{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:PPF2EMJ6PDLRA2P5IXX64GSPCK","short_pith_number":"pith:PPF2EMJ6","schema_version":"1.0","canonical_sha256":"7bcba2313e78d71069fd45efee1a4f1293e9339c0c1fd630981d673d4bfb4f13","source":{"kind":"arxiv","id":"1810.01525","version":1},"attestation_state":"computed","paper":{"title":"Project AMIGA: Distance and Metallicity Gradients Along Andromeda's Giant Southern Stream from the Red Clump","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Jason S. Kalirai, John M. O'Meara, Karoline M. Gilbert, Kathleen A. Barger, Luciana Bianchi, Molly S. Peeples, Nicolas Lehner, Puragra Guhathakurta, Roger E. Cohen, Thomas M. Brown","submitted_at":"2018-10-02T21:25:29Z","abstract_excerpt":"The Giant Southern Stream (GSS) of M31, a keystone signature of a major accretion event, yields crucial constraints on M31 formation and evolution models. Currently, our understanding of the GSS, in terms of both its geometry and its chemistry, results from either wide-field imaging probing only a few magnitudes below the red giant branch tip, or deep imaging or spectroscopy of isolated regions. Here, we take an alternative approach, using Hubble Space Telescope (HST) imaging to characterize the horizontal branch red clump (RC) using unbinned maximum likelihood fits to luminosity functions (LF"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1810.01525","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-02T21:25:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"481b2a19813d48d488582b6d11018d401b19285a2aa837f428f694e346047e07","abstract_canon_sha256":"ca12e59bc106110e4a34b94e6e7e0e4966ab96c8b1044e01d7f722a9a725e480"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:28.000476Z","signature_b64":"rh9BH6+8sdvwD5WTOanw0RFqcwFZQsY3Ljb+45uRNWJrd6pShMqMNrzxUQB9GPpavjAQQ6dHNjG3SUITwiTwDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7bcba2313e78d71069fd45efee1a4f1293e9339c0c1fd630981d673d4bfb4f13","last_reissued_at":"2026-05-18T00:01:27.999959Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:27.999959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Project AMIGA: Distance and Metallicity Gradients Along Andromeda's Giant Southern Stream from the Red Clump","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Jason S. Kalirai, John M. O'Meara, Karoline M. Gilbert, Kathleen A. Barger, Luciana Bianchi, Molly S. Peeples, Nicolas Lehner, Puragra Guhathakurta, Roger E. Cohen, Thomas M. Brown","submitted_at":"2018-10-02T21:25:29Z","abstract_excerpt":"The Giant Southern Stream (GSS) of M31, a keystone signature of a major accretion event, yields crucial constraints on M31 formation and evolution models. Currently, our understanding of the GSS, in terms of both its geometry and its chemistry, results from either wide-field imaging probing only a few magnitudes below the red giant branch tip, or deep imaging or spectroscopy of isolated regions. Here, we take an alternative approach, using Hubble Space Telescope (HST) imaging to characterize the horizontal branch red clump (RC) using unbinned maximum likelihood fits to luminosity functions (LF"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.01525","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1810.01525","created_at":"2026-05-18T00:01:28.000043+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.01525v1","created_at":"2026-05-18T00:01:28.000043+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.01525","created_at":"2026-05-18T00:01:28.000043+00:00"},{"alias_kind":"pith_short_12","alias_value":"PPF2EMJ6PDLR","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_16","alias_value":"PPF2EMJ6PDLRA2P5","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_8","alias_value":"PPF2EMJ6","created_at":"2026-05-18T12:32:46.962924+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK","json":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK.json","graph_json":"https://pith.science/api/pith-number/PPF2EMJ6PDLRA2P5IXX64GSPCK/graph.json","events_json":"https://pith.science/api/pith-number/PPF2EMJ6PDLRA2P5IXX64GSPCK/events.json","paper":"https://pith.science/paper/PPF2EMJ6"},"agent_actions":{"view_html":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK","download_json":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK.json","view_paper":"https://pith.science/paper/PPF2EMJ6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.01525&json=true","fetch_graph":"https://pith.science/api/pith-number/PPF2EMJ6PDLRA2P5IXX64GSPCK/graph.json","fetch_events":"https://pith.science/api/pith-number/PPF2EMJ6PDLRA2P5IXX64GSPCK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK/action/storage_attestation","attest_author":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK/action/author_attestation","sign_citation":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK/action/citation_signature","submit_replication":"https://pith.science/pith/PPF2EMJ6PDLRA2P5IXX64GSPCK/action/replication_record"}},"created_at":"2026-05-18T00:01:28.000043+00:00","updated_at":"2026-05-18T00:01:28.000043+00:00"}