{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RZQQ4WHKCNOVA53SYRYS4MWQYU","short_pith_number":"pith:RZQQ4WHK","canonical_record":{"source":{"id":"1902.05949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-15T17:59:43Z","cross_cats_sorted":[],"title_canon_sha256":"075281f772b5182558a7f1daa105fefdcdc7e28654819e539d2f06b90de28b96","abstract_canon_sha256":"8cdb28376bad815a947963b1b79e5871b9bc0e557cb9c133d8d0d836bd141f36"},"schema_version":"1.0"},"canonical_sha256":"8e610e58ea135d507772c4712e32d0c5290c1223589a1829a3f2cb269d228465","source":{"kind":"arxiv","id":"1902.05949","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.05949","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"arxiv_version","alias_value":"1902.05949v1","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.05949","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"pith_short_12","alias_value":"RZQQ4WHKCNOV","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RZQQ4WHKCNOVA53S","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RZQQ4WHK","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RZQQ4WHKCNOVA53SYRYS4MWQYU","target":"record","payload":{"canonical_record":{"source":{"id":"1902.05949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-15T17:59:43Z","cross_cats_sorted":[],"title_canon_sha256":"075281f772b5182558a7f1daa105fefdcdc7e28654819e539d2f06b90de28b96","abstract_canon_sha256":"8cdb28376bad815a947963b1b79e5871b9bc0e557cb9c133d8d0d836bd141f36"},"schema_version":"1.0"},"canonical_sha256":"8e610e58ea135d507772c4712e32d0c5290c1223589a1829a3f2cb269d228465","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:49.138058Z","signature_b64":"Gq4zRQDA2c/0llEcMN8rn5IVtC6QY16IAapL72KQ7kFSEUckHhtSFiPF2T53CpR2Zlzg9GtH4KnK+wFpMqzJDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e610e58ea135d507772c4712e32d0c5290c1223589a1829a3f2cb269d228465","last_reissued_at":"2026-05-17T23:53:49.137455Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:49.137455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.05949","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":"2026-05-17T23:53:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RESaH6c8wyneWYCNrwA2vCk7/43Io1hbSoi/t8hoiFtt9/FBBPnEp626s1h7yqPWqQ+iOO9iu9qdzDOl/C0oCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T12:15:01.348966Z"},"content_sha256":"fb4a493f0f4cc16bbdc7a50ce01362e557b1494797ba223980ba95552c8771d4","schema_version":"1.0","event_id":"sha256:fb4a493f0f4cc16bbdc7a50ce01362e557b1494797ba223980ba95552c8771d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RZQQ4WHKCNOVA53SYRYS4MWQYU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analytical model for the dynamical motion of the bulges of two interacting galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Elkin L. L\\'opez, Gustavo V. L\\'opez, Simon N. Kemp","submitted_at":"2019-02-15T17:59:43Z","abstract_excerpt":"Two mathematical models of three bodies of variable masses are used to obtain a qualitative description of two interacting galaxies with mass exchange and mass loss. The reference system is centred on the largest body (the most massive galaxy), and the other two bodies are allowed to move around this one under the laws of gravity. The third body, which simulated the mass lost by the second galaxy in the form of a tail, increases its mass due to the mass lost by the second body and follows its trajectory. We are interested in knowing the time evolution of the separation of the two bulges of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05949","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":"2026-05-17T23:53:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"icnQYStCqVTGLoSf+4WneQDx2avw1gwKusGUsZqRf/rBUuWjpOe7TZ8ndXj+Sz3LuC8pILGSg9MBe8F/81ypCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T12:15:01.349306Z"},"content_sha256":"db9dc147b69f37e33f5e333a3752ccd94669a3e3f2d0c669182617eda05b1dc9","schema_version":"1.0","event_id":"sha256:db9dc147b69f37e33f5e333a3752ccd94669a3e3f2d0c669182617eda05b1dc9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/bundle.json","state_url":"https://pith.science/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/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":"2026-06-20T12:15:01Z","links":{"resolver":"https://pith.science/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU","bundle":"https://pith.science/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/bundle.json","state":"https://pith.science/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RZQQ4WHKCNOVA53SYRYS4MWQYU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RZQQ4WHKCNOVA53SYRYS4MWQYU","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":"8cdb28376bad815a947963b1b79e5871b9bc0e557cb9c133d8d0d836bd141f36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-15T17:59:43Z","title_canon_sha256":"075281f772b5182558a7f1daa105fefdcdc7e28654819e539d2f06b90de28b96"},"schema_version":"1.0","source":{"id":"1902.05949","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.05949","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"arxiv_version","alias_value":"1902.05949v1","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.05949","created_at":"2026-05-17T23:53:49Z"},{"alias_kind":"pith_short_12","alias_value":"RZQQ4WHKCNOV","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RZQQ4WHKCNOVA53S","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RZQQ4WHK","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:db9dc147b69f37e33f5e333a3752ccd94669a3e3f2d0c669182617eda05b1dc9","target":"graph","created_at":"2026-05-17T23:53:49Z","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":"Two mathematical models of three bodies of variable masses are used to obtain a qualitative description of two interacting galaxies with mass exchange and mass loss. The reference system is centred on the largest body (the most massive galaxy), and the other two bodies are allowed to move around this one under the laws of gravity. The third body, which simulated the mass lost by the second galaxy in the form of a tail, increases its mass due to the mass lost by the second body and follows its trajectory. We are interested in knowing the time evolution of the separation of the two bulges of the","authors_text":"Elkin L. L\\'opez, Gustavo V. L\\'opez, Simon N. Kemp","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-15T17:59:43Z","title":"Analytical model for the dynamical motion of the bulges of two interacting galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05949","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:fb4a493f0f4cc16bbdc7a50ce01362e557b1494797ba223980ba95552c8771d4","target":"record","created_at":"2026-05-17T23:53:49Z","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":"8cdb28376bad815a947963b1b79e5871b9bc0e557cb9c133d8d0d836bd141f36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-15T17:59:43Z","title_canon_sha256":"075281f772b5182558a7f1daa105fefdcdc7e28654819e539d2f06b90de28b96"},"schema_version":"1.0","source":{"id":"1902.05949","kind":"arxiv","version":1}},"canonical_sha256":"8e610e58ea135d507772c4712e32d0c5290c1223589a1829a3f2cb269d228465","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e610e58ea135d507772c4712e32d0c5290c1223589a1829a3f2cb269d228465","first_computed_at":"2026-05-17T23:53:49.137455Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:49.137455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gq4zRQDA2c/0llEcMN8rn5IVtC6QY16IAapL72KQ7kFSEUckHhtSFiPF2T53CpR2Zlzg9GtH4KnK+wFpMqzJDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:49.138058Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.05949","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb4a493f0f4cc16bbdc7a50ce01362e557b1494797ba223980ba95552c8771d4","sha256:db9dc147b69f37e33f5e333a3752ccd94669a3e3f2d0c669182617eda05b1dc9"],"state_sha256":"e998465304e18e79494a2d9dd2c37f5207ad1c65693bab02132f52a3a652e293"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yD1ki0POfjiHUJlquyLRBhkdWI42lpdNFJrbTKNRCKeAgH8EL+6ceIQBRfQhxl+UakNSdJHzkWX+2KR8pH36CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T12:15:01.351193Z","bundle_sha256":"930063cac968b492c2088ec20402223ea9320393fba7ae46a3a774d8ab0613b9"}}