{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KQIFDU4XA5Y5SXCPBTCQXUUPA3","short_pith_number":"pith:KQIFDU4X","canonical_record":{"source":{"id":"1902.10591","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-27T15:32:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5403e6963e73f97b095b67a1fdf4983c5210db7e249a2e6ea17f4f83e44fb65c","abstract_canon_sha256":"b42ad2b260e03c7a922bdec69f807fdd05b243bea086a9b2106df92d013e737e"},"schema_version":"1.0"},"canonical_sha256":"541051d3970771d95c4f0cc50bd28f06d40250d8f75c824ec7f3ba09014f5fa4","source":{"kind":"arxiv","id":"1902.10591","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.10591","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1902.10591v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.10591","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"KQIFDU4XA5Y5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KQIFDU4XA5Y5SXCP","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KQIFDU4X","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KQIFDU4XA5Y5SXCPBTCQXUUPA3","target":"record","payload":{"canonical_record":{"source":{"id":"1902.10591","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-27T15:32:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5403e6963e73f97b095b67a1fdf4983c5210db7e249a2e6ea17f4f83e44fb65c","abstract_canon_sha256":"b42ad2b260e03c7a922bdec69f807fdd05b243bea086a9b2106df92d013e737e"},"schema_version":"1.0"},"canonical_sha256":"541051d3970771d95c4f0cc50bd28f06d40250d8f75c824ec7f3ba09014f5fa4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:25.888783Z","signature_b64":"lshrgWjn/k1kFYh7Qr/eAAHS1loD+33H8nZO5MU8JAMNCE/wTrk4/mfmBSvQgRSPttpZU6EQcptjK+WO7D3CBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"541051d3970771d95c4f0cc50bd28f06d40250d8f75c824ec7f3ba09014f5fa4","last_reissued_at":"2026-05-17T23:47:25.888035Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:25.888035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.10591","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":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rw3FHAdVpnHID+3yLjI9LdX249gXzyQZzTtOl1nZMHjEdrRxY2iJdS0PBOujN9aRzssidfrvWWrr7lc55/KcCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:41:22.741388Z"},"content_sha256":"4876a7f4c8905e31a61dc7120e70a1f46b0f65c3da7e3305caae742ae5ea77e9","schema_version":"1.0","event_id":"sha256:4876a7f4c8905e31a61dc7120e70a1f46b0f65c3da7e3305caae742ae5ea77e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KQIFDU4XA5Y5SXCPBTCQXUUPA3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Variable Stars in Sagittarius Globular Clusters I. Arp~2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Barton J. Pritzl, Horace A. Smith, Jura Borissova, M\\'arcio Catelan, Ricardo Salinas, Thomas C. Gehrman","submitted_at":"2019-02-27T15:32:02Z","abstract_excerpt":"We present new photometry and analysis of the twelve variable stars (nine RR Lyrae, three SX Phoenicis) belonging to the Sagittarius globular cluster Arp 2. Of the nine RR Lyrae stars in the cluster, eight are RRab and one is RRc. From the RRab stars, we determined a mean period of $\\langle P_{ab}\\rangle=0.581\\pm0.047$ days, where the error is the standard error of the mean. This places Arp 2 at the border between the Oosterhoff I and Oosterhoff-Int clusters. Using the $V$-band data from the RR Lyrae stars, a distance modulus of $(m-M)_0=17.24\\pm0.17$ was determined. From the $I$-band data, we"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10591","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+vpyabp+bq8TF3ZNo2vz7bXLbDffc/NjWoyUkBAPiOEJKshMCHe7zW27U+NKljolMTMLgZfAbfbj97DC/JXCAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T23:41:22.741852Z"},"content_sha256":"d3d2f582659871bacdc2d2ecfdc2b74b8bf620b6861a3a88d90632ac63d294de","schema_version":"1.0","event_id":"sha256:d3d2f582659871bacdc2d2ecfdc2b74b8bf620b6861a3a88d90632ac63d294de"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/bundle.json","state_url":"https://pith.science/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/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":"2026-05-23T23:41:22Z","links":{"resolver":"https://pith.science/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3","bundle":"https://pith.science/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/bundle.json","state":"https://pith.science/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KQIFDU4XA5Y5SXCPBTCQXUUPA3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KQIFDU4XA5Y5SXCPBTCQXUUPA3","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":"b42ad2b260e03c7a922bdec69f807fdd05b243bea086a9b2106df92d013e737e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-27T15:32:02Z","title_canon_sha256":"5403e6963e73f97b095b67a1fdf4983c5210db7e249a2e6ea17f4f83e44fb65c"},"schema_version":"1.0","source":{"id":"1902.10591","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.10591","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1902.10591v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.10591","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"KQIFDU4XA5Y5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KQIFDU4XA5Y5SXCP","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KQIFDU4X","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:d3d2f582659871bacdc2d2ecfdc2b74b8bf620b6861a3a88d90632ac63d294de","target":"graph","created_at":"2026-05-17T23:47:25Z","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 present new photometry and analysis of the twelve variable stars (nine RR Lyrae, three SX Phoenicis) belonging to the Sagittarius globular cluster Arp 2. Of the nine RR Lyrae stars in the cluster, eight are RRab and one is RRc. From the RRab stars, we determined a mean period of $\\langle P_{ab}\\rangle=0.581\\pm0.047$ days, where the error is the standard error of the mean. This places Arp 2 at the border between the Oosterhoff I and Oosterhoff-Int clusters. Using the $V$-band data from the RR Lyrae stars, a distance modulus of $(m-M)_0=17.24\\pm0.17$ was determined. From the $I$-band data, we","authors_text":"Barton J. Pritzl, Horace A. Smith, Jura Borissova, M\\'arcio Catelan, Ricardo Salinas, Thomas C. Gehrman","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-27T15:32:02Z","title":"Variable Stars in Sagittarius Globular Clusters I. Arp~2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10591","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":"sha256:4876a7f4c8905e31a61dc7120e70a1f46b0f65c3da7e3305caae742ae5ea77e9","target":"record","created_at":"2026-05-17T23:47:25Z","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":"b42ad2b260e03c7a922bdec69f807fdd05b243bea086a9b2106df92d013e737e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-27T15:32:02Z","title_canon_sha256":"5403e6963e73f97b095b67a1fdf4983c5210db7e249a2e6ea17f4f83e44fb65c"},"schema_version":"1.0","source":{"id":"1902.10591","kind":"arxiv","version":1}},"canonical_sha256":"541051d3970771d95c4f0cc50bd28f06d40250d8f75c824ec7f3ba09014f5fa4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"541051d3970771d95c4f0cc50bd28f06d40250d8f75c824ec7f3ba09014f5fa4","first_computed_at":"2026-05-17T23:47:25.888035Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:25.888035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lshrgWjn/k1kFYh7Qr/eAAHS1loD+33H8nZO5MU8JAMNCE/wTrk4/mfmBSvQgRSPttpZU6EQcptjK+WO7D3CBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:25.888783Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.10591","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4876a7f4c8905e31a61dc7120e70a1f46b0f65c3da7e3305caae742ae5ea77e9","sha256:d3d2f582659871bacdc2d2ecfdc2b74b8bf620b6861a3a88d90632ac63d294de"],"state_sha256":"064d93c9f156cc751458427d077fb264945d05a4d4aec218f9e96ac6c87f0d09"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nx5Cp28e4h2XvSx/lRSZBOzF6pH6DIB9Qs8G8HMCAtrai8iCsRY8qPcuC/dHHzzGGOgLpCSV8AOI4g8xtvcXBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T23:41:22.745564Z","bundle_sha256":"10dd2f1ca8e32b3d52946b526a19c87e05aeced13c353f412184413f48186f8f"}}