{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:5HC523TSYWZXHQ6LEHMCOX5MAD","short_pith_number":"pith:5HC523TS","canonical_record":{"source":{"id":"1803.10164","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-27T16:18:23Z","cross_cats_sorted":[],"title_canon_sha256":"12e97bdc202af99df52f99bc6ca304b4b5806f92e8caa12e98e4a0529bbdaf89","abstract_canon_sha256":"dc9c499a4c5aea428678f31d1de817086e720fffeec3670e17ddcaf7a42455c6"},"schema_version":"1.0"},"canonical_sha256":"e9c5dd6e72c5b373c3cb21d8275fac00c95877d290ab266567944296965a0930","source":{"kind":"arxiv","id":"1803.10164","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10164","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10164v1","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10164","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"5HC523TSYWZX","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5HC523TSYWZXHQ6L","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5HC523TS","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:5HC523TSYWZXHQ6LEHMCOX5MAD","target":"record","payload":{"canonical_record":{"source":{"id":"1803.10164","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-27T16:18:23Z","cross_cats_sorted":[],"title_canon_sha256":"12e97bdc202af99df52f99bc6ca304b4b5806f92e8caa12e98e4a0529bbdaf89","abstract_canon_sha256":"dc9c499a4c5aea428678f31d1de817086e720fffeec3670e17ddcaf7a42455c6"},"schema_version":"1.0"},"canonical_sha256":"e9c5dd6e72c5b373c3cb21d8275fac00c95877d290ab266567944296965a0930","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:15.286541Z","signature_b64":"5q6vkJeZW5jsRACscoAFkxV3YVI2/w0myCEJq+kl+KOJDhd5Pc+c0BAdvRIZAQBdeEtpFYdjWz8nVJHCarSNDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9c5dd6e72c5b373c3cb21d8275fac00c95877d290ab266567944296965a0930","last_reissued_at":"2026-05-18T00:09:15.285932Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:15.285932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.10164","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":"2026-05-18T00:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"etWOgsEtmbflElhArKUhlJ/puVHO9nXl7OIsQtQkuzkzI8dX15GgTpDsOVFNrtGt6QJP5MmzYZEBj0+Ca8uCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:40:48.259811Z"},"content_sha256":"0bc9a36b5cd50c095726c94d447afbe6ffff62f0fa342f4e5165fb978f63151e","schema_version":"1.0","event_id":"sha256:0bc9a36b5cd50c095726c94d447afbe6ffff62f0fa342f4e5165fb978f63151e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:5HC523TSYWZXHQ6LEHMCOX5MAD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unveiling the remarkable photodissociation region of M8","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. Klein, C. Henkel, F. Wyrowski, H. Wiesemeyer, J.P. P\\'erez-Beaupuits, K.M. Menten, M. Tiwari, R. G\\\"usten","submitted_at":"2018-03-27T16:18:23Z","abstract_excerpt":"Messier 8 is one of the brightest HII regions in the sky. Using SOFIA, APEX 12 m and IRAM 30 m telescopes, we have performed a comprehensive imaging survey of the emission from the [CII], [CI] and CO isotopologues within 1.3 $\\times$ 1.3 pc around the dominant Herschel 36 (Her 36) stellar system. To further explore the morphology of the region we compare archival infrared, optical and radio images of the nebula with our newly obtained [CII] and CO data. We perform a quantitative analysis, using both LTE and non-LTE methods to determine the abundances of some of the observed species as well as "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10164","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":"2026-05-18T00:09:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HxOiJn/7+hrU9gmXUCyV5Im7XheZR1w2ghh4G4rw0veNR1woJZ25tJIossLS7SUdfAJvfGZEeKiE5yqVInQuDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:40:48.260161Z"},"content_sha256":"7eed8d8748905b2a5868dcf9d52908f99c6c7e839fd103354121101a9485636a","schema_version":"1.0","event_id":"sha256:7eed8d8748905b2a5868dcf9d52908f99c6c7e839fd103354121101a9485636a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/bundle.json","state_url":"https://pith.science/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/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":"2026-06-05T02:40:48Z","links":{"resolver":"https://pith.science/pith/5HC523TSYWZXHQ6LEHMCOX5MAD","bundle":"https://pith.science/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/bundle.json","state":"https://pith.science/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5HC523TSYWZXHQ6LEHMCOX5MAD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5HC523TSYWZXHQ6LEHMCOX5MAD","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":"dc9c499a4c5aea428678f31d1de817086e720fffeec3670e17ddcaf7a42455c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-27T16:18:23Z","title_canon_sha256":"12e97bdc202af99df52f99bc6ca304b4b5806f92e8caa12e98e4a0529bbdaf89"},"schema_version":"1.0","source":{"id":"1803.10164","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10164","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10164v1","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10164","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"5HC523TSYWZX","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5HC523TSYWZXHQ6L","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5HC523TS","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:7eed8d8748905b2a5868dcf9d52908f99c6c7e839fd103354121101a9485636a","target":"graph","created_at":"2026-05-18T00:09:15Z","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":"Messier 8 is one of the brightest HII regions in the sky. Using SOFIA, APEX 12 m and IRAM 30 m telescopes, we have performed a comprehensive imaging survey of the emission from the [CII], [CI] and CO isotopologues within 1.3 $\\times$ 1.3 pc around the dominant Herschel 36 (Her 36) stellar system. To further explore the morphology of the region we compare archival infrared, optical and radio images of the nebula with our newly obtained [CII] and CO data. We perform a quantitative analysis, using both LTE and non-LTE methods to determine the abundances of some of the observed species as well as ","authors_text":"B. Klein, C. Henkel, F. Wyrowski, H. Wiesemeyer, J.P. P\\'erez-Beaupuits, K.M. Menten, M. Tiwari, R. G\\\"usten","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-27T16:18:23Z","title":"Unveiling the remarkable photodissociation region of M8"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10164","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":"sha256:0bc9a36b5cd50c095726c94d447afbe6ffff62f0fa342f4e5165fb978f63151e","target":"record","created_at":"2026-05-18T00:09:15Z","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":"dc9c499a4c5aea428678f31d1de817086e720fffeec3670e17ddcaf7a42455c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-27T16:18:23Z","title_canon_sha256":"12e97bdc202af99df52f99bc6ca304b4b5806f92e8caa12e98e4a0529bbdaf89"},"schema_version":"1.0","source":{"id":"1803.10164","kind":"arxiv","version":1}},"canonical_sha256":"e9c5dd6e72c5b373c3cb21d8275fac00c95877d290ab266567944296965a0930","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9c5dd6e72c5b373c3cb21d8275fac00c95877d290ab266567944296965a0930","first_computed_at":"2026-05-18T00:09:15.285932Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:15.285932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5q6vkJeZW5jsRACscoAFkxV3YVI2/w0myCEJq+kl+KOJDhd5Pc+c0BAdvRIZAQBdeEtpFYdjWz8nVJHCarSNDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:15.286541Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.10164","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0bc9a36b5cd50c095726c94d447afbe6ffff62f0fa342f4e5165fb978f63151e","sha256:7eed8d8748905b2a5868dcf9d52908f99c6c7e839fd103354121101a9485636a"],"state_sha256":"c1ce5c9c748881c2e1a9ff2d5aaa11ce39d5c6b1cb8429ac9183fb21402ac5ad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JXpxxpAl1KTZT1A25xwzCi50cqPiWHyBqzC/mowg4KNpUastPWMQHELhwMRLFVOHxnfLFFKcXQGEytpD9Ld1AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T02:40:48.262169Z","bundle_sha256":"f1b28d6b4da88421092bb6232da565d534e603a4a5293ce90b505a2e30efb55c"}}