{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:LWZSFL7ET4H2GGCA3ST7ZZQYQY","short_pith_number":"pith:LWZSFL7E","schema_version":"1.0","canonical_sha256":"5db322afe49f0fa31840dca7fce618860ac25d712e93006f166ff3b420267aee","source":{"kind":"arxiv","id":"1508.01800","version":1},"attestation_state":"computed","paper":{"title":"Antlia B: A faint dwarf galaxy member of the NGC 3109 association","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. Willman, C.J. Grillmair, D. Crnojevi\\'c, D. J. Sand, J. R. Hargis, J. Strader, K. Spekkens","submitted_at":"2015-08-07T20:03:51Z","abstract_excerpt":"We report the discovery of Antlia B, a faint dwarf galaxy at a projected distance of $\\sim$72 kpc from NGC 3109 ($M_{V}$$\\sim$$-$15 mag), the primary galaxy of the NGC 3109 dwarf association at the edge of the Local Group. The tip of the red giant branch distance to Antlia B is $D$=1.29$\\pm$0.10 Mpc, which is consistent with the distance to NGC 3109. A qualitative analysis indicates the new dwarf's stellar population has both an old, metal poor red giant branch ($\\gtrsim$10 Gyr, [Fe/H]$\\sim$$-$2), and a younger blue population with an age of $\\sim$200-400 Myr, analogous to the original Antlia "},"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":"1508.01800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-07T20:03:51Z","cross_cats_sorted":[],"title_canon_sha256":"d1e1ef1b703528f5d56fc8033ebf223373f3191d2330057d7b91ae2d26a75ce3","abstract_canon_sha256":"ca183acbc4bc0d54330530347f623052b94d31271b9acea0ac4d367899cf2a40"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:46.118256Z","signature_b64":"g5FnJqPmYuzvwo0BbtW3pD3PcsjHVZPCk5P+8m/plGMmV9U6ZSOAW4VBxhwrinsxrCaUW7gAhIv3LtpW4bI4AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5db322afe49f0fa31840dca7fce618860ac25d712e93006f166ff3b420267aee","last_reissued_at":"2026-05-18T01:09:46.117635Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:46.117635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Antlia B: A faint dwarf galaxy member of the NGC 3109 association","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. Willman, C.J. Grillmair, D. Crnojevi\\'c, D. J. Sand, J. R. Hargis, J. Strader, K. Spekkens","submitted_at":"2015-08-07T20:03:51Z","abstract_excerpt":"We report the discovery of Antlia B, a faint dwarf galaxy at a projected distance of $\\sim$72 kpc from NGC 3109 ($M_{V}$$\\sim$$-$15 mag), the primary galaxy of the NGC 3109 dwarf association at the edge of the Local Group. The tip of the red giant branch distance to Antlia B is $D$=1.29$\\pm$0.10 Mpc, which is consistent with the distance to NGC 3109. A qualitative analysis indicates the new dwarf's stellar population has both an old, metal poor red giant branch ($\\gtrsim$10 Gyr, [Fe/H]$\\sim$$-$2), and a younger blue population with an age of $\\sim$200-400 Myr, analogous to the original Antlia "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01800","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":"1508.01800","created_at":"2026-05-18T01:09:46.117725+00:00"},{"alias_kind":"arxiv_version","alias_value":"1508.01800v1","created_at":"2026-05-18T01:09:46.117725+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01800","created_at":"2026-05-18T01:09:46.117725+00:00"},{"alias_kind":"pith_short_12","alias_value":"LWZSFL7ET4H2","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_16","alias_value":"LWZSFL7ET4H2GGCA","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_8","alias_value":"LWZSFL7E","created_at":"2026-05-18T12:29:29.992203+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/LWZSFL7ET4H2GGCA3ST7ZZQYQY","json":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY.json","graph_json":"https://pith.science/api/pith-number/LWZSFL7ET4H2GGCA3ST7ZZQYQY/graph.json","events_json":"https://pith.science/api/pith-number/LWZSFL7ET4H2GGCA3ST7ZZQYQY/events.json","paper":"https://pith.science/paper/LWZSFL7E"},"agent_actions":{"view_html":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY","download_json":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY.json","view_paper":"https://pith.science/paper/LWZSFL7E","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1508.01800&json=true","fetch_graph":"https://pith.science/api/pith-number/LWZSFL7ET4H2GGCA3ST7ZZQYQY/graph.json","fetch_events":"https://pith.science/api/pith-number/LWZSFL7ET4H2GGCA3ST7ZZQYQY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY/action/storage_attestation","attest_author":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY/action/author_attestation","sign_citation":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY/action/citation_signature","submit_replication":"https://pith.science/pith/LWZSFL7ET4H2GGCA3ST7ZZQYQY/action/replication_record"}},"created_at":"2026-05-18T01:09:46.117725+00:00","updated_at":"2026-05-18T01:09:46.117725+00:00"}