY","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:4c98a1417788db76dc46da70bf6bce07cf3269dc625ecd8a82da2d826676b1a7","target":"graph","created_at":"2026-05-18T00:39:31Z","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"},"paper":{"abstract_excerpt":"We present HR Diagrams for the massive star populations in M31 and M33 including several different types of emission-line stars: the confirmed Luminous Blue Variables (LBVs), candidate LBVs, B[e] supergiants and the warm hypergiants. We estimate their apparent temperatures and luminosities for comparison with their respective massive star populations and to evaluate the possible relationships of these different classes of evolved, massive stars, and their evolutionary state. Several of the LBV candidates lie near the LBV/S Dor instability strip which supports their classification. Most of the ","authors_text":"David Hahn, John C. Martin, Kerstin Weis, Kris Davidson, Roberta M. Humphreys","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-06T18:01:07Z","title":"Luminous and Variable Stars in M31 and M33 V. The Upper HR Diagram"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.01916","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":"sha256:5f52feb2d410f9eb62288a36b49d3e8e58ba98d91522becb8b74dd8fac6c813e","target":"record","created_at":"2026-05-18T00:39:31Z","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":"44e4b38b1c9a47c509812b1634b1e43b96cb79ec6541bbe5846be9b6279bb98a","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-07-06T18:01:07Z","title_canon_sha256":"59e564a7238a2aad1ce710958bdb93c3d5699431528304d689db7e6dfb03100a"},"schema_version":"1.0","source":{"id":"1707.01916","kind":"arxiv","version":1}},"canonical_sha256":"21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21baf872785dd4fcfdf4b037abe15f2a5983064a3468215edd41ba81bfbc0a3d","first_computed_at":"2026-05-18T00:39:31.014076Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:31.014076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I+3N0nz/KqgyEYAcPiZrd46OEZxDRdr/SABmlcNzN3UygpzvTngLX3eGCagGIh+s9oCdF6tEjigBYjBcUa5DAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:31.014617Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.01916","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5f52feb2d410f9eb62288a36b49d3e8e58ba98d91522becb8b74dd8fac6c813e","sha256:4c98a1417788db76dc46da70bf6bce07cf3269dc625ecd8a82da2d826676b1a7"],"state_sha256":"acf65a03a81a04265d198d795ca19fa8a3f50599de5cf44117650dd99375ec59"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pC6iAGtixtImeGgG7QqMtN2vkJ/nypqYjfie8ERLXjcslZjJgQfFNuuWx182QT9HYrD6m8vGpHMrPu0bSZs9CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T09:40:42.313029Z","bundle_sha256":"698a8eefaa5acb5b10c0cf106486babde40931a14646bd7871bc4dd7afd45f97"}}