{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6FVWIDOHIEAFW5YGQPECWAHYPU","short_pith_number":"pith:6FVWIDOH","canonical_record":{"source":{"id":"1903.02192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-06T06:23:54Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"1fbd55ee0dc62c72e41e4122b7fc0e4d483b37e6877d72ab4ce4af5f060f0d52","abstract_canon_sha256":"f45ddb9ff2e285aefd0c2a734d719a1cca47480dd817b377ce2f5fe134a06b26"},"schema_version":"1.0"},"canonical_sha256":"f16b640dc741005b770683c82b00f87d0e2427e2a392413221453bfe6669ecbe","source":{"kind":"arxiv","id":"1903.02192","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02192","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02192v1","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02192","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"pith_short_12","alias_value":"6FVWIDOHIEAF","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6FVWIDOHIEAFW5YG","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6FVWIDOH","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6FVWIDOHIEAFW5YGQPECWAHYPU","target":"record","payload":{"canonical_record":{"source":{"id":"1903.02192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-06T06:23:54Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"1fbd55ee0dc62c72e41e4122b7fc0e4d483b37e6877d72ab4ce4af5f060f0d52","abstract_canon_sha256":"f45ddb9ff2e285aefd0c2a734d719a1cca47480dd817b377ce2f5fe134a06b26"},"schema_version":"1.0"},"canonical_sha256":"f16b640dc741005b770683c82b00f87d0e2427e2a392413221453bfe6669ecbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:57.854637Z","signature_b64":"Mv2icsvVPAOpWx2ysL8sO0u+XZwYvyx6+7gonZl0UOaOeFt4xBvoUaAb5Rk6DkM+V8FMmofkHNkYOxa8wSSSBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f16b640dc741005b770683c82b00f87d0e2427e2a392413221453bfe6669ecbe","last_reissued_at":"2026-05-17T23:47:57.854153Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:57.854153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.02192","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":"2026-05-17T23:47:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+0x5A+HY+Uy1TjpckZVPAX4rt5aQ5Hg7hxcswFNCksL3P9w+jAl9SoL8OG5iMOAUhhGcw2IjM7UJwGwkuv5uCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:48:49.362668Z"},"content_sha256":"3c8a46523213aa5cd0214e4279cafc453df05f34fc3f79e60e698748a68fe5dd","schema_version":"1.0","event_id":"sha256:3c8a46523213aa5cd0214e4279cafc453df05f34fc3f79e60e698748a68fe5dd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6FVWIDOHIEAFW5YGQPECWAHYPU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ALMA observations of layered structures due to CO selective dissociation in the $\\rho$ Ophiuchi A plane-parallel PDR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.GA","authors_text":"C. Hara, F. Nakamura, H. Nomura, J. Di Francesco, M. Yamagishi, R. Kawabe, S. Takakuwa, T. Kamazaki, T. Takekoshi, Y. Shimajiri","submitted_at":"2019-03-06T06:23:54Z","abstract_excerpt":"We analyze $^{12}$CO($J$=2-1), $^{13}$CO($J$=2-1), C$^{18}$O ($J$=2-1), and 1.3 mm continuum maps of the $\\rho$ Ophiuchi A photo-dissociation region (PDR) obtained with ALMA. Layered structures of the three CO isotopologues with an angular separation of 10 arcsec = 6.6$\\times$10$^{-3}$ pc = 1400 au are clearly detected around the Be star, S1 (i.e., each front of emission shifts from the near to far side in order of $^{12}$CO, $^{13}$CO, and C$^{18}$O). We estimate the spatial variations of $X$($^{13}$CO)/$X$(C$^{18}$O) abundance ratios, and find that the abundance ratio is as high as 40 near t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02192","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":"2026-05-17T23:47:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M1vFVLnGwYR/C8v3vnYzrUbopnFki/vJaYn4ONkN6eAcVk2dS6gFyVUhZtJ1a4hyTwka8hTMDeQC4oBKQVJjBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T15:48:49.363459Z"},"content_sha256":"61d9f98cdfa4b04bf4897c13ee3940a6305b6d35129aa9a28b3a790229e6afd0","schema_version":"1.0","event_id":"sha256:61d9f98cdfa4b04bf4897c13ee3940a6305b6d35129aa9a28b3a790229e6afd0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/bundle.json","state_url":"https://pith.science/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/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":"2026-05-31T15:48:49Z","links":{"resolver":"https://pith.science/pith/6FVWIDOHIEAFW5YGQPECWAHYPU","bundle":"https://pith.science/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/bundle.json","state":"https://pith.science/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6FVWIDOHIEAFW5YGQPECWAHYPU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6FVWIDOHIEAFW5YGQPECWAHYPU","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":"f45ddb9ff2e285aefd0c2a734d719a1cca47480dd817b377ce2f5fe134a06b26","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-06T06:23:54Z","title_canon_sha256":"1fbd55ee0dc62c72e41e4122b7fc0e4d483b37e6877d72ab4ce4af5f060f0d52"},"schema_version":"1.0","source":{"id":"1903.02192","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02192","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02192v1","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02192","created_at":"2026-05-17T23:47:57Z"},{"alias_kind":"pith_short_12","alias_value":"6FVWIDOHIEAF","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6FVWIDOHIEAFW5YG","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6FVWIDOH","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:61d9f98cdfa4b04bf4897c13ee3940a6305b6d35129aa9a28b3a790229e6afd0","target":"graph","created_at":"2026-05-17T23:47:57Z","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 analyze $^{12}$CO($J$=2-1), $^{13}$CO($J$=2-1), C$^{18}$O ($J$=2-1), and 1.3 mm continuum maps of the $\\rho$ Ophiuchi A photo-dissociation region (PDR) obtained with ALMA. Layered structures of the three CO isotopologues with an angular separation of 10 arcsec = 6.6$\\times$10$^{-3}$ pc = 1400 au are clearly detected around the Be star, S1 (i.e., each front of emission shifts from the near to far side in order of $^{12}$CO, $^{13}$CO, and C$^{18}$O). We estimate the spatial variations of $X$($^{13}$CO)/$X$(C$^{18}$O) abundance ratios, and find that the abundance ratio is as high as 40 near t","authors_text":"C. Hara, F. Nakamura, H. Nomura, J. Di Francesco, M. Yamagishi, R. Kawabe, S. Takakuwa, T. Kamazaki, T. Takekoshi, Y. Shimajiri","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-06T06:23:54Z","title":"ALMA observations of layered structures due to CO selective dissociation in the $\\rho$ Ophiuchi A plane-parallel PDR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02192","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":"sha256:3c8a46523213aa5cd0214e4279cafc453df05f34fc3f79e60e698748a68fe5dd","target":"record","created_at":"2026-05-17T23:47:57Z","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":"f45ddb9ff2e285aefd0c2a734d719a1cca47480dd817b377ce2f5fe134a06b26","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-06T06:23:54Z","title_canon_sha256":"1fbd55ee0dc62c72e41e4122b7fc0e4d483b37e6877d72ab4ce4af5f060f0d52"},"schema_version":"1.0","source":{"id":"1903.02192","kind":"arxiv","version":1}},"canonical_sha256":"f16b640dc741005b770683c82b00f87d0e2427e2a392413221453bfe6669ecbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f16b640dc741005b770683c82b00f87d0e2427e2a392413221453bfe6669ecbe","first_computed_at":"2026-05-17T23:47:57.854153Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:57.854153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Mv2icsvVPAOpWx2ysL8sO0u+XZwYvyx6+7gonZl0UOaOeFt4xBvoUaAb5Rk6DkM+V8FMmofkHNkYOxa8wSSSBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:57.854637Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.02192","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c8a46523213aa5cd0214e4279cafc453df05f34fc3f79e60e698748a68fe5dd","sha256:61d9f98cdfa4b04bf4897c13ee3940a6305b6d35129aa9a28b3a790229e6afd0"],"state_sha256":"26172c8a3efbf91429ce468db0a06c03802d10d9f18c05564887c7aa4b0e9f80"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kEUgixcmDL5utdGKIZKJ53lsZKjqpmMrzvh62JvSdm98dFS/xYDaf6jZUdI+H9G3k+TKS081VSwte4scnyAwDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T15:48:49.368172Z","bundle_sha256":"4ceddfda71b2056ebc25947907f6ebc72de42aed2908e3a76076996e969e864b"}}