{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:C7VHWYDOMDUBMVFBKOI2BHWEAN","short_pith_number":"pith:C7VHWYDO","canonical_record":{"source":{"id":"1901.11306","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-31T11:18:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"99c1aaebc568c8dad6a27105e9da7b7adb93fc27c4f72e56fde3e183358c189c","abstract_canon_sha256":"ef5d8979aae7db1707d2c7269ae6ba015cc9cac55c76feeabd90b0ac33f1a490"},"schema_version":"1.0"},"canonical_sha256":"17ea7b606e60e81654a15391a09ec40353a60ff0de3979d5f0f4f622e26978a2","source":{"kind":"arxiv","id":"1901.11306","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.11306","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"arxiv_version","alias_value":"1901.11306v1","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.11306","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"pith_short_12","alias_value":"C7VHWYDOMDUB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"C7VHWYDOMDUBMVFB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"C7VHWYDO","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:C7VHWYDOMDUBMVFBKOI2BHWEAN","target":"record","payload":{"canonical_record":{"source":{"id":"1901.11306","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-31T11:18:02Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"99c1aaebc568c8dad6a27105e9da7b7adb93fc27c4f72e56fde3e183358c189c","abstract_canon_sha256":"ef5d8979aae7db1707d2c7269ae6ba015cc9cac55c76feeabd90b0ac33f1a490"},"schema_version":"1.0"},"canonical_sha256":"17ea7b606e60e81654a15391a09ec40353a60ff0de3979d5f0f4f622e26978a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:20.571032Z","signature_b64":"CNrC3RgtiOmBL7Q3b9NAQDBKVlvymCZQc0abnvdiY8qRXSrTOIe9sPP5jXuJ6u2F09V6Ufn/OuDnp2BNDWHOAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17ea7b606e60e81654a15391a09ec40353a60ff0de3979d5f0f4f622e26978a2","last_reissued_at":"2026-05-17T23:53:20.570352Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:20.570352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.11306","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":"2026-05-17T23:53:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SwDM1vTs3HT9yKL5p+oXcMXAXpdOpjxJ4Z8A8MaOEcr3YfsZ3e/IjhSrq4tnhsw0mI+TZnLoorEKCVkns5RyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:52:10.406471Z"},"content_sha256":"b3912664669c23db61dc03bae55654c600425b85d4616165420d2947d0e88bad","schema_version":"1.0","event_id":"sha256:b3912664669c23db61dc03bae55654c600425b85d4616165420d2947d0e88bad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:C7VHWYDOMDUBMVFBKOI2BHWEAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simulating the atomic and molecular content of molecular clouds using probability distributions of physical parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Andreas Schruba, Ewine F. van Dishoeck, Thomas G. Bisbas","submitted_at":"2019-01-31T11:18:02Z","abstract_excerpt":"Modern observations of the interstellar medium (ISM) in galaxies detect a variety of atomic and molecular species. The goal is to connect these observations to the astrochemical properties of the ISM. 3D hydro-chemical simulations attempt this but due to extreme computational cost, they have to rely on simplified chemical networks and are bound to individual case studies. We present an alternative approach which models the ISM at larger scales by an ensemble of pre-calculated 1D thermo-chemical photodissociation region (PDR) calculations that determine the abundance and excitation of atomic an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.11306","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":"2026-05-17T23:53:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r597qvsfAjGrkaLUWLgZxt0lp7bRdVqjRVmMH8SuSFsrlmI9cGzcy1RKTdaNHbxPB8aKerVPJ/kr+mp7isN7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:52:10.407044Z"},"content_sha256":"e55bf5a43fd3929522de5c1abe21bd2e9ef91547b26b24865b11467cd657051c","schema_version":"1.0","event_id":"sha256:e55bf5a43fd3929522de5c1abe21bd2e9ef91547b26b24865b11467cd657051c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/bundle.json","state_url":"https://pith.science/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/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":"2026-06-05T02:52:10Z","links":{"resolver":"https://pith.science/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN","bundle":"https://pith.science/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/bundle.json","state":"https://pith.science/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C7VHWYDOMDUBMVFBKOI2BHWEAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:C7VHWYDOMDUBMVFBKOI2BHWEAN","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":"ef5d8979aae7db1707d2c7269ae6ba015cc9cac55c76feeabd90b0ac33f1a490","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-31T11:18:02Z","title_canon_sha256":"99c1aaebc568c8dad6a27105e9da7b7adb93fc27c4f72e56fde3e183358c189c"},"schema_version":"1.0","source":{"id":"1901.11306","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.11306","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"arxiv_version","alias_value":"1901.11306v1","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.11306","created_at":"2026-05-17T23:53:20Z"},{"alias_kind":"pith_short_12","alias_value":"C7VHWYDOMDUB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"C7VHWYDOMDUBMVFB","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"C7VHWYDO","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:e55bf5a43fd3929522de5c1abe21bd2e9ef91547b26b24865b11467cd657051c","target":"graph","created_at":"2026-05-17T23:53:20Z","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":"Modern observations of the interstellar medium (ISM) in galaxies detect a variety of atomic and molecular species. The goal is to connect these observations to the astrochemical properties of the ISM. 3D hydro-chemical simulations attempt this but due to extreme computational cost, they have to rely on simplified chemical networks and are bound to individual case studies. We present an alternative approach which models the ISM at larger scales by an ensemble of pre-calculated 1D thermo-chemical photodissociation region (PDR) calculations that determine the abundance and excitation of atomic an","authors_text":"Andreas Schruba, Ewine F. van Dishoeck, Thomas G. Bisbas","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-31T11:18:02Z","title":"Simulating the atomic and molecular content of molecular clouds using probability distributions of physical parameters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.11306","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:b3912664669c23db61dc03bae55654c600425b85d4616165420d2947d0e88bad","target":"record","created_at":"2026-05-17T23:53:20Z","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":"ef5d8979aae7db1707d2c7269ae6ba015cc9cac55c76feeabd90b0ac33f1a490","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-31T11:18:02Z","title_canon_sha256":"99c1aaebc568c8dad6a27105e9da7b7adb93fc27c4f72e56fde3e183358c189c"},"schema_version":"1.0","source":{"id":"1901.11306","kind":"arxiv","version":1}},"canonical_sha256":"17ea7b606e60e81654a15391a09ec40353a60ff0de3979d5f0f4f622e26978a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17ea7b606e60e81654a15391a09ec40353a60ff0de3979d5f0f4f622e26978a2","first_computed_at":"2026-05-17T23:53:20.570352Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:20.570352Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CNrC3RgtiOmBL7Q3b9NAQDBKVlvymCZQc0abnvdiY8qRXSrTOIe9sPP5jXuJ6u2F09V6Ufn/OuDnp2BNDWHOAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:20.571032Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.11306","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3912664669c23db61dc03bae55654c600425b85d4616165420d2947d0e88bad","sha256:e55bf5a43fd3929522de5c1abe21bd2e9ef91547b26b24865b11467cd657051c"],"state_sha256":"b30adc2a2a5c17040ff94b9bcdb4c4d9c6e8660ba7b6caf9d942c106a2a1d1e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MUF1xemUpLnW+wxwMqrBPYyIISJoRJlOgbr0G+TunJ3MK9ceGOU6LatIrHdf8RiEb4XiK5pzAttRKq+znbN3CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T02:52:10.409223Z","bundle_sha256":"e152480a5aa80f801fcf6678fbb7645f4be83a35b6371a2e0b0f415b3bba5323"}}