{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:WP43ZIL2W4CUJXBKIRMBCMYYPX","short_pith_number":"pith:WP43ZIL2","canonical_record":{"source":{"id":"0908.3336","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-23T21:21:18Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"2c71876bf0c8f37bfed3ea33e1b6b02a3365a8184601e888299bb5efac2fbd5e","abstract_canon_sha256":"4010c241f4ff37f7a032ff83e276ccba066268b2eb210a19d304ea3c6668c608"},"schema_version":"1.0"},"canonical_sha256":"b3f9bca17ab70544dc2a44581133187dc06a47097db241d97f3ee89a35508c90","source":{"kind":"arxiv","id":"0908.3336","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.3336","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"arxiv_version","alias_value":"0908.3336v2","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.3336","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"pith_short_12","alias_value":"WP43ZIL2W4CU","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"WP43ZIL2W4CUJXBK","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"WP43ZIL2","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:WP43ZIL2W4CUJXBKIRMBCMYYPX","target":"record","payload":{"canonical_record":{"source":{"id":"0908.3336","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-23T21:21:18Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"2c71876bf0c8f37bfed3ea33e1b6b02a3365a8184601e888299bb5efac2fbd5e","abstract_canon_sha256":"4010c241f4ff37f7a032ff83e276ccba066268b2eb210a19d304ea3c6668c608"},"schema_version":"1.0"},"canonical_sha256":"b3f9bca17ab70544dc2a44581133187dc06a47097db241d97f3ee89a35508c90","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:23.787821Z","signature_b64":"tgfXPGX/nceSRPZqPMkGGKkNRQfgQ4SK83ySxDy/Tq2DHTM+xltRT0KQX8a55pzwlUwrRukR+3REZMLbwlIeDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b3f9bca17ab70544dc2a44581133187dc06a47097db241d97f3ee89a35508c90","last_reissued_at":"2026-05-18T02:12:23.787016Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:23.787016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0908.3336","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":"2026-05-18T02:12:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v9FYRqTxdNcZfKnT+Uosx9xg83S0tWfsNdfnioTC94M48wVgjbR4Pusd+Xsb8ia4ml4lrCoQ95d2ka6Slt39CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:53:29.516603Z"},"content_sha256":"c16d01509bab0000dc71d42e1b732043b2978bd634b2ee6f2a12d85fca35e4af","schema_version":"1.0","event_id":"sha256:c16d01509bab0000dc71d42e1b732043b2978bd634b2ee6f2a12d85fca35e4af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:WP43ZIL2W4CUJXBKIRMBCMYYPX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Line-profile variability from tidal flows in Alpha Virginis (Spica)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"D.M. Harrington, E. Moreno, G. Koenigsberger, J.R. Kuhn","submitted_at":"2009-08-23T21:21:18Z","abstract_excerpt":"We present the results of high precision, high resolution (R~68000) optical observations of the short-period (4d) eccentric binary system Alpha Virginis (Spica) showing the photospheric line-profile variability that in this system can be attributed to non-radial pulsations driven by tidal effects. Although scant in orbital phase coverage, the data provide S/N>2000 line profiles at full spectral resolution in the wavelength range delta-lambda = 4000--8500 Angstroms, allowing a detailed study of the night-to-night variability as well as changes that occur on ~2 hr timescale. Using an ab initio t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.3336","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":"2026-05-18T02:12:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bn7nhkQIVZNYMbRvBtRYsObTqbPmDnE34oAo8+KzjTZ0d84d+Yr2+OR/JPx9QVAHB5Feo55N+zrI1wDuwuEQBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:53:29.516951Z"},"content_sha256":"25f8d14fec87f0d35449357fcc70db76ae7dbb9f2f758360ce919539614afdf4","schema_version":"1.0","event_id":"sha256:25f8d14fec87f0d35449357fcc70db76ae7dbb9f2f758360ce919539614afdf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/bundle.json","state_url":"https://pith.science/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/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":"2026-06-03T22:53:29Z","links":{"resolver":"https://pith.science/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX","bundle":"https://pith.science/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/bundle.json","state":"https://pith.science/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WP43ZIL2W4CUJXBKIRMBCMYYPX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:WP43ZIL2W4CUJXBKIRMBCMYYPX","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":"4010c241f4ff37f7a032ff83e276ccba066268b2eb210a19d304ea3c6668c608","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-23T21:21:18Z","title_canon_sha256":"2c71876bf0c8f37bfed3ea33e1b6b02a3365a8184601e888299bb5efac2fbd5e"},"schema_version":"1.0","source":{"id":"0908.3336","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.3336","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"arxiv_version","alias_value":"0908.3336v2","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.3336","created_at":"2026-05-18T02:12:23Z"},{"alias_kind":"pith_short_12","alias_value":"WP43ZIL2W4CU","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"WP43ZIL2W4CUJXBK","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"WP43ZIL2","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:25f8d14fec87f0d35449357fcc70db76ae7dbb9f2f758360ce919539614afdf4","target":"graph","created_at":"2026-05-18T02:12:23Z","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 present the results of high precision, high resolution (R~68000) optical observations of the short-period (4d) eccentric binary system Alpha Virginis (Spica) showing the photospheric line-profile variability that in this system can be attributed to non-radial pulsations driven by tidal effects. Although scant in orbital phase coverage, the data provide S/N>2000 line profiles at full spectral resolution in the wavelength range delta-lambda = 4000--8500 Angstroms, allowing a detailed study of the night-to-night variability as well as changes that occur on ~2 hr timescale. Using an ab initio t","authors_text":"D.M. Harrington, E. Moreno, G. Koenigsberger, J.R. Kuhn","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-23T21:21:18Z","title":"Line-profile variability from tidal flows in Alpha Virginis (Spica)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.3336","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:c16d01509bab0000dc71d42e1b732043b2978bd634b2ee6f2a12d85fca35e4af","target":"record","created_at":"2026-05-18T02:12:23Z","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":"4010c241f4ff37f7a032ff83e276ccba066268b2eb210a19d304ea3c6668c608","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-23T21:21:18Z","title_canon_sha256":"2c71876bf0c8f37bfed3ea33e1b6b02a3365a8184601e888299bb5efac2fbd5e"},"schema_version":"1.0","source":{"id":"0908.3336","kind":"arxiv","version":2}},"canonical_sha256":"b3f9bca17ab70544dc2a44581133187dc06a47097db241d97f3ee89a35508c90","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3f9bca17ab70544dc2a44581133187dc06a47097db241d97f3ee89a35508c90","first_computed_at":"2026-05-18T02:12:23.787016Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:23.787016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tgfXPGX/nceSRPZqPMkGGKkNRQfgQ4SK83ySxDy/Tq2DHTM+xltRT0KQX8a55pzwlUwrRukR+3REZMLbwlIeDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:23.787821Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.3336","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c16d01509bab0000dc71d42e1b732043b2978bd634b2ee6f2a12d85fca35e4af","sha256:25f8d14fec87f0d35449357fcc70db76ae7dbb9f2f758360ce919539614afdf4"],"state_sha256":"e8cb64bf1ab5b7d6aa33bfe8b9de6f08530aa21aa0de66481ce41b5fb97a5497"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0RyaES1yDbFs0oOB2QlSH+6V+vjgJpUzE4spZOcd0Ht6aqHfugLY+bHcPwUxg+Xn1PlKiNFurAvbd52vk1o0CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T22:53:29.519174Z","bundle_sha256":"350e1e7b4e11512770be1f4dea5eee51f5b8e13938c0691b8a9c2522138a4053"}}