{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:H74CMQVHAMLYTZ7Z32NODEN7AN","short_pith_number":"pith:H74CMQVH","canonical_record":{"source":{"id":"1812.01486","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-04T15:30:18Z","cross_cats_sorted":[],"title_canon_sha256":"e62bdfc9c0e72aacfa75bbb82b8ef6876ac9891c56f5698dbaa7a76039c8d7c1","abstract_canon_sha256":"512bed6a8259921fde526a1235f859bc91be73d1ca0f933425ff4ce26c1aab9b"},"schema_version":"1.0"},"canonical_sha256":"3ff82642a7031789e7f9de9ae191bf0374496a6ae882f050804e3f7fdc7fb2ea","source":{"kind":"arxiv","id":"1812.01486","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01486","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01486v2","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01486","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"pith_short_12","alias_value":"H74CMQVHAMLY","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"H74CMQVHAMLYTZ7Z","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"H74CMQVH","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:H74CMQVHAMLYTZ7Z32NODEN7AN","target":"record","payload":{"canonical_record":{"source":{"id":"1812.01486","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-04T15:30:18Z","cross_cats_sorted":[],"title_canon_sha256":"e62bdfc9c0e72aacfa75bbb82b8ef6876ac9891c56f5698dbaa7a76039c8d7c1","abstract_canon_sha256":"512bed6a8259921fde526a1235f859bc91be73d1ca0f933425ff4ce26c1aab9b"},"schema_version":"1.0"},"canonical_sha256":"3ff82642a7031789e7f9de9ae191bf0374496a6ae882f050804e3f7fdc7fb2ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:12.723535Z","signature_b64":"ZoYqRvkZCzkoiyqvvM5Oe1YRTUVuBRtb4bxqjOOAtxIaXNU53UFBEgHdjp9sdUcXc2y7AXVpjuACmjq30jViDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ff82642a7031789e7f9de9ae191bf0374496a6ae882f050804e3f7fdc7fb2ea","last_reissued_at":"2026-05-17T23:44:12.722897Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:12.722897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.01486","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":"2026-05-17T23:44:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OR3vpfE0ODF+YM7P1mb8Gt2CWdhQFMoBR3d5Zs5u/S0nK34eeLyffTG6gdNxbwIGjWgxJ1TQoYt8NXXVdmU0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:07:34.199870Z"},"content_sha256":"d017c49f9ad21cc306d1437c1ad2589d36732b4320bdc5af5b1009c6b53ae896","schema_version":"1.0","event_id":"sha256:d017c49f9ad21cc306d1437c1ad2589d36732b4320bdc5af5b1009c6b53ae896"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:H74CMQVHAMLYTZ7Z32NODEN7AN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"VLT/FLAMES high-resolution chemical abundances in Sculptor: a textbook dwarf spheroidal galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Amina Helmi, Andreas Kaufer, \\'Asa Sk\\'ulad\\'ottir, Bruno Letarte, Eline Tolstoy, Else Starkenburg, Francesca Primas, Giuseppina Battaglia, Kim A. Venn, Matthew D. Shetrone, Monique Spite, Pascale Jablonka, Patrick Fran\\c{c}ois, Thomas J.L. de Boer, Vanessa Hill","submitted_at":"2018-12-04T15:30:18Z","abstract_excerpt":"We present detailed chemical abundances for 99 red-giant branch stars in the centre of the Sculptor dwarf spheroidal galaxy, obtained from high-resolution VLT/FLAMES spectroscopy. This includes abundances of Li (detected in 1 out of 99 stars), Na, $\\alpha$-elements (O, Mg, Si, Ca Ti), iron-peak elements (Sc, Cr, Fe, Co, Ni, Zn), r- and s-process elements (Ba, La, Nd, Eu). The sample, covering -2.3< [Fe/H]<-0.9, populates the whole metallicity distribution of the galaxy with the exception of the very low metallicity tail. There is a marked decrease in [$\\alpha$/Fe] over our sample, from the Gal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01486","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":"2026-05-17T23:44:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xIcP8JHmqUFVy2NFVAYKf/ojccy2F7sCCOvmzaDjB0hfR6GZnf7/EBm6q8bKkziKsfJLgFTUn310YqKHHvLwBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:07:34.200525Z"},"content_sha256":"eabafaf7f0ee5aec0be58242aa6c7f26ccce4914e63eaab63acb31544e5227df","schema_version":"1.0","event_id":"sha256:eabafaf7f0ee5aec0be58242aa6c7f26ccce4914e63eaab63acb31544e5227df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/bundle.json","state_url":"https://pith.science/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/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":"2026-06-02T18:07:34Z","links":{"resolver":"https://pith.science/pith/H74CMQVHAMLYTZ7Z32NODEN7AN","bundle":"https://pith.science/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/bundle.json","state":"https://pith.science/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H74CMQVHAMLYTZ7Z32NODEN7AN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:H74CMQVHAMLYTZ7Z32NODEN7AN","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":"512bed6a8259921fde526a1235f859bc91be73d1ca0f933425ff4ce26c1aab9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-04T15:30:18Z","title_canon_sha256":"e62bdfc9c0e72aacfa75bbb82b8ef6876ac9891c56f5698dbaa7a76039c8d7c1"},"schema_version":"1.0","source":{"id":"1812.01486","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01486","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01486v2","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01486","created_at":"2026-05-17T23:44:12Z"},{"alias_kind":"pith_short_12","alias_value":"H74CMQVHAMLY","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"H74CMQVHAMLYTZ7Z","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"H74CMQVH","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:eabafaf7f0ee5aec0be58242aa6c7f26ccce4914e63eaab63acb31544e5227df","target":"graph","created_at":"2026-05-17T23:44:12Z","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 detailed chemical abundances for 99 red-giant branch stars in the centre of the Sculptor dwarf spheroidal galaxy, obtained from high-resolution VLT/FLAMES spectroscopy. This includes abundances of Li (detected in 1 out of 99 stars), Na, $\\alpha$-elements (O, Mg, Si, Ca Ti), iron-peak elements (Sc, Cr, Fe, Co, Ni, Zn), r- and s-process elements (Ba, La, Nd, Eu). The sample, covering -2.3< [Fe/H]<-0.9, populates the whole metallicity distribution of the galaxy with the exception of the very low metallicity tail. There is a marked decrease in [$\\alpha$/Fe] over our sample, from the Gal","authors_text":"Amina Helmi, Andreas Kaufer, \\'Asa Sk\\'ulad\\'ottir, Bruno Letarte, Eline Tolstoy, Else Starkenburg, Francesca Primas, Giuseppina Battaglia, Kim A. Venn, Matthew D. Shetrone, Monique Spite, Pascale Jablonka, Patrick Fran\\c{c}ois, Thomas J.L. de Boer, Vanessa Hill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-04T15:30:18Z","title":"VLT/FLAMES high-resolution chemical abundances in Sculptor: a textbook dwarf spheroidal galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01486","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:d017c49f9ad21cc306d1437c1ad2589d36732b4320bdc5af5b1009c6b53ae896","target":"record","created_at":"2026-05-17T23:44:12Z","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":"512bed6a8259921fde526a1235f859bc91be73d1ca0f933425ff4ce26c1aab9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-04T15:30:18Z","title_canon_sha256":"e62bdfc9c0e72aacfa75bbb82b8ef6876ac9891c56f5698dbaa7a76039c8d7c1"},"schema_version":"1.0","source":{"id":"1812.01486","kind":"arxiv","version":2}},"canonical_sha256":"3ff82642a7031789e7f9de9ae191bf0374496a6ae882f050804e3f7fdc7fb2ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ff82642a7031789e7f9de9ae191bf0374496a6ae882f050804e3f7fdc7fb2ea","first_computed_at":"2026-05-17T23:44:12.722897Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:12.722897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZoYqRvkZCzkoiyqvvM5Oe1YRTUVuBRtb4bxqjOOAtxIaXNU53UFBEgHdjp9sdUcXc2y7AXVpjuACmjq30jViDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:12.723535Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.01486","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d017c49f9ad21cc306d1437c1ad2589d36732b4320bdc5af5b1009c6b53ae896","sha256:eabafaf7f0ee5aec0be58242aa6c7f26ccce4914e63eaab63acb31544e5227df"],"state_sha256":"c07bd933a1beabf15b0bc8c0b4e6307ebed15b82a98de9731c316820ecfde8b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"avEZ5bwAsixHqhlsAGyHyoWFATk1pYZshwDnf07cpaXWCnmJYuwyDZvtPXHA6ann8XwsIKkyeRusz9fZK0WvBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:07:34.203889Z","bundle_sha256":"fc3ce40f4dd7d2888e5d307f196e62ecc5d995b0bae4ce6ec4cec32010f33a24"}}