{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:ASOBBDJSYGO4PEZXWLWG5NZZ4H","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":"797be053f3bf9b00351a436690c0911e24e172d24f9ca86f931b8467bd6b888f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-13T14:43:49Z","title_canon_sha256":"71e5793530cf452ad04b2a88f82ee38c1762cfd51b589d7461ef12445a17e57e"},"schema_version":"1.0","source":{"id":"astro-ph/0703296","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0703296","created_at":"2026-07-04T15:00:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703296v1","created_at":"2026-07-04T15:00:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703296","created_at":"2026-07-04T15:00:05Z"},{"alias_kind":"pith_short_12","alias_value":"ASOBBDJSYGO4","created_at":"2026-07-04T15:00:05Z"},{"alias_kind":"pith_short_16","alias_value":"ASOBBDJSYGO4PEZX","created_at":"2026-07-04T15:00:05Z"},{"alias_kind":"pith_short_8","alias_value":"ASOBBDJS","created_at":"2026-07-04T15:00:05Z"}],"graph_snapshots":[{"event_id":"sha256:85b4bfe4046f7995141a7b8b48125bab53ff9b26bc408c826391b479001e8559","target":"graph","created_at":"2026-07-04T15:00:05Z","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/astro-ph/0703296/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present results of the Ca stratification analysis in the atmospheres of 21 magnetic chemically peculiar (Ap) stars. This analysis was based on the spectral observations carried out with the UVES spectrograph attached to the 8-m VLT telescope. Ca was found to be strongly stratified in all stars with different effective temperatures and magnetic field strengths. This element is overabundant by 1-1.5 dex below logtau_5000~-1 and strongly depleted above logtau_5000=-1.5. Based on the overall Ca abundance distributions, we modelled a profile of the IR-triplet Ca II 8498 line. It shows a signific","authors_text":"O. Kochukhov, S. Bagnulo, T. Ryabchikova","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-03-13T14:43:49Z","title":"Ca isotopic anomaly in the atmospheres of Ap stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703296","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:bb058a1c644adb14da464d35652e33e325e989b49b2c1317aaddd2efc4d2aac1","target":"record","created_at":"2026-07-04T15:00:05Z","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":"797be053f3bf9b00351a436690c0911e24e172d24f9ca86f931b8467bd6b888f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-13T14:43:49Z","title_canon_sha256":"71e5793530cf452ad04b2a88f82ee38c1762cfd51b589d7461ef12445a17e57e"},"schema_version":"1.0","source":{"id":"astro-ph/0703296","kind":"arxiv","version":1}},"canonical_sha256":"049c108d32c19dc79337b2ec6eb739e1c404c7af8356e6d81ffa59b98319afdf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"049c108d32c19dc79337b2ec6eb739e1c404c7af8356e6d81ffa59b98319afdf","first_computed_at":"2026-07-04T15:00:05.442536Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:00:05.442536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KgwK2bIb4PsGbEqlVkjCDBl0X7h9ZMNNbRMxRq2E413NJvE0CXVcKzqU9ZmRz2umBnvoonBRpMH1sUnZLmjdBw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:00:05.442926Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0703296","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb058a1c644adb14da464d35652e33e325e989b49b2c1317aaddd2efc4d2aac1","sha256:85b4bfe4046f7995141a7b8b48125bab53ff9b26bc408c826391b479001e8559"],"state_sha256":"7c60251d9e4007e473f1812bcf1638ceed4dcc899374794315e6e6fd9b3b7c41"}