{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:R2VH4Y2ML75TJGZCTD6YCV55BY","short_pith_number":"pith:R2VH4Y2M","schema_version":"1.0","canonical_sha256":"8eaa7e634c5ffb349b2298fd8157bd0e009e5adf6756e59bb3eb9a33ee198126","source":{"kind":"arxiv","id":"0905.1807","version":1},"attestation_state":"computed","paper":{"title":"Photometric monitoring of the young star Par 1724 in Orion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Koeltzsch, C. Broeg (U Bern), C. Ginski, F. Bertoldi (U Bonn), M.M. Hohle, M. Moualla (AIU Jena), M. Mugrauer (AIU Jena), M. Vanko, N. Young (Jodrell Bank U Manchester), R. Neuhaeuser, St. Raetz, T. Eisenbeiss, T.O.B. Schmidt, T. Roell, W. Rammo","submitted_at":"2009-05-12T13:02:52Z","abstract_excerpt":"We report new photometric observations of the 200000 year old naked weak-line run-away T Tauri star Par 1724, located north of the Trapezium cluster in Orion. We observed in the broad band filters B, V, R, and I using the 90cm Dutch telescope on La Silla, the 80cm Wendelstein telescope, and a 25cm telescope of the University Observatory Jena in Grossschwabhausen near Jena. The photometric data in V and R are consistent with a 5.7 day rotation period due to spots, as observed before between 1960ies and 2000. Also, for the first time, we present evidence for a long-term 9 or 17.5 year cycle in p"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0905.1807","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-05-12T13:02:52Z","cross_cats_sorted":[],"title_canon_sha256":"e0254e5145e2d979c28d5ae3d3e14de14a7d82d055e17e1599d21c400ab9064f","abstract_canon_sha256":"bc72fd8029d6ca45c67a3145bec0802eefea618a8075fae7bde130ecdda2d8a1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:40.609994Z","signature_b64":"A3zUx7SuqdofdjXHAYZOLVjITHhiN6ZIYvMR4CZnV4I09OcxAxJBVtwAMfKxVc9bg8m1OxeaJi1Oggg7Fuf2AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8eaa7e634c5ffb349b2298fd8157bd0e009e5adf6756e59bb3eb9a33ee198126","last_reissued_at":"2026-05-18T04:36:40.609593Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:40.609593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Photometric monitoring of the young star Par 1724 in Orion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Koeltzsch, C. Broeg (U Bern), C. Ginski, F. Bertoldi (U Bonn), M.M. Hohle, M. Moualla (AIU Jena), M. Mugrauer (AIU Jena), M. Vanko, N. Young (Jodrell Bank U Manchester), R. Neuhaeuser, St. Raetz, T. Eisenbeiss, T.O.B. Schmidt, T. Roell, W. Rammo","submitted_at":"2009-05-12T13:02:52Z","abstract_excerpt":"We report new photometric observations of the 200000 year old naked weak-line run-away T Tauri star Par 1724, located north of the Trapezium cluster in Orion. We observed in the broad band filters B, V, R, and I using the 90cm Dutch telescope on La Silla, the 80cm Wendelstein telescope, and a 25cm telescope of the University Observatory Jena in Grossschwabhausen near Jena. The photometric data in V and R are consistent with a 5.7 day rotation period due to spots, as observed before between 1960ies and 2000. Also, for the first time, we present evidence for a long-term 9 or 17.5 year cycle in p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1807","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0905.1807","created_at":"2026-05-18T04:36:40.609650+00:00"},{"alias_kind":"arxiv_version","alias_value":"0905.1807v1","created_at":"2026-05-18T04:36:40.609650+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1807","created_at":"2026-05-18T04:36:40.609650+00:00"},{"alias_kind":"pith_short_12","alias_value":"R2VH4Y2ML75T","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"R2VH4Y2ML75TJGZC","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"R2VH4Y2M","created_at":"2026-05-18T12:26:01.383474+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY","json":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY.json","graph_json":"https://pith.science/api/pith-number/R2VH4Y2ML75TJGZCTD6YCV55BY/graph.json","events_json":"https://pith.science/api/pith-number/R2VH4Y2ML75TJGZCTD6YCV55BY/events.json","paper":"https://pith.science/paper/R2VH4Y2M"},"agent_actions":{"view_html":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY","download_json":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY.json","view_paper":"https://pith.science/paper/R2VH4Y2M","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0905.1807&json=true","fetch_graph":"https://pith.science/api/pith-number/R2VH4Y2ML75TJGZCTD6YCV55BY/graph.json","fetch_events":"https://pith.science/api/pith-number/R2VH4Y2ML75TJGZCTD6YCV55BY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY/action/storage_attestation","attest_author":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY/action/author_attestation","sign_citation":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY/action/citation_signature","submit_replication":"https://pith.science/pith/R2VH4Y2ML75TJGZCTD6YCV55BY/action/replication_record"}},"created_at":"2026-05-18T04:36:40.609650+00:00","updated_at":"2026-05-18T04:36:40.609650+00:00"}