{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7SLJ23KXUQIQPNVHFKQRKHRSQP","short_pith_number":"pith:7SLJ23KX","canonical_record":{"source":{"id":"1603.06224","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","cross_cats_sorted":[],"title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c","abstract_canon_sha256":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec"},"schema_version":"1.0"},"canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","source":{"kind":"arxiv","id":"1603.06224","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06224v2","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"7SLJ23KXUQIQ","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7SLJ23KXUQIQPNVH","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7SLJ23KX","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7SLJ23KXUQIQPNVHFKQRKHRSQP","target":"record","payload":{"canonical_record":{"source":{"id":"1603.06224","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","cross_cats_sorted":[],"title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c","abstract_canon_sha256":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec"},"schema_version":"1.0"},"canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:34.007784Z","signature_b64":"HJmMqenYEshZuREWf38cNextgiMaq3YFtseP1bjseOPu3CWe5qCwP/NHY/iBPltwnBgnpht2x/+vqbaWIJgRCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","last_reissued_at":"2026-05-18T01:15:34.007141Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:34.007141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.06224","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":"2026-05-18T01:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/I2EcOKbsAAgY8Lhn0N/4YL7n277IWftStRdTGePo8uEgcpuOUsXRcEQrhOVpiGFEdcd91tqcCNGV1klQ77rCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:00:03.335899Z"},"content_sha256":"70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d","schema_version":"1.0","event_id":"sha256:70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7SLJ23KXUQIQPNVHFKQRKHRSQP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interpreting the Densities of the Kuiper Belt's Dwarf Planets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Amy C. Barr, Megan E. Schwamb","submitted_at":"2016-03-20T14:54:02Z","abstract_excerpt":"Kuiper Belt objects with absolute magnitude less than 3 (radius $\\gtrsim$500 km), the dwarf planets, have a range of different ice/rock ratios, and are more rock-rich than their smaller counterparts. Many of these objects have moons, which suggests that collisions may have played a role in modifying their compositions. We show that the dwarf planets fall into two categories when analysed by their mean densities and satellite-to-primary size ratio. Systems with large moons, such as Pluto/Charon and Orcus/Vanth, can form in low-velocity grazing collisions in which both bodies retain their compos"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06224","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":""},"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":"2026-05-18T01:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rl7EWO71YSqJAydhnzI3QlcwZ1XlS3U4+R7yKoXmTrKqh7B0XvWZPpztMQ8VcdHmPfVsOBljTi3zVlJ93L0KAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:00:03.336481Z"},"content_sha256":"6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942","schema_version":"1.0","event_id":"sha256:6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/bundle.json","state_url":"https://pith.science/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/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":"2026-05-25T08:00:03Z","links":{"resolver":"https://pith.science/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP","bundle":"https://pith.science/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/bundle.json","state":"https://pith.science/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7SLJ23KXUQIQPNVHFKQRKHRSQP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7SLJ23KXUQIQPNVHFKQRKHRSQP","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":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c"},"schema_version":"1.0","source":{"id":"1603.06224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"1603.06224v2","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.06224","created_at":"2026-05-18T01:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"7SLJ23KXUQIQ","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7SLJ23KXUQIQPNVH","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7SLJ23KX","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942","target":"graph","created_at":"2026-05-18T01:15:34Z","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":"Kuiper Belt objects with absolute magnitude less than 3 (radius $\\gtrsim$500 km), the dwarf planets, have a range of different ice/rock ratios, and are more rock-rich than their smaller counterparts. Many of these objects have moons, which suggests that collisions may have played a role in modifying their compositions. We show that the dwarf planets fall into two categories when analysed by their mean densities and satellite-to-primary size ratio. Systems with large moons, such as Pluto/Charon and Orcus/Vanth, can form in low-velocity grazing collisions in which both bodies retain their compos","authors_text":"Amy C. Barr, Megan E. Schwamb","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title":"Interpreting the Densities of the Kuiper Belt's Dwarf Planets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06224","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":"sha256:70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d","target":"record","created_at":"2026-05-18T01:15:34Z","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":"ba5adef5443ea5469812c4c8ae99d9af68db69bbd821c2428ae11c2b3d34a1ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-20T14:54:02Z","title_canon_sha256":"9cad39d7c0ecef6c0199933691ba57e1e4d2aee362d024cf82ad26df149cd71c"},"schema_version":"1.0","source":{"id":"1603.06224","kind":"arxiv","version":2}},"canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc969d6d57a41107b6a72aa1151e3283c687c21a48ce369b1999aec8783252ae","first_computed_at":"2026-05-18T01:15:34.007141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:34.007141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HJmMqenYEshZuREWf38cNextgiMaq3YFtseP1bjseOPu3CWe5qCwP/NHY/iBPltwnBgnpht2x/+vqbaWIJgRCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:34.007784Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.06224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70529797757dcececc7b07dafa970f253bc8723dada4c1813e6dad1074860c0d","sha256:6fd9b198874498d88f5c554465e2bf794af1925b9197936a8b816ea15f432942"],"state_sha256":"6a60f5e081098dc51a6897f53693b0e0fb5de471713198d75898291905de9e2d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3mj8h3q2J3835YuFb5ARZgrK30k3qQhhW43uMCOviTz5z/qyLgZQDsy0Ir8JKTftpGp67lHi+Q3HoHUQ3ZiTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:00:03.339662Z","bundle_sha256":"fc807fbb1a2c9e0b1bca1970243b1f32fb309982ca015948143ff1466e9fdf94"}}