{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:ZO7QRQES2QVBLKKD2E774PSHHZ","short_pith_number":"pith:ZO7QRQES","canonical_record":{"source":{"id":"1005.1854","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-11T15:10:05Z","cross_cats_sorted":[],"title_canon_sha256":"dc6beab7f2c784b61365e2e73e16b043c636607729b50066a094d0f39d510030","abstract_canon_sha256":"b9c0bd16ba8f34715802ad48915a7c5383edb11e9d1d674427de6bd269b6eb41"},"schema_version":"1.0"},"canonical_sha256":"cbbf08c092d42a15a943d13ffe3e473e5284af8167d98301858e19438a0a0f84","source":{"kind":"arxiv","id":"1005.1854","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.1854","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"arxiv_version","alias_value":"1005.1854v1","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.1854","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"pith_short_12","alias_value":"ZO7QRQES2QVB","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"ZO7QRQES2QVBLKKD","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"ZO7QRQES","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:ZO7QRQES2QVBLKKD2E774PSHHZ","target":"record","payload":{"canonical_record":{"source":{"id":"1005.1854","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-11T15:10:05Z","cross_cats_sorted":[],"title_canon_sha256":"dc6beab7f2c784b61365e2e73e16b043c636607729b50066a094d0f39d510030","abstract_canon_sha256":"b9c0bd16ba8f34715802ad48915a7c5383edb11e9d1d674427de6bd269b6eb41"},"schema_version":"1.0"},"canonical_sha256":"cbbf08c092d42a15a943d13ffe3e473e5284af8167d98301858e19438a0a0f84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:34.205542Z","signature_b64":"iReG4xB8TbZdk5SULV8xwQrQLB9nHwp2C2ssuWUbTavsXCi4iV/vHPMJji86zWA3+MY8N2kwW3laqlY5aPMDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbbf08c092d42a15a943d13ffe3e473e5284af8167d98301858e19438a0a0f84","last_reissued_at":"2026-05-18T02:07:34.204984Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:34.204984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.1854","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":"2026-05-18T02:07:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6g3EtPwWwIR3aMytd85DD09d6Q2wHqs8NoXSG7YFW/7n499gAvzFGS/ZZopi7TjGmnwmF1BEM5HtaWV2GYpxDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:09:43.908606Z"},"content_sha256":"6a161d6a46ee5f86e00d8e9f1a1b58d7b236acbfbd5cceeb3038b62133b8a633","schema_version":"1.0","event_id":"sha256:6a161d6a46ee5f86e00d8e9f1a1b58d7b236acbfbd5cceeb3038b62133b8a633"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:ZO7QRQES2QVBLKKD2E774PSHHZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of a magnetic field on HD108: clues to extreme magnetic braking and the Of?p phenomenon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"2- LATT Toulouse, 3- LAM Marseille, 4), 4- Observatorio Nacional, 5), 5- NASA/GSFC, 6- RMC, 7- UCL London), C. Escolano (3), F. Martins (1), G.A. Wade (6), Greenbelt, I.D. Howarth (7) (1- GRAAL Montpellier, J.-C. Bouret (3, J.-F. Donati (2), Kingston, Rio de Janeiro, W.L.F. Marcolino (3","submitted_at":"2010-05-11T15:10:05Z","abstract_excerpt":"We report the detection of a magnetic field on the Of?p star HD108. Spectropolarimetric observations conducted in 2007, 2008 and 2009 respectively with NARVAL@TBL and ESPaDOnS@CFHT reveal a clear Zeeman signature in the average Stokes V profile, stable on timescales of days to months and slowly increasing in amplitude on timescales of years.  We speculate that this timescale is the same as that on which Ha emission is varying and is equal to the rotation period of the star. The corresponding longitudinal magnetic field, measured during each of the three seasons, increases slowly from 100 to 15"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.1854","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":"2026-05-18T02:07:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bQS0SReoSkWsRfZlo/Bi+dBpWcttEGURHe+4rGjfTNkuWVI+38y0abTllKWqX9S8/aXx9wswfJe9mhLMjyqUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:09:43.908983Z"},"content_sha256":"52fba181ae0184f5d8c806e57f3c7ec831da20b79a5d9847c3beadbe3fa01453","schema_version":"1.0","event_id":"sha256:52fba181ae0184f5d8c806e57f3c7ec831da20b79a5d9847c3beadbe3fa01453"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/bundle.json","state_url":"https://pith.science/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/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":"2026-05-26T18:09:43Z","links":{"resolver":"https://pith.science/pith/ZO7QRQES2QVBLKKD2E774PSHHZ","bundle":"https://pith.science/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/bundle.json","state":"https://pith.science/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZO7QRQES2QVBLKKD2E774PSHHZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ZO7QRQES2QVBLKKD2E774PSHHZ","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":"b9c0bd16ba8f34715802ad48915a7c5383edb11e9d1d674427de6bd269b6eb41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-11T15:10:05Z","title_canon_sha256":"dc6beab7f2c784b61365e2e73e16b043c636607729b50066a094d0f39d510030"},"schema_version":"1.0","source":{"id":"1005.1854","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.1854","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"arxiv_version","alias_value":"1005.1854v1","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.1854","created_at":"2026-05-18T02:07:34Z"},{"alias_kind":"pith_short_12","alias_value":"ZO7QRQES2QVB","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"ZO7QRQES2QVBLKKD","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"ZO7QRQES","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:52fba181ae0184f5d8c806e57f3c7ec831da20b79a5d9847c3beadbe3fa01453","target":"graph","created_at":"2026-05-18T02:07:34Z","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 report the detection of a magnetic field on the Of?p star HD108. Spectropolarimetric observations conducted in 2007, 2008 and 2009 respectively with NARVAL@TBL and ESPaDOnS@CFHT reveal a clear Zeeman signature in the average Stokes V profile, stable on timescales of days to months and slowly increasing in amplitude on timescales of years.  We speculate that this timescale is the same as that on which Ha emission is varying and is equal to the rotation period of the star. The corresponding longitudinal magnetic field, measured during each of the three seasons, increases slowly from 100 to 15","authors_text":"2- LATT Toulouse, 3- LAM Marseille, 4), 4- Observatorio Nacional, 5), 5- NASA/GSFC, 6- RMC, 7- UCL London), C. Escolano (3), F. Martins (1), G.A. Wade (6), Greenbelt, I.D. Howarth (7) (1- GRAAL Montpellier, J.-C. Bouret (3, J.-F. Donati (2), Kingston, Rio de Janeiro, W.L.F. Marcolino (3","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-11T15:10:05Z","title":"Detection of a magnetic field on HD108: clues to extreme magnetic braking and the Of?p phenomenon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.1854","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":"sha256:6a161d6a46ee5f86e00d8e9f1a1b58d7b236acbfbd5cceeb3038b62133b8a633","target":"record","created_at":"2026-05-18T02:07:34Z","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":"b9c0bd16ba8f34715802ad48915a7c5383edb11e9d1d674427de6bd269b6eb41","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-11T15:10:05Z","title_canon_sha256":"dc6beab7f2c784b61365e2e73e16b043c636607729b50066a094d0f39d510030"},"schema_version":"1.0","source":{"id":"1005.1854","kind":"arxiv","version":1}},"canonical_sha256":"cbbf08c092d42a15a943d13ffe3e473e5284af8167d98301858e19438a0a0f84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbbf08c092d42a15a943d13ffe3e473e5284af8167d98301858e19438a0a0f84","first_computed_at":"2026-05-18T02:07:34.204984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:34.204984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iReG4xB8TbZdk5SULV8xwQrQLB9nHwp2C2ssuWUbTavsXCi4iV/vHPMJji86zWA3+MY8N2kwW3laqlY5aPMDCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:34.205542Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.1854","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6a161d6a46ee5f86e00d8e9f1a1b58d7b236acbfbd5cceeb3038b62133b8a633","sha256:52fba181ae0184f5d8c806e57f3c7ec831da20b79a5d9847c3beadbe3fa01453"],"state_sha256":"62c4072f3622f47bc1992bbf0af0a5734053a6295c6eba5c7b7830283b8d5d8c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AIZ8PEVpQ3VLwxLqSNz/mnnUFeYAmN6LGdJhEY1mX/ubzKiWKMekVIlYiSqeyrPnH0yPQJFqRsmZYsJTw1QQAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:09:43.911539Z","bundle_sha256":"ac6fdfb789505abe527008e23688b40507ba732572fd0ff3c640d3dcf899207f"}}