{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:7WCR4POXBABUKPCYAYMB54QO75","short_pith_number":"pith:7WCR4POX","canonical_record":{"source":{"id":"1207.0308","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-02T09:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"57e30b75ede85fe969912e37f79320482c783419bf6afb604a749f033582cd54","abstract_canon_sha256":"64df4e1424cab73972508294783e8e643b1d0bd572111bac270bf588d95e8772"},"schema_version":"1.0"},"canonical_sha256":"fd851e3dd70803453c5806181ef20eff7d42050245fad03d7ebf55c85db679c7","source":{"kind":"arxiv","id":"1207.0308","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.0308","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"1207.0308v1","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.0308","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"7WCR4POXBABU","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7WCR4POXBABUKPCY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7WCR4POX","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:7WCR4POXBABUKPCYAYMB54QO75","target":"record","payload":{"canonical_record":{"source":{"id":"1207.0308","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-02T09:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"57e30b75ede85fe969912e37f79320482c783419bf6afb604a749f033582cd54","abstract_canon_sha256":"64df4e1424cab73972508294783e8e643b1d0bd572111bac270bf588d95e8772"},"schema_version":"1.0"},"canonical_sha256":"fd851e3dd70803453c5806181ef20eff7d42050245fad03d7ebf55c85db679c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:51:59.676607Z","signature_b64":"gl2cr+1G0DGDRl3xQzWO+gjaMD1hNHQvoDpu/ZC+uTVlpJZ5mjZSV7ErgOUEZr1SnezzKHZ/Iq/Z0BTZiNb2CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd851e3dd70803453c5806181ef20eff7d42050245fad03d7ebf55c85db679c7","last_reissued_at":"2026-05-18T03:51:59.675912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:51:59.675912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.0308","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":"2026-05-18T03:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x2y1iGCnTIhVuNNRGck9YC1FQdLHJKkhQ//tUWAsR4m5ZIjJb9eAJkIHYcSNrSuDl0GRlkZgU1z3RNuJy582CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T15:39:58.177867Z"},"content_sha256":"b3612468ad53e3cdd2d69ee312eeac7ef8dc8a34d8edf15ff36fcde6af3a4595","schema_version":"1.0","event_id":"sha256:b3612468ad53e3cdd2d69ee312eeac7ef8dc8a34d8edf15ff36fcde6af3a4595"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:7WCR4POXBABUKPCYAYMB54QO75","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantitative spectroscopy of Galactic BA-type supergiants. I. Atmospheric parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"M. Firnstein, N. Przybilla","submitted_at":"2012-07-02T09:00:15Z","abstract_excerpt":"BA-type supergiants show a high potential as versatile indicators for modern astronomy. The focus here is on the determination of accurate and precise atmospheric parameters for a sample of 35 Galactic BA-type supergiants. Some first applications include a recalibration of functional relationships between spectral-type, intrinsic colours, bolometric corrections and effective temperature, and an exploration of the reddening-free Johnson Q and Str\\\"omgren [c_1] and beta-indices as photometric indicators for effective temperatures and gravities of BA-type supergiants. An extensive grid of theoret"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0308","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":"2026-05-18T03:51:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2iNQtzihbr64MRuZL3QeLqrIiXwSJpAEAT5gFSx7XLvpwkeTfym1AqSo5j5zsahRplRGd3gi+I5c4QGup2lsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T15:39:58.178512Z"},"content_sha256":"89de0bdb247fa412c4fd54fab73d785f202e3bd1b4d5f905b5ebfbcdb59b0d0d","schema_version":"1.0","event_id":"sha256:89de0bdb247fa412c4fd54fab73d785f202e3bd1b4d5f905b5ebfbcdb59b0d0d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7WCR4POXBABUKPCYAYMB54QO75/bundle.json","state_url":"https://pith.science/pith/7WCR4POXBABUKPCYAYMB54QO75/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7WCR4POXBABUKPCYAYMB54QO75/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":"2026-06-08T15:39:58Z","links":{"resolver":"https://pith.science/pith/7WCR4POXBABUKPCYAYMB54QO75","bundle":"https://pith.science/pith/7WCR4POXBABUKPCYAYMB54QO75/bundle.json","state":"https://pith.science/pith/7WCR4POXBABUKPCYAYMB54QO75/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7WCR4POXBABUKPCYAYMB54QO75/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7WCR4POXBABUKPCYAYMB54QO75","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":"64df4e1424cab73972508294783e8e643b1d0bd572111bac270bf588d95e8772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-02T09:00:15Z","title_canon_sha256":"57e30b75ede85fe969912e37f79320482c783419bf6afb604a749f033582cd54"},"schema_version":"1.0","source":{"id":"1207.0308","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.0308","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"arxiv_version","alias_value":"1207.0308v1","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.0308","created_at":"2026-05-18T03:51:59Z"},{"alias_kind":"pith_short_12","alias_value":"7WCR4POXBABU","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7WCR4POXBABUKPCY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7WCR4POX","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:89de0bdb247fa412c4fd54fab73d785f202e3bd1b4d5f905b5ebfbcdb59b0d0d","target":"graph","created_at":"2026-05-18T03:51:59Z","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":"BA-type supergiants show a high potential as versatile indicators for modern astronomy. The focus here is on the determination of accurate and precise atmospheric parameters for a sample of 35 Galactic BA-type supergiants. Some first applications include a recalibration of functional relationships between spectral-type, intrinsic colours, bolometric corrections and effective temperature, and an exploration of the reddening-free Johnson Q and Str\\\"omgren [c_1] and beta-indices as photometric indicators for effective temperatures and gravities of BA-type supergiants. An extensive grid of theoret","authors_text":"M. Firnstein, N. Przybilla","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-02T09:00:15Z","title":"Quantitative spectroscopy of Galactic BA-type supergiants. I. Atmospheric parameters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.0308","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:b3612468ad53e3cdd2d69ee312eeac7ef8dc8a34d8edf15ff36fcde6af3a4595","target":"record","created_at":"2026-05-18T03:51:59Z","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":"64df4e1424cab73972508294783e8e643b1d0bd572111bac270bf588d95e8772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-02T09:00:15Z","title_canon_sha256":"57e30b75ede85fe969912e37f79320482c783419bf6afb604a749f033582cd54"},"schema_version":"1.0","source":{"id":"1207.0308","kind":"arxiv","version":1}},"canonical_sha256":"fd851e3dd70803453c5806181ef20eff7d42050245fad03d7ebf55c85db679c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd851e3dd70803453c5806181ef20eff7d42050245fad03d7ebf55c85db679c7","first_computed_at":"2026-05-18T03:51:59.675912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:51:59.675912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gl2cr+1G0DGDRl3xQzWO+gjaMD1hNHQvoDpu/ZC+uTVlpJZ5mjZSV7ErgOUEZr1SnezzKHZ/Iq/Z0BTZiNb2CA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:51:59.676607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.0308","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3612468ad53e3cdd2d69ee312eeac7ef8dc8a34d8edf15ff36fcde6af3a4595","sha256:89de0bdb247fa412c4fd54fab73d785f202e3bd1b4d5f905b5ebfbcdb59b0d0d"],"state_sha256":"da7bbf294e7477acd617ce93498f1f5a599778dec7f376b859931d11e5342fe3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GBD81BtaeaSrsfEkZ9nqd63m2YxN2KuegrA0a7NeH5WmXVbsj0mshXDcUXw67tXrZLDvWcCCDj6JaxMZi0U3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T15:39:58.182337Z","bundle_sha256":"0394c4dc62fe8a8bf696cf2de7512aeeaa8556f2d98833cc9bde73e574f8e1bc"}}