{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ZPSMPERI3EK3ZSK2ARMCDJM42A","short_pith_number":"pith:ZPSMPERI","canonical_record":{"source":{"id":"1501.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-01-12T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"43eabf918fb5c56630ec78dc72659dd4d5b1c923913114e52d5653a8d207e0a8","abstract_canon_sha256":"2ab88d148056937ebbe88645637a43a6d37d2e97222aaca0e361b4f14fe10e04"},"schema_version":"1.0"},"canonical_sha256":"cbe4c79228d915bcc95a045821a59cd00578c4537c868c6e7cc5beb13ef632c2","source":{"kind":"arxiv","id":"1501.02806","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02806","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02806v1","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02806","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZPSMPERI3EK3","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZPSMPERI3EK3ZSK2","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZPSMPERI","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ZPSMPERI3EK3ZSK2ARMCDJM42A","target":"record","payload":{"canonical_record":{"source":{"id":"1501.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-01-12T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"43eabf918fb5c56630ec78dc72659dd4d5b1c923913114e52d5653a8d207e0a8","abstract_canon_sha256":"2ab88d148056937ebbe88645637a43a6d37d2e97222aaca0e361b4f14fe10e04"},"schema_version":"1.0"},"canonical_sha256":"cbe4c79228d915bcc95a045821a59cd00578c4537c868c6e7cc5beb13ef632c2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:11.491309Z","signature_b64":"C1IHQxpVSMDotqNV7y1S6MmeP3nuxYZdV3OW3v1ShOkPafgScJh3U9FMIuvRj7t4WULKg2J2zR/l9AdWW8yHDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbe4c79228d915bcc95a045821a59cd00578c4537c868c6e7cc5beb13ef632c2","last_reissued_at":"2026-05-18T01:41:11.490649Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:11.490649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.02806","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":"2026-05-18T01:41:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BPnlLqoGZjnUAnE3VphJqmlfa817mMPFlpL2Njju2szuBM0RYpvNjq+ycK1SnDlrQJLPdcd1QMfcBS7K4JXLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T21:17:28.799622Z"},"content_sha256":"ef1bc08e2d09c88651b8eba5006e88ef69b27c5ac2f046a279910778117bb046","schema_version":"1.0","event_id":"sha256:ef1bc08e2d09c88651b8eba5006e88ef69b27c5ac2f046a279910778117bb046"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ZPSMPERI3EK3ZSK2ARMCDJM42A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Progenitors of the Milky Way Stellar Halo: Big Bricks Favoured over Little Bricks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. J. Deason (UCSC), D. R. Weisz (UW), V. Belokurov (Cambridge)","submitted_at":"2015-01-12T21:00:12Z","abstract_excerpt":"We present a census of blue horizontal branch (BHB) and blue straggler (BS) stars belonging to dwarf galaxies and globular clusters, and compare these counts to that of the Milky Way stellar halo. We find, in agreement with earlier studies, that the ratio of BS-to-BHB stars in these satellite populations is dependent on stellar mass. Dwarf galaxies show an increasing BS-to-BHB ratio with luminosity. In contrast, globular clusters display the reverse trend, with N_BS/N_BHB (< 1) decreasing with luminosity. The faintest (L < 10^5 L_Sun) dwarfs have similar numbers of BS and BHB stars (N_BS/N_BHB"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02806","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":"2026-05-18T01:41:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d128/76dRVWvtdmhoTRksFwshoID35VcbUn+0H/qwX2JkDaWM1nuSHaPMDTUSbg8A4A2H0JZ286Mtjf5/FqcCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T21:17:28.800331Z"},"content_sha256":"9e4fb55af1903d6f76f5532454c0bab43470233035b1e69ef715973355f926a7","schema_version":"1.0","event_id":"sha256:9e4fb55af1903d6f76f5532454c0bab43470233035b1e69ef715973355f926a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/bundle.json","state_url":"https://pith.science/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/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":"2026-06-08T21:17:28Z","links":{"resolver":"https://pith.science/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A","bundle":"https://pith.science/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/bundle.json","state":"https://pith.science/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZPSMPERI3EK3ZSK2ARMCDJM42A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ZPSMPERI3EK3ZSK2ARMCDJM42A","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":"2ab88d148056937ebbe88645637a43a6d37d2e97222aaca0e361b4f14fe10e04","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-01-12T21:00:12Z","title_canon_sha256":"43eabf918fb5c56630ec78dc72659dd4d5b1c923913114e52d5653a8d207e0a8"},"schema_version":"1.0","source":{"id":"1501.02806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02806","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02806v1","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02806","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZPSMPERI3EK3","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZPSMPERI3EK3ZSK2","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZPSMPERI","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:9e4fb55af1903d6f76f5532454c0bab43470233035b1e69ef715973355f926a7","target":"graph","created_at":"2026-05-18T01:41:11Z","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 present a census of blue horizontal branch (BHB) and blue straggler (BS) stars belonging to dwarf galaxies and globular clusters, and compare these counts to that of the Milky Way stellar halo. We find, in agreement with earlier studies, that the ratio of BS-to-BHB stars in these satellite populations is dependent on stellar mass. Dwarf galaxies show an increasing BS-to-BHB ratio with luminosity. In contrast, globular clusters display the reverse trend, with N_BS/N_BHB (< 1) decreasing with luminosity. The faintest (L < 10^5 L_Sun) dwarfs have similar numbers of BS and BHB stars (N_BS/N_BHB","authors_text":"A. J. Deason (UCSC), D. R. Weisz (UW), V. Belokurov (Cambridge)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-01-12T21:00:12Z","title":"The Progenitors of the Milky Way Stellar Halo: Big Bricks Favoured over Little Bricks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02806","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:ef1bc08e2d09c88651b8eba5006e88ef69b27c5ac2f046a279910778117bb046","target":"record","created_at":"2026-05-18T01:41:11Z","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":"2ab88d148056937ebbe88645637a43a6d37d2e97222aaca0e361b4f14fe10e04","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-01-12T21:00:12Z","title_canon_sha256":"43eabf918fb5c56630ec78dc72659dd4d5b1c923913114e52d5653a8d207e0a8"},"schema_version":"1.0","source":{"id":"1501.02806","kind":"arxiv","version":1}},"canonical_sha256":"cbe4c79228d915bcc95a045821a59cd00578c4537c868c6e7cc5beb13ef632c2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbe4c79228d915bcc95a045821a59cd00578c4537c868c6e7cc5beb13ef632c2","first_computed_at":"2026-05-18T01:41:11.490649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:11.490649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C1IHQxpVSMDotqNV7y1S6MmeP3nuxYZdV3OW3v1ShOkPafgScJh3U9FMIuvRj7t4WULKg2J2zR/l9AdWW8yHDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:11.491309Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.02806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ef1bc08e2d09c88651b8eba5006e88ef69b27c5ac2f046a279910778117bb046","sha256:9e4fb55af1903d6f76f5532454c0bab43470233035b1e69ef715973355f926a7"],"state_sha256":"dd13af319acc9e8e9db3cc2d79c747c3e954c3b54391da27de82dbea714ca85e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z4U5mNgz5tgsuKcrEQVdnruOPuGV+It1ewSLNyaCB8HDoBkAOPWsvSHSwiLnKlDjbOC/9zbt1Aq3mJ2bhBAIDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T21:17:28.804124Z","bundle_sha256":"90fbb112f5a4d5ce070a165bcb5a839a64696ed45e77304b098dcc02f452caba"}}