{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:UBIQ4YII233EV5YVBIRQPPO46U","short_pith_number":"pith:UBIQ4YII","canonical_record":{"source":{"id":"astro-ph/0504658","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-29T11:14:57Z","cross_cats_sorted":[],"title_canon_sha256":"5e97879ce29ac6e889fd1537bd02046a9732c7f3902e5c1c8b6afdecd3946c99","abstract_canon_sha256":"a0635bb05759f052bf9045a4a5c81bd266e898e06902f027f51430ac2c3f341a"},"schema_version":"1.0"},"canonical_sha256":"a0510e6108d6f64af7150a2307bddcf5290238910837f91ba4f9eff4bf6c3ccb","source":{"kind":"arxiv","id":"astro-ph/0504658","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504658","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504658v1","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504658","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"UBIQ4YII233E","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"UBIQ4YII233EV5YV","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"UBIQ4YII","created_at":"2026-05-18T12:25:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:UBIQ4YII233EV5YVBIRQPPO46U","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0504658","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-29T11:14:57Z","cross_cats_sorted":[],"title_canon_sha256":"5e97879ce29ac6e889fd1537bd02046a9732c7f3902e5c1c8b6afdecd3946c99","abstract_canon_sha256":"a0635bb05759f052bf9045a4a5c81bd266e898e06902f027f51430ac2c3f341a"},"schema_version":"1.0"},"canonical_sha256":"a0510e6108d6f64af7150a2307bddcf5290238910837f91ba4f9eff4bf6c3ccb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:25.674389Z","signature_b64":"w0PwAr06A36ZGLS7RuQaQQkYauYbRUIOty4PVHzcFsfVxV7yK3QHl5q6wMUuYGK4rQ5YK9Zen2uoeBEjJEVnDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0510e6108d6f64af7150a2307bddcf5290238910837f91ba4f9eff4bf6c3ccb","last_reissued_at":"2026-05-18T02:40:25.673908Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:25.673908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0504658","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":"2026-05-18T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wxOuMN/G4bn99o53j6L+vfsKLDXgWVXS6X3tSb7VD3vPtv5+NqH8jUnSfd0pJW+EIz2IwyLJbwt/Kv5NRetbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T11:10:55.871543Z"},"content_sha256":"286540d39e1a7452bbfe36492d8ad92cc017612b3962f404628c0ac5d6becc22","schema_version":"1.0","event_id":"sha256:286540d39e1a7452bbfe36492d8ad92cc017612b3962f404628c0ac5d6becc22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:UBIQ4YII233EV5YVBIRQPPO46U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A companion to AB Pic at the planet/brown dwarf boundary","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.-M. Lagrange, B. Zuckerman, C. Dumas, D. Mouillet, G. Chauvin, I. Song, J.-L. Beuzit, M.S. Bessell, P. Lowrance","submitted_at":"2005-04-29T11:14:57Z","abstract_excerpt":"We report deep imaging observations of the young, nearby star AB Pic, a member of the large Tucana-Horologium as sociation. We have detected a faint, red source 5.5\" South of the star with JHK colors compatible with that of a young substellar L dwarf. Follow-up observations at two additional epochs confirm, with a confidence level of 4.7sigma, that the faint red object is a companion to AB Pic rather than it being a stationary background object. A low resolution K-band spectrum indicates an early-L spectral type for the companion. Finally, evolutionary model predictions based on the JHK photom"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504658","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":"2026-05-18T02:40:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+j8BBJpeKo6o4koe1ju0yIekUbFhzJW4Qe4sGSk6SllU7vvXPtNtC7FMNgOauTa3jJJE1qxlfIXq75eDyVO1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T11:10:55.872226Z"},"content_sha256":"d701d38970bbd9d19c20d40b457d735bf795bd92c115a8e99ca43709fdff5bd8","schema_version":"1.0","event_id":"sha256:d701d38970bbd9d19c20d40b457d735bf795bd92c115a8e99ca43709fdff5bd8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UBIQ4YII233EV5YVBIRQPPO46U/bundle.json","state_url":"https://pith.science/pith/UBIQ4YII233EV5YVBIRQPPO46U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UBIQ4YII233EV5YVBIRQPPO46U/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":"2026-06-06T11:10:55Z","links":{"resolver":"https://pith.science/pith/UBIQ4YII233EV5YVBIRQPPO46U","bundle":"https://pith.science/pith/UBIQ4YII233EV5YVBIRQPPO46U/bundle.json","state":"https://pith.science/pith/UBIQ4YII233EV5YVBIRQPPO46U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UBIQ4YII233EV5YVBIRQPPO46U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:UBIQ4YII233EV5YVBIRQPPO46U","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":"a0635bb05759f052bf9045a4a5c81bd266e898e06902f027f51430ac2c3f341a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-29T11:14:57Z","title_canon_sha256":"5e97879ce29ac6e889fd1537bd02046a9732c7f3902e5c1c8b6afdecd3946c99"},"schema_version":"1.0","source":{"id":"astro-ph/0504658","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504658","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504658v1","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504658","created_at":"2026-05-18T02:40:25Z"},{"alias_kind":"pith_short_12","alias_value":"UBIQ4YII233E","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"UBIQ4YII233EV5YV","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"UBIQ4YII","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:d701d38970bbd9d19c20d40b457d735bf795bd92c115a8e99ca43709fdff5bd8","target":"graph","created_at":"2026-05-18T02:40:25Z","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 deep imaging observations of the young, nearby star AB Pic, a member of the large Tucana-Horologium as sociation. We have detected a faint, red source 5.5\" South of the star with JHK colors compatible with that of a young substellar L dwarf. Follow-up observations at two additional epochs confirm, with a confidence level of 4.7sigma, that the faint red object is a companion to AB Pic rather than it being a stationary background object. A low resolution K-band spectrum indicates an early-L spectral type for the companion. Finally, evolutionary model predictions based on the JHK photom","authors_text":"A.-M. Lagrange, B. Zuckerman, C. Dumas, D. Mouillet, G. Chauvin, I. Song, J.-L. Beuzit, M.S. Bessell, P. Lowrance","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-04-29T11:14:57Z","title":"A companion to AB Pic at the planet/brown dwarf boundary"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504658","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":"sha256:286540d39e1a7452bbfe36492d8ad92cc017612b3962f404628c0ac5d6becc22","target":"record","created_at":"2026-05-18T02:40:25Z","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":"a0635bb05759f052bf9045a4a5c81bd266e898e06902f027f51430ac2c3f341a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-29T11:14:57Z","title_canon_sha256":"5e97879ce29ac6e889fd1537bd02046a9732c7f3902e5c1c8b6afdecd3946c99"},"schema_version":"1.0","source":{"id":"astro-ph/0504658","kind":"arxiv","version":1}},"canonical_sha256":"a0510e6108d6f64af7150a2307bddcf5290238910837f91ba4f9eff4bf6c3ccb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0510e6108d6f64af7150a2307bddcf5290238910837f91ba4f9eff4bf6c3ccb","first_computed_at":"2026-05-18T02:40:25.673908Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:25.673908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w0PwAr06A36ZGLS7RuQaQQkYauYbRUIOty4PVHzcFsfVxV7yK3QHl5q6wMUuYGK4rQ5YK9Zen2uoeBEjJEVnDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:25.674389Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0504658","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:286540d39e1a7452bbfe36492d8ad92cc017612b3962f404628c0ac5d6becc22","sha256:d701d38970bbd9d19c20d40b457d735bf795bd92c115a8e99ca43709fdff5bd8"],"state_sha256":"287ef909f7fde4ec9ab49c8adaf55d8d105e1f7f145bf5914cef6a4ced42d5b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EAmNVR92p6V3lP8+gu5iBIZ2whvlyQqBi05cSRX7hgGrzosvyN0RzX7mkXygAFAvxeaKoqqo3xI6yqaCI9k/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T11:10:55.876099Z","bundle_sha256":"cda840499acbcd3c69ad8c0f565de2f2bad6e51a32ef839411649197de9228ed"}}