{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:ZUM5KJPTGSODBK4FW2TAPETNZL","short_pith_number":"pith:ZUM5KJPT","canonical_record":{"source":{"id":"astro-ph/0512449","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-17T18:32:08Z","cross_cats_sorted":[],"title_canon_sha256":"8f9085eb064ff71430689d9a019d3aa61cce914a6287b4c1794ca2bcc96cc03f","abstract_canon_sha256":"aa95f448ea6de4a7ac4041ea7c260e4a55dd30089d4481525f16d108c0b86abe"},"schema_version":"1.0"},"canonical_sha256":"cd19d525f3349c30ab85b6a607926dcac7fa06ac84baa83b29511e1fb3577a7f","source":{"kind":"arxiv","id":"astro-ph/0512449","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512449","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512449v2","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512449","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_12","alias_value":"ZUM5KJPTGSOD","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZUM5KJPTGSODBK4F","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZUM5KJPT","created_at":"2026-07-04T16:53:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:ZUM5KJPTGSODBK4FW2TAPETNZL","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0512449","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-17T18:32:08Z","cross_cats_sorted":[],"title_canon_sha256":"8f9085eb064ff71430689d9a019d3aa61cce914a6287b4c1794ca2bcc96cc03f","abstract_canon_sha256":"aa95f448ea6de4a7ac4041ea7c260e4a55dd30089d4481525f16d108c0b86abe"},"schema_version":"1.0"},"canonical_sha256":"cd19d525f3349c30ab85b6a607926dcac7fa06ac84baa83b29511e1fb3577a7f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:53:09.905054Z","signature_b64":"QbpPVRGebtp4+yXrzqA9CHKCnKHbxk9zS6/FAMm1X3bh9NMDXbW+R+Aq8d9FmtnJ6O500SNvjXK+OiJDZGptBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd19d525f3349c30ab85b6a607926dcac7fa06ac84baa83b29511e1fb3577a7f","last_reissued_at":"2026-07-04T16:53:09.904684Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:53:09.904684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0512449","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":"2026-07-04T16:53:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WxIDcjQlZAmPNH0xTkbVBtRXi6iTHweOhmSVN/Qw0rUIY4sKLLMN6+MJyWlt8wTMYGs4G/yeE1CAXeZ66kJvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:15:27.855396Z"},"content_sha256":"a0e2813655701f9cff05b58271051f9c393763dc44a936a859d48194bed064e3","schema_version":"1.0","event_id":"sha256:a0e2813655701f9cff05b58271051f9c393763dc44a936a859d48194bed064e3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:ZUM5KJPTGSODBK4FW2TAPETNZL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), C.D. Mackay (IOA, N.M. Law, S.T. Hodgkin","submitted_at":"2005-12-17T18:32:08Z","abstract_excerpt":"We survey a sample of 32 M5-M8 stars with distance < 40pc for companions with separations between 0.1 arcsec and 1.5 arcsec and with Delta m_i <5. We find five new VLM binaries with separations between 0.15 arcsec and 1.1 arcsec, including a candidate brown dwarf companion. The raw binary fraction is 16% +8/-4% and the distance bias corrected fraction is 7% +7/-3%, for companions within the surveyed range. No systems with contrast ratio Delta m_i>1 were found, even though our survey is sensitive to up to Delta m=5 (well into the brown dwarf regime). The distribution of orbital radii is in broa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512449","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/0512449/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":"2026-07-04T16:53:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Mj2LIWSkxJCYpYpkAAODfwFla+D3TBRWofzcqYqZEMZcqAhWkh5icz7zfr8E1Erya2QWzMukCac7JEKtLjdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:15:27.855869Z"},"content_sha256":"4c8e33d618980112855d3073b646840ceec4eef78ede7d89df3b98657c594b42","schema_version":"1.0","event_id":"sha256:4c8e33d618980112855d3073b646840ceec4eef78ede7d89df3b98657c594b42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/bundle.json","state_url":"https://pith.science/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/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":"2026-08-05T07:15:27Z","links":{"resolver":"https://pith.science/pith/ZUM5KJPTGSODBK4FW2TAPETNZL","bundle":"https://pith.science/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/bundle.json","state":"https://pith.science/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZUM5KJPTGSODBK4FW2TAPETNZL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:ZUM5KJPTGSODBK4FW2TAPETNZL","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":"aa95f448ea6de4a7ac4041ea7c260e4a55dd30089d4481525f16d108c0b86abe","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-17T18:32:08Z","title_canon_sha256":"8f9085eb064ff71430689d9a019d3aa61cce914a6287b4c1794ca2bcc96cc03f"},"schema_version":"1.0","source":{"id":"astro-ph/0512449","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512449","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512449v2","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512449","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_12","alias_value":"ZUM5KJPTGSOD","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZUM5KJPTGSODBK4F","created_at":"2026-07-04T16:53:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZUM5KJPT","created_at":"2026-07-04T16:53:09Z"}],"graph_snapshots":[{"event_id":"sha256:4c8e33d618980112855d3073b646840ceec4eef78ede7d89df3b98657c594b42","target":"graph","created_at":"2026-07-04T16:53:09Z","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/0512449/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We survey a sample of 32 M5-M8 stars with distance < 40pc for companions with separations between 0.1 arcsec and 1.5 arcsec and with Delta m_i <5. We find five new VLM binaries with separations between 0.15 arcsec and 1.1 arcsec, including a candidate brown dwarf companion. The raw binary fraction is 16% +8/-4% and the distance bias corrected fraction is 7% +7/-3%, for companions within the surveyed range. No systems with contrast ratio Delta m_i>1 were found, even though our survey is sensitive to up to Delta m=5 (well into the brown dwarf regime). The distribution of orbital radii is in broa","authors_text":"Cambridge), C.D. Mackay (IOA, N.M. Law, S.T. Hodgkin","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-12-17T18:32:08Z","title":"Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512449","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:a0e2813655701f9cff05b58271051f9c393763dc44a936a859d48194bed064e3","target":"record","created_at":"2026-07-04T16:53:09Z","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":"aa95f448ea6de4a7ac4041ea7c260e4a55dd30089d4481525f16d108c0b86abe","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-17T18:32:08Z","title_canon_sha256":"8f9085eb064ff71430689d9a019d3aa61cce914a6287b4c1794ca2bcc96cc03f"},"schema_version":"1.0","source":{"id":"astro-ph/0512449","kind":"arxiv","version":2}},"canonical_sha256":"cd19d525f3349c30ab85b6a607926dcac7fa06ac84baa83b29511e1fb3577a7f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd19d525f3349c30ab85b6a607926dcac7fa06ac84baa83b29511e1fb3577a7f","first_computed_at":"2026-07-04T16:53:09.904684Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:53:09.904684Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QbpPVRGebtp4+yXrzqA9CHKCnKHbxk9zS6/FAMm1X3bh9NMDXbW+R+Aq8d9FmtnJ6O500SNvjXK+OiJDZGptBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:53:09.905054Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0512449","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0e2813655701f9cff05b58271051f9c393763dc44a936a859d48194bed064e3","sha256:4c8e33d618980112855d3073b646840ceec4eef78ede7d89df3b98657c594b42"],"state_sha256":"66bba975b25c82b452ac83445eb6985bc519c3d7dbd0131c440db9f0cf5633c9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rCD9sEvuOn8QGeSLxpQhirHFPnsj/Gz7nFQ92zJq3jhzMzEXo/8/MDUU3G+XT5Ab47uaDNT/yfIpiqQIZO6ZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T07:15:27.858984Z","bundle_sha256":"253ec8ce663fa2f1bd12c9701d6657f3b893465e39d300dd6e529c20f2f4d013"}}