{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SANKEO7MKYM5LQ6A2XPCANAV6N","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":"10adca6a6864a7bd339db81dca3ca6caf50205a080c2816aa75d0c9443f595ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-26T20:01:24Z","title_canon_sha256":"ea5364d23d488d907bc008ed743f8c25a8ac321bb0b68f803eec1866ff9abc2d"},"schema_version":"1.0","source":{"id":"1309.7058","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.7058","created_at":"2026-05-18T01:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1309.7058v1","created_at":"2026-05-18T01:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.7058","created_at":"2026-05-18T01:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"SANKEO7MKYM5","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SANKEO7MKYM5LQ6A","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SANKEO7M","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:a1820b984a51f1c2eea0f31155d5294adb083a307f9b3eeb939864ba4cde7ba0","target":"graph","created_at":"2026-05-18T01:47:25Z","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 estimate the potential contribution of M < 10^9 Msun dwarf galaxies to the reionization and early metal-enrichment of the Milky Way environment, or circum-Galactic Medium. Our approach is to use the observed properties of ancient stars (> 12 Gyr old) measured in nearby dwarf galaxies to characterize the star-formation at high-z. We use a merger-tree model for the build-up of the Milky Way, which self-consistently accounts for feedback processes, and which is calibrated to match the present-day properties of the Galaxy and its dwarf satellites. We show that the high-z analogues of nearby dwa","authors_text":"A. Ferrara (2), E. Tolstoy (1), S. Salvadori (1), S. Zaroubi (1) ((1) Kapteyn Astronomical Institute (2) Scuola Normale Superiore)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-26T20:01:24Z","title":"Metals and ionizing photons from dwarf galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.7058","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":"sha256:535ce77dd2b696fe18a3ea15fd9091c5408533b6836f2ec7f0a903fd09e25025","target":"record","created_at":"2026-05-18T01:47:25Z","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":"10adca6a6864a7bd339db81dca3ca6caf50205a080c2816aa75d0c9443f595ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-09-26T20:01:24Z","title_canon_sha256":"ea5364d23d488d907bc008ed743f8c25a8ac321bb0b68f803eec1866ff9abc2d"},"schema_version":"1.0","source":{"id":"1309.7058","kind":"arxiv","version":1}},"canonical_sha256":"901aa23bec5619d5c3c0d5de203415f3757fd0cd2ab3d6f2c86ba66ab44ea012","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"901aa23bec5619d5c3c0d5de203415f3757fd0cd2ab3d6f2c86ba66ab44ea012","first_computed_at":"2026-05-18T01:47:25.844896Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:25.844896Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XH9YM6sCVpyWtC4lgXB9sGAfYmXj81wl5Hcy9s8cn8j1/AxxImPbYdUuPyjqm7M4gBqFlhf2K87e0PEZx3gqAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:25.845580Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.7058","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:535ce77dd2b696fe18a3ea15fd9091c5408533b6836f2ec7f0a903fd09e25025","sha256:a1820b984a51f1c2eea0f31155d5294adb083a307f9b3eeb939864ba4cde7ba0"],"state_sha256":"e898af0b3847cb381382a654f58293c37e715b5b546ee2f0481dac7fe5c5a5bf"}