{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:L4Y6MK4XKU4XE55P52Y47GUY3U","short_pith_number":"pith:L4Y6MK4X","canonical_record":{"source":{"id":"1602.07719","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-24T21:38:35Z","cross_cats_sorted":[],"title_canon_sha256":"8014be077e55b1586f9ac58d45b68e6429dcf6a618f88670c553854dc2faf6f3","abstract_canon_sha256":"c02780b167cc749866ac5d4df9105f441863836806a3633e2e9eb6c1e70729b5"},"schema_version":"1.0"},"canonical_sha256":"5f31e62b9755397277afeeb1cf9a98dd017cce7df737f17e11241c739731b2fb","source":{"kind":"arxiv","id":"1602.07719","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07719","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07719v1","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07719","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"pith_short_12","alias_value":"L4Y6MK4XKU4X","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"L4Y6MK4XKU4XE55P","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"L4Y6MK4X","created_at":"2026-05-18T12:30:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:L4Y6MK4XKU4XE55P52Y47GUY3U","target":"record","payload":{"canonical_record":{"source":{"id":"1602.07719","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-24T21:38:35Z","cross_cats_sorted":[],"title_canon_sha256":"8014be077e55b1586f9ac58d45b68e6429dcf6a618f88670c553854dc2faf6f3","abstract_canon_sha256":"c02780b167cc749866ac5d4df9105f441863836806a3633e2e9eb6c1e70729b5"},"schema_version":"1.0"},"canonical_sha256":"5f31e62b9755397277afeeb1cf9a98dd017cce7df737f17e11241c739731b2fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:17.192847Z","signature_b64":"6mhfWqGMFiUfiQ4cxsyigjroBLKHq2wC4/D5Uv5L9pcBfzY9VrYmyUvla+zLthYjBFWu6WlxpqHcyty0YIiOBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f31e62b9755397277afeeb1cf9a98dd017cce7df737f17e11241c739731b2fb","last_reissued_at":"2026-05-18T01:17:17.192350Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:17.192350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.07719","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":"2026-05-18T01:17:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vi6aWUXsHgM+P9OL3tKtJSp0sUgqHFaRc2Cppvz4jtphv32XjGULXxp5xlYMEW8Ogn7Wpjjsq07w5tENTi43Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T12:48:59.148336Z"},"content_sha256":"33c4e4b2c339bddb4f02c19effeccee69c803ed010d9c5ad2888b06885c1dfff","schema_version":"1.0","event_id":"sha256:33c4e4b2c339bddb4f02c19effeccee69c803ed010d9c5ad2888b06885c1dfff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:L4Y6MK4XKU4XE55P52Y47GUY3U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Carbon gas in SMC low-metallicity star-forming regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Risacher, F. P. Israel, H. Zinnecker, J. Stutzki, M. A. Requena-Torres, R. Guesten, R. Simon, Y. Okada","submitted_at":"2016-02-24T21:38:35Z","abstract_excerpt":"This paper presents [CII], [CI] and CO emission line maps of the star-forming regions N66, N25+N26, and N88 in the metal-poor Local Group dwarf galaxy SMC. The spatial and velocity structure of the large HII region N66 reveals an expanding ring of shocked molecular gas centered on the exciting star cluster NGC346, whereas a more distant dense molecular cloud is being eroded by UV radiation from the same cluster. In the N25+N26 and N88 maps, diffuse [CII] emission at a relatively low surface brightness extends well beyond the compact boundaries of the bright emission associated with the [CII] r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07719","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":"2026-05-18T01:17:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"moKFKG9gUOGWfMXyTgvYDXVYRbtbZx2aNOY+p1ja67CUWl025F3CwexnHbc95enVOZyHPFfmPUSjK0vZzbLNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T12:48:59.148844Z"},"content_sha256":"919f877803222346101d240b7fbebf2f9606abb13f80aba4ec6f80118e5ea49f","schema_version":"1.0","event_id":"sha256:919f877803222346101d240b7fbebf2f9606abb13f80aba4ec6f80118e5ea49f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/bundle.json","state_url":"https://pith.science/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/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":"2026-06-02T12:48:59Z","links":{"resolver":"https://pith.science/pith/L4Y6MK4XKU4XE55P52Y47GUY3U","bundle":"https://pith.science/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/bundle.json","state":"https://pith.science/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L4Y6MK4XKU4XE55P52Y47GUY3U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:L4Y6MK4XKU4XE55P52Y47GUY3U","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":"c02780b167cc749866ac5d4df9105f441863836806a3633e2e9eb6c1e70729b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-24T21:38:35Z","title_canon_sha256":"8014be077e55b1586f9ac58d45b68e6429dcf6a618f88670c553854dc2faf6f3"},"schema_version":"1.0","source":{"id":"1602.07719","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07719","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07719v1","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07719","created_at":"2026-05-18T01:17:17Z"},{"alias_kind":"pith_short_12","alias_value":"L4Y6MK4XKU4X","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"L4Y6MK4XKU4XE55P","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"L4Y6MK4X","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:919f877803222346101d240b7fbebf2f9606abb13f80aba4ec6f80118e5ea49f","target":"graph","created_at":"2026-05-18T01:17:17Z","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":"This paper presents [CII], [CI] and CO emission line maps of the star-forming regions N66, N25+N26, and N88 in the metal-poor Local Group dwarf galaxy SMC. The spatial and velocity structure of the large HII region N66 reveals an expanding ring of shocked molecular gas centered on the exciting star cluster NGC346, whereas a more distant dense molecular cloud is being eroded by UV radiation from the same cluster. In the N25+N26 and N88 maps, diffuse [CII] emission at a relatively low surface brightness extends well beyond the compact boundaries of the bright emission associated with the [CII] r","authors_text":"C. Risacher, F. P. Israel, H. Zinnecker, J. Stutzki, M. A. Requena-Torres, R. Guesten, R. Simon, Y. Okada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-24T21:38:35Z","title":"Carbon gas in SMC low-metallicity star-forming regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07719","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":"sha256:33c4e4b2c339bddb4f02c19effeccee69c803ed010d9c5ad2888b06885c1dfff","target":"record","created_at":"2026-05-18T01:17:17Z","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":"c02780b167cc749866ac5d4df9105f441863836806a3633e2e9eb6c1e70729b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-24T21:38:35Z","title_canon_sha256":"8014be077e55b1586f9ac58d45b68e6429dcf6a618f88670c553854dc2faf6f3"},"schema_version":"1.0","source":{"id":"1602.07719","kind":"arxiv","version":1}},"canonical_sha256":"5f31e62b9755397277afeeb1cf9a98dd017cce7df737f17e11241c739731b2fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f31e62b9755397277afeeb1cf9a98dd017cce7df737f17e11241c739731b2fb","first_computed_at":"2026-05-18T01:17:17.192350Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:17.192350Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6mhfWqGMFiUfiQ4cxsyigjroBLKHq2wC4/D5Uv5L9pcBfzY9VrYmyUvla+zLthYjBFWu6WlxpqHcyty0YIiOBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:17.192847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.07719","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33c4e4b2c339bddb4f02c19effeccee69c803ed010d9c5ad2888b06885c1dfff","sha256:919f877803222346101d240b7fbebf2f9606abb13f80aba4ec6f80118e5ea49f"],"state_sha256":"857af6db0f63a7bc99f7f6c98832f528a75e326282b00815d5b5676886999b20"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A0sZHz5FYgEU4bO2lxciOW+46zCfT2ipdo68HDktX9qoPwWypGvLysatFrSOi5ACMMJUkrQIeLzVvwi+fa5qBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T12:48:59.151194Z","bundle_sha256":"bd7142dc92caecdffd56da316bef02e23607baa2fccd4f408f335d3f23ba40cb"}}