{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:PBPBVAQGJ74QNP3RYQVFTSUDYS","short_pith_number":"pith:PBPBVAQG","canonical_record":{"source":{"id":"0906.4145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-06-23T00:18:14Z","cross_cats_sorted":[],"title_canon_sha256":"369f26e0e96b9313698b3f814c599655c151946ff8b4f47503f043f18475be3f","abstract_canon_sha256":"439960c551ec4bde82a6af79c44a43a1020fa8a1f7a9ea9ee68dbeb1ce38172c"},"schema_version":"1.0"},"canonical_sha256":"785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf","source":{"kind":"arxiv","id":"0906.4145","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4145","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4145v1","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4145","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"pith_short_12","alias_value":"PBPBVAQGJ74Q","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"PBPBVAQGJ74QNP3R","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"PBPBVAQG","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:PBPBVAQGJ74QNP3RYQVFTSUDYS","target":"record","payload":{"canonical_record":{"source":{"id":"0906.4145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-06-23T00:18:14Z","cross_cats_sorted":[],"title_canon_sha256":"369f26e0e96b9313698b3f814c599655c151946ff8b4f47503f043f18475be3f","abstract_canon_sha256":"439960c551ec4bde82a6af79c44a43a1020fa8a1f7a9ea9ee68dbeb1ce38172c"},"schema_version":"1.0"},"canonical_sha256":"785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:13.273427Z","signature_b64":"dnuG8MkV8x7X6zYQzVnpW9feUOn3mnpoWZYzRRqsP3V9DR64HwQGPYTHuQ/vUqo4GMHX4Owp/4uKXI+qM/6wAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf","last_reissued_at":"2026-05-18T02:13:13.272987Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:13.272987Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.4145","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":"2026-05-18T02:13:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bEgyUAVr9t6GfmI9fbKwhc0yToFVyD3Emhxyt1PLHwADO/qgxNjkQTAI3KEo7jJb+pexbNLF6gjt7w12fk39BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T12:00:35.155508Z"},"content_sha256":"7f45bafa484c62b8e211ea3ccb44786c1db9446fa5b1eb9fb2efb1f314a96874","schema_version":"1.0","event_id":"sha256:7f45bafa484c62b8e211ea3ccb44786c1db9446fa5b1eb9fb2efb1f314a96874"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:PBPBVAQGJ74QNP3RYQVFTSUDYS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Imaging search for the unseen companion to Eps Ind A -- Improving the detection limits with 4 micron observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"D. Apai, D. Lafreniere, K. Geissler, M. Endl, M. Janson, M. Kasper, M. Kuerster, M. Zechmeister, S. Hippler, S. Reffert, Th. Henning, W. Brandner","submitted_at":"2009-06-23T00:18:14Z","abstract_excerpt":"Eps Ind A is one of the nearest sun-like stars, located only 3.6 pc away. It is known to host a binary brown dwarf companion, Eps Ind Ba/Bb, at a large projected separation of 6.7\", but radial velocity measurements imply that an additional, yet unseen component is present in the system, much closer to Eps Ind A. Previous direct imaging has excluded the presence of any stellar or high-mass brown dwarf companion at small separations, indicating that the unseen companion may be a low-mass brown dwarf or high-mass planet. We present the results of a deep high-contrast imaging search for the compan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4145","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":"2026-05-18T02:13:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6ljD5/eIs2b1I9mFAGAAx1p/SaYAfsyaVX1s6p72YtFYIjpzOwjj7XAdRHY3BwFFfxfSIKmp3g4fIck0A99WCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T12:00:35.156239Z"},"content_sha256":"bbe96013fb55310433a40283cde47d5e92f7d4d0e40fca15e15f979e86c00c9f","schema_version":"1.0","event_id":"sha256:bbe96013fb55310433a40283cde47d5e92f7d4d0e40fca15e15f979e86c00c9f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/bundle.json","state_url":"https://pith.science/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/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":"2026-05-23T12:00:35Z","links":{"resolver":"https://pith.science/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS","bundle":"https://pith.science/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/bundle.json","state":"https://pith.science/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PBPBVAQGJ74QNP3RYQVFTSUDYS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:PBPBVAQGJ74QNP3RYQVFTSUDYS","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":"439960c551ec4bde82a6af79c44a43a1020fa8a1f7a9ea9ee68dbeb1ce38172c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-06-23T00:18:14Z","title_canon_sha256":"369f26e0e96b9313698b3f814c599655c151946ff8b4f47503f043f18475be3f"},"schema_version":"1.0","source":{"id":"0906.4145","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4145","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4145v1","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4145","created_at":"2026-05-18T02:13:13Z"},{"alias_kind":"pith_short_12","alias_value":"PBPBVAQGJ74Q","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"PBPBVAQGJ74QNP3R","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"PBPBVAQG","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:bbe96013fb55310433a40283cde47d5e92f7d4d0e40fca15e15f979e86c00c9f","target":"graph","created_at":"2026-05-18T02:13:13Z","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":"Eps Ind A is one of the nearest sun-like stars, located only 3.6 pc away. It is known to host a binary brown dwarf companion, Eps Ind Ba/Bb, at a large projected separation of 6.7\", but radial velocity measurements imply that an additional, yet unseen component is present in the system, much closer to Eps Ind A. Previous direct imaging has excluded the presence of any stellar or high-mass brown dwarf companion at small separations, indicating that the unseen companion may be a low-mass brown dwarf or high-mass planet. We present the results of a deep high-contrast imaging search for the compan","authors_text":"D. Apai, D. Lafreniere, K. Geissler, M. Endl, M. Janson, M. Kasper, M. Kuerster, M. Zechmeister, S. Hippler, S. Reffert, Th. Henning, W. Brandner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-06-23T00:18:14Z","title":"Imaging search for the unseen companion to Eps Ind A -- Improving the detection limits with 4 micron observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4145","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":"sha256:7f45bafa484c62b8e211ea3ccb44786c1db9446fa5b1eb9fb2efb1f314a96874","target":"record","created_at":"2026-05-18T02:13:13Z","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":"439960c551ec4bde82a6af79c44a43a1020fa8a1f7a9ea9ee68dbeb1ce38172c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2009-06-23T00:18:14Z","title_canon_sha256":"369f26e0e96b9313698b3f814c599655c151946ff8b4f47503f043f18475be3f"},"schema_version":"1.0","source":{"id":"0906.4145","kind":"arxiv","version":1}},"canonical_sha256":"785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"785e1a82064ff906bf71c42a59ca83c498f2a5ac905c81cba18b2848ef7e4bcf","first_computed_at":"2026-05-18T02:13:13.272987Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:13.272987Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dnuG8MkV8x7X6zYQzVnpW9feUOn3mnpoWZYzRRqsP3V9DR64HwQGPYTHuQ/vUqo4GMHX4Owp/4uKXI+qM/6wAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:13.273427Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.4145","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f45bafa484c62b8e211ea3ccb44786c1db9446fa5b1eb9fb2efb1f314a96874","sha256:bbe96013fb55310433a40283cde47d5e92f7d4d0e40fca15e15f979e86c00c9f"],"state_sha256":"aa0746e3218ff0ee5dd725bceaf9060a51cf73337c10006e8f627ec736865f05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sP+Z1fkbbfvVcdxeOi0T+weTeQiCB2H5OX9w2Kov+VkFvJea25pMcuzYSATmfgjGBLa0ymBCNcVYlmAq8lbIBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T12:00:35.160023Z","bundle_sha256":"3a9bc57a2f83cd7f7d15f8d253ae34d838091e0af4d050fe8a82e5cb302bf5b3"}}