{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:ZAUOLB7UXNTV5K5YUNLCU3HCFX","short_pith_number":"pith:ZAUOLB7U","canonical_record":{"source":{"id":"0810.5247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-29T11:20:27Z","cross_cats_sorted":[],"title_canon_sha256":"e4a5d04efc50b9414d0a826c3e6d5a92f686598fad18b3127480830edae19b5b","abstract_canon_sha256":"325372a47096c599915c9079cf116e1b0db17bfc9ec6e6d48b8c9b8b5284f04f"},"schema_version":"1.0"},"canonical_sha256":"c828e587f4bb675eabb8a3562a6ce22ddd0808c3ad849cc9c1461e0fe00b14ca","source":{"kind":"arxiv","id":"0810.5247","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.5247","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"arxiv_version","alias_value":"0810.5247v1","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.5247","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_12","alias_value":"ZAUOLB7UXNTV","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_16","alias_value":"ZAUOLB7UXNTV5K5Y","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_8","alias_value":"ZAUOLB7U","created_at":"2026-07-04T17:13:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:ZAUOLB7UXNTV5K5YUNLCU3HCFX","target":"record","payload":{"canonical_record":{"source":{"id":"0810.5247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-29T11:20:27Z","cross_cats_sorted":[],"title_canon_sha256":"e4a5d04efc50b9414d0a826c3e6d5a92f686598fad18b3127480830edae19b5b","abstract_canon_sha256":"325372a47096c599915c9079cf116e1b0db17bfc9ec6e6d48b8c9b8b5284f04f"},"schema_version":"1.0"},"canonical_sha256":"c828e587f4bb675eabb8a3562a6ce22ddd0808c3ad849cc9c1461e0fe00b14ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:13:22.943660Z","signature_b64":"iRoOaLYeU1A+YPIRMwqP2Kmh+Ub1AcZxszIZHaOQJ5kH+6H/mPhI4ptCIF4tLycE4xfkYdb3Tc01SdozxYT9AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c828e587f4bb675eabb8a3562a6ce22ddd0808c3ad849cc9c1461e0fe00b14ca","last_reissued_at":"2026-07-04T17:13:22.943276Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:13:22.943276Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.5247","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":"2026-07-04T17:13:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e5mF5Rr/ng/tPjtPvV7QBipNwBZlA7qh8+Mrx87YTj6csv842FYtaeWYL5EQ0vUepJ3dP/ra1rybLq7g+hq+Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:50:00.048568Z"},"content_sha256":"48b96edd505ecbe9b906572d4e1c3c014ee7e0e9c4fafff7352587e2751e8e10","schema_version":"1.0","event_id":"sha256:48b96edd505ecbe9b906572d4e1c3c014ee7e0e9c4fafff7352587e2751e8e10"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:ZAUOLB7UXNTV5K5YUNLCU3HCFX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Granulation in K-type Dwarf Stars. I. Spectroscopic observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Allende Prieto, Department of Astronomy, D. L. Lambert (McDonald Observatory, I. Ramirez, University of Texas at Austin)","submitted_at":"2008-10-29T11:20:27Z","abstract_excerpt":"Very high resolution (R~160,000-210,000), high signal-to-noise ratio (S/N>300) spectra of nine bright K-dwarfs were obtained with the 2dcoude spectrograph on the 2.7m Telescope at McDonald Observatory to determine wavelength shifts and asymmetries of Fe I lines. The observed shapes and positions of Fe I lines reveal asymmetries and wavelength shifts that indicate the presence of granulation. In particular, line bisectors show characteristic C-shapes while line core wavelengths are blueshifted by an amount that increases with decreasing equivalent width (EW). On average, Fe I line bisectors hav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.5247","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0810.5247/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":"2026-07-04T17:13:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oA+yk8H3Qj4GI+lIAVyyx2+U1i4yhrUK0DppDqzqwpzDX7mA8iyj+HrtkbE64PeOEKaQi4LPQ/QZwL4aq6AFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:50:00.049065Z"},"content_sha256":"3689ede334f3474f3e382056306a4f3252d921a66c165731206330bb6ea8d3d0","schema_version":"1.0","event_id":"sha256:3689ede334f3474f3e382056306a4f3252d921a66c165731206330bb6ea8d3d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/bundle.json","state_url":"https://pith.science/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/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":"2026-08-05T19:50:00Z","links":{"resolver":"https://pith.science/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX","bundle":"https://pith.science/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/bundle.json","state":"https://pith.science/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZAUOLB7UXNTV5K5YUNLCU3HCFX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:ZAUOLB7UXNTV5K5YUNLCU3HCFX","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":"325372a47096c599915c9079cf116e1b0db17bfc9ec6e6d48b8c9b8b5284f04f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-29T11:20:27Z","title_canon_sha256":"e4a5d04efc50b9414d0a826c3e6d5a92f686598fad18b3127480830edae19b5b"},"schema_version":"1.0","source":{"id":"0810.5247","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.5247","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"arxiv_version","alias_value":"0810.5247v1","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.5247","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_12","alias_value":"ZAUOLB7UXNTV","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_16","alias_value":"ZAUOLB7UXNTV5K5Y","created_at":"2026-07-04T17:13:22Z"},{"alias_kind":"pith_short_8","alias_value":"ZAUOLB7U","created_at":"2026-07-04T17:13:22Z"}],"graph_snapshots":[{"event_id":"sha256:3689ede334f3474f3e382056306a4f3252d921a66c165731206330bb6ea8d3d0","target":"graph","created_at":"2026-07-04T17:13:22Z","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/0810.5247/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Very high resolution (R~160,000-210,000), high signal-to-noise ratio (S/N>300) spectra of nine bright K-dwarfs were obtained with the 2dcoude spectrograph on the 2.7m Telescope at McDonald Observatory to determine wavelength shifts and asymmetries of Fe I lines. The observed shapes and positions of Fe I lines reveal asymmetries and wavelength shifts that indicate the presence of granulation. In particular, line bisectors show characteristic C-shapes while line core wavelengths are blueshifted by an amount that increases with decreasing equivalent width (EW). On average, Fe I line bisectors hav","authors_text":"C. Allende Prieto, Department of Astronomy, D. L. Lambert (McDonald Observatory, I. Ramirez, University of Texas at Austin)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-29T11:20:27Z","title":"Granulation in K-type Dwarf Stars. I. Spectroscopic observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.5247","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":"sha256:48b96edd505ecbe9b906572d4e1c3c014ee7e0e9c4fafff7352587e2751e8e10","target":"record","created_at":"2026-07-04T17:13:22Z","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":"325372a47096c599915c9079cf116e1b0db17bfc9ec6e6d48b8c9b8b5284f04f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-29T11:20:27Z","title_canon_sha256":"e4a5d04efc50b9414d0a826c3e6d5a92f686598fad18b3127480830edae19b5b"},"schema_version":"1.0","source":{"id":"0810.5247","kind":"arxiv","version":1}},"canonical_sha256":"c828e587f4bb675eabb8a3562a6ce22ddd0808c3ad849cc9c1461e0fe00b14ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c828e587f4bb675eabb8a3562a6ce22ddd0808c3ad849cc9c1461e0fe00b14ca","first_computed_at":"2026-07-04T17:13:22.943276Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:13:22.943276Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iRoOaLYeU1A+YPIRMwqP2Kmh+Ub1AcZxszIZHaOQJ5kH+6H/mPhI4ptCIF4tLycE4xfkYdb3Tc01SdozxYT9AQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:13:22.943660Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.5247","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48b96edd505ecbe9b906572d4e1c3c014ee7e0e9c4fafff7352587e2751e8e10","sha256:3689ede334f3474f3e382056306a4f3252d921a66c165731206330bb6ea8d3d0"],"state_sha256":"85771bd4e2ff23e3211e6220f7e44ab59063bf03cf06c4f2b72ed41bb18d6e01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PmSso6ts6z/gA2WNaUlET5g7w/iTHsBDF1RJlUmCkqlYfkGMI1cr/n8YDayaTCK/Q7AfFBR2q5AdYyjgxMPsDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T19:50:00.052406Z","bundle_sha256":"eb0ae4fb52e428ab69198fcdba0e917bc77039350a525a3b4e0e1431c121787e"}}