{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:RVNCCDSABIDCQKCDYUDTLAD2SC","short_pith_number":"pith:RVNCCDSA","canonical_record":{"source":{"id":"astro-ph/0303600","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-27T12:37:37Z","cross_cats_sorted":[],"title_canon_sha256":"9c9a505d0dabfbe36a14f92ed30ef62a9fe401b35fc483481502f5a414d28c12","abstract_canon_sha256":"4fe1a22a4afbde0d88fad487beb5c46071508768a15d213d21e655e870bad73c"},"schema_version":"1.0"},"canonical_sha256":"8d5a210e400a06282843c50735807a9080aa29a186ea159ef8c82e66b6c65827","source":{"kind":"arxiv","id":"astro-ph/0303600","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0303600","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0303600v2","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0303600","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_12","alias_value":"RVNCCDSABIDC","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_16","alias_value":"RVNCCDSABIDCQKCD","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_8","alias_value":"RVNCCDSA","created_at":"2026-07-04T16:36:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:RVNCCDSABIDCQKCDYUDTLAD2SC","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0303600","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-27T12:37:37Z","cross_cats_sorted":[],"title_canon_sha256":"9c9a505d0dabfbe36a14f92ed30ef62a9fe401b35fc483481502f5a414d28c12","abstract_canon_sha256":"4fe1a22a4afbde0d88fad487beb5c46071508768a15d213d21e655e870bad73c"},"schema_version":"1.0"},"canonical_sha256":"8d5a210e400a06282843c50735807a9080aa29a186ea159ef8c82e66b6c65827","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:36:45.032822Z","signature_b64":"oqxu4T3o5l0KJQKtUt6B3zBJWtMzr4WAYXlwDOEuMg4ifrW6j6vFAvEFig6iFusY6a064Gvm496Wkm8RNlrSAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d5a210e400a06282843c50735807a9080aa29a186ea159ef8c82e66b6c65827","last_reissued_at":"2026-07-04T16:36:45.032457Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:36:45.032457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0303600","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":"2026-07-04T16:36:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Iu2qnh0Y693vDEwiRudYORwss31v073hM6DQtOCIh/xL9i/+fYv7SyRGUKRiD6NDntaoZg7arUgN3cyoLR9qBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:26:10.535315Z"},"content_sha256":"96de7808b386f4347ad11ab85317d598fd8e7cf15ec4e5383f3002b2aebc4881","schema_version":"1.0","event_id":"sha256:96de7808b386f4347ad11ab85317d598fd8e7cf15ec4e5383f3002b2aebc4881"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:RVNCCDSABIDCQKCDYUDTLAD2SC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Brown dwarfs and low-mass stars in the Pleiades and Praesepe:- Membership and binarity","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) University of Leicester, (3) Queen's University of Belfast), A. C. Katsiyannis (3) ((1) Liverpool John Moores University, D. J. Pinfield (1), H. R. A. Jones (1), I. A. Steele (1), P. D. Dobbie (2), R. F. Jameson (2)","submitted_at":"2003-03-27T12:37:37Z","abstract_excerpt":"We present near infrared J-, H- and K-band photometry and optical spectroscopy of low-mass star and brown dwarf (BD) candidates in the Pleiades and Praesepe open clusters. We find that Pleiades stars with K=10.5--13 are rather redder than the NextGen isochrones. We also identify this effect amongst alphaPer sources from the literature, but find no evidence of it for field stars from the literature. It is possible that the I-K colour of youthful stars is affected by the presence of magnetic activity. In the 2-colour diagram we find no colour change across the \"M dwarf gap\" (which would be indic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0303600","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0303600/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:36:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oyWaLegT8hcTKWgRbTFkBZy6w6hF0VajpOo8SZPjYePBy9SJV11KYPNNeqLawJZICC3Uj8OarTln1SYoIfkaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:26:10.535803Z"},"content_sha256":"983be6e587e65f686ecff20331af5434b7692a5059f283f6635a95c2704cc2ef","schema_version":"1.0","event_id":"sha256:983be6e587e65f686ecff20331af5434b7692a5059f283f6635a95c2704cc2ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/bundle.json","state_url":"https://pith.science/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/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":"2026-08-06T19:26:10Z","links":{"resolver":"https://pith.science/pith/RVNCCDSABIDCQKCDYUDTLAD2SC","bundle":"https://pith.science/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/bundle.json","state":"https://pith.science/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RVNCCDSABIDCQKCDYUDTLAD2SC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:RVNCCDSABIDCQKCDYUDTLAD2SC","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":"4fe1a22a4afbde0d88fad487beb5c46071508768a15d213d21e655e870bad73c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-27T12:37:37Z","title_canon_sha256":"9c9a505d0dabfbe36a14f92ed30ef62a9fe401b35fc483481502f5a414d28c12"},"schema_version":"1.0","source":{"id":"astro-ph/0303600","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0303600","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0303600v2","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0303600","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_12","alias_value":"RVNCCDSABIDC","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_16","alias_value":"RVNCCDSABIDCQKCD","created_at":"2026-07-04T16:36:45Z"},{"alias_kind":"pith_short_8","alias_value":"RVNCCDSA","created_at":"2026-07-04T16:36:45Z"}],"graph_snapshots":[{"event_id":"sha256:983be6e587e65f686ecff20331af5434b7692a5059f283f6635a95c2704cc2ef","target":"graph","created_at":"2026-07-04T16:36:45Z","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/0303600/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present near infrared J-, H- and K-band photometry and optical spectroscopy of low-mass star and brown dwarf (BD) candidates in the Pleiades and Praesepe open clusters. We find that Pleiades stars with K=10.5--13 are rather redder than the NextGen isochrones. We also identify this effect amongst alphaPer sources from the literature, but find no evidence of it for field stars from the literature. It is possible that the I-K colour of youthful stars is affected by the presence of magnetic activity. In the 2-colour diagram we find no colour change across the \"M dwarf gap\" (which would be indic","authors_text":"(2) University of Leicester, (3) Queen's University of Belfast), A. C. Katsiyannis (3) ((1) Liverpool John Moores University, D. J. Pinfield (1), H. R. A. Jones (1), I. A. Steele (1), P. D. Dobbie (2), R. F. Jameson (2)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-03-27T12:37:37Z","title":"Brown dwarfs and low-mass stars in the Pleiades and Praesepe:- Membership and binarity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0303600","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":"sha256:96de7808b386f4347ad11ab85317d598fd8e7cf15ec4e5383f3002b2aebc4881","target":"record","created_at":"2026-07-04T16:36:45Z","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":"4fe1a22a4afbde0d88fad487beb5c46071508768a15d213d21e655e870bad73c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-27T12:37:37Z","title_canon_sha256":"9c9a505d0dabfbe36a14f92ed30ef62a9fe401b35fc483481502f5a414d28c12"},"schema_version":"1.0","source":{"id":"astro-ph/0303600","kind":"arxiv","version":2}},"canonical_sha256":"8d5a210e400a06282843c50735807a9080aa29a186ea159ef8c82e66b6c65827","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d5a210e400a06282843c50735807a9080aa29a186ea159ef8c82e66b6c65827","first_computed_at":"2026-07-04T16:36:45.032457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:36:45.032457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oqxu4T3o5l0KJQKtUt6B3zBJWtMzr4WAYXlwDOEuMg4ifrW6j6vFAvEFig6iFusY6a064Gvm496Wkm8RNlrSAg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:36:45.032822Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0303600","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96de7808b386f4347ad11ab85317d598fd8e7cf15ec4e5383f3002b2aebc4881","sha256:983be6e587e65f686ecff20331af5434b7692a5059f283f6635a95c2704cc2ef"],"state_sha256":"ec83efb6cf6ed8d5a215aeccc73773d091699bb1a8a9e7315ba0fdd9e3b366d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1jvAFEQN7qC3p3dLeuSRT+NqllKDoI8attoYICQjZ91SFjTaeEqk+NDGnLtF+KfBkX0Ff19vKIy7gSbZVw8qAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T19:26:10.540321Z","bundle_sha256":"1c882f71e0761fe37767151264d6f62f9366a0aa919f25b09db2bd8616011fcc"}}