{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:TFHZEQD3PE4KJPUAPVWQN7BL7R","short_pith_number":"pith:TFHZEQD3","canonical_record":{"source":{"id":"1109.5476","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-09-26T08:06:10Z","cross_cats_sorted":[],"title_canon_sha256":"4514c0f4d58e69737f5ce7ff2e3e6cb06374ccfef78643a21a07e93597955397","abstract_canon_sha256":"b2c81fef41b6b8b02115b11e2a5523ccaebe1c7bacadc9e21fdd6f62e92c051a"},"schema_version":"1.0"},"canonical_sha256":"994f92407b7938a4be807d6d06fc2bfc702974c3efd3aca0e3e49051b05da167","source":{"kind":"arxiv","id":"1109.5476","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5476","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5476v1","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5476","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"pith_short_12","alias_value":"TFHZEQD3PE4K","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TFHZEQD3PE4KJPUA","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TFHZEQD3","created_at":"2026-05-18T12:26:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:TFHZEQD3PE4KJPUAPVWQN7BL7R","target":"record","payload":{"canonical_record":{"source":{"id":"1109.5476","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-09-26T08:06:10Z","cross_cats_sorted":[],"title_canon_sha256":"4514c0f4d58e69737f5ce7ff2e3e6cb06374ccfef78643a21a07e93597955397","abstract_canon_sha256":"b2c81fef41b6b8b02115b11e2a5523ccaebe1c7bacadc9e21fdd6f62e92c051a"},"schema_version":"1.0"},"canonical_sha256":"994f92407b7938a4be807d6d06fc2bfc702974c3efd3aca0e3e49051b05da167","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:23.752662Z","signature_b64":"qwsZAWWSkVfOioxHdypQ9ENxIqBrLH49KjPotcnbXT+52MPR2pJdiHFTjYy+2/DR2fTyDNJu/jkZ1a4OORXJBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"994f92407b7938a4be807d6d06fc2bfc702974c3efd3aca0e3e49051b05da167","last_reissued_at":"2026-05-18T02:00:23.751974Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:23.751974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.5476","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":"2026-05-18T02:00:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y5tUmnjRXArfREQBqyN8xJlmU2YumiwFt4IInatLvSTjDeE3W4cDZe1G629UB3OV8UR6lBY2FCqNmFZpQMZ7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:32:42.184664Z"},"content_sha256":"8112ef1fc19d8748711439c2be4a37e73c2408f4e367ce5f2d4f75ca9b382e71","schema_version":"1.0","event_id":"sha256:8112ef1fc19d8748711439c2be4a37e73c2408f4e367ce5f2d4f75ca9b382e71"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:TFHZEQD3PE4KJPUAPVWQN7BL7R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chromosphere of K giant stars Geometrical extent and spatial structure detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Spang, B. Pichon, C. Farrington, D. Bonneau, D. Mourard, F. Thevenin, H. McAlister, I. Tallon-Bosc, J.M. Clausse, J. Sturmann, K. Perraut, L. Sturmann, N. Nardetto, N. Turner, O. Chesneau, O. Delaa, P. Berio, P.J. Goldfinger, P. Stee, R. Ligi, T. Merle, T. ten Brummelaar","submitted_at":"2011-09-26T08:06:10Z","abstract_excerpt":"We aim to constrain the geometrical extent of the chromosphere of non-binary K giant stars and detect any spatial structures in the chromosphere. We performed observations with the CHARA interferometer and the VEGA beam combiner at optical wavelengths. We observed seven non-binary K giant stars. We measured the ratio of the radii of the photosphere to the chromosphere using the interferometric measurements in the Halpha and the Ca II infrared triplet line cores. For beta Ceti, spectro-interferometric observations are compared to an non-local thermal equilibrium (NLTE) semi-empirical model atmo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5476","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":"2026-05-18T02:00:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WAHm9CpJBBxfozGr3w1PDI9du7UJeHikyf6sQNCzOo2ibFnXei1U5yFMsKQIKQfw2gjGrVJDO7K9530aN6SWCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:32:42.185499Z"},"content_sha256":"efc6fb9ab2821c8bd37560920480503501ab1283f93f1f9335474eea2b38f42f","schema_version":"1.0","event_id":"sha256:efc6fb9ab2821c8bd37560920480503501ab1283f93f1f9335474eea2b38f42f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/bundle.json","state_url":"https://pith.science/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/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":"2026-05-30T22:32:42Z","links":{"resolver":"https://pith.science/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R","bundle":"https://pith.science/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/bundle.json","state":"https://pith.science/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TFHZEQD3PE4KJPUAPVWQN7BL7R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:TFHZEQD3PE4KJPUAPVWQN7BL7R","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":"b2c81fef41b6b8b02115b11e2a5523ccaebe1c7bacadc9e21fdd6f62e92c051a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-09-26T08:06:10Z","title_canon_sha256":"4514c0f4d58e69737f5ce7ff2e3e6cb06374ccfef78643a21a07e93597955397"},"schema_version":"1.0","source":{"id":"1109.5476","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.5476","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"arxiv_version","alias_value":"1109.5476v1","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.5476","created_at":"2026-05-18T02:00:23Z"},{"alias_kind":"pith_short_12","alias_value":"TFHZEQD3PE4K","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TFHZEQD3PE4KJPUA","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TFHZEQD3","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:efc6fb9ab2821c8bd37560920480503501ab1283f93f1f9335474eea2b38f42f","target":"graph","created_at":"2026-05-18T02:00:23Z","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 aim to constrain the geometrical extent of the chromosphere of non-binary K giant stars and detect any spatial structures in the chromosphere. We performed observations with the CHARA interferometer and the VEGA beam combiner at optical wavelengths. We observed seven non-binary K giant stars. We measured the ratio of the radii of the photosphere to the chromosphere using the interferometric measurements in the Halpha and the Ca II infrared triplet line cores. For beta Ceti, spectro-interferometric observations are compared to an non-local thermal equilibrium (NLTE) semi-empirical model atmo","authors_text":"A. Spang, B. Pichon, C. Farrington, D. Bonneau, D. Mourard, F. Thevenin, H. McAlister, I. Tallon-Bosc, J.M. Clausse, J. Sturmann, K. Perraut, L. Sturmann, N. Nardetto, N. Turner, O. Chesneau, O. Delaa, P. Berio, P.J. Goldfinger, P. Stee, R. Ligi, T. Merle, T. ten Brummelaar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-09-26T08:06:10Z","title":"Chromosphere of K giant stars Geometrical extent and spatial structure detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.5476","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":"sha256:8112ef1fc19d8748711439c2be4a37e73c2408f4e367ce5f2d4f75ca9b382e71","target":"record","created_at":"2026-05-18T02:00:23Z","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":"b2c81fef41b6b8b02115b11e2a5523ccaebe1c7bacadc9e21fdd6f62e92c051a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-09-26T08:06:10Z","title_canon_sha256":"4514c0f4d58e69737f5ce7ff2e3e6cb06374ccfef78643a21a07e93597955397"},"schema_version":"1.0","source":{"id":"1109.5476","kind":"arxiv","version":1}},"canonical_sha256":"994f92407b7938a4be807d6d06fc2bfc702974c3efd3aca0e3e49051b05da167","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"994f92407b7938a4be807d6d06fc2bfc702974c3efd3aca0e3e49051b05da167","first_computed_at":"2026-05-18T02:00:23.751974Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:23.751974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qwsZAWWSkVfOioxHdypQ9ENxIqBrLH49KjPotcnbXT+52MPR2pJdiHFTjYy+2/DR2fTyDNJu/jkZ1a4OORXJBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:23.752662Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.5476","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8112ef1fc19d8748711439c2be4a37e73c2408f4e367ce5f2d4f75ca9b382e71","sha256:efc6fb9ab2821c8bd37560920480503501ab1283f93f1f9335474eea2b38f42f"],"state_sha256":"bdb2d1a0ebb8b212e37ed60f66be679e8a15af468ec2252fee7ebadcdc89d994"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L2pk0XP5fzXN4arNGhNm5cXg0jyPHcEFHnxodygnHWwAuGV0No/hqoGi1lolVHyA12CzztAzPgs6WfwIxTkxBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:32:42.189800Z","bundle_sha256":"6f9d55b5f7845c65f73fb7a94e44d63ecad03550e7566b4472928f0c7840e878"}}