{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:P7BSBH6FFI3DOE5CFB3DGIEWUV","short_pith_number":"pith:P7BSBH6F","canonical_record":{"source":{"id":"1804.08245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-23T05:16:54Z","cross_cats_sorted":[],"title_canon_sha256":"0987ff622f1875a4bea56a384c545a9697bc0a258a167f7c830eed8c002299e5","abstract_canon_sha256":"730e2170bed87e8529b174a01adc6f14be0ba7e96c219029814feec257f4a2ef"},"schema_version":"1.0"},"canonical_sha256":"7fc3209fc52a363713a22876332096a54abdf37a1bb0afd3e7508077c66b6b39","source":{"kind":"arxiv","id":"1804.08245","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08245","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08245v1","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08245","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"pith_short_12","alias_value":"P7BSBH6FFI3D","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7BSBH6FFI3DOE5C","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7BSBH6F","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:P7BSBH6FFI3DOE5CFB3DGIEWUV","target":"record","payload":{"canonical_record":{"source":{"id":"1804.08245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-23T05:16:54Z","cross_cats_sorted":[],"title_canon_sha256":"0987ff622f1875a4bea56a384c545a9697bc0a258a167f7c830eed8c002299e5","abstract_canon_sha256":"730e2170bed87e8529b174a01adc6f14be0ba7e96c219029814feec257f4a2ef"},"schema_version":"1.0"},"canonical_sha256":"7fc3209fc52a363713a22876332096a54abdf37a1bb0afd3e7508077c66b6b39","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:34.304720Z","signature_b64":"Nw7QRcsuqbnvBzF8YGRjMY9XmI6yF0eyJiBGUfdt4H4kcR+r2xf1twX/0c6YGO2jKOGDDU6ehoazB5PRG7m/AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fc3209fc52a363713a22876332096a54abdf37a1bb0afd3e7508077c66b6b39","last_reissued_at":"2026-05-18T00:11:34.304143Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:34.304143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.08245","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":"2026-05-18T00:11:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rom3A32r1LPgFjHcOBG+tyR9OLu6boDy4CR5lDySW0dCSNUqVdZ+WkU2lrv0jCYz87ALsT+mX5SXtxeO7ReeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:42:40.334606Z"},"content_sha256":"57da81d8b9a0a35406940600f94d8cf65b6c70dbcfb9ff1b114d5c2009151c09","schema_version":"1.0","event_id":"sha256:57da81d8b9a0a35406940600f94d8cf65b6c70dbcfb9ff1b114d5c2009151c09"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:P7BSBH6FFI3DOE5CFB3DGIEWUV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chemical survey toward young stellar objects in the Perseus molecular cloud complex","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ana Lopez-Sepulcre, Aya E. Higuchi, Bertrand Lefloch, Cecilia Ceccarelli, Claudio Codella, Kento Yoshida, Muneaki Imai, Nami Sakai, Rafael Bachiller, Satoshi Yamamoto, Takeshi Sakai, Tomoya Hirota, Yichen Zhang, Yoko Oya, Yoshimasa Watanabe","submitted_at":"2018-04-23T05:16:54Z","abstract_excerpt":"Chemical diversity of the gas in low-mass protostellar cores is widely recognized. In order to explore its origin, a survey of chemical composition toward 36 Class 0/I protostars in the Perseus molecular cloud complex, which are selected in an unbiased way under certain physical conditions, has been conducted with IRAM 30 m and NRO 45 m telescope. Multiple lines of C2H, c-C3H2 and CH3OH have been observed to characterize the chemical composition averaged over a 1000 au scale around the protostar. The derived beam-averaged column densities show significant chemical diversity among the sources, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08245","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":"2026-05-18T00:11:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"njNJiYDzoq30SttNzONoB7b8VR9cbT+n2VTWz3SeKPc+v5QU/y6UrFHRoIvhKBVUw2F868T4486y4sPbsZaRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:42:40.335307Z"},"content_sha256":"efcca15c363652d08a1b4606afd649df6cd365ba72f8cb6c3b608a457ef6e72a","schema_version":"1.0","event_id":"sha256:efcca15c363652d08a1b4606afd649df6cd365ba72f8cb6c3b608a457ef6e72a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/bundle.json","state_url":"https://pith.science/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/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":"2026-05-30T08:42:40Z","links":{"resolver":"https://pith.science/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV","bundle":"https://pith.science/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/bundle.json","state":"https://pith.science/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7BSBH6FFI3DOE5CFB3DGIEWUV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:P7BSBH6FFI3DOE5CFB3DGIEWUV","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":"730e2170bed87e8529b174a01adc6f14be0ba7e96c219029814feec257f4a2ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-23T05:16:54Z","title_canon_sha256":"0987ff622f1875a4bea56a384c545a9697bc0a258a167f7c830eed8c002299e5"},"schema_version":"1.0","source":{"id":"1804.08245","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08245","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08245v1","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08245","created_at":"2026-05-18T00:11:34Z"},{"alias_kind":"pith_short_12","alias_value":"P7BSBH6FFI3D","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7BSBH6FFI3DOE5C","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7BSBH6F","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:efcca15c363652d08a1b4606afd649df6cd365ba72f8cb6c3b608a457ef6e72a","target":"graph","created_at":"2026-05-18T00:11:34Z","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":"Chemical diversity of the gas in low-mass protostellar cores is widely recognized. In order to explore its origin, a survey of chemical composition toward 36 Class 0/I protostars in the Perseus molecular cloud complex, which are selected in an unbiased way under certain physical conditions, has been conducted with IRAM 30 m and NRO 45 m telescope. Multiple lines of C2H, c-C3H2 and CH3OH have been observed to characterize the chemical composition averaged over a 1000 au scale around the protostar. The derived beam-averaged column densities show significant chemical diversity among the sources, ","authors_text":"Ana Lopez-Sepulcre, Aya E. Higuchi, Bertrand Lefloch, Cecilia Ceccarelli, Claudio Codella, Kento Yoshida, Muneaki Imai, Nami Sakai, Rafael Bachiller, Satoshi Yamamoto, Takeshi Sakai, Tomoya Hirota, Yichen Zhang, Yoko Oya, Yoshimasa Watanabe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-23T05:16:54Z","title":"Chemical survey toward young stellar objects in the Perseus molecular cloud complex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08245","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":"sha256:57da81d8b9a0a35406940600f94d8cf65b6c70dbcfb9ff1b114d5c2009151c09","target":"record","created_at":"2026-05-18T00:11:34Z","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":"730e2170bed87e8529b174a01adc6f14be0ba7e96c219029814feec257f4a2ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-23T05:16:54Z","title_canon_sha256":"0987ff622f1875a4bea56a384c545a9697bc0a258a167f7c830eed8c002299e5"},"schema_version":"1.0","source":{"id":"1804.08245","kind":"arxiv","version":1}},"canonical_sha256":"7fc3209fc52a363713a22876332096a54abdf37a1bb0afd3e7508077c66b6b39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fc3209fc52a363713a22876332096a54abdf37a1bb0afd3e7508077c66b6b39","first_computed_at":"2026-05-18T00:11:34.304143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:34.304143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nw7QRcsuqbnvBzF8YGRjMY9XmI6yF0eyJiBGUfdt4H4kcR+r2xf1twX/0c6YGO2jKOGDDU6ehoazB5PRG7m/AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:34.304720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.08245","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57da81d8b9a0a35406940600f94d8cf65b6c70dbcfb9ff1b114d5c2009151c09","sha256:efcca15c363652d08a1b4606afd649df6cd365ba72f8cb6c3b608a457ef6e72a"],"state_sha256":"c693d888b974ca85bd26147d14aaaea8859600f070a8bd21530c538781207954"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yk6l5e7bTZAmLounDwSL9CymqImpTQ+xmNxmp9O7GE+zYgeTVJUn2zwjnXizS00GqmQkJzRRadLw5e8TPAzPAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:42:40.339006Z","bundle_sha256":"75b2699809a6f8957dfbbf6ca4a3916c43ca3810640662d9cb46d546af17178a"}}