{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:FI2VZXON6Q5RBA3424X35NWTO7","short_pith_number":"pith:FI2VZXON","canonical_record":{"source":{"id":"2203.13275","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-24T18:01:14Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fadf01f7c2ddfb46866e5e32a0b8fcb5e3c478ecded8aee3ca0f887343d4e85e","abstract_canon_sha256":"6845c623163ffe1d11e7ff2a61d6a18329fbbf0171e6d9fbe243c8d412bb9f00"},"schema_version":"1.0"},"canonical_sha256":"2a355cddcdf43b10837cd72fbeb6d377f30535ea04eacfeeed27fdd6c8a8e41c","source":{"kind":"arxiv","id":"2203.13275","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.13275","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"arxiv_version","alias_value":"2203.13275v2","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.13275","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_12","alias_value":"FI2VZXON6Q5R","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_16","alias_value":"FI2VZXON6Q5RBA34","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_8","alias_value":"FI2VZXON","created_at":"2026-07-05T04:12:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:FI2VZXON6Q5RBA3424X35NWTO7","target":"record","payload":{"canonical_record":{"source":{"id":"2203.13275","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-24T18:01:14Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fadf01f7c2ddfb46866e5e32a0b8fcb5e3c478ecded8aee3ca0f887343d4e85e","abstract_canon_sha256":"6845c623163ffe1d11e7ff2a61d6a18329fbbf0171e6d9fbe243c8d412bb9f00"},"schema_version":"1.0"},"canonical_sha256":"2a355cddcdf43b10837cd72fbeb6d377f30535ea04eacfeeed27fdd6c8a8e41c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:12:29.422249Z","signature_b64":"HDnLBPwS5C4lIDj8RhEiMNQArq0yFf1CR3ZBIph/xdEh87jwyTdn2m9bFU9qbdTDbS6JoIC7vF6T4UulhB/QBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a355cddcdf43b10837cd72fbeb6d377f30535ea04eacfeeed27fdd6c8a8e41c","last_reissued_at":"2026-07-05T04:12:29.421797Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:12:29.421797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.13275","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:12:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YexiDCddsqfOIZCYkAF810DRM4XNV862XaDbicFlPxg0HaLL4ooq+yeJl1CuiOqncWuWN8lINDqLROn+7W0pDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T08:34:15.825835Z"},"content_sha256":"1acabc8480a64aa0f0e99a322e41b92960378045138c4b89d8436d1ead2f5d62","schema_version":"1.0","event_id":"sha256:1acabc8480a64aa0f0e99a322e41b92960378045138c4b89d8436d1ead2f5d62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:FI2VZXON6Q5RBA3424X35NWTO7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Dependence of Theoretical Synthetic Spectra on $\\alpha$-enhancement in Young, Binary Stellar Populations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. M. Byrne, E. R. Stanway, J. J. Eldridge, L. McSwiney, O. T. Townsend","submitted_at":"2022-03-24T18:01:14Z","abstract_excerpt":"The enhancement of $\\alpha$ elements such as oxygen is an important phase in the chemical evolution of the early Universe, with nebular material becoming enriched in these elements sooner than iron. Here we present models which incorporate stellar spectra with $\\alpha$-enhanced compositions, focusing on the impact on the integrated light of young stellar populations, including those with large binary star fractions using the Binary Populations and Spectral Synthesis (BPASS) framework, while using Solar-scaled stellar evolution models. We find that broad spectrum outputs such as production of i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.13275","kind":"arxiv","version":2},"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/2203.13275/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":"2026-07-05T04:12:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LwK7S/q71EUracFg8nUAY6uv1fYwSPADtdqrLk0BHrTfPBrOqFcSlTK/oI5fPoDLLv5eJc79cVA0BihWoZBYDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T08:34:15.826453Z"},"content_sha256":"12a051da35d8b9b74026ed2dfb770796406b78bf1ecad23304445fa09fec08fc","schema_version":"1.0","event_id":"sha256:12a051da35d8b9b74026ed2dfb770796406b78bf1ecad23304445fa09fec08fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FI2VZXON6Q5RBA3424X35NWTO7/bundle.json","state_url":"https://pith.science/pith/FI2VZXON6Q5RBA3424X35NWTO7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FI2VZXON6Q5RBA3424X35NWTO7/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":"2026-08-05T08:34:15Z","links":{"resolver":"https://pith.science/pith/FI2VZXON6Q5RBA3424X35NWTO7","bundle":"https://pith.science/pith/FI2VZXON6Q5RBA3424X35NWTO7/bundle.json","state":"https://pith.science/pith/FI2VZXON6Q5RBA3424X35NWTO7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FI2VZXON6Q5RBA3424X35NWTO7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FI2VZXON6Q5RBA3424X35NWTO7","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":"6845c623163ffe1d11e7ff2a61d6a18329fbbf0171e6d9fbe243c8d412bb9f00","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-24T18:01:14Z","title_canon_sha256":"fadf01f7c2ddfb46866e5e32a0b8fcb5e3c478ecded8aee3ca0f887343d4e85e"},"schema_version":"1.0","source":{"id":"2203.13275","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.13275","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"arxiv_version","alias_value":"2203.13275v2","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.13275","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_12","alias_value":"FI2VZXON6Q5R","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_16","alias_value":"FI2VZXON6Q5RBA34","created_at":"2026-07-05T04:12:29Z"},{"alias_kind":"pith_short_8","alias_value":"FI2VZXON","created_at":"2026-07-05T04:12:29Z"}],"graph_snapshots":[{"event_id":"sha256:12a051da35d8b9b74026ed2dfb770796406b78bf1ecad23304445fa09fec08fc","target":"graph","created_at":"2026-07-05T04:12:29Z","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/2203.13275/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The enhancement of $\\alpha$ elements such as oxygen is an important phase in the chemical evolution of the early Universe, with nebular material becoming enriched in these elements sooner than iron. Here we present models which incorporate stellar spectra with $\\alpha$-enhanced compositions, focusing on the impact on the integrated light of young stellar populations, including those with large binary star fractions using the Binary Populations and Spectral Synthesis (BPASS) framework, while using Solar-scaled stellar evolution models. We find that broad spectrum outputs such as production of i","authors_text":"C. M. Byrne, E. R. Stanway, J. J. Eldridge, L. McSwiney, O. T. Townsend","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-24T18:01:14Z","title":"The Dependence of Theoretical Synthetic Spectra on $\\alpha$-enhancement in Young, Binary Stellar Populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.13275","kind":"arxiv","version":2},"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":"sha256:1acabc8480a64aa0f0e99a322e41b92960378045138c4b89d8436d1ead2f5d62","target":"record","created_at":"2026-07-05T04:12:29Z","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":"6845c623163ffe1d11e7ff2a61d6a18329fbbf0171e6d9fbe243c8d412bb9f00","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-03-24T18:01:14Z","title_canon_sha256":"fadf01f7c2ddfb46866e5e32a0b8fcb5e3c478ecded8aee3ca0f887343d4e85e"},"schema_version":"1.0","source":{"id":"2203.13275","kind":"arxiv","version":2}},"canonical_sha256":"2a355cddcdf43b10837cd72fbeb6d377f30535ea04eacfeeed27fdd6c8a8e41c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a355cddcdf43b10837cd72fbeb6d377f30535ea04eacfeeed27fdd6c8a8e41c","first_computed_at":"2026-07-05T04:12:29.421797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:29.421797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HDnLBPwS5C4lIDj8RhEiMNQArq0yFf1CR3ZBIph/xdEh87jwyTdn2m9bFU9qbdTDbS6JoIC7vF6T4UulhB/QBA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:29.422249Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.13275","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1acabc8480a64aa0f0e99a322e41b92960378045138c4b89d8436d1ead2f5d62","sha256:12a051da35d8b9b74026ed2dfb770796406b78bf1ecad23304445fa09fec08fc"],"state_sha256":"23e8fae345b977d1750d66b81bb55f01a18457ac19408878ecc6911d9f25b188"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rgWoLhCjQrldczyMl4tMp0FlcFOMgbKZMJ+e+ACh6YuwOmgs3c5Gcs4S/E+Zf+JfUlEJThc9ha7HBZIbISqFAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T08:34:15.837034Z","bundle_sha256":"fb94fcb96597874ad8aa34651cfc5ccea6e0218f2cebada50ab9bc8dd314698f"}}