{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:VGYA7QYDMU3T3ZJ5VGSJF27DMU","short_pith_number":"pith:VGYA7QYD","canonical_record":{"source":{"id":"1001.1852","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T11:30:13Z","cross_cats_sorted":[],"title_canon_sha256":"5796c8252f081126714310818eb72817ea0d79d4da211c6d2936ee62d484e8a6","abstract_canon_sha256":"ddc5891522c9cefe5a8c768dff4fa4042751190474db8277df378fe9b9357ca8"},"schema_version":"1.0"},"canonical_sha256":"a9b00fc30365373de53da9a492ebe365160ba5797c1be6bfe38847468f7cca75","source":{"kind":"arxiv","id":"1001.1852","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1852","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1852v2","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1852","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"pith_short_12","alias_value":"VGYA7QYDMU3T","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VGYA7QYDMU3T3ZJ5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VGYA7QYD","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:VGYA7QYDMU3T3ZJ5VGSJF27DMU","target":"record","payload":{"canonical_record":{"source":{"id":"1001.1852","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T11:30:13Z","cross_cats_sorted":[],"title_canon_sha256":"5796c8252f081126714310818eb72817ea0d79d4da211c6d2936ee62d484e8a6","abstract_canon_sha256":"ddc5891522c9cefe5a8c768dff4fa4042751190474db8277df378fe9b9357ca8"},"schema_version":"1.0"},"canonical_sha256":"a9b00fc30365373de53da9a492ebe365160ba5797c1be6bfe38847468f7cca75","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:41.995714Z","signature_b64":"/QL89gRMiiPCcX72OKp7WL8/pkGGMHe6LHhC4LBFQu79QRstaEmlmipyR6FG1jL2C9I1lTO+NFXd7bq1vQubAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9b00fc30365373de53da9a492ebe365160ba5797c1be6bfe38847468f7cca75","last_reissued_at":"2026-05-18T03:31:41.994833Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:41.994833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.1852","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":"2026-05-18T03:31:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nbfARJrwycxGWEB9ddht5p4gEQMPU047l2wGR3iNLVtvqMR98xUbIuGRpsg5q4MU5QzkE6vn5buqIJm7EVK5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:15:30.700821Z"},"content_sha256":"14047b1855a84736944538f385ba60f1cd457700252f2059dd686e721b99f2ad","schema_version":"1.0","event_id":"sha256:14047b1855a84736944538f385ba60f1cd457700252f2059dd686e721b99f2ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:VGYA7QYDMU3T3ZJ5VGSJF27DMU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Four-colour photometry of EY Dra: a study of an ultra-fast rotating active dM1-2e star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"\\'A. S\\'odor, B. Belucz, I. D\\'ek\\'any, I. Nagy, J. Jurcsik, K. Ol\\'ah, K. Posztob\\'anyi, K. Vida, M. V\\'aradi, Zs. Hurta, Zs. K\\H{o}v\\'ari","submitted_at":"2010-01-12T11:30:13Z","abstract_excerpt":"We present more than 1000-day long photometry of EY Draconis in BV(RI)C passbands. The changes in the light curve are caused by the spottedness of the rotating surface. Modelling of the spotted surface shows that there are two large active regions present on the star on the opposite hemispheres. The evolution of the surface patterns suggests a flip-flop phenomenon. Using Fourier analysis, we detect a rotation period of P_rot=0.45875d, and an activity cycle with P~350d, similar to the 11-year long cycle of the Sun. This cycle with its year-long period is the shortest one ever detected on active"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1852","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":"2026-05-18T03:31:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kSJzNTE5FniUmB4YfgkgAS1yEPgN+gzKJ5FzAkcbIKrMuXmv7UkOrtCi/BnUlzd0ZijsY9gv9uMpPutCKez/Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:15:30.701485Z"},"content_sha256":"c9f9092ca7160827d1184efb49a3429adfbe5ffb2011613f062d1bf3933ec895","schema_version":"1.0","event_id":"sha256:c9f9092ca7160827d1184efb49a3429adfbe5ffb2011613f062d1bf3933ec895"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/bundle.json","state_url":"https://pith.science/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/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":"2026-05-18T23:15:30Z","links":{"resolver":"https://pith.science/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU","bundle":"https://pith.science/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/bundle.json","state":"https://pith.science/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGYA7QYDMU3T3ZJ5VGSJF27DMU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:VGYA7QYDMU3T3ZJ5VGSJF27DMU","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":"ddc5891522c9cefe5a8c768dff4fa4042751190474db8277df378fe9b9357ca8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T11:30:13Z","title_canon_sha256":"5796c8252f081126714310818eb72817ea0d79d4da211c6d2936ee62d484e8a6"},"schema_version":"1.0","source":{"id":"1001.1852","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1852","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1852v2","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1852","created_at":"2026-05-18T03:31:41Z"},{"alias_kind":"pith_short_12","alias_value":"VGYA7QYDMU3T","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VGYA7QYDMU3T3ZJ5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VGYA7QYD","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:c9f9092ca7160827d1184efb49a3429adfbe5ffb2011613f062d1bf3933ec895","target":"graph","created_at":"2026-05-18T03:31:41Z","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 more than 1000-day long photometry of EY Draconis in BV(RI)C passbands. The changes in the light curve are caused by the spottedness of the rotating surface. Modelling of the spotted surface shows that there are two large active regions present on the star on the opposite hemispheres. The evolution of the surface patterns suggests a flip-flop phenomenon. Using Fourier analysis, we detect a rotation period of P_rot=0.45875d, and an activity cycle with P~350d, similar to the 11-year long cycle of the Sun. This cycle with its year-long period is the shortest one ever detected on active","authors_text":"\\'A. S\\'odor, B. Belucz, I. D\\'ek\\'any, I. Nagy, J. Jurcsik, K. Ol\\'ah, K. Posztob\\'anyi, K. Vida, M. V\\'aradi, Zs. Hurta, Zs. K\\H{o}v\\'ari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T11:30:13Z","title":"Four-colour photometry of EY Dra: a study of an ultra-fast rotating active dM1-2e star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1852","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":"sha256:14047b1855a84736944538f385ba60f1cd457700252f2059dd686e721b99f2ad","target":"record","created_at":"2026-05-18T03:31:41Z","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":"ddc5891522c9cefe5a8c768dff4fa4042751190474db8277df378fe9b9357ca8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T11:30:13Z","title_canon_sha256":"5796c8252f081126714310818eb72817ea0d79d4da211c6d2936ee62d484e8a6"},"schema_version":"1.0","source":{"id":"1001.1852","kind":"arxiv","version":2}},"canonical_sha256":"a9b00fc30365373de53da9a492ebe365160ba5797c1be6bfe38847468f7cca75","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9b00fc30365373de53da9a492ebe365160ba5797c1be6bfe38847468f7cca75","first_computed_at":"2026-05-18T03:31:41.994833Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:41.994833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/QL89gRMiiPCcX72OKp7WL8/pkGGMHe6LHhC4LBFQu79QRstaEmlmipyR6FG1jL2C9I1lTO+NFXd7bq1vQubAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:41.995714Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.1852","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14047b1855a84736944538f385ba60f1cd457700252f2059dd686e721b99f2ad","sha256:c9f9092ca7160827d1184efb49a3429adfbe5ffb2011613f062d1bf3933ec895"],"state_sha256":"f524398a80913c6d6a64c9bac7a274fc3a15c5b1ac40229960506516c0d8e686"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rr0SwZL7BST7Rq8Jw93flX/VV31jb8nv+1JRXA/cRVvDKEAm2pCh2rcheHYYhotwZaHJyJhlD8Nc+kwgWuyVAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T23:15:30.703528Z","bundle_sha256":"ba16e7e54232bdaaf7666a763ef6055730023d5942a99db884dce7db5d7d4980"}}