{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:4QE233IYWGA7TFB23UABHSEDJL","short_pith_number":"pith:4QE233IY","canonical_record":{"source":{"id":"2009.14238","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-29T18:11:32Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"869388fbd1af0a57ea2d03ada0dd8616a5cdc5976bddaec259ce5bbb97decf57","abstract_canon_sha256":"1da70c477da2adff385c9a348d346ae383ae796f72bd022530aceacbd73193af"},"schema_version":"1.0"},"canonical_sha256":"e409aded18b181f9943add0013c8834afadfde33958af39cd1e83ae1cc76ad79","source":{"kind":"arxiv","id":"2009.14238","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.14238","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"arxiv_version","alias_value":"2009.14238v1","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.14238","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_12","alias_value":"4QE233IYWGA7","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_16","alias_value":"4QE233IYWGA7TFB2","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_8","alias_value":"4QE233IY","created_at":"2026-07-05T02:03:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:4QE233IYWGA7TFB23UABHSEDJL","target":"record","payload":{"canonical_record":{"source":{"id":"2009.14238","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-29T18:11:32Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"869388fbd1af0a57ea2d03ada0dd8616a5cdc5976bddaec259ce5bbb97decf57","abstract_canon_sha256":"1da70c477da2adff385c9a348d346ae383ae796f72bd022530aceacbd73193af"},"schema_version":"1.0"},"canonical_sha256":"e409aded18b181f9943add0013c8834afadfde33958af39cd1e83ae1cc76ad79","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:03:46.982582Z","signature_b64":"LibZUDUKIMDcHyvafyGLQox81mo5yd2UD5gMLBw9C7E/s74nifszHm2c09p5PgSlwNV9WGSWN7D+HAmGU9bECw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e409aded18b181f9943add0013c8834afadfde33958af39cd1e83ae1cc76ad79","last_reissued_at":"2026-07-05T02:03:46.982153Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:03:46.982153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.14238","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":"2026-07-05T02:03:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pkug3az9jRVN/R7K5nTBItKZOJgPywaTszRuqdmFxmPFsaBAwbx//AI+OOEb6iIndSbyCPwzSLCLeSFeehtNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:58:19.016921Z"},"content_sha256":"e6e4ee7194e663b122c21c60e7b95b171d345ea83ad60f800e9455f81d4ca691","schema_version":"1.0","event_id":"sha256:e6e4ee7194e663b122c21c60e7b95b171d345ea83ad60f800e9455f81d4ca691"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:4QE233IYWGA7TFB23UABHSEDJL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ATLASGAL-selected massive clumps in the inner Galaxy: VIII. Chemistry of photodissociation regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"F. Wyrowski, J. P. P\\'erez-Beaupuits, J. S. Urquhart, K. M. Menten, M. Tiwari, T. Pillai, W.-J. Kim","submitted_at":"2020-09-29T18:11:32Z","abstract_excerpt":"We study ten molecular transitions obtained from an unbiased 3 mm molecular line survey using the IRAM 30 m telescope toward 409 compact dust clumps identified by the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) to understand photodissociation regions (PDRs) associated with the clumps. The main goal of this study is to investigate whether the abundances of the selected molecules show any variations resulting from the PDR chemistry in different clump environments. We selected HCO, HOC$^+$, C$_{2}$H, c-C$_{3}$H$_{2}$, CN, H$^{13}$CN, HC$^{15}$N, and HN$^{13}$C as PDR tracers, and H$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.14238","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.14238/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:03:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ioOTeJuyun2oUwlT7fXCYGb4piZ8gg8lcAps1p/bDKs0g0sHiWmOuP3gasIK68JIce0BCkKfFzLWcGpAoDG3Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:58:19.017288Z"},"content_sha256":"d4eea9dcf50c92e64642d2df3b71e71ce24380b0c5de9fde250f6178c3d18de5","schema_version":"1.0","event_id":"sha256:d4eea9dcf50c92e64642d2df3b71e71ce24380b0c5de9fde250f6178c3d18de5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4QE233IYWGA7TFB23UABHSEDJL/bundle.json","state_url":"https://pith.science/pith/4QE233IYWGA7TFB23UABHSEDJL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4QE233IYWGA7TFB23UABHSEDJL/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":"2026-07-06T20:58:19Z","links":{"resolver":"https://pith.science/pith/4QE233IYWGA7TFB23UABHSEDJL","bundle":"https://pith.science/pith/4QE233IYWGA7TFB23UABHSEDJL/bundle.json","state":"https://pith.science/pith/4QE233IYWGA7TFB23UABHSEDJL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4QE233IYWGA7TFB23UABHSEDJL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:4QE233IYWGA7TFB23UABHSEDJL","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":"1da70c477da2adff385c9a348d346ae383ae796f72bd022530aceacbd73193af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-29T18:11:32Z","title_canon_sha256":"869388fbd1af0a57ea2d03ada0dd8616a5cdc5976bddaec259ce5bbb97decf57"},"schema_version":"1.0","source":{"id":"2009.14238","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.14238","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"arxiv_version","alias_value":"2009.14238v1","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.14238","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_12","alias_value":"4QE233IYWGA7","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_16","alias_value":"4QE233IYWGA7TFB2","created_at":"2026-07-05T02:03:46Z"},{"alias_kind":"pith_short_8","alias_value":"4QE233IY","created_at":"2026-07-05T02:03:46Z"}],"graph_snapshots":[{"event_id":"sha256:d4eea9dcf50c92e64642d2df3b71e71ce24380b0c5de9fde250f6178c3d18de5","target":"graph","created_at":"2026-07-05T02:03:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.14238/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study ten molecular transitions obtained from an unbiased 3 mm molecular line survey using the IRAM 30 m telescope toward 409 compact dust clumps identified by the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) to understand photodissociation regions (PDRs) associated with the clumps. The main goal of this study is to investigate whether the abundances of the selected molecules show any variations resulting from the PDR chemistry in different clump environments. We selected HCO, HOC$^+$, C$_{2}$H, c-C$_{3}$H$_{2}$, CN, H$^{13}$CN, HC$^{15}$N, and HN$^{13}$C as PDR tracers, and H$","authors_text":"F. Wyrowski, J. P. P\\'erez-Beaupuits, J. S. Urquhart, K. M. Menten, M. Tiwari, T. Pillai, W.-J. Kim","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-29T18:11:32Z","title":"ATLASGAL-selected massive clumps in the inner Galaxy: VIII. Chemistry of photodissociation regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.14238","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:e6e4ee7194e663b122c21c60e7b95b171d345ea83ad60f800e9455f81d4ca691","target":"record","created_at":"2026-07-05T02:03:46Z","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":"1da70c477da2adff385c9a348d346ae383ae796f72bd022530aceacbd73193af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-29T18:11:32Z","title_canon_sha256":"869388fbd1af0a57ea2d03ada0dd8616a5cdc5976bddaec259ce5bbb97decf57"},"schema_version":"1.0","source":{"id":"2009.14238","kind":"arxiv","version":1}},"canonical_sha256":"e409aded18b181f9943add0013c8834afadfde33958af39cd1e83ae1cc76ad79","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e409aded18b181f9943add0013c8834afadfde33958af39cd1e83ae1cc76ad79","first_computed_at":"2026-07-05T02:03:46.982153Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:03:46.982153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LibZUDUKIMDcHyvafyGLQox81mo5yd2UD5gMLBw9C7E/s74nifszHm2c09p5PgSlwNV9WGSWN7D+HAmGU9bECw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:03:46.982582Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.14238","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6e4ee7194e663b122c21c60e7b95b171d345ea83ad60f800e9455f81d4ca691","sha256:d4eea9dcf50c92e64642d2df3b71e71ce24380b0c5de9fde250f6178c3d18de5"],"state_sha256":"9fbc8737baa6f128b1e126cb8b98ca5e6ad7b7e1e3a3cb0b8754e9f4ed8eed05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XNwjQOsqVRLhCboZE0RqaN9sTmQ7QABPFM6BQ/rh+pRFa4h5UAiMnqjrL4MROHfn4IdPIPJDe+ZeWVL3RrQTAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T20:58:19.019227Z","bundle_sha256":"8c74de4efc7db03a56600da96460228451b39bf465c60f94892e08d5d5835fcc"}}