{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NT4CRNMXQJXDDXGQRLQV2GIEKI","short_pith_number":"pith:NT4CRNMX","canonical_record":{"source":{"id":"1803.05912","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-15T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"7bd5484811b5d5e24a52a97f7203e6e11f1fa33c1be5f496f5fc6ce9214ba800","abstract_canon_sha256":"4b7e17c218440be89c3fbe5f69b37328692e51177b7f6e4548b7bfd8d33d48ea"},"schema_version":"1.0"},"canonical_sha256":"6cf828b597826e31dcd08ae15d19045227e16d4c04016a78b6f7e0f4a72de36c","source":{"kind":"arxiv","id":"1803.05912","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.05912","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"arxiv_version","alias_value":"1803.05912v2","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.05912","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"pith_short_12","alias_value":"NT4CRNMXQJXD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NT4CRNMXQJXDDXGQ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NT4CRNMX","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NT4CRNMXQJXDDXGQRLQV2GIEKI","target":"record","payload":{"canonical_record":{"source":{"id":"1803.05912","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-15T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"7bd5484811b5d5e24a52a97f7203e6e11f1fa33c1be5f496f5fc6ce9214ba800","abstract_canon_sha256":"4b7e17c218440be89c3fbe5f69b37328692e51177b7f6e4548b7bfd8d33d48ea"},"schema_version":"1.0"},"canonical_sha256":"6cf828b597826e31dcd08ae15d19045227e16d4c04016a78b6f7e0f4a72de36c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:17.977749Z","signature_b64":"gm4Uz4+Guqi3AYiJCRTFDy4EJTjhifL7eXS5STGVtEvAnlIVuq4wHUqVnpcoqBWd8l0SjtSePeLgjPWr7PPnDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cf828b597826e31dcd08ae15d19045227e16d4c04016a78b6f7e0f4a72de36c","last_reissued_at":"2026-05-18T00:12:17.977091Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:17.977091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.05912","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":"2026-05-18T00:12:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xJh3/tBmd+AgdppeZoOF1tQ5u6v5QTI49oou0T0jcVbYoF1RKaa97yekjOSd703ttYjSM8uAHFsxFGWkcF4BDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:41:24.370856Z"},"content_sha256":"059ea14feb5157db66699a2b92bcff29c1327d088e1b95a9f63a0a53a19c67f3","schema_version":"1.0","event_id":"sha256:059ea14feb5157db66699a2b92bcff29c1327d088e1b95a9f63a0a53a19c67f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NT4CRNMXQJXDDXGQRLQV2GIEKI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The redshift evolution of rest-UV spectroscopic properties in Lyman Break Galaxies at z ~ 2-4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alice E. Shapley, Allison L. Strom, Charles C. Steidel, Daniel P. Stark, Dawn K. Erb, Gwen C. Rudie, Max Pettini, Naveen A. Reddy, Richard S. Ellis, Tucker Jones, Xinnan Du","submitted_at":"2018-03-15T18:00:01Z","abstract_excerpt":"We present the first comprehensive evolutionary analysis of the rest-frame UV spectroscopic properties of star-forming galaxies at z ~ 2-4. We match samples at different redshifts in UV luminosity and stellar mass, and perform systematic measurements of spectral features and stellar population modeling. By creating composite spectra grouped according to Ly$\\alpha$ equivalent width (EW), and various galaxy properties, we study the evolutionary trends among Ly$\\alpha$, low- and high-ionization interstellar (LIS and HIS) absorption features, and integrated galaxy properties. We also examine the r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05912","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":"2026-05-18T00:12:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ftTj5n6SEF5mEP4JMkBUbSpONLgA3hyDMWB4rDnQU5Ms+CACK12WmzAaC7pBhN5g/4jQO23XL0DKbV4u8majDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:41:24.371579Z"},"content_sha256":"0d867a111be4aefa0ed4244af52774e38754901b6a7b1cd175e2d61409ca5b0d","schema_version":"1.0","event_id":"sha256:0d867a111be4aefa0ed4244af52774e38754901b6a7b1cd175e2d61409ca5b0d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/bundle.json","state_url":"https://pith.science/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/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":"2026-06-06T15:41:24Z","links":{"resolver":"https://pith.science/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI","bundle":"https://pith.science/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/bundle.json","state":"https://pith.science/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NT4CRNMXQJXDDXGQRLQV2GIEKI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NT4CRNMXQJXDDXGQRLQV2GIEKI","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":"4b7e17c218440be89c3fbe5f69b37328692e51177b7f6e4548b7bfd8d33d48ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-15T18:00:01Z","title_canon_sha256":"7bd5484811b5d5e24a52a97f7203e6e11f1fa33c1be5f496f5fc6ce9214ba800"},"schema_version":"1.0","source":{"id":"1803.05912","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.05912","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"arxiv_version","alias_value":"1803.05912v2","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.05912","created_at":"2026-05-18T00:12:17Z"},{"alias_kind":"pith_short_12","alias_value":"NT4CRNMXQJXD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NT4CRNMXQJXDDXGQ","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NT4CRNMX","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:0d867a111be4aefa0ed4244af52774e38754901b6a7b1cd175e2d61409ca5b0d","target":"graph","created_at":"2026-05-18T00:12:17Z","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 the first comprehensive evolutionary analysis of the rest-frame UV spectroscopic properties of star-forming galaxies at z ~ 2-4. We match samples at different redshifts in UV luminosity and stellar mass, and perform systematic measurements of spectral features and stellar population modeling. By creating composite spectra grouped according to Ly$\\alpha$ equivalent width (EW), and various galaxy properties, we study the evolutionary trends among Ly$\\alpha$, low- and high-ionization interstellar (LIS and HIS) absorption features, and integrated galaxy properties. We also examine the r","authors_text":"Alice E. Shapley, Allison L. Strom, Charles C. Steidel, Daniel P. Stark, Dawn K. Erb, Gwen C. Rudie, Max Pettini, Naveen A. Reddy, Richard S. Ellis, Tucker Jones, Xinnan Du","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-15T18:00:01Z","title":"The redshift evolution of rest-UV spectroscopic properties in Lyman Break Galaxies at z ~ 2-4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05912","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":"sha256:059ea14feb5157db66699a2b92bcff29c1327d088e1b95a9f63a0a53a19c67f3","target":"record","created_at":"2026-05-18T00:12:17Z","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":"4b7e17c218440be89c3fbe5f69b37328692e51177b7f6e4548b7bfd8d33d48ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-15T18:00:01Z","title_canon_sha256":"7bd5484811b5d5e24a52a97f7203e6e11f1fa33c1be5f496f5fc6ce9214ba800"},"schema_version":"1.0","source":{"id":"1803.05912","kind":"arxiv","version":2}},"canonical_sha256":"6cf828b597826e31dcd08ae15d19045227e16d4c04016a78b6f7e0f4a72de36c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6cf828b597826e31dcd08ae15d19045227e16d4c04016a78b6f7e0f4a72de36c","first_computed_at":"2026-05-18T00:12:17.977091Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:17.977091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gm4Uz4+Guqi3AYiJCRTFDy4EJTjhifL7eXS5STGVtEvAnlIVuq4wHUqVnpcoqBWd8l0SjtSePeLgjPWr7PPnDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:17.977749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.05912","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:059ea14feb5157db66699a2b92bcff29c1327d088e1b95a9f63a0a53a19c67f3","sha256:0d867a111be4aefa0ed4244af52774e38754901b6a7b1cd175e2d61409ca5b0d"],"state_sha256":"235aafa38d3845d2442961e4bfd0884573053bdcd52e4a9062b60962829ba1c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4KZjBDbBZrBAQ+YcyqsHKQFReOcK7qB23OHO/zvoiFqR9Fdzya2PD6ZP3tipSqMY1oLyXmstOr8oyMbBiMd2Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T15:41:24.375389Z","bundle_sha256":"8f6b5cac8d098dc8283b9d8075b2e4967d20df6663e57a7e0deb6d8f0b12b0e6"}}