{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:AV24NQVLAFJI3LE4BLWEJT3BIW","short_pith_number":"pith:AV24NQVL","canonical_record":{"source":{"id":"1311.5092","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-19T20:25:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"875f36ba65f81e5833bacc8f3e898fb877db000f780d8cdbfa69a56da6dd7c9b","abstract_canon_sha256":"b0e178723ed671c707873e8bf4350058858641bb513bba38eb201c623f56552f"},"schema_version":"1.0"},"canonical_sha256":"0575c6c2ab01528dac9c0aec44cf6145aee90fac2425152547d3d81732b954f2","source":{"kind":"arxiv","id":"1311.5092","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5092","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5092v2","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5092","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"pith_short_12","alias_value":"AV24NQVLAFJI","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AV24NQVLAFJI3LE4","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AV24NQVL","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:AV24NQVLAFJI3LE4BLWEJT3BIW","target":"record","payload":{"canonical_record":{"source":{"id":"1311.5092","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-19T20:25:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"875f36ba65f81e5833bacc8f3e898fb877db000f780d8cdbfa69a56da6dd7c9b","abstract_canon_sha256":"b0e178723ed671c707873e8bf4350058858641bb513bba38eb201c623f56552f"},"schema_version":"1.0"},"canonical_sha256":"0575c6c2ab01528dac9c0aec44cf6145aee90fac2425152547d3d81732b954f2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:12.139232Z","signature_b64":"AHs3RoX7kP1RM0PWwE8Y3UTvq6WytTVO8KaLLR94DBy7+HVjRra+HZh+m8qSI0ZKi/5HtNc4eFDCB5tV1M6WAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0575c6c2ab01528dac9c0aec44cf6145aee90fac2425152547d3d81732b954f2","last_reissued_at":"2026-05-18T01:46:12.138568Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:12.138568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.5092","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":"2026-05-18T01:46:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kAY3B1+MX1N/vN/IM2CeaHLdMSmQ4UoNErszpymDdxnLWdOccarByENDYdB6U53aOZLCgJKcZB5H9eSWGD99DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:46:59.967874Z"},"content_sha256":"8d9996c8fdf00d0b3ad807abd51a0f9ff70d40e779cc26f2d98d8086e7a51a09","schema_version":"1.0","event_id":"sha256:8d9996c8fdf00d0b3ad807abd51a0f9ff70d40e779cc26f2d98d8086e7a51a09"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:AV24NQVLAFJI3LE4BLWEJT3BIW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Testing metallicity indicators at z~1.4 with the gravitationally lensed galaxy CASSOWARY 20","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alice E. Shapley, Anna M. Quider, Bethan L. James, Charles C. Steidel, George D. Becker, Lindsay J. King, Lise Christensen, Matthew W. Auger, Max Pettini","submitted_at":"2013-11-19T20:25:39Z","abstract_excerpt":"We present X-shooter observations of CASSOWARY 20 (CSWA 20), a star-forming (SFR ~6 Msol/yr) galaxy at z=1.433, magnified by a factor of 11.5 by the gravitational lensing produced by a massive foreground galaxy at z=0.741. We analysed the integrated physical properties of the HII regions of CSWA 20 using temperature- and density-sensitive emission lines. We find the abundance of oxygen to be ~1/7 of solar, while carbon is ~50 times less abundant than in the Sun. The unusually low C/O ratio may be an indication of a particularly rapid timescale of chemical enrichment. The wide wavelength covera"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5092","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":"2026-05-18T01:46:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XFYnVri8k0PAjqVwmgbKqHC6pZweuT1j8t7/2mp5UyKj9Qz7pSyPHOPhTW5kEflOcFaXzuc5VxU81Uveq7KdDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:46:59.968577Z"},"content_sha256":"e98ea1832271e5158455e86d5cf9b13d39a543d8ba79c0d44fac40e72f810bca","schema_version":"1.0","event_id":"sha256:e98ea1832271e5158455e86d5cf9b13d39a543d8ba79c0d44fac40e72f810bca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/bundle.json","state_url":"https://pith.science/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/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":"2026-06-06T06:46:59Z","links":{"resolver":"https://pith.science/pith/AV24NQVLAFJI3LE4BLWEJT3BIW","bundle":"https://pith.science/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/bundle.json","state":"https://pith.science/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AV24NQVLAFJI3LE4BLWEJT3BIW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:AV24NQVLAFJI3LE4BLWEJT3BIW","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":"b0e178723ed671c707873e8bf4350058858641bb513bba38eb201c623f56552f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-19T20:25:39Z","title_canon_sha256":"875f36ba65f81e5833bacc8f3e898fb877db000f780d8cdbfa69a56da6dd7c9b"},"schema_version":"1.0","source":{"id":"1311.5092","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.5092","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"arxiv_version","alias_value":"1311.5092v2","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.5092","created_at":"2026-05-18T01:46:12Z"},{"alias_kind":"pith_short_12","alias_value":"AV24NQVLAFJI","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AV24NQVLAFJI3LE4","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AV24NQVL","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:e98ea1832271e5158455e86d5cf9b13d39a543d8ba79c0d44fac40e72f810bca","target":"graph","created_at":"2026-05-18T01:46:12Z","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 X-shooter observations of CASSOWARY 20 (CSWA 20), a star-forming (SFR ~6 Msol/yr) galaxy at z=1.433, magnified by a factor of 11.5 by the gravitational lensing produced by a massive foreground galaxy at z=0.741. We analysed the integrated physical properties of the HII regions of CSWA 20 using temperature- and density-sensitive emission lines. We find the abundance of oxygen to be ~1/7 of solar, while carbon is ~50 times less abundant than in the Sun. The unusually low C/O ratio may be an indication of a particularly rapid timescale of chemical enrichment. The wide wavelength covera","authors_text":"Alice E. Shapley, Anna M. Quider, Bethan L. James, Charles C. Steidel, George D. Becker, Lindsay J. King, Lise Christensen, Matthew W. Auger, Max Pettini","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-19T20:25:39Z","title":"Testing metallicity indicators at z~1.4 with the gravitationally lensed galaxy CASSOWARY 20"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.5092","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":"sha256:8d9996c8fdf00d0b3ad807abd51a0f9ff70d40e779cc26f2d98d8086e7a51a09","target":"record","created_at":"2026-05-18T01:46:12Z","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":"b0e178723ed671c707873e8bf4350058858641bb513bba38eb201c623f56552f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-11-19T20:25:39Z","title_canon_sha256":"875f36ba65f81e5833bacc8f3e898fb877db000f780d8cdbfa69a56da6dd7c9b"},"schema_version":"1.0","source":{"id":"1311.5092","kind":"arxiv","version":2}},"canonical_sha256":"0575c6c2ab01528dac9c0aec44cf6145aee90fac2425152547d3d81732b954f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0575c6c2ab01528dac9c0aec44cf6145aee90fac2425152547d3d81732b954f2","first_computed_at":"2026-05-18T01:46:12.138568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:12.138568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AHs3RoX7kP1RM0PWwE8Y3UTvq6WytTVO8KaLLR94DBy7+HVjRra+HZh+m8qSI0ZKi/5HtNc4eFDCB5tV1M6WAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:12.139232Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.5092","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d9996c8fdf00d0b3ad807abd51a0f9ff70d40e779cc26f2d98d8086e7a51a09","sha256:e98ea1832271e5158455e86d5cf9b13d39a543d8ba79c0d44fac40e72f810bca"],"state_sha256":"0db509470aea9d539bdbc3b34aea29d40fafe9bdf0a19011338ed5d2cd6e948e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p6JyKNrnHHJgqQpuW1aiYqtAT/lquXDY0W1YmzZ23BKbPp4fE6mF6y5q34Xv2itdQIxuXw+/2vwBdc8J9ijJDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T06:46:59.972636Z","bundle_sha256":"22f6529296fe3801da6d89eb08941bda88dab390d02e85cfb1e4f722410aa91c"}}