{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GNTHYPOE2VI7Z4DJUTHAB5C6W2","short_pith_number":"pith:GNTHYPOE","canonical_record":{"source":{"id":"1811.07022","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T20:26:00Z","cross_cats_sorted":[],"title_canon_sha256":"f5f2adc5486b3cc75130fd1c135b449ceddf2f4dd714662383342dbf1471b41d","abstract_canon_sha256":"be86fbd6700d9aaae7084a1eba570d44bb7498d204812ef572e55eee29e31952"},"schema_version":"1.0"},"canonical_sha256":"33667c3dc4d551fcf069a4ce00f45eb69eb00ac7df91f2c95c35d25cd0e1d7b7","source":{"kind":"arxiv","id":"1811.07022","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.07022","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"arxiv_version","alias_value":"1811.07022v2","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.07022","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"pith_short_12","alias_value":"GNTHYPOE2VI7","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GNTHYPOE2VI7Z4DJ","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GNTHYPOE","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GNTHYPOE2VI7Z4DJUTHAB5C6W2","target":"record","payload":{"canonical_record":{"source":{"id":"1811.07022","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T20:26:00Z","cross_cats_sorted":[],"title_canon_sha256":"f5f2adc5486b3cc75130fd1c135b449ceddf2f4dd714662383342dbf1471b41d","abstract_canon_sha256":"be86fbd6700d9aaae7084a1eba570d44bb7498d204812ef572e55eee29e31952"},"schema_version":"1.0"},"canonical_sha256":"33667c3dc4d551fcf069a4ce00f45eb69eb00ac7df91f2c95c35d25cd0e1d7b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:02.974599Z","signature_b64":"kgR4Xz/8tYzyTxkR8Ew0kvZFWIJuoL9rpjTbA3Vlmjskri1ADKbEYTA6Ps3H755HUr78fji23tS32w/ghoRpCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33667c3dc4d551fcf069a4ce00f45eb69eb00ac7df91f2c95c35d25cd0e1d7b7","last_reissued_at":"2026-05-17T23:49:02.973923Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:02.973923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.07022","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":"2026-05-17T23:49:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mFzPV9tYdDZXyaDBCQRxQjcP+IhSwyeq7FaC4vU52FBw5nDsKmX6Xl7HPMuLkLpYFUfTFm5G//YkQPI6wsKHBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:18:52.815015Z"},"content_sha256":"6019822c6ffdf2a4660791321952937227287edf14141300a178960065f2836b","schema_version":"1.0","event_id":"sha256:6019822c6ffdf2a4660791321952937227287edf14141300a178960065f2836b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GNTHYPOE2VI7Z4DJUTHAB5C6W2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for the GD-1 Stream Progenitor in Gaia DR2 with Direct N-body Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jeremy J. Webb, Jo Bovy","submitted_at":"2018-11-16T20:26:00Z","abstract_excerpt":"We perform a large suite of direct N-body simulations aimed at revealing the location of the progenitor, or its remnant, of the GD-1 stream. Data from \\gaia\\ DR2 reveals the GD-1 stream extends over $\\approx 100^\\circ$, allowing us to determine the stream's leading and trailing ends. Our models suggest the length of the stream is consistent with a dynamical age of between 2-3 Gyr and the exact length, width and location of the GD-1 stream correspond to the stream's progenitor being located between $-30^\\circ < \\phi_{1,\\mathrm{pro}} < -45^{\\circ}$ in the standard GD-1 coordinate system. The mod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07022","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":"2026-05-17T23:49:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H2F6qdaKL0l+RqZHdgodilksZl8nTwfuR39plirWmRBYTx3BIWTEMh0/M0sVrvdw25jp+0JUkpdI6ZIVZphbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:18:52.815378Z"},"content_sha256":"00d331f730026bb9833bf20b36cc7614eacb98d264e2cf0b6f0c10a0caa29b01","schema_version":"1.0","event_id":"sha256:00d331f730026bb9833bf20b36cc7614eacb98d264e2cf0b6f0c10a0caa29b01"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/bundle.json","state_url":"https://pith.science/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/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":"2026-06-03T20:18:52Z","links":{"resolver":"https://pith.science/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2","bundle":"https://pith.science/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/bundle.json","state":"https://pith.science/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GNTHYPOE2VI7Z4DJUTHAB5C6W2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GNTHYPOE2VI7Z4DJUTHAB5C6W2","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":"be86fbd6700d9aaae7084a1eba570d44bb7498d204812ef572e55eee29e31952","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T20:26:00Z","title_canon_sha256":"f5f2adc5486b3cc75130fd1c135b449ceddf2f4dd714662383342dbf1471b41d"},"schema_version":"1.0","source":{"id":"1811.07022","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.07022","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"arxiv_version","alias_value":"1811.07022v2","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.07022","created_at":"2026-05-17T23:49:02Z"},{"alias_kind":"pith_short_12","alias_value":"GNTHYPOE2VI7","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GNTHYPOE2VI7Z4DJ","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GNTHYPOE","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:00d331f730026bb9833bf20b36cc7614eacb98d264e2cf0b6f0c10a0caa29b01","target":"graph","created_at":"2026-05-17T23:49:02Z","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 perform a large suite of direct N-body simulations aimed at revealing the location of the progenitor, or its remnant, of the GD-1 stream. Data from \\gaia\\ DR2 reveals the GD-1 stream extends over $\\approx 100^\\circ$, allowing us to determine the stream's leading and trailing ends. Our models suggest the length of the stream is consistent with a dynamical age of between 2-3 Gyr and the exact length, width and location of the GD-1 stream correspond to the stream's progenitor being located between $-30^\\circ < \\phi_{1,\\mathrm{pro}} < -45^{\\circ}$ in the standard GD-1 coordinate system. The mod","authors_text":"Jeremy J. Webb, Jo Bovy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T20:26:00Z","title":"Searching for the GD-1 Stream Progenitor in Gaia DR2 with Direct N-body Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07022","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":"sha256:6019822c6ffdf2a4660791321952937227287edf14141300a178960065f2836b","target":"record","created_at":"2026-05-17T23:49:02Z","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":"be86fbd6700d9aaae7084a1eba570d44bb7498d204812ef572e55eee29e31952","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-16T20:26:00Z","title_canon_sha256":"f5f2adc5486b3cc75130fd1c135b449ceddf2f4dd714662383342dbf1471b41d"},"schema_version":"1.0","source":{"id":"1811.07022","kind":"arxiv","version":2}},"canonical_sha256":"33667c3dc4d551fcf069a4ce00f45eb69eb00ac7df91f2c95c35d25cd0e1d7b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33667c3dc4d551fcf069a4ce00f45eb69eb00ac7df91f2c95c35d25cd0e1d7b7","first_computed_at":"2026-05-17T23:49:02.973923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:02.973923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kgR4Xz/8tYzyTxkR8Ew0kvZFWIJuoL9rpjTbA3Vlmjskri1ADKbEYTA6Ps3H755HUr78fji23tS32w/ghoRpCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:02.974599Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.07022","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6019822c6ffdf2a4660791321952937227287edf14141300a178960065f2836b","sha256:00d331f730026bb9833bf20b36cc7614eacb98d264e2cf0b6f0c10a0caa29b01"],"state_sha256":"23c45157c90fcdde9a26c4e5ce3a8bc5b046c3cffffaefc1327e16c2de9d56ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jwA5NCu55jBKF8sGBXcx1x+pfqI60fYVGilRG+3vW8pFp2KAGmp7BTyQCzHkEbm8XIMHNjzfClKgTZ9blm0sAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T20:18:52.817290Z","bundle_sha256":"b82889b365349afa5840ffc90e0fabc846a4e90d842aa38899f5df9123ea161d"}}