{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:QCPTSVB6KZFGQS4MFJ3THMJNID","short_pith_number":"pith:QCPTSVB6","canonical_record":{"source":{"id":"1711.07485","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-20T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"3a92aa72e5b229c286e9155bc6e698537f9789e41ef19592a6d71ea29192546e","abstract_canon_sha256":"2b27f30a22c5c12555316f00c6b83465e002aaca25e27c04e86ccc18784b8f27"},"schema_version":"1.0"},"canonical_sha256":"809f39543e564a684b8c2a7733b12d40e6fa4a0012d2137dff97cb3fdb834d7d","source":{"kind":"arxiv","id":"1711.07485","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07485","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07485v1","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07485","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"QCPTSVB6KZFG","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"QCPTSVB6KZFGQS4M","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"QCPTSVB6","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:QCPTSVB6KZFGQS4MFJ3THMJNID","target":"record","payload":{"canonical_record":{"source":{"id":"1711.07485","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-20T19:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"3a92aa72e5b229c286e9155bc6e698537f9789e41ef19592a6d71ea29192546e","abstract_canon_sha256":"2b27f30a22c5c12555316f00c6b83465e002aaca25e27c04e86ccc18784b8f27"},"schema_version":"1.0"},"canonical_sha256":"809f39543e564a684b8c2a7733b12d40e6fa4a0012d2137dff97cb3fdb834d7d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:38.284827Z","signature_b64":"wC445mVSUTHkyPg6SM1Giwjg9FxQK0vCWh5CT1Dgg5c6vdRGcf7KuDO2s4DCeoEZVUWqrhBDMqFrPbbBLbvmBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"809f39543e564a684b8c2a7733b12d40e6fa4a0012d2137dff97cb3fdb834d7d","last_reissued_at":"2026-05-18T00:20:38.284221Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:38.284221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.07485","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":"2026-05-18T00:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"flD7v7fCf3SFtrFG6yPe0NPZ1ME6bOh4aNaYp3GqRL1dROSbsdyxpL9k+inuKl1oFWARot0YWIS2Uth0WwmJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:40:05.299017Z"},"content_sha256":"3536abb15c79cd7a1f9ca16307a240a14be7d3b0d54d49f9466b4dd6c4d9417f","schema_version":"1.0","event_id":"sha256:3536abb15c79cd7a1f9ca16307a240a14be7d3b0d54d49f9466b4dd6c4d9417f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:QCPTSVB6KZFGQS4MFJ3THMJNID","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unmixing the Galactic Halo with RR Lyrae tagging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.J. Deason, A.J. Drake, D. Erkal, M. Catelan, N.W. Evans, S.E. Koposov, V. Belokurov","submitted_at":"2017-11-20T19:00:00Z","abstract_excerpt":"We show that tagging RR Lyrae stars according to their location in the period-amplitude diagram can be used to shed light on the genesis of the Galactic stellar halo. The mixture of RR Lyrae of ab type, separated into classes along the lines suggested by Oosterhoff, displays a strong and coherent evolution with Galactocentric radius. The change in the RR Lyrae composition appears to coincide with the break in the halo's radial density profile at ~25 kpc. Using simple models of the stellar halo, we establish that at least three different types of accretion events are necessary to explain the ob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07485","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":"2026-05-18T00:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0fAHoVbANhw+PKhOoUAUTahJKfdGnVOSs1FT93UHKrn1u91J+yVZt2OS3IHRen12NE3iifg3j3j8z6F9FfCKAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T22:40:05.299375Z"},"content_sha256":"3885bf98d88591423e6eedb73c29c8ea03e1731be84279e1a03529da6533defc","schema_version":"1.0","event_id":"sha256:3885bf98d88591423e6eedb73c29c8ea03e1731be84279e1a03529da6533defc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/bundle.json","state_url":"https://pith.science/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/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":"2026-06-02T22:40:05Z","links":{"resolver":"https://pith.science/pith/QCPTSVB6KZFGQS4MFJ3THMJNID","bundle":"https://pith.science/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/bundle.json","state":"https://pith.science/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QCPTSVB6KZFGQS4MFJ3THMJNID/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QCPTSVB6KZFGQS4MFJ3THMJNID","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":"2b27f30a22c5c12555316f00c6b83465e002aaca25e27c04e86ccc18784b8f27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-20T19:00:00Z","title_canon_sha256":"3a92aa72e5b229c286e9155bc6e698537f9789e41ef19592a6d71ea29192546e"},"schema_version":"1.0","source":{"id":"1711.07485","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.07485","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1711.07485v1","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.07485","created_at":"2026-05-18T00:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"QCPTSVB6KZFG","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"QCPTSVB6KZFGQS4M","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"QCPTSVB6","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:3885bf98d88591423e6eedb73c29c8ea03e1731be84279e1a03529da6533defc","target":"graph","created_at":"2026-05-18T00:20:38Z","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 show that tagging RR Lyrae stars according to their location in the period-amplitude diagram can be used to shed light on the genesis of the Galactic stellar halo. The mixture of RR Lyrae of ab type, separated into classes along the lines suggested by Oosterhoff, displays a strong and coherent evolution with Galactocentric radius. The change in the RR Lyrae composition appears to coincide with the break in the halo's radial density profile at ~25 kpc. Using simple models of the stellar halo, we establish that at least three different types of accretion events are necessary to explain the ob","authors_text":"A.J. Deason, A.J. Drake, D. Erkal, M. Catelan, N.W. Evans, S.E. Koposov, V. Belokurov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-20T19:00:00Z","title":"Unmixing the Galactic Halo with RR Lyrae tagging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.07485","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":"sha256:3536abb15c79cd7a1f9ca16307a240a14be7d3b0d54d49f9466b4dd6c4d9417f","target":"record","created_at":"2026-05-18T00:20:38Z","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":"2b27f30a22c5c12555316f00c6b83465e002aaca25e27c04e86ccc18784b8f27","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-20T19:00:00Z","title_canon_sha256":"3a92aa72e5b229c286e9155bc6e698537f9789e41ef19592a6d71ea29192546e"},"schema_version":"1.0","source":{"id":"1711.07485","kind":"arxiv","version":1}},"canonical_sha256":"809f39543e564a684b8c2a7733b12d40e6fa4a0012d2137dff97cb3fdb834d7d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"809f39543e564a684b8c2a7733b12d40e6fa4a0012d2137dff97cb3fdb834d7d","first_computed_at":"2026-05-18T00:20:38.284221Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:38.284221Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wC445mVSUTHkyPg6SM1Giwjg9FxQK0vCWh5CT1Dgg5c6vdRGcf7KuDO2s4DCeoEZVUWqrhBDMqFrPbbBLbvmBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:38.284827Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.07485","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3536abb15c79cd7a1f9ca16307a240a14be7d3b0d54d49f9466b4dd6c4d9417f","sha256:3885bf98d88591423e6eedb73c29c8ea03e1731be84279e1a03529da6533defc"],"state_sha256":"533988aafb7fe931cace2106c922b153809c106babf9c7481ded16ad4b3d50fa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n5bzf/izrmCMK830mmsqwmpdVDjONJg5WN9QxdGCyfxdLNG6rCxBxg7FewyqRnoM7TyE4wC6b8c6iwfDWrG/Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T22:40:05.301255Z","bundle_sha256":"30d06668668916d1b87efb5bbbde0385da10655149389c6e5eb3ba532c798fe7"}}