{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1996:MSPCPXK3FHTJD6I7TX5ANRS6QO","short_pith_number":"pith:MSPCPXK3","canonical_record":{"source":{"id":"astro-ph/9610063","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-10-09T21:01:27Z","cross_cats_sorted":[],"title_canon_sha256":"9c66263eccdb09f4ec8011fef1c43a37ff946378f685413fd634a420a30fffc7","abstract_canon_sha256":"5d58603ae205f46f085995aa510b6e9e61ea14b245d11d503ffd38b6cfb53749"},"schema_version":"1.0"},"canonical_sha256":"649e27dd5b29e691f91f9dfa06c65e83b92fcfcc56bfeea8d045a76363c5e84f","source":{"kind":"arxiv","id":"astro-ph/9610063","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9610063","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9610063v1","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9610063","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"pith_short_12","alias_value":"MSPCPXK3FHTJ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"MSPCPXK3FHTJD6I7","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"MSPCPXK3","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1996:MSPCPXK3FHTJD6I7TX5ANRS6QO","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9610063","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-10-09T21:01:27Z","cross_cats_sorted":[],"title_canon_sha256":"9c66263eccdb09f4ec8011fef1c43a37ff946378f685413fd634a420a30fffc7","abstract_canon_sha256":"5d58603ae205f46f085995aa510b6e9e61ea14b245d11d503ffd38b6cfb53749"},"schema_version":"1.0"},"canonical_sha256":"649e27dd5b29e691f91f9dfa06c65e83b92fcfcc56bfeea8d045a76363c5e84f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:40.704261Z","signature_b64":"Lf5mwUl7I0Pf8X1BuEfClIc4Pf2uZLTav/fJCcXLSyYPN8QecdzcOePhbx/cDsVhGp6E0xthhyNvIsCG5P11Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"649e27dd5b29e691f91f9dfa06c65e83b92fcfcc56bfeea8d045a76363c5e84f","last_reissued_at":"2026-05-18T01:07:40.703783Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:40.703783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9610063","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":"2026-05-18T01:07:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dAydXURjDTm9Jj0gND0ownFwI5HhQp8XNBP4CFiUYkhFjCSUbRTgoWHNZx2UP3cMJmKGJZuannjmWuhrBVqkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:01:30.193141Z"},"content_sha256":"bc365c84a52d9931ac818cf3760b7ce0d96c036cd030768fdc84a6d7e97d16ef","schema_version":"1.0","event_id":"sha256:bc365c84a52d9931ac818cf3760b7ce0d96c036cd030768fdc84a6d7e97d16ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1996:MSPCPXK3FHTJD6I7TX5ANRS6QO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Circumstellar C2, CN, and CH+ in the optical spectra of post-AGB stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Eric J. Bakker, Ewine F. van Dishoeck, L.B.F.M. Waters, Ton Schoenmaker","submitted_at":"1996-10-09T21:01:27Z","abstract_excerpt":"We present optical high-resolution spectra of a sample of sixteen post-AGB stars and IRC +10216. Of the post-AGB stars, ten show C2 Phillips and Swan and CN Red System absorption, one CH+ emission, one CH+ absorption, and four without any molecules. We find typically Trot=43-399, 155-202, and 18-50 K, log N = 14.90-15.57, 14.35, and 15.03-16.47 cm-2 for C2, CH+, and CN respectively, and 0.6<N(CN)/N(C2)<11.2. We did not detect isotopic lines, which places a lower limit on the isotope ratio of 12C/13C>20. The presence of C2 and CN absorption is correlated with cold dust (Tdust<300K) and the pres"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9610063","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":"2026-05-18T01:07:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+TXrxLbjiLxY7AY/X/Da+roifw7g5+gw1XODUhhEFdxZRMYQI+KWfmXjBHJUBpjK7yQiVaT1nmN0B/UoRiThAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:01:30.193558Z"},"content_sha256":"74b71f82855e2e67a3b2139107eaa24037f8b1aa60168bfb65b1f18385ab9e90","schema_version":"1.0","event_id":"sha256:74b71f82855e2e67a3b2139107eaa24037f8b1aa60168bfb65b1f18385ab9e90"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/bundle.json","state_url":"https://pith.science/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/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":"2026-05-25T13:01:30Z","links":{"resolver":"https://pith.science/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO","bundle":"https://pith.science/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/bundle.json","state":"https://pith.science/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MSPCPXK3FHTJD6I7TX5ANRS6QO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:MSPCPXK3FHTJD6I7TX5ANRS6QO","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":"5d58603ae205f46f085995aa510b6e9e61ea14b245d11d503ffd38b6cfb53749","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-10-09T21:01:27Z","title_canon_sha256":"9c66263eccdb09f4ec8011fef1c43a37ff946378f685413fd634a420a30fffc7"},"schema_version":"1.0","source":{"id":"astro-ph/9610063","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9610063","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9610063v1","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9610063","created_at":"2026-05-18T01:07:40Z"},{"alias_kind":"pith_short_12","alias_value":"MSPCPXK3FHTJ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"MSPCPXK3FHTJD6I7","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"MSPCPXK3","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:74b71f82855e2e67a3b2139107eaa24037f8b1aa60168bfb65b1f18385ab9e90","target":"graph","created_at":"2026-05-18T01:07:40Z","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 optical high-resolution spectra of a sample of sixteen post-AGB stars and IRC +10216. Of the post-AGB stars, ten show C2 Phillips and Swan and CN Red System absorption, one CH+ emission, one CH+ absorption, and four without any molecules. We find typically Trot=43-399, 155-202, and 18-50 K, log N = 14.90-15.57, 14.35, and 15.03-16.47 cm-2 for C2, CH+, and CN respectively, and 0.6<N(CN)/N(C2)<11.2. We did not detect isotopic lines, which places a lower limit on the isotope ratio of 12C/13C>20. The presence of C2 and CN absorption is correlated with cold dust (Tdust<300K) and the pres","authors_text":"Eric J. Bakker, Ewine F. van Dishoeck, L.B.F.M. Waters, Ton Schoenmaker","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1996-10-09T21:01:27Z","title":"Circumstellar C2, CN, and CH+ in the optical spectra of post-AGB stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9610063","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:bc365c84a52d9931ac818cf3760b7ce0d96c036cd030768fdc84a6d7e97d16ef","target":"record","created_at":"2026-05-18T01:07:40Z","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":"5d58603ae205f46f085995aa510b6e9e61ea14b245d11d503ffd38b6cfb53749","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-10-09T21:01:27Z","title_canon_sha256":"9c66263eccdb09f4ec8011fef1c43a37ff946378f685413fd634a420a30fffc7"},"schema_version":"1.0","source":{"id":"astro-ph/9610063","kind":"arxiv","version":1}},"canonical_sha256":"649e27dd5b29e691f91f9dfa06c65e83b92fcfcc56bfeea8d045a76363c5e84f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"649e27dd5b29e691f91f9dfa06c65e83b92fcfcc56bfeea8d045a76363c5e84f","first_computed_at":"2026-05-18T01:07:40.703783Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:40.703783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lf5mwUl7I0Pf8X1BuEfClIc4Pf2uZLTav/fJCcXLSyYPN8QecdzcOePhbx/cDsVhGp6E0xthhyNvIsCG5P11Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:40.704261Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9610063","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc365c84a52d9931ac818cf3760b7ce0d96c036cd030768fdc84a6d7e97d16ef","sha256:74b71f82855e2e67a3b2139107eaa24037f8b1aa60168bfb65b1f18385ab9e90"],"state_sha256":"124f28b9e182ebfbb8cd544e4fde962af983b23171aaee0f1856831dd5b12807"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yZCrU/bKBvRuvPZ+F38eQLiM3a4FTu4un9RiKtqe/FmyC95nlSdYT4wyN46rIWjs8fxw8Fqbu+HwCRWAWzGXBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:01:30.196446Z","bundle_sha256":"3fdf1171610ed4034492a6aabf2ffba96c18093a7c12516fca077fbb3d819517"}}