{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:TKWHHF7PRW3P2WN4QW7OCIJ24E","short_pith_number":"pith:TKWHHF7P","canonical_record":{"source":{"id":"1906.02380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-06T01:53:29Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"57b4d37757632d1a6a496f59b2f1dbd189b2e6c37ae364f4aeb22560cc0f2421","abstract_canon_sha256":"ee173e8c822f37cd4dda71884ee212ea43e566c4faee2c16d9149187aa62eafb"},"schema_version":"1.0"},"canonical_sha256":"9aac7397ef8db6fd59bc85bee1213ae1152b2354cd2dbb500bd99de8187007b6","source":{"kind":"arxiv","id":"1906.02380","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.02380","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"arxiv_version","alias_value":"1906.02380v1","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.02380","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"pith_short_12","alias_value":"TKWHHF7PRW3P","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TKWHHF7PRW3P2WN4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TKWHHF7P","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:TKWHHF7PRW3P2WN4QW7OCIJ24E","target":"record","payload":{"canonical_record":{"source":{"id":"1906.02380","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-06T01:53:29Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"57b4d37757632d1a6a496f59b2f1dbd189b2e6c37ae364f4aeb22560cc0f2421","abstract_canon_sha256":"ee173e8c822f37cd4dda71884ee212ea43e566c4faee2c16d9149187aa62eafb"},"schema_version":"1.0"},"canonical_sha256":"9aac7397ef8db6fd59bc85bee1213ae1152b2354cd2dbb500bd99de8187007b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:01.392663Z","signature_b64":"fQh7SlYJxKYHC2l2zFcvSvtEGDlRxce3YfYB/OTeAED9qfUTFTLofq+V/K9ldilzc8eoh8QxqgTOVHvvSLS1CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9aac7397ef8db6fd59bc85bee1213ae1152b2354cd2dbb500bd99de8187007b6","last_reissued_at":"2026-05-17T23:44:01.392092Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:01.392092Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.02380","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":"2026-05-17T23:44:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uknh6jNblXQL4rDkrdcW/u+3/s81pD4Hg4ktL0gOpcy5A9MfvMO786K+ft3N7fnVFQH9gNUTD21qb/OnzI2qCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:49:23.436105Z"},"content_sha256":"89d9ad4db6c10f65f740f0480f482893c18cce6c14daa8567b30f1c17f319933","schema_version":"1.0","event_id":"sha256:89d9ad4db6c10f65f740f0480f482893c18cce6c14daa8567b30f1c17f319933"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:TKWHHF7PRW3P2WN4QW7OCIJ24E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SOFIA Far-infrared [O III] and [O I] Observations of Dense CO-knots in the Supernova Remnant Cassiopeia A: Multi-phase Ejecta","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alexander Tielens, Dario Fadda, Isabelle Cherchneff, Jeonghee Rho, John Black, Olivier Berne, Sebastien Muller, Sofia Wallstrom","submitted_at":"2019-06-06T01:53:29Z","abstract_excerpt":"Dense, fast-moving ejecta knots in supernova remnants are prime sites for molecule and dust formation. We present SOFIA far-IR spectrometer FIFI-LS observations of CO-rich knots in Cas A which cover a ~1 square arc minute area of the northern shell, in the [O III] 52 and 88 micron and [O I] 63 micron lines. The FIFI-LS spectra reveal that the line profiles of [O III] and [O I] are similar to those of the Herschel PACS [O III] and CO lines. We find that the [O III] maps show very different morphology than the [O I] map. The [O III] maps reveal diffuse, large-scale structures and the ratio of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.02380","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":"2026-05-17T23:44:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gp+dKVosjaqvjrHEENZ+DWQ9FU4xZAHJmrZdXvkSdi30CI5FfQW7rbhj88U+/XmtBf7Mkptg6qS61ukQ6hebDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:49:23.436836Z"},"content_sha256":"6d8b04d1a35a0c8a5a21c5b10cf2045ade6a5b2c38807ef51364c48f6c4e79b6","schema_version":"1.0","event_id":"sha256:6d8b04d1a35a0c8a5a21c5b10cf2045ade6a5b2c38807ef51364c48f6c4e79b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/bundle.json","state_url":"https://pith.science/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/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":"2026-05-31T19:49:23Z","links":{"resolver":"https://pith.science/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E","bundle":"https://pith.science/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/bundle.json","state":"https://pith.science/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TKWHHF7PRW3P2WN4QW7OCIJ24E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TKWHHF7PRW3P2WN4QW7OCIJ24E","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":"ee173e8c822f37cd4dda71884ee212ea43e566c4faee2c16d9149187aa62eafb","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-06T01:53:29Z","title_canon_sha256":"57b4d37757632d1a6a496f59b2f1dbd189b2e6c37ae364f4aeb22560cc0f2421"},"schema_version":"1.0","source":{"id":"1906.02380","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.02380","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"arxiv_version","alias_value":"1906.02380v1","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.02380","created_at":"2026-05-17T23:44:01Z"},{"alias_kind":"pith_short_12","alias_value":"TKWHHF7PRW3P","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TKWHHF7PRW3P2WN4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TKWHHF7P","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:6d8b04d1a35a0c8a5a21c5b10cf2045ade6a5b2c38807ef51364c48f6c4e79b6","target":"graph","created_at":"2026-05-17T23:44:01Z","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":"Dense, fast-moving ejecta knots in supernova remnants are prime sites for molecule and dust formation. We present SOFIA far-IR spectrometer FIFI-LS observations of CO-rich knots in Cas A which cover a ~1 square arc minute area of the northern shell, in the [O III] 52 and 88 micron and [O I] 63 micron lines. The FIFI-LS spectra reveal that the line profiles of [O III] and [O I] are similar to those of the Herschel PACS [O III] and CO lines. We find that the [O III] maps show very different morphology than the [O I] map. The [O III] maps reveal diffuse, large-scale structures and the ratio of th","authors_text":"Alexander Tielens, Dario Fadda, Isabelle Cherchneff, Jeonghee Rho, John Black, Olivier Berne, Sebastien Muller, Sofia Wallstrom","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-06T01:53:29Z","title":"SOFIA Far-infrared [O III] and [O I] Observations of Dense CO-knots in the Supernova Remnant Cassiopeia A: Multi-phase Ejecta"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.02380","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":"sha256:89d9ad4db6c10f65f740f0480f482893c18cce6c14daa8567b30f1c17f319933","target":"record","created_at":"2026-05-17T23:44:01Z","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":"ee173e8c822f37cd4dda71884ee212ea43e566c4faee2c16d9149187aa62eafb","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-06T01:53:29Z","title_canon_sha256":"57b4d37757632d1a6a496f59b2f1dbd189b2e6c37ae364f4aeb22560cc0f2421"},"schema_version":"1.0","source":{"id":"1906.02380","kind":"arxiv","version":1}},"canonical_sha256":"9aac7397ef8db6fd59bc85bee1213ae1152b2354cd2dbb500bd99de8187007b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9aac7397ef8db6fd59bc85bee1213ae1152b2354cd2dbb500bd99de8187007b6","first_computed_at":"2026-05-17T23:44:01.392092Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:01.392092Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fQh7SlYJxKYHC2l2zFcvSvtEGDlRxce3YfYB/OTeAED9qfUTFTLofq+V/K9ldilzc8eoh8QxqgTOVHvvSLS1CA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:01.392663Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.02380","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89d9ad4db6c10f65f740f0480f482893c18cce6c14daa8567b30f1c17f319933","sha256:6d8b04d1a35a0c8a5a21c5b10cf2045ade6a5b2c38807ef51364c48f6c4e79b6"],"state_sha256":"d038b6366a2296cf0479dcdcf3cdca1507f21a2aa1c46ad02d73c27e07f4bdb8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0K7AUSQE7dswyfwwXlrxNrZMwoFJmdi8ab+HVIuc0EftnJ7VhM2T6jAZeA8o3fzarSXPsJNcUbGCEI12ql40Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T19:49:23.441041Z","bundle_sha256":"4ac35c482b1609adfc3842bc2d2eb98408fd1cfb3d7ab360077ac7dac544cf6a"}}