{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:BGNYPZ4JOIGA22SO2OCIOKXYWH","short_pith_number":"pith:BGNYPZ4J","canonical_record":{"source":{"id":"1606.02694","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-08T19:24:37Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"56bf93f2b6b8f2a7b7dbac40ca1e721a8a9710cd5300fa7c5adbcbd7631c5078","abstract_canon_sha256":"1aa9de565b1c3ed4ed9b66417b7289eb20e44f0237827f8e9a2979c6d73c01ca"},"schema_version":"1.0"},"canonical_sha256":"099b87e789720c0d6a4ed384872af8b1fa4999c0b99d6f3fc89047b2087bb48e","source":{"kind":"arxiv","id":"1606.02694","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02694","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02694v3","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02694","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"BGNYPZ4JOIGA","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BGNYPZ4JOIGA22SO","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BGNYPZ4J","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:BGNYPZ4JOIGA22SO2OCIOKXYWH","target":"record","payload":{"canonical_record":{"source":{"id":"1606.02694","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-08T19:24:37Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"56bf93f2b6b8f2a7b7dbac40ca1e721a8a9710cd5300fa7c5adbcbd7631c5078","abstract_canon_sha256":"1aa9de565b1c3ed4ed9b66417b7289eb20e44f0237827f8e9a2979c6d73c01ca"},"schema_version":"1.0"},"canonical_sha256":"099b87e789720c0d6a4ed384872af8b1fa4999c0b99d6f3fc89047b2087bb48e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:22.266552Z","signature_b64":"PdXfWubkgRUolH1U68PIOGrfJlJH1XnQAnUwhzKEUh43rnzLsw7QiKRLKbvEknOEf+LPUZdJXyVe+XkwXssjAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"099b87e789720c0d6a4ed384872af8b1fa4999c0b99d6f3fc89047b2087bb48e","last_reissued_at":"2026-05-18T00:27:22.266115Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:22.266115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.02694","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":"2026-05-18T00:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cXrH1F4xvwrXINYw7oYXVhOKjfQUFBCzkS4vTnMQ2vcLQqmD176RMaau6pSAsAeLdcSTqgxM+DaC8wCNbJS1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:00:23.777130Z"},"content_sha256":"a88c1954413543ff99e4d884db0473944a1146a9d53c4b1b29d112eba094d7be","schema_version":"1.0","event_id":"sha256:a88c1954413543ff99e4d884db0473944a1146a9d53c4b1b29d112eba094d7be"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:BGNYPZ4JOIGA22SO2OCIOKXYWH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimating the Mass of the Local Group using Machine Learning Applied to Numerical Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"Michael McLeod, Noam Libeskind, Ofer Lahav, Yehuda Hoffman","submitted_at":"2016-06-08T19:24:37Z","abstract_excerpt":"We revisit the estimation of the combined mass of the Milky Way and Andromeda (M31), which dominate the mass of the Local Group. We make use of an ensemble of 30,190 halo pairs from the Small MultiDark simulation, assuming a $\\Lambda$CDM (Cosmological Constant with Cold Dark Matter) cosmology, to investigate the relationship between the bound mass and parameters characterising the orbit of the binary and their local environment with the aid of machine learning methods (artificial neural networks, ANN). Results from the ANN are most successful when information about the velocity shear is provid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02694","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":"2026-05-18T00:27:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R/sWYoiAQSD73Ml5JNWkZk+hlWC992/+3AQDuJ15xe03YUqSEFfUIQXsTWEVG7XUBEZ35qKOCHgeO4gC03lPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:00:23.777790Z"},"content_sha256":"f0a2aaf82751137b555188b231f4b16c87b8fc08fb82f2a681ab67c132fcad09","schema_version":"1.0","event_id":"sha256:f0a2aaf82751137b555188b231f4b16c87b8fc08fb82f2a681ab67c132fcad09"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/bundle.json","state_url":"https://pith.science/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/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":"2026-05-26T10:00:23Z","links":{"resolver":"https://pith.science/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH","bundle":"https://pith.science/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/bundle.json","state":"https://pith.science/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BGNYPZ4JOIGA22SO2OCIOKXYWH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:BGNYPZ4JOIGA22SO2OCIOKXYWH","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":"1aa9de565b1c3ed4ed9b66417b7289eb20e44f0237827f8e9a2979c6d73c01ca","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-08T19:24:37Z","title_canon_sha256":"56bf93f2b6b8f2a7b7dbac40ca1e721a8a9710cd5300fa7c5adbcbd7631c5078"},"schema_version":"1.0","source":{"id":"1606.02694","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02694","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02694v3","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02694","created_at":"2026-05-18T00:27:22Z"},{"alias_kind":"pith_short_12","alias_value":"BGNYPZ4JOIGA","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BGNYPZ4JOIGA22SO","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BGNYPZ4J","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:f0a2aaf82751137b555188b231f4b16c87b8fc08fb82f2a681ab67c132fcad09","target":"graph","created_at":"2026-05-18T00:27:22Z","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 revisit the estimation of the combined mass of the Milky Way and Andromeda (M31), which dominate the mass of the Local Group. We make use of an ensemble of 30,190 halo pairs from the Small MultiDark simulation, assuming a $\\Lambda$CDM (Cosmological Constant with Cold Dark Matter) cosmology, to investigate the relationship between the bound mass and parameters characterising the orbit of the binary and their local environment with the aid of machine learning methods (artificial neural networks, ANN). Results from the ANN are most successful when information about the velocity shear is provid","authors_text":"Michael McLeod, Noam Libeskind, Ofer Lahav, Yehuda Hoffman","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-08T19:24:37Z","title":"Estimating the Mass of the Local Group using Machine Learning Applied to Numerical Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02694","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:a88c1954413543ff99e4d884db0473944a1146a9d53c4b1b29d112eba094d7be","target":"record","created_at":"2026-05-18T00:27:22Z","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":"1aa9de565b1c3ed4ed9b66417b7289eb20e44f0237827f8e9a2979c6d73c01ca","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-08T19:24:37Z","title_canon_sha256":"56bf93f2b6b8f2a7b7dbac40ca1e721a8a9710cd5300fa7c5adbcbd7631c5078"},"schema_version":"1.0","source":{"id":"1606.02694","kind":"arxiv","version":3}},"canonical_sha256":"099b87e789720c0d6a4ed384872af8b1fa4999c0b99d6f3fc89047b2087bb48e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"099b87e789720c0d6a4ed384872af8b1fa4999c0b99d6f3fc89047b2087bb48e","first_computed_at":"2026-05-18T00:27:22.266115Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:22.266115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PdXfWubkgRUolH1U68PIOGrfJlJH1XnQAnUwhzKEUh43rnzLsw7QiKRLKbvEknOEf+LPUZdJXyVe+XkwXssjAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:22.266552Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.02694","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a88c1954413543ff99e4d884db0473944a1146a9d53c4b1b29d112eba094d7be","sha256:f0a2aaf82751137b555188b231f4b16c87b8fc08fb82f2a681ab67c132fcad09"],"state_sha256":"f970cfb114a204f8559b3f15f0820ee47e3e48d69f759f874b9ed70a5e6b2d4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oD47mUQdyz/M6+/eplAFecw9fws71K3zuN3LgscTR1l0Of0wpjJ8KPuenI+xqWZxS4M3Wo8H5pg60uGmBWvUBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:00:23.781765Z","bundle_sha256":"d21d8ea0907c3f3fdb235f1d11fed2af6855335452dfb0779117130b58aa0f38"}}