{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:DCTCFRGWS2EDNCLN4BMGTMTO7O","short_pith_number":"pith:DCTCFRGW","canonical_record":{"source":{"id":"1209.3778","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-17T20:00:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"cf7f0b8c0ff904d6400f00c3cd972d927934cbe3488b4c2760f73ce1fa19df6a","abstract_canon_sha256":"014cbd853a3ab3ca52a1ede664d90ae2464fe824e99f06bbb66bd31bafd32754"},"schema_version":"1.0"},"canonical_sha256":"18a622c4d6968836896de05869b26efbbfcf4816a6e71f2fa67bf46a9edfe0f0","source":{"kind":"arxiv","id":"1209.3778","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3778","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3778v2","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3778","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"DCTCFRGWS2ED","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"DCTCFRGWS2EDNCLN","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"DCTCFRGW","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:DCTCFRGWS2EDNCLN4BMGTMTO7O","target":"record","payload":{"canonical_record":{"source":{"id":"1209.3778","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-17T20:00:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"cf7f0b8c0ff904d6400f00c3cd972d927934cbe3488b4c2760f73ce1fa19df6a","abstract_canon_sha256":"014cbd853a3ab3ca52a1ede664d90ae2464fe824e99f06bbb66bd31bafd32754"},"schema_version":"1.0"},"canonical_sha256":"18a622c4d6968836896de05869b26efbbfcf4816a6e71f2fa67bf46a9edfe0f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:41:12.232858Z","signature_b64":"PmHb7PXfr7dYAcGAs/0P84NC0yROF/vqVJ63dRQlafnSkFlOGSF62/lmBBN0Ag5rxrchALoMqxK3wvbOzhmnBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18a622c4d6968836896de05869b26efbbfcf4816a6e71f2fa67bf46a9edfe0f0","last_reissued_at":"2026-05-18T03:41:12.232372Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:41:12.232372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.3778","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":"2026-05-18T03:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6HzWY4Dd1vFf817cJgbtJ0WSZE/+SEz2NBS65Mbq8uWUR6YE28I3ahFng68ytr4h54mYFjghWW+ELDzDCGjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:08:40.400529Z"},"content_sha256":"e2c3ed1a506b8850144cb7fedd4d6be9b1bfd936e6a48121f60c899f864b899f","schema_version":"1.0","event_id":"sha256:e2c3ed1a506b8850144cb7fedd4d6be9b1bfd936e6a48121f60c899f864b899f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:DCTCFRGWS2EDNCLN4BMGTMTO7O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detailed Abundances of Two Very Metal-Poor Stars in Dwarf Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Evan N. Kirby, Judith G. Cohen (Caltech)","submitted_at":"2012-09-17T20:00:14Z","abstract_excerpt":"The most metal-poor stars in dwarf spheroidal galaxies (dSphs) can show the nucleosynthetic patterns of one or a few supernovae. These supernovae could have zero metallicity, making metal-poor dSph stars the closest surviving links to Population III stars. Metal-poor dSph stars also help to reveal the formation mechanism of the Milky Way halo. We present the detailed abundances from Keck/HIRES spectroscopy for two very metal-poor stars in two Milky Way dSphs. One star, in the Sculptor dSph, has [Fe I/H] = -2.40. The other star, in the Ursa Minor dSph, has [Fe I/H] = -3.16. Both stars fall in t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3778","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":""},"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":"2026-05-18T03:41:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u0IryCcr2GyCooQCz545EuvUVD2qt0anD7aHNZ3rVhtCAb3iwqIAK3D2zL+S54oX7n1EObrGBdM8YJ/j62yeAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:08:40.400878Z"},"content_sha256":"47186f5ed5bd7637f607f6291737c5d9826e8ce2858b4f80cae3f395f8340e7e","schema_version":"1.0","event_id":"sha256:47186f5ed5bd7637f607f6291737c5d9826e8ce2858b4f80cae3f395f8340e7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/bundle.json","state_url":"https://pith.science/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/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":"2026-07-07T07:08:40Z","links":{"resolver":"https://pith.science/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O","bundle":"https://pith.science/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/bundle.json","state":"https://pith.science/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DCTCFRGWS2EDNCLN4BMGTMTO7O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:DCTCFRGWS2EDNCLN4BMGTMTO7O","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":"014cbd853a3ab3ca52a1ede664d90ae2464fe824e99f06bbb66bd31bafd32754","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-17T20:00:14Z","title_canon_sha256":"cf7f0b8c0ff904d6400f00c3cd972d927934cbe3488b4c2760f73ce1fa19df6a"},"schema_version":"1.0","source":{"id":"1209.3778","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3778","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3778v2","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3778","created_at":"2026-05-18T03:41:12Z"},{"alias_kind":"pith_short_12","alias_value":"DCTCFRGWS2ED","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"DCTCFRGWS2EDNCLN","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"DCTCFRGW","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:47186f5ed5bd7637f607f6291737c5d9826e8ce2858b4f80cae3f395f8340e7e","target":"graph","created_at":"2026-05-18T03:41:12Z","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 most metal-poor stars in dwarf spheroidal galaxies (dSphs) can show the nucleosynthetic patterns of one or a few supernovae. These supernovae could have zero metallicity, making metal-poor dSph stars the closest surviving links to Population III stars. Metal-poor dSph stars also help to reveal the formation mechanism of the Milky Way halo. We present the detailed abundances from Keck/HIRES spectroscopy for two very metal-poor stars in two Milky Way dSphs. One star, in the Sculptor dSph, has [Fe I/H] = -2.40. The other star, in the Ursa Minor dSph, has [Fe I/H] = -3.16. Both stars fall in t","authors_text":"Evan N. Kirby, Judith G. Cohen (Caltech)","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-17T20:00:14Z","title":"Detailed Abundances of Two Very Metal-Poor Stars in Dwarf Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3778","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:e2c3ed1a506b8850144cb7fedd4d6be9b1bfd936e6a48121f60c899f864b899f","target":"record","created_at":"2026-05-18T03:41:12Z","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":"014cbd853a3ab3ca52a1ede664d90ae2464fe824e99f06bbb66bd31bafd32754","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-17T20:00:14Z","title_canon_sha256":"cf7f0b8c0ff904d6400f00c3cd972d927934cbe3488b4c2760f73ce1fa19df6a"},"schema_version":"1.0","source":{"id":"1209.3778","kind":"arxiv","version":2}},"canonical_sha256":"18a622c4d6968836896de05869b26efbbfcf4816a6e71f2fa67bf46a9edfe0f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18a622c4d6968836896de05869b26efbbfcf4816a6e71f2fa67bf46a9edfe0f0","first_computed_at":"2026-05-18T03:41:12.232372Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:41:12.232372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PmHb7PXfr7dYAcGAs/0P84NC0yROF/vqVJ63dRQlafnSkFlOGSF62/lmBBN0Ag5rxrchALoMqxK3wvbOzhmnBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:41:12.232858Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.3778","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2c3ed1a506b8850144cb7fedd4d6be9b1bfd936e6a48121f60c899f864b899f","sha256:47186f5ed5bd7637f607f6291737c5d9826e8ce2858b4f80cae3f395f8340e7e"],"state_sha256":"f1894510cf27fed680387a26ebbabc572d6f45d0a1d7dd24a2ee3ee5c281732f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3WQCM0dQtgLsYf/NO7iCLcC5bU+/P9pqYKA+FqDM4Uz1GN1bbaZxoxDORszQyHA6EX7+vsJns2Wnj1L01dnIBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T07:08:40.404885Z","bundle_sha256":"fe4a035ba37cc71864d48b9a924c9a561a18531f7a97777b3b97fb69794d8423"}}