{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VGFFJ3LDBSSDVE5XW3L4A6C7D4","short_pith_number":"pith:VGFFJ3LD","canonical_record":{"source":{"id":"1608.06908","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-24T17:58:33Z","cross_cats_sorted":[],"title_canon_sha256":"a9f39a61882d833328506501f9077a89a664cf4ae03dea846543d073d8260b78","abstract_canon_sha256":"e9102555f585515b286f9b41eaa5a5db0b29da8147b78dd8625c9d5b541eb560"},"schema_version":"1.0"},"canonical_sha256":"a98a54ed630ca43a93b7b6d7c0785f1f1bc94851a1ba0f02ab5104a94863463a","source":{"kind":"arxiv","id":"1608.06908","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.06908","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"arxiv_version","alias_value":"1608.06908v3","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.06908","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"pith_short_12","alias_value":"VGFFJ3LDBSSD","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VGFFJ3LDBSSDVE5X","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VGFFJ3LD","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VGFFJ3LDBSSDVE5XW3L4A6C7D4","target":"record","payload":{"canonical_record":{"source":{"id":"1608.06908","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-24T17:58:33Z","cross_cats_sorted":[],"title_canon_sha256":"a9f39a61882d833328506501f9077a89a664cf4ae03dea846543d073d8260b78","abstract_canon_sha256":"e9102555f585515b286f9b41eaa5a5db0b29da8147b78dd8625c9d5b541eb560"},"schema_version":"1.0"},"canonical_sha256":"a98a54ed630ca43a93b7b6d7c0785f1f1bc94851a1ba0f02ab5104a94863463a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:46.970669Z","signature_b64":"IdYTNfyd2sniyejDBHKvLzUeXDNDxk8tPZGeRDCGhkNkuVzl7YjLOn3MKBJxXYBpMaeaegJhOApduzjTXMYcCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a98a54ed630ca43a93b7b6d7c0785f1f1bc94851a1ba0f02ab5104a94863463a","last_reissued_at":"2026-05-18T00:51:46.969912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:46.969912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.06908","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:51:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ox456QW6JbBb5PlGsdbLxBXhCgk1/vqX6HCCl8rffWSac+Ch6w0FQJyXY+qtspu1Ucc2kxyhs6BXmHJwQ1ZYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:07.439873Z"},"content_sha256":"bc8094be2bbffb65527432b51d6913f075692508b75222b5655259a1ecccf8dc","schema_version":"1.0","event_id":"sha256:bc8094be2bbffb65527432b51d6913f075692508b75222b5655259a1ecccf8dc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VGFFJ3LDBSSDVE5XW3L4A6C7D4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exploring plausible formation scenarios for the planet candidate orbiting Proxima Centauri","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Benjamin Giesers, Gavin A. L. Coleman, Guillem Anglada-Escude, Richard P. Nelson, Sijme-Jan Paardekooper, Stefan Dreizler","submitted_at":"2016-08-24T17:58:33Z","abstract_excerpt":"We present a study of four different formation scenarios that may be able to explain the origin of the recently announced planet (`Proxima b') orbiting Proxima Centauri. The aim is to examine how the formation scenarios differ in their predictions for the multiplicity of the Proxima system, the water/volatile content of Proxima b and its orbital eccentricity, so that these can be tested by future observations. A scenario of in situ formation via giant impacts from a locally enhanced disc of planetary embryos/planetesimals predicts that Proxima b will be in a multiplanet system with a measurabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.06908","kind":"arxiv","version":3},"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":"2026-05-18T00:51:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XTpuJZ2vKS+5phdFpNQap+JKjgvTUzaVk1r73On/1Ql0nHfxDytaTT/lyLye5YYyj/MWAPQ2DchogIv8AcfnCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:37:07.440537Z"},"content_sha256":"131702f6cb7c738a6a972852a556ef8c03c029db1f802ba17d1c3d3010d41373","schema_version":"1.0","event_id":"sha256:131702f6cb7c738a6a972852a556ef8c03c029db1f802ba17d1c3d3010d41373"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/bundle.json","state_url":"https://pith.science/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/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":"2026-05-25T16:37:07Z","links":{"resolver":"https://pith.science/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4","bundle":"https://pith.science/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/bundle.json","state":"https://pith.science/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGFFJ3LDBSSDVE5XW3L4A6C7D4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VGFFJ3LDBSSDVE5XW3L4A6C7D4","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":"e9102555f585515b286f9b41eaa5a5db0b29da8147b78dd8625c9d5b541eb560","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-24T17:58:33Z","title_canon_sha256":"a9f39a61882d833328506501f9077a89a664cf4ae03dea846543d073d8260b78"},"schema_version":"1.0","source":{"id":"1608.06908","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.06908","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"arxiv_version","alias_value":"1608.06908v3","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.06908","created_at":"2026-05-18T00:51:46Z"},{"alias_kind":"pith_short_12","alias_value":"VGFFJ3LDBSSD","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VGFFJ3LDBSSDVE5X","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VGFFJ3LD","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:131702f6cb7c738a6a972852a556ef8c03c029db1f802ba17d1c3d3010d41373","target":"graph","created_at":"2026-05-18T00:51:46Z","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 present a study of four different formation scenarios that may be able to explain the origin of the recently announced planet (`Proxima b') orbiting Proxima Centauri. The aim is to examine how the formation scenarios differ in their predictions for the multiplicity of the Proxima system, the water/volatile content of Proxima b and its orbital eccentricity, so that these can be tested by future observations. A scenario of in situ formation via giant impacts from a locally enhanced disc of planetary embryos/planetesimals predicts that Proxima b will be in a multiplanet system with a measurabl","authors_text":"Benjamin Giesers, Gavin A. L. Coleman, Guillem Anglada-Escude, Richard P. Nelson, Sijme-Jan Paardekooper, Stefan Dreizler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-24T17:58:33Z","title":"Exploring plausible formation scenarios for the planet candidate orbiting Proxima Centauri"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.06908","kind":"arxiv","version":3},"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:bc8094be2bbffb65527432b51d6913f075692508b75222b5655259a1ecccf8dc","target":"record","created_at":"2026-05-18T00:51:46Z","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":"e9102555f585515b286f9b41eaa5a5db0b29da8147b78dd8625c9d5b541eb560","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-08-24T17:58:33Z","title_canon_sha256":"a9f39a61882d833328506501f9077a89a664cf4ae03dea846543d073d8260b78"},"schema_version":"1.0","source":{"id":"1608.06908","kind":"arxiv","version":3}},"canonical_sha256":"a98a54ed630ca43a93b7b6d7c0785f1f1bc94851a1ba0f02ab5104a94863463a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a98a54ed630ca43a93b7b6d7c0785f1f1bc94851a1ba0f02ab5104a94863463a","first_computed_at":"2026-05-18T00:51:46.969912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:46.969912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IdYTNfyd2sniyejDBHKvLzUeXDNDxk8tPZGeRDCGhkNkuVzl7YjLOn3MKBJxXYBpMaeaegJhOApduzjTXMYcCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:46.970669Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.06908","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc8094be2bbffb65527432b51d6913f075692508b75222b5655259a1ecccf8dc","sha256:131702f6cb7c738a6a972852a556ef8c03c029db1f802ba17d1c3d3010d41373"],"state_sha256":"f9eac77404c1262d65bede8973ba4d3631b183d0a11ec928767b7eeb3f4f8e8b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qqxMfz2zEpsg2Vr7f2Y8Trk9/dEdMzq1Pxtk5TG2jv22xPhLq7gQpN0FVZ2bWOd5Kq57e/u65Er1Li9wiy+rCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:37:07.444413Z","bundle_sha256":"94dfa6776346da69dce6e76ffe6bdaff232bb941937edda4382b378c0d87119a"}}