{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:KD2KDIQOP24EHJUPMWRFCGDK3S","short_pith_number":"pith:KD2KDIQO","canonical_record":{"source":{"id":"1612.04908","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-15T02:34:11Z","cross_cats_sorted":[],"title_canon_sha256":"1d93c46419ed63f85c202d217f2ad87bd08e0c8cc43f8200407e4b8bb3b6cc8d","abstract_canon_sha256":"f8a1bb41c3263074bce73702e559b1471575559065ab62fe7e214de46728c28e"},"schema_version":"1.0"},"canonical_sha256":"50f4a1a20e7eb843a68f65a251186adc95d74a7bec62f52668cf74030175e6ee","source":{"kind":"arxiv","id":"1612.04908","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.04908","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"arxiv_version","alias_value":"1612.04908v2","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.04908","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"pith_short_12","alias_value":"KD2KDIQOP24E","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KD2KDIQOP24EHJUP","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KD2KDIQO","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:KD2KDIQOP24EHJUPMWRFCGDK3S","target":"record","payload":{"canonical_record":{"source":{"id":"1612.04908","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-15T02:34:11Z","cross_cats_sorted":[],"title_canon_sha256":"1d93c46419ed63f85c202d217f2ad87bd08e0c8cc43f8200407e4b8bb3b6cc8d","abstract_canon_sha256":"f8a1bb41c3263074bce73702e559b1471575559065ab62fe7e214de46728c28e"},"schema_version":"1.0"},"canonical_sha256":"50f4a1a20e7eb843a68f65a251186adc95d74a7bec62f52668cf74030175e6ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:22.950422Z","signature_b64":"cRoIHHfO2hIQrQexG7vZEcG77NxwcWgVDUycZhLXaxmMbXKxz1nVeRVTKcfEb0Lsgey18/y9yd6e2XzN0yjmAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"50f4a1a20e7eb843a68f65a251186adc95d74a7bec62f52668cf74030175e6ee","last_reissued_at":"2026-05-18T00:49:22.949845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:22.949845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.04908","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":"2026-05-18T00:49:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/dclA/VWohvL52zqXo48fkooyTBpeQK7Gz0sMA6yFze3lRNN6AqZ7qTLTvA6mps4Cl6s+eK2hMrPsu2kIK31Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:16:14.932421Z"},"content_sha256":"e65731c76a98a4a0c788872d645b951001324a2f7f95a77bb7ff802857d760d2","schema_version":"1.0","event_id":"sha256:e65731c76a98a4a0c788872d645b951001324a2f7f95a77bb7ff802857d760d2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:KD2KDIQOP24EHJUPMWRFCGDK3S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-scale environmental dependence of the abundance ratio of nitrogen to oxygen in blue, star-forming galaxies fainter than L*","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Kelly A. Douglass, Michael S. Vogeley","submitted_at":"2016-12-15T02:34:11Z","abstract_excerpt":"We examine how the cosmic environment affects the chemical evolution of galaxies in the Universe by comparing the N/O ratio of dwarf galaxies in voids with dwarf galaxies in more dense regions. Ratios of the forbidden [O III] and [S II] transitions provide estimates of a region's electron temperature and number density. We estimate the abundances of oxygen and nitrogen using these temperature and density estimates and the emission line fluxes [O II] 3727, [O III] 4959, 5007, and [N II] 6548, 6584 with the direct Te method. Using spectroscopic observations from the Sloan Digital Sky Survey Data"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.04908","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":"2026-05-18T00:49:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+AXthA25kd3u8eCIwTTktAIgJsnfy3gsVXw1NmG+j+noQnMnaXTQcMiUNeEICraou78vMWdNPqmWen4+n1KyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:16:14.933071Z"},"content_sha256":"c6c4eac96b215d1abec51106c22a53b982c1a10deacbba4561058c611f9d1e8e","schema_version":"1.0","event_id":"sha256:c6c4eac96b215d1abec51106c22a53b982c1a10deacbba4561058c611f9d1e8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/bundle.json","state_url":"https://pith.science/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/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":"2026-06-05T15:16:14Z","links":{"resolver":"https://pith.science/pith/KD2KDIQOP24EHJUPMWRFCGDK3S","bundle":"https://pith.science/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/bundle.json","state":"https://pith.science/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KD2KDIQOP24EHJUPMWRFCGDK3S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:KD2KDIQOP24EHJUPMWRFCGDK3S","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":"f8a1bb41c3263074bce73702e559b1471575559065ab62fe7e214de46728c28e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-15T02:34:11Z","title_canon_sha256":"1d93c46419ed63f85c202d217f2ad87bd08e0c8cc43f8200407e4b8bb3b6cc8d"},"schema_version":"1.0","source":{"id":"1612.04908","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.04908","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"arxiv_version","alias_value":"1612.04908v2","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.04908","created_at":"2026-05-18T00:49:22Z"},{"alias_kind":"pith_short_12","alias_value":"KD2KDIQOP24E","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KD2KDIQOP24EHJUP","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KD2KDIQO","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:c6c4eac96b215d1abec51106c22a53b982c1a10deacbba4561058c611f9d1e8e","target":"graph","created_at":"2026-05-18T00:49:22Z","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 examine how the cosmic environment affects the chemical evolution of galaxies in the Universe by comparing the N/O ratio of dwarf galaxies in voids with dwarf galaxies in more dense regions. Ratios of the forbidden [O III] and [S II] transitions provide estimates of a region's electron temperature and number density. We estimate the abundances of oxygen and nitrogen using these temperature and density estimates and the emission line fluxes [O II] 3727, [O III] 4959, 5007, and [N II] 6548, 6584 with the direct Te method. Using spectroscopic observations from the Sloan Digital Sky Survey Data","authors_text":"Kelly A. Douglass, Michael S. Vogeley","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-15T02:34:11Z","title":"Large-scale environmental dependence of the abundance ratio of nitrogen to oxygen in blue, star-forming galaxies fainter than L*"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.04908","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:e65731c76a98a4a0c788872d645b951001324a2f7f95a77bb7ff802857d760d2","target":"record","created_at":"2026-05-18T00:49:22Z","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":"f8a1bb41c3263074bce73702e559b1471575559065ab62fe7e214de46728c28e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-15T02:34:11Z","title_canon_sha256":"1d93c46419ed63f85c202d217f2ad87bd08e0c8cc43f8200407e4b8bb3b6cc8d"},"schema_version":"1.0","source":{"id":"1612.04908","kind":"arxiv","version":2}},"canonical_sha256":"50f4a1a20e7eb843a68f65a251186adc95d74a7bec62f52668cf74030175e6ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50f4a1a20e7eb843a68f65a251186adc95d74a7bec62f52668cf74030175e6ee","first_computed_at":"2026-05-18T00:49:22.949845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:22.949845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cRoIHHfO2hIQrQexG7vZEcG77NxwcWgVDUycZhLXaxmMbXKxz1nVeRVTKcfEb0Lsgey18/y9yd6e2XzN0yjmAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:22.950422Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.04908","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e65731c76a98a4a0c788872d645b951001324a2f7f95a77bb7ff802857d760d2","sha256:c6c4eac96b215d1abec51106c22a53b982c1a10deacbba4561058c611f9d1e8e"],"state_sha256":"de9eb05fb8d1f51215e1d804e877d366127a7c3b5d08febf7ade89f93742784d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vkbw3OyZUzkUM7YOplbO9JmLxIxRkcOa43n65eepQS47PidDEiC4P3DKOOG6PbcC9ER4q3g3MPL4GsKZkdovAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:16:14.936333Z","bundle_sha256":"4714bc8b964b865dda95dc10f039ae2a7f1a618a38e0be1a7a31d384d47ee120"}}