{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:U27EYNYXIR2UPXDLBAMGVM62AZ","short_pith_number":"pith:U27EYNYX","canonical_record":{"source":{"id":"1201.5192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-01-25T06:32:16Z","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"title_canon_sha256":"a6a2c2613a70a83b3adf0db2773adfc2e1484dc69cfca7e3c258e32367159f9c","abstract_canon_sha256":"9ec13187e06cf0dca8f386b523e4b0f25893110d5f91c4ed50b409d2e6dde40d"},"schema_version":"1.0"},"canonical_sha256":"a6be4c3717447547dc6b08186ab3da0652529678a6df7a27e40cf5f69b081c5e","source":{"kind":"arxiv","id":"1201.5192","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5192","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5192v1","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5192","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"pith_short_12","alias_value":"U27EYNYXIR2U","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"U27EYNYXIR2UPXDL","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"U27EYNYX","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:U27EYNYXIR2UPXDLBAMGVM62AZ","target":"record","payload":{"canonical_record":{"source":{"id":"1201.5192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-01-25T06:32:16Z","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"title_canon_sha256":"a6a2c2613a70a83b3adf0db2773adfc2e1484dc69cfca7e3c258e32367159f9c","abstract_canon_sha256":"9ec13187e06cf0dca8f386b523e4b0f25893110d5f91c4ed50b409d2e6dde40d"},"schema_version":"1.0"},"canonical_sha256":"a6be4c3717447547dc6b08186ab3da0652529678a6df7a27e40cf5f69b081c5e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:42.263523Z","signature_b64":"1LTa+8eD1eJy/3Orv4SHV4qOXNB0LuhgFRJggQtH7romzakEHuu5mdlx4ZxzJ4PD3CLIfM+oku5niJvLhP2fDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6be4c3717447547dc6b08186ab3da0652529678a6df7a27e40cf5f69b081c5e","last_reissued_at":"2026-05-18T01:58:42.262873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:42.262873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.5192","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":"2026-05-18T01:58:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9rKS2m8cDuzOf4tioTcawN08sG29TaabhJ5WhXvQVBWdfv+Yz+WcXeS6kWubPqIYGmUkpCA3tRYqJ16WnDSnDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:30:48.787932Z"},"content_sha256":"2258656a4de989b4243b33b8b464ba3bf22b9efedb18800546b56a5fc94d6e5b","schema_version":"1.0","event_id":"sha256:2258656a4de989b4243b33b8b464ba3bf22b9efedb18800546b56a5fc94d6e5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:U27EYNYXIR2UPXDLBAMGVM62AZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Planetary Nebula Populations and Kinematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Michael G. Richer","submitted_at":"2012-01-25T06:32:16Z","abstract_excerpt":"The brightest planetary nebulae achieve similar maximum luminosities, have similar ratios of chemcial abundances, and apparently share similar kinematics in all galaxies. These similarities, however, are not necessarily expected theoretically and appear to hide important evolutionary differences. As predicted theoretically, metallicity appears to affect nebular kinematics, if subtly, and there is a clear variation with evolutionary stage. To the extent that it can be investigated, the internal kinematics for galactic and extragalactic planetary nebulae are similar. The extragalactic planetary "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5192","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":"2026-05-18T01:58:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y06iMqqESkI5Mxm5lwo7ssRTjP/aDFQ+pi8eNoBXp3Rgveif6416E+9sc8Dh8x76njjjXLEmLEphMav7VP0NAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:30:48.788607Z"},"content_sha256":"c0b5499401fbe20887d48c283f97779ed8c6d7e45b090c418ca4b6beeff04346","schema_version":"1.0","event_id":"sha256:c0b5499401fbe20887d48c283f97779ed8c6d7e45b090c418ca4b6beeff04346"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/bundle.json","state_url":"https://pith.science/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/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":"2026-06-09T10:30:48Z","links":{"resolver":"https://pith.science/pith/U27EYNYXIR2UPXDLBAMGVM62AZ","bundle":"https://pith.science/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/bundle.json","state":"https://pith.science/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U27EYNYXIR2UPXDLBAMGVM62AZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:U27EYNYXIR2UPXDLBAMGVM62AZ","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":"9ec13187e06cf0dca8f386b523e4b0f25893110d5f91c4ed50b409d2e6dde40d","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-01-25T06:32:16Z","title_canon_sha256":"a6a2c2613a70a83b3adf0db2773adfc2e1484dc69cfca7e3c258e32367159f9c"},"schema_version":"1.0","source":{"id":"1201.5192","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5192","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5192v1","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5192","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"pith_short_12","alias_value":"U27EYNYXIR2U","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"U27EYNYXIR2UPXDL","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"U27EYNYX","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:c0b5499401fbe20887d48c283f97779ed8c6d7e45b090c418ca4b6beeff04346","target":"graph","created_at":"2026-05-18T01:58:42Z","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":"The brightest planetary nebulae achieve similar maximum luminosities, have similar ratios of chemcial abundances, and apparently share similar kinematics in all galaxies. These similarities, however, are not necessarily expected theoretically and appear to hide important evolutionary differences. As predicted theoretically, metallicity appears to affect nebular kinematics, if subtly, and there is a clear variation with evolutionary stage. To the extent that it can be investigated, the internal kinematics for galactic and extragalactic planetary nebulae are similar. The extragalactic planetary ","authors_text":"Michael G. Richer","cross_cats":["astro-ph.CO","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-01-25T06:32:16Z","title":"Planetary Nebula Populations and Kinematics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5192","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":"sha256:2258656a4de989b4243b33b8b464ba3bf22b9efedb18800546b56a5fc94d6e5b","target":"record","created_at":"2026-05-18T01:58:42Z","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":"9ec13187e06cf0dca8f386b523e4b0f25893110d5f91c4ed50b409d2e6dde40d","cross_cats_sorted":["astro-ph.CO","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-01-25T06:32:16Z","title_canon_sha256":"a6a2c2613a70a83b3adf0db2773adfc2e1484dc69cfca7e3c258e32367159f9c"},"schema_version":"1.0","source":{"id":"1201.5192","kind":"arxiv","version":1}},"canonical_sha256":"a6be4c3717447547dc6b08186ab3da0652529678a6df7a27e40cf5f69b081c5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6be4c3717447547dc6b08186ab3da0652529678a6df7a27e40cf5f69b081c5e","first_computed_at":"2026-05-18T01:58:42.262873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:42.262873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1LTa+8eD1eJy/3Orv4SHV4qOXNB0LuhgFRJggQtH7romzakEHuu5mdlx4ZxzJ4PD3CLIfM+oku5niJvLhP2fDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:42.263523Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.5192","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2258656a4de989b4243b33b8b464ba3bf22b9efedb18800546b56a5fc94d6e5b","sha256:c0b5499401fbe20887d48c283f97779ed8c6d7e45b090c418ca4b6beeff04346"],"state_sha256":"cfc774b340d1e11fc6cfe7e2b33234348227fab2aa7488d9d9a01c97fadcfa61"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"USpLxCsihOmkMaErI8PzrS/ZFj3PMZSMDsKmTUZJ6OeZJvUzulsYrlFcCkWZ7+sbDVkh+LoCwq1a/iuWwsjADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T10:30:48.792624Z","bundle_sha256":"fffa4598583e46424aead3da2e87f41e3c4bc2e6eaaac836323d15b301c1cd79"}}