{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:T63C5LYD7TGA2LCBHOTA4ERIVX","short_pith_number":"pith:T63C5LYD","canonical_record":{"source":{"id":"1112.1997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-09T01:39:53Z","cross_cats_sorted":[],"title_canon_sha256":"b1827cec69b956a41d6ecc2398f74d8bde3b012a9b863ae7120e70436e1b2bd5","abstract_canon_sha256":"97b12f5edf71a3f4c91ee26a166ff0ebf49a494eb04ad7219ff1b11c89b6bba6"},"schema_version":"1.0"},"canonical_sha256":"9fb62eaf03fccc0d2c413ba60e1228add64bb5d506425f4a43ba543d52f3ec08","source":{"kind":"arxiv","id":"1112.1997","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.1997","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"arxiv_version","alias_value":"1112.1997v1","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.1997","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"pith_short_12","alias_value":"T63C5LYD7TGA","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T63C5LYD7TGA2LCB","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T63C5LYD","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:T63C5LYD7TGA2LCBHOTA4ERIVX","target":"record","payload":{"canonical_record":{"source":{"id":"1112.1997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-09T01:39:53Z","cross_cats_sorted":[],"title_canon_sha256":"b1827cec69b956a41d6ecc2398f74d8bde3b012a9b863ae7120e70436e1b2bd5","abstract_canon_sha256":"97b12f5edf71a3f4c91ee26a166ff0ebf49a494eb04ad7219ff1b11c89b6bba6"},"schema_version":"1.0"},"canonical_sha256":"9fb62eaf03fccc0d2c413ba60e1228add64bb5d506425f4a43ba543d52f3ec08","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:14.683295Z","signature_b64":"sbEJC4WZhWGmD7ZUICVgmlUPi13YavZe/IrdU/wGmwt8o84wATmAnwb4LOkMC4U0V8wSFAXWVGIcwmC2d6P0Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fb62eaf03fccc0d2c413ba60e1228add64bb5d506425f4a43ba543d52f3ec08","last_reissued_at":"2026-05-18T01:59:14.682539Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:14.682539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.1997","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":"2026-05-18T01:59:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q7fEDHQJZzBFXBWSPjuHkfCetDf2Chp/R6AvLfL04Fs9ZGMfS+8aCVxFNHI6oF+ezZt3yrZ+J/WTsCnxECHJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:21:15.590441Z"},"content_sha256":"b94c4bd77d3e789cb8e0f6fd8cb397d191ae9de98ca74a7574e1323a57ec7f93","schema_version":"1.0","event_id":"sha256:b94c4bd77d3e789cb8e0f6fd8cb397d191ae9de98ca74a7574e1323a57ec7f93"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:T63C5LYD7TGA2LCBHOTA4ERIVX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Carbon-Chain Species in Warm-up Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Eric Herbst, George E. Hassel, Nanase Harada","submitted_at":"2011-12-09T01:39:53Z","abstract_excerpt":"In previous warm-up chemical models of the low-mass star-forming region L1527, we investigated the evolution of carbon-chain unsaturated hydrocarbon species when the envelope temperature is slightly elevated to $T\\approx 30$ K. These models demonstrated that enhanced abundances of such species can be explained by gas-phase ion-molecule chemistry following the partial sublimation of methane from grain surfaces. We also concluded that the abundances of hydrocarbon radicals such as the C$_{\\rm n}$H family should be further enhanced as the temperatures increase to higher values, but this conclusio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.1997","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":"2026-05-18T01:59:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vStrcdOsaOe4BB5sDwTZrfxFuWwTDEHj+XTIjLa2AEaYHMRz8/ceRjagMz+SFw7MPXyBsHdxZHSG2rQPRqhYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:21:15.590785Z"},"content_sha256":"33d6fe323407c329d70fe96b2c04794250ae4b3bc4e183b51f7838479436d808","schema_version":"1.0","event_id":"sha256:33d6fe323407c329d70fe96b2c04794250ae4b3bc4e183b51f7838479436d808"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/bundle.json","state_url":"https://pith.science/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/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":"2026-06-09T16:21:15Z","links":{"resolver":"https://pith.science/pith/T63C5LYD7TGA2LCBHOTA4ERIVX","bundle":"https://pith.science/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/bundle.json","state":"https://pith.science/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T63C5LYD7TGA2LCBHOTA4ERIVX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:T63C5LYD7TGA2LCBHOTA4ERIVX","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":"97b12f5edf71a3f4c91ee26a166ff0ebf49a494eb04ad7219ff1b11c89b6bba6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-09T01:39:53Z","title_canon_sha256":"b1827cec69b956a41d6ecc2398f74d8bde3b012a9b863ae7120e70436e1b2bd5"},"schema_version":"1.0","source":{"id":"1112.1997","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.1997","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"arxiv_version","alias_value":"1112.1997v1","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.1997","created_at":"2026-05-18T01:59:14Z"},{"alias_kind":"pith_short_12","alias_value":"T63C5LYD7TGA","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T63C5LYD7TGA2LCB","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T63C5LYD","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:33d6fe323407c329d70fe96b2c04794250ae4b3bc4e183b51f7838479436d808","target":"graph","created_at":"2026-05-18T01:59:14Z","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":"In previous warm-up chemical models of the low-mass star-forming region L1527, we investigated the evolution of carbon-chain unsaturated hydrocarbon species when the envelope temperature is slightly elevated to $T\\approx 30$ K. These models demonstrated that enhanced abundances of such species can be explained by gas-phase ion-molecule chemistry following the partial sublimation of methane from grain surfaces. We also concluded that the abundances of hydrocarbon radicals such as the C$_{\\rm n}$H family should be further enhanced as the temperatures increase to higher values, but this conclusio","authors_text":"Eric Herbst, George E. Hassel, Nanase Harada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-09T01:39:53Z","title":"Carbon-Chain Species in Warm-up Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.1997","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:b94c4bd77d3e789cb8e0f6fd8cb397d191ae9de98ca74a7574e1323a57ec7f93","target":"record","created_at":"2026-05-18T01:59:14Z","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":"97b12f5edf71a3f4c91ee26a166ff0ebf49a494eb04ad7219ff1b11c89b6bba6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-09T01:39:53Z","title_canon_sha256":"b1827cec69b956a41d6ecc2398f74d8bde3b012a9b863ae7120e70436e1b2bd5"},"schema_version":"1.0","source":{"id":"1112.1997","kind":"arxiv","version":1}},"canonical_sha256":"9fb62eaf03fccc0d2c413ba60e1228add64bb5d506425f4a43ba543d52f3ec08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fb62eaf03fccc0d2c413ba60e1228add64bb5d506425f4a43ba543d52f3ec08","first_computed_at":"2026-05-18T01:59:14.682539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:14.682539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sbEJC4WZhWGmD7ZUICVgmlUPi13YavZe/IrdU/wGmwt8o84wATmAnwb4LOkMC4U0V8wSFAXWVGIcwmC2d6P0Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:14.683295Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.1997","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b94c4bd77d3e789cb8e0f6fd8cb397d191ae9de98ca74a7574e1323a57ec7f93","sha256:33d6fe323407c329d70fe96b2c04794250ae4b3bc4e183b51f7838479436d808"],"state_sha256":"b1bace1f059caa9009bdb132de15d54d07069eb0b7c2435978b685bc9d12a9ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NULJ/tjq38soboptyDhH+yhJooBadjnKyku9mVWYxoKZGUmN56aMud5Am5REi5to/pWDKS+/RrH7IweEWKvmBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T16:21:15.592689Z","bundle_sha256":"8946eb74319d180a33c5906e9b1a746e8ff080c0ea9e7c390539a178d9e110ef"}}