{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:R75PEFOKW25ZCJAKRR7TUZCAPA","short_pith_number":"pith:R75PEFOK","canonical_record":{"source":{"id":"2203.11788","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-03-22T14:49:14Z","cross_cats_sorted":[],"title_canon_sha256":"3d7a0063e981dfef73adfe7ba62800f6f02116082dcf3325e13320270dd65b21","abstract_canon_sha256":"0c687b59ddc4f46b0731247d16ece35243b47ff3c85ce2c350e35078cc0b6683"},"schema_version":"1.0"},"canonical_sha256":"8ffaf215cab6bb91240a8c7f3a644078374e90c1b8faccfd3dffeaa2926466ad","source":{"kind":"arxiv","id":"2203.11788","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.11788","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"arxiv_version","alias_value":"2203.11788v1","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.11788","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_12","alias_value":"R75PEFOKW25Z","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_16","alias_value":"R75PEFOKW25ZCJAK","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_8","alias_value":"R75PEFOK","created_at":"2026-07-05T05:35:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:R75PEFOKW25ZCJAKRR7TUZCAPA","target":"record","payload":{"canonical_record":{"source":{"id":"2203.11788","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-03-22T14:49:14Z","cross_cats_sorted":[],"title_canon_sha256":"3d7a0063e981dfef73adfe7ba62800f6f02116082dcf3325e13320270dd65b21","abstract_canon_sha256":"0c687b59ddc4f46b0731247d16ece35243b47ff3c85ce2c350e35078cc0b6683"},"schema_version":"1.0"},"canonical_sha256":"8ffaf215cab6bb91240a8c7f3a644078374e90c1b8faccfd3dffeaa2926466ad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:35:13.740362Z","signature_b64":"a2u7PW6sOSs2Zc83TVWIHMIZgAh3LQnlywpsrGrmT1Gdd4hfvv4ijtktg65vG3KsqWHkoyTGYlgQjOVCxh31Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ffaf215cab6bb91240a8c7f3a644078374e90c1b8faccfd3dffeaa2926466ad","last_reissued_at":"2026-07-05T05:35:13.739782Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:35:13.739782Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.11788","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":"2026-07-05T05:35:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vf4ipNrLhHqPfJziJi3B1vhnx+QJwORynTjMycB21ZubDOAgOoV9kYkYfJ+YlvMbiMX3C2c2MCiNEZh9TPfYDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:40:20.826758Z"},"content_sha256":"7364c38713ecbb69cf5de0ecfa54691b09f2437c41c5263f4d27d7703ad9b57d","schema_version":"1.0","event_id":"sha256:7364c38713ecbb69cf5de0ecfa54691b09f2437c41c5263f4d27d7703ad9b57d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:R75PEFOKW25ZCJAKRR7TUZCAPA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pegasus IV: Discovery and Spectroscopic Confirmation of an Ultra-Faint Dwarf Galaxy in the Constellation Pegasus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. B. Pace, A. Drlica-Wagner, A. E. Miller, A. H. Riley, A. K. Vivas, A. P. Ji, A. Zenteno (DELVE Collaboration), B. Mutlu-Pakdil, C. E. Mart{\\i}nez-Vazquez, C. R. Bom, D. Carollo, D. Erkal, D. Hernandez-Lang, D. J. James, D. J. Sand, D. Mart{\\i}nez-Delgado, E. J. Tollerud, G. S. Stringfellow, J. A. Carballo-Bello, J. D. Sakowska, J. D. Simon, J. L. Carlin, J. L. Nilo Castellon, K. A. G. Olsen, N. E. D. Noel, P. S. Ferguson, R. R. Munoz, S. Mau, T. S. Li, V. Manwadkar, W. Cerny, Y. Choi","submitted_at":"2022-03-22T14:49:14Z","abstract_excerpt":"We report the discovery of Pegasus IV, an ultra-faint dwarf galaxy found in archival data from the Dark Energy Camera processed by the DECam Local Volume Exploration Survey. Pegasus IV is a compact, ultra-faint stellar system ($r_{1/2} = 41^{+8}_{-6}$ pc; $M_V = -4.25 \\pm 0.2$ mag) located at a heliocentric distance of $90^{+4}_{-6}$ kpc. Based on spectra of seven non-variable member stars observed with Magellan/IMACS, we confidently resolve Pegasus IV's velocity dispersion, measuring $\\sigma_{v} = 3.3^{+1.7}_{-1.1} \\text{ km s}^{-1}$ (after excluding three velocity outliers); this implies a m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.11788","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2203.11788/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:35:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bv+8qqP+r35KOBQ+akPyx9RdoEo9Xt2Ajt94SwoS6J5wwqAZUHbArDI79VFu83ZrGxcfhc0Ioeqx9OWYvJLECQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:40:20.827282Z"},"content_sha256":"c190fb6b95093b39753eb637351a6379d2a5b113d106231b9837823abff426ce","schema_version":"1.0","event_id":"sha256:c190fb6b95093b39753eb637351a6379d2a5b113d106231b9837823abff426ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/bundle.json","state_url":"https://pith.science/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/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":"2026-08-03T20:40:20Z","links":{"resolver":"https://pith.science/pith/R75PEFOKW25ZCJAKRR7TUZCAPA","bundle":"https://pith.science/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/bundle.json","state":"https://pith.science/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R75PEFOKW25ZCJAKRR7TUZCAPA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:R75PEFOKW25ZCJAKRR7TUZCAPA","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":"0c687b59ddc4f46b0731247d16ece35243b47ff3c85ce2c350e35078cc0b6683","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-03-22T14:49:14Z","title_canon_sha256":"3d7a0063e981dfef73adfe7ba62800f6f02116082dcf3325e13320270dd65b21"},"schema_version":"1.0","source":{"id":"2203.11788","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.11788","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"arxiv_version","alias_value":"2203.11788v1","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.11788","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_12","alias_value":"R75PEFOKW25Z","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_16","alias_value":"R75PEFOKW25ZCJAK","created_at":"2026-07-05T05:35:13Z"},{"alias_kind":"pith_short_8","alias_value":"R75PEFOK","created_at":"2026-07-05T05:35:13Z"}],"graph_snapshots":[{"event_id":"sha256:c190fb6b95093b39753eb637351a6379d2a5b113d106231b9837823abff426ce","target":"graph","created_at":"2026-07-05T05:35:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2203.11788/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the discovery of Pegasus IV, an ultra-faint dwarf galaxy found in archival data from the Dark Energy Camera processed by the DECam Local Volume Exploration Survey. Pegasus IV is a compact, ultra-faint stellar system ($r_{1/2} = 41^{+8}_{-6}$ pc; $M_V = -4.25 \\pm 0.2$ mag) located at a heliocentric distance of $90^{+4}_{-6}$ kpc. Based on spectra of seven non-variable member stars observed with Magellan/IMACS, we confidently resolve Pegasus IV's velocity dispersion, measuring $\\sigma_{v} = 3.3^{+1.7}_{-1.1} \\text{ km s}^{-1}$ (after excluding three velocity outliers); this implies a m","authors_text":"A. B. Pace, A. Drlica-Wagner, A. E. Miller, A. H. Riley, A. K. Vivas, A. P. Ji, A. Zenteno (DELVE Collaboration), B. Mutlu-Pakdil, C. E. Mart{\\i}nez-Vazquez, C. R. Bom, D. Carollo, D. Erkal, D. Hernandez-Lang, D. J. James, D. J. Sand, D. Mart{\\i}nez-Delgado, E. J. Tollerud, G. S. Stringfellow, J. A. Carballo-Bello, J. D. Sakowska, J. D. Simon, J. L. Carlin, J. L. Nilo Castellon, K. A. G. Olsen, N. E. D. Noel, P. S. Ferguson, R. R. Munoz, S. Mau, T. S. Li, V. Manwadkar, W. Cerny, Y. Choi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-03-22T14:49:14Z","title":"Pegasus IV: Discovery and Spectroscopic Confirmation of an Ultra-Faint Dwarf Galaxy in the Constellation Pegasus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.11788","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":"sha256:7364c38713ecbb69cf5de0ecfa54691b09f2437c41c5263f4d27d7703ad9b57d","target":"record","created_at":"2026-07-05T05:35:13Z","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":"0c687b59ddc4f46b0731247d16ece35243b47ff3c85ce2c350e35078cc0b6683","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-03-22T14:49:14Z","title_canon_sha256":"3d7a0063e981dfef73adfe7ba62800f6f02116082dcf3325e13320270dd65b21"},"schema_version":"1.0","source":{"id":"2203.11788","kind":"arxiv","version":1}},"canonical_sha256":"8ffaf215cab6bb91240a8c7f3a644078374e90c1b8faccfd3dffeaa2926466ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ffaf215cab6bb91240a8c7f3a644078374e90c1b8faccfd3dffeaa2926466ad","first_computed_at":"2026-07-05T05:35:13.739782Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:35:13.739782Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a2u7PW6sOSs2Zc83TVWIHMIZgAh3LQnlywpsrGrmT1Gdd4hfvv4ijtktg65vG3KsqWHkoyTGYlgQjOVCxh31Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:35:13.740362Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.11788","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7364c38713ecbb69cf5de0ecfa54691b09f2437c41c5263f4d27d7703ad9b57d","sha256:c190fb6b95093b39753eb637351a6379d2a5b113d106231b9837823abff426ce"],"state_sha256":"60d688a559775dc04acd55d86efe94263fbe0f65cca353abb256a4879c39d7cc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"79Eg+arKxEWKMuRgihaYbxswHMK5S7E1stoRabbncskAqtyGdCS/yXnc6nB4v60pjAAO2BGPsVPVjIUzodtaAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T20:40:20.831129Z","bundle_sha256":"8fd1e9128407e10a1c72ad03dad62d169c396a5e443670a225d400f8c0c38507"}}