{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:REURGEQXWXABC2X762JJDDGMRF","short_pith_number":"pith:REURGEQX","canonical_record":{"source":{"id":"1209.2142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-10T20:18:57Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"19f4e8896f49de60bf760c980635776e8da1ebddda13638dac5f66255bf4089e","abstract_canon_sha256":"f5549a59055971bcb0e02f0b30c6f83cac899c822bdd59edc257486a52a15112"},"schema_version":"1.0"},"canonical_sha256":"8929131217b5c0116afff692918ccc895d17eed96e7a452e148ec43d5bc3ff4d","source":{"kind":"arxiv","id":"1209.2142","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.2142","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"arxiv_version","alias_value":"1209.2142v1","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.2142","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"pith_short_12","alias_value":"REURGEQXWXAB","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"REURGEQXWXABC2X7","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"REURGEQX","created_at":"2026-05-18T12:27:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:REURGEQXWXABC2X762JJDDGMRF","target":"record","payload":{"canonical_record":{"source":{"id":"1209.2142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-10T20:18:57Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"19f4e8896f49de60bf760c980635776e8da1ebddda13638dac5f66255bf4089e","abstract_canon_sha256":"f5549a59055971bcb0e02f0b30c6f83cac899c822bdd59edc257486a52a15112"},"schema_version":"1.0"},"canonical_sha256":"8929131217b5c0116afff692918ccc895d17eed96e7a452e148ec43d5bc3ff4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:37.359339Z","signature_b64":"Pa0G44FlWha/Q/wM//66mkW2jViGd6ciJSqjR3woCw6f4ZRobxghxKMG2Ym62n+yy9+LdfUNFVoXZPe7qgBKDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8929131217b5c0116afff692918ccc895d17eed96e7a452e148ec43d5bc3ff4d","last_reissued_at":"2026-05-18T01:54:37.358532Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:37.358532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.2142","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":"2026-05-18T01:54:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0/k3scQpEK4WzD9U7joSIyXzKGZfBr6fWPR3k6gK13MSTPwCciBjHQq1tvfoXIO6HEcTgyN9DoRmlfU6OBjBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:11:58.317516Z"},"content_sha256":"924df9f0d21df62172393dab88d36f2920b39d6dad97b304448a8a4e7b0338a9","schema_version":"1.0","event_id":"sha256:924df9f0d21df62172393dab88d36f2920b39d6dad97b304448a8a4e7b0338a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:REURGEQXWXABC2X762JJDDGMRF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterizing the formation history of Milky Way-like stellar haloes with model emulators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Brian W. O'Shea, Christopher E. Coleman-Smith, Facundo A. G\\'omez, Jason Tumlinson, Robert. L. Wolpert","submitted_at":"2012-09-10T20:18:57Z","abstract_excerpt":"We use the semi-analytic model ChemTreeN, coupled to cosmological N-body simulations, to explore how different galaxy formation histories can affect observational properties of Milky Way-like galaxies' stellar haloes and their satellite populations. Gaussian processes are used to generate model emulators that allow one to statistically estimate a desired set of model outputs at any location of a p-dimensional input parameter space. This enables one to explore the full input parameter space orders of magnitude faster than could be done otherwise. Using mock observational data sets generated by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.2142","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":"2026-05-18T01:54:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d5kwFVtvvFujpvNg8OxkUvC6X/Ja2JVgAOXyBCSwMHaYRCHad3RQBqvgdnN7z05j4NpbsQnOB6ZRL5BRDTNIBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:11:58.318114Z"},"content_sha256":"7428bd69e4e09cca78e4803f50b760968fa5f866326b798d390262b767b48746","schema_version":"1.0","event_id":"sha256:7428bd69e4e09cca78e4803f50b760968fa5f866326b798d390262b767b48746"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/REURGEQXWXABC2X762JJDDGMRF/bundle.json","state_url":"https://pith.science/pith/REURGEQXWXABC2X762JJDDGMRF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/REURGEQXWXABC2X762JJDDGMRF/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":"2026-06-02T13:11:58Z","links":{"resolver":"https://pith.science/pith/REURGEQXWXABC2X762JJDDGMRF","bundle":"https://pith.science/pith/REURGEQXWXABC2X762JJDDGMRF/bundle.json","state":"https://pith.science/pith/REURGEQXWXABC2X762JJDDGMRF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/REURGEQXWXABC2X762JJDDGMRF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:REURGEQXWXABC2X762JJDDGMRF","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":"f5549a59055971bcb0e02f0b30c6f83cac899c822bdd59edc257486a52a15112","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-10T20:18:57Z","title_canon_sha256":"19f4e8896f49de60bf760c980635776e8da1ebddda13638dac5f66255bf4089e"},"schema_version":"1.0","source":{"id":"1209.2142","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.2142","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"arxiv_version","alias_value":"1209.2142v1","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.2142","created_at":"2026-05-18T01:54:37Z"},{"alias_kind":"pith_short_12","alias_value":"REURGEQXWXAB","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"REURGEQXWXABC2X7","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"REURGEQX","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:7428bd69e4e09cca78e4803f50b760968fa5f866326b798d390262b767b48746","target":"graph","created_at":"2026-05-18T01:54:37Z","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 use the semi-analytic model ChemTreeN, coupled to cosmological N-body simulations, to explore how different galaxy formation histories can affect observational properties of Milky Way-like galaxies' stellar haloes and their satellite populations. Gaussian processes are used to generate model emulators that allow one to statistically estimate a desired set of model outputs at any location of a p-dimensional input parameter space. This enables one to explore the full input parameter space orders of magnitude faster than could be done otherwise. Using mock observational data sets generated by ","authors_text":"Brian W. O'Shea, Christopher E. Coleman-Smith, Facundo A. G\\'omez, Jason Tumlinson, Robert. L. Wolpert","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-10T20:18:57Z","title":"Characterizing the formation history of Milky Way-like stellar haloes with model emulators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.2142","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":"sha256:924df9f0d21df62172393dab88d36f2920b39d6dad97b304448a8a4e7b0338a9","target":"record","created_at":"2026-05-18T01:54:37Z","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":"f5549a59055971bcb0e02f0b30c6f83cac899c822bdd59edc257486a52a15112","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-09-10T20:18:57Z","title_canon_sha256":"19f4e8896f49de60bf760c980635776e8da1ebddda13638dac5f66255bf4089e"},"schema_version":"1.0","source":{"id":"1209.2142","kind":"arxiv","version":1}},"canonical_sha256":"8929131217b5c0116afff692918ccc895d17eed96e7a452e148ec43d5bc3ff4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8929131217b5c0116afff692918ccc895d17eed96e7a452e148ec43d5bc3ff4d","first_computed_at":"2026-05-18T01:54:37.358532Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:37.358532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Pa0G44FlWha/Q/wM//66mkW2jViGd6ciJSqjR3woCw6f4ZRobxghxKMG2Ym62n+yy9+LdfUNFVoXZPe7qgBKDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:37.359339Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.2142","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:924df9f0d21df62172393dab88d36f2920b39d6dad97b304448a8a4e7b0338a9","sha256:7428bd69e4e09cca78e4803f50b760968fa5f866326b798d390262b767b48746"],"state_sha256":"2789691e0456ace2abfb2fd399f23c7e3f25ea6dc92fbdc31db866685623fc4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AWciyx8xtbknbSp1oG3RkVGxmP4hXlz95glLss1dQnclysly3PgI7Xt3ZeNMPExIb5sflw3oWeVDAnxb6LiHDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:11:58.320550Z","bundle_sha256":"a23a3399ffe2b310b20357a77716c0bdc30abfaaebca92fea238ee6cc664f515"}}