{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:WD5Z6J427EWR2GX6HVVCEGEVJ2","short_pith_number":"pith:WD5Z6J42","canonical_record":{"source":{"id":"1908.09685","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-26T13:49:30Z","cross_cats_sorted":[],"title_canon_sha256":"85e1d2ae81aee1f544183e05ad0a088420bee2d0df1f9f0acc3bb10993b75cb6","abstract_canon_sha256":"9590939d6fedcb38ed656edee36b9eeb3597f63f9e8ce45ef2f9bc01e7a4272c"},"schema_version":"1.0"},"canonical_sha256":"b0fb9f279af92d1d1afe3d6a2218954e953049c3a8d26e6a55f0a2db7e3ffa99","source":{"kind":"arxiv","id":"1908.09685","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09685","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09685v1","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09685","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_12","alias_value":"WD5Z6J427EWR","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_16","alias_value":"WD5Z6J427EWR2GX6","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_8","alias_value":"WD5Z6J42","created_at":"2026-07-05T00:17:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:WD5Z6J427EWR2GX6HVVCEGEVJ2","target":"record","payload":{"canonical_record":{"source":{"id":"1908.09685","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-26T13:49:30Z","cross_cats_sorted":[],"title_canon_sha256":"85e1d2ae81aee1f544183e05ad0a088420bee2d0df1f9f0acc3bb10993b75cb6","abstract_canon_sha256":"9590939d6fedcb38ed656edee36b9eeb3597f63f9e8ce45ef2f9bc01e7a4272c"},"schema_version":"1.0"},"canonical_sha256":"b0fb9f279af92d1d1afe3d6a2218954e953049c3a8d26e6a55f0a2db7e3ffa99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:17:12.261535Z","signature_b64":"vGQgPbMhO71Z/VzdTbny7PCfTmrlAsxudCeU3D2OBv/c5mzB8vWQ2k1sGO9ibb5qMsTObylbs/7hJAH9SXS/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0fb9f279af92d1d1afe3d6a2218954e953049c3a8d26e6a55f0a2db7e3ffa99","last_reissued_at":"2026-07-05T00:17:12.261084Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:17:12.261084Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.09685","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":"2026-07-05T00:17:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xNKFR3ks+tNADeAR5mNGGXfTZInWeF5SYKkKMoR9oHi3eE6FuMWfpcQxRD0SbR6Q7hpPUf8vho3TDUthKY6OBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:40:09.467652Z"},"content_sha256":"d9832d020f1ef8edc3c2134ef0128ba8ecc6e30ff2b25b1b9c1cf05d48737603","schema_version":"1.0","event_id":"sha256:d9832d020f1ef8edc3c2134ef0128ba8ecc6e30ff2b25b1b9c1cf05d48737603"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:WD5Z6J427EWR2GX6HVVCEGEVJ2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New millimeter CO observations of the gas-rich debris disks 49 Cet and HD 32297","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"\\'Agnes K\\'osp\\'al, A. Meredith Hughes, Anne Dutrey, Attila Juh\\'asz, Attila Mo\\'or, Emmanuel Di Folco, Ilaria Pascucci, Nicole Pawellek, P\\'eter \\'Abrah\\'am, Quentin Kral","submitted_at":"2019-08-26T13:49:30Z","abstract_excerpt":"Previous observations revealed the existence of CO gas at nearly protoplanetary level in several dust-rich debris disks around young A-type stars. Here we used the ALMA 7m-array to measure $^{13}$CO and C$^{18}$O emission toward two debris disks, 49 Cet and HD 32297, and detected similarly high CO content ($>$0.01M$_\\oplus$). These high CO masses imply a highly efficient shielding of CO molecules against stellar and interstellar ultraviolet photons. Adapting a recent secondary gas disk model that considers both shielding by carbon atoms and self-shielding of CO, we can explain the observed CO "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09685","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/1908.09685/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":"2026-07-05T00:17:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f/PC57x1XKZWhPmhxbokbVmhxruFIZIAUnG5bHsmk6jIVofUD6OwIvuAuKyioW7A+qedP9hxIDFctgooExiXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:40:09.468154Z"},"content_sha256":"032e1a0c1946bfcb3a07129cd146756201d18c4261aa4402c303cfb27ad6fa7b","schema_version":"1.0","event_id":"sha256:032e1a0c1946bfcb3a07129cd146756201d18c4261aa4402c303cfb27ad6fa7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/bundle.json","state_url":"https://pith.science/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/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":"2026-08-16T07:40:09Z","links":{"resolver":"https://pith.science/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2","bundle":"https://pith.science/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/bundle.json","state":"https://pith.science/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WD5Z6J427EWR2GX6HVVCEGEVJ2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:WD5Z6J427EWR2GX6HVVCEGEVJ2","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":"9590939d6fedcb38ed656edee36b9eeb3597f63f9e8ce45ef2f9bc01e7a4272c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-26T13:49:30Z","title_canon_sha256":"85e1d2ae81aee1f544183e05ad0a088420bee2d0df1f9f0acc3bb10993b75cb6"},"schema_version":"1.0","source":{"id":"1908.09685","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09685","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09685v1","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09685","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_12","alias_value":"WD5Z6J427EWR","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_16","alias_value":"WD5Z6J427EWR2GX6","created_at":"2026-07-05T00:17:12Z"},{"alias_kind":"pith_short_8","alias_value":"WD5Z6J42","created_at":"2026-07-05T00:17:12Z"}],"graph_snapshots":[{"event_id":"sha256:032e1a0c1946bfcb3a07129cd146756201d18c4261aa4402c303cfb27ad6fa7b","target":"graph","created_at":"2026-07-05T00:17:12Z","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/1908.09685/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Previous observations revealed the existence of CO gas at nearly protoplanetary level in several dust-rich debris disks around young A-type stars. Here we used the ALMA 7m-array to measure $^{13}$CO and C$^{18}$O emission toward two debris disks, 49 Cet and HD 32297, and detected similarly high CO content ($>$0.01M$_\\oplus$). These high CO masses imply a highly efficient shielding of CO molecules against stellar and interstellar ultraviolet photons. Adapting a recent secondary gas disk model that considers both shielding by carbon atoms and self-shielding of CO, we can explain the observed CO ","authors_text":"\\'Agnes K\\'osp\\'al, A. Meredith Hughes, Anne Dutrey, Attila Juh\\'asz, Attila Mo\\'or, Emmanuel Di Folco, Ilaria Pascucci, Nicole Pawellek, P\\'eter \\'Abrah\\'am, Quentin Kral","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-26T13:49:30Z","title":"New millimeter CO observations of the gas-rich debris disks 49 Cet and HD 32297"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09685","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:d9832d020f1ef8edc3c2134ef0128ba8ecc6e30ff2b25b1b9c1cf05d48737603","target":"record","created_at":"2026-07-05T00:17:12Z","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":"9590939d6fedcb38ed656edee36b9eeb3597f63f9e8ce45ef2f9bc01e7a4272c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-26T13:49:30Z","title_canon_sha256":"85e1d2ae81aee1f544183e05ad0a088420bee2d0df1f9f0acc3bb10993b75cb6"},"schema_version":"1.0","source":{"id":"1908.09685","kind":"arxiv","version":1}},"canonical_sha256":"b0fb9f279af92d1d1afe3d6a2218954e953049c3a8d26e6a55f0a2db7e3ffa99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0fb9f279af92d1d1afe3d6a2218954e953049c3a8d26e6a55f0a2db7e3ffa99","first_computed_at":"2026-07-05T00:17:12.261084Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:17:12.261084Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vGQgPbMhO71Z/VzdTbny7PCfTmrlAsxudCeU3D2OBv/c5mzB8vWQ2k1sGO9ibb5qMsTObylbs/7hJAH9SXS/Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:17:12.261535Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.09685","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9832d020f1ef8edc3c2134ef0128ba8ecc6e30ff2b25b1b9c1cf05d48737603","sha256:032e1a0c1946bfcb3a07129cd146756201d18c4261aa4402c303cfb27ad6fa7b"],"state_sha256":"cc7d00cc068bfc89654ee4ef6a27446567cf210523005cba10f18fa258574e05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z2MOBELpQZ9ZieA0s9fkGq/yqwsNDepmdGRVb/Ov8iw3qpn0u21SnRiyosa1GOLFCtpUQLuR9v9/UYe8H3NyAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T07:40:09.471665Z","bundle_sha256":"056ff88210cb516db7f6b150b2eade45d7fd3ada739fb68eed50bdba61799666"}}