{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:L5UYEQHK2EYO66APBPF4AP6N4B","short_pith_number":"pith:L5UYEQHK","canonical_record":{"source":{"id":"1102.3914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-02-18T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"4527bf86b9d6355d2d02000d2b0e7344f93629b9ea1d81b0772d7dabd464b4fc","abstract_canon_sha256":"82fdcd967a10028e77a0809a8197b7a10694aa77c11b07cf805739074eddfbb2"},"schema_version":"1.0"},"canonical_sha256":"5f698240ead130ef780f0bcbc03fcde06938c2abad8698b05b4bb1a1bebce558","source":{"kind":"arxiv","id":"1102.3914","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.3914","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"arxiv_version","alias_value":"1102.3914v1","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.3914","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"pith_short_12","alias_value":"L5UYEQHK2EYO","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"L5UYEQHK2EYO66AP","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"L5UYEQHK","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:L5UYEQHK2EYO66APBPF4AP6N4B","target":"record","payload":{"canonical_record":{"source":{"id":"1102.3914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-02-18T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"4527bf86b9d6355d2d02000d2b0e7344f93629b9ea1d81b0772d7dabd464b4fc","abstract_canon_sha256":"82fdcd967a10028e77a0809a8197b7a10694aa77c11b07cf805739074eddfbb2"},"schema_version":"1.0"},"canonical_sha256":"5f698240ead130ef780f0bcbc03fcde06938c2abad8698b05b4bb1a1bebce558","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:09.253286Z","signature_b64":"UjZ7eC5P09u+VDmfAi7d88dVHqBtQ0E0A43v6o+qh82Xfoc3yFEklv9dZqyHgqmIrjL+l4pBISSJsfB1hI0iAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f698240ead130ef780f0bcbc03fcde06938c2abad8698b05b4bb1a1bebce558","last_reissued_at":"2026-05-18T02:03:09.252847Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:09.252847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.3914","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":"2026-05-18T02:03:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IlnL/kpRuC3WkiI2dLxfxQmHuFrZIiIqnETWIQVZlzZrhDxzUk96l2FVAZk2dC0UHNlL8DNgeNdTtpZj46TBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:51:26.387057Z"},"content_sha256":"f89ad8dabcbdf52fb2167a80bcb0e244198c9d9d354871f83538465227f9101f","schema_version":"1.0","event_id":"sha256:f89ad8dabcbdf52fb2167a80bcb0e244198c9d9d354871f83538465227f9101f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:L5UYEQHK2EYO66APBPF4AP6N4B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observational Constraints on Companions inside of 10 AU in the HR 8799 Planetary System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"2), (3) Sydney University, (4) Hubble Fellow, Adam L. Kraus (4) ((1) Caltech (2) Sagan Fellow, Institute for Astronomy, John M. Carpenter (1), Michael J. Ireland (3), Sasha Hinkley (1, University of Hawaii)","submitted_at":"2011-02-18T21:00:01Z","abstract_excerpt":"We report the results of Keck L'-band non-redundant aperture masking of HR 8799, a system with four confirmed planetary mass companions at projected orbital separations of 14 to 68 AU. We use these observations to place constraints on the presence of planets and brown dwarfs at projected orbital separations inside of 10 AU---separations out of reach to more conventional direct imaging methods. No companions were detected at better than 99% confidence between orbital separations of 0.8 to 10 AU. Assuming an age of 30 Myr and adopting the Baraffe models, we place upper limits to planetary mass c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.3914","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":"2026-05-18T02:03:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0SMXFAImzJLQj1Vb7L5Ov6O1hdF/IMIyOhOZ9nP9ah9cf2O0t+qFdIclkx6LRLlfqz326LP6Tv+VQdK+UFm2Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:51:26.387417Z"},"content_sha256":"6c2baa7449d2b81eb920aec2dab1b59c5f906966fcae7378e0f8c5f4331a051b","schema_version":"1.0","event_id":"sha256:6c2baa7449d2b81eb920aec2dab1b59c5f906966fcae7378e0f8c5f4331a051b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5UYEQHK2EYO66APBPF4AP6N4B/bundle.json","state_url":"https://pith.science/pith/L5UYEQHK2EYO66APBPF4AP6N4B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5UYEQHK2EYO66APBPF4AP6N4B/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":"2026-05-30T18:51:26Z","links":{"resolver":"https://pith.science/pith/L5UYEQHK2EYO66APBPF4AP6N4B","bundle":"https://pith.science/pith/L5UYEQHK2EYO66APBPF4AP6N4B/bundle.json","state":"https://pith.science/pith/L5UYEQHK2EYO66APBPF4AP6N4B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5UYEQHK2EYO66APBPF4AP6N4B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:L5UYEQHK2EYO66APBPF4AP6N4B","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":"82fdcd967a10028e77a0809a8197b7a10694aa77c11b07cf805739074eddfbb2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-02-18T21:00:01Z","title_canon_sha256":"4527bf86b9d6355d2d02000d2b0e7344f93629b9ea1d81b0772d7dabd464b4fc"},"schema_version":"1.0","source":{"id":"1102.3914","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.3914","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"arxiv_version","alias_value":"1102.3914v1","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.3914","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"pith_short_12","alias_value":"L5UYEQHK2EYO","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"L5UYEQHK2EYO66AP","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"L5UYEQHK","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:6c2baa7449d2b81eb920aec2dab1b59c5f906966fcae7378e0f8c5f4331a051b","target":"graph","created_at":"2026-05-18T02:03:09Z","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"},"paper":{"abstract_excerpt":"We report the results of Keck L'-band non-redundant aperture masking of HR 8799, a system with four confirmed planetary mass companions at projected orbital separations of 14 to 68 AU. We use these observations to place constraints on the presence of planets and brown dwarfs at projected orbital separations inside of 10 AU---separations out of reach to more conventional direct imaging methods. No companions were detected at better than 99% confidence between orbital separations of 0.8 to 10 AU. Assuming an age of 30 Myr and adopting the Baraffe models, we place upper limits to planetary mass c","authors_text":"2), (3) Sydney University, (4) Hubble Fellow, Adam L. Kraus (4) ((1) Caltech (2) Sagan Fellow, Institute for Astronomy, John M. Carpenter (1), Michael J. Ireland (3), Sasha Hinkley (1, University of Hawaii)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-02-18T21:00:01Z","title":"Observational Constraints on Companions inside of 10 AU in the HR 8799 Planetary System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.3914","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:f89ad8dabcbdf52fb2167a80bcb0e244198c9d9d354871f83538465227f9101f","target":"record","created_at":"2026-05-18T02:03:09Z","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":"82fdcd967a10028e77a0809a8197b7a10694aa77c11b07cf805739074eddfbb2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-02-18T21:00:01Z","title_canon_sha256":"4527bf86b9d6355d2d02000d2b0e7344f93629b9ea1d81b0772d7dabd464b4fc"},"schema_version":"1.0","source":{"id":"1102.3914","kind":"arxiv","version":1}},"canonical_sha256":"5f698240ead130ef780f0bcbc03fcde06938c2abad8698b05b4bb1a1bebce558","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f698240ead130ef780f0bcbc03fcde06938c2abad8698b05b4bb1a1bebce558","first_computed_at":"2026-05-18T02:03:09.252847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:09.252847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UjZ7eC5P09u+VDmfAi7d88dVHqBtQ0E0A43v6o+qh82Xfoc3yFEklv9dZqyHgqmIrjL+l4pBISSJsfB1hI0iAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:09.253286Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.3914","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f89ad8dabcbdf52fb2167a80bcb0e244198c9d9d354871f83538465227f9101f","sha256:6c2baa7449d2b81eb920aec2dab1b59c5f906966fcae7378e0f8c5f4331a051b"],"state_sha256":"e543251dab4e45a4426efc642e6235e2fbf2c3c3bdb19c282693680a999c5327"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N+e4usjcE6/ozRI1kU6Y3PBmuADkOHJEiUxn1orqSdLtTnFbGkX0rKJCvIgUgFNt4aU+nYTNc3sLa/XQfXxTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T18:51:26.389330Z","bundle_sha256":"acd497562c6857476ada3e7b0ee78fac7130139f77fd4057fca7767d3e508d30"}}