{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:AJOBCP2UAUTCS6ZMZVD2OLSDDJ","short_pith_number":"pith:AJOBCP2U","canonical_record":{"source":{"id":"1101.4949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-01-25T21:06:24Z","cross_cats_sorted":[],"title_canon_sha256":"abce19aa984cc4a4e7bc468f245327f17f4c381f89a9bcd8184a3b2d6e8b62e8","abstract_canon_sha256":"3b1b4f9cb9b203a31d1180224da4671b3fe4ac1e1ab2ce57ea0b5c229eaf3c5c"},"schema_version":"1.0"},"canonical_sha256":"025c113f540526297b2ccd47a72e431a48d192343e3016d4d50ae8c1998c9fd0","source":{"kind":"arxiv","id":"1101.4949","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4949","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4949v1","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4949","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"pith_short_12","alias_value":"AJOBCP2UAUTC","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"AJOBCP2UAUTCS6ZM","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"AJOBCP2U","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:AJOBCP2UAUTCS6ZMZVD2OLSDDJ","target":"record","payload":{"canonical_record":{"source":{"id":"1101.4949","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-01-25T21:06:24Z","cross_cats_sorted":[],"title_canon_sha256":"abce19aa984cc4a4e7bc468f245327f17f4c381f89a9bcd8184a3b2d6e8b62e8","abstract_canon_sha256":"3b1b4f9cb9b203a31d1180224da4671b3fe4ac1e1ab2ce57ea0b5c229eaf3c5c"},"schema_version":"1.0"},"canonical_sha256":"025c113f540526297b2ccd47a72e431a48d192343e3016d4d50ae8c1998c9fd0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:30:47.116161Z","signature_b64":"rnDSNsP2rhsgy7rFJD8FU/IdDNRVH9C9S0u1wC2yb6seomls1W2Kx4S5WEuOJOWA9FpcsfYw9rkXUJg/4DdbAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"025c113f540526297b2ccd47a72e431a48d192343e3016d4d50ae8c1998c9fd0","last_reissued_at":"2026-05-18T04:30:47.115440Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:30:47.115440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.4949","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":"2026-05-18T04:30:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g67iKVw6RCgr6jFiTaHPyQ63iONkhvNbs5V1EcivO55AXH1bDzOYwftY4H3t4Yg3jR10aRTjVyQFTH08o/fsAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:19:00.023928Z"},"content_sha256":"835ca2c5ace005b8774f8e16bad4931f053de637797b6b1349032e196d700987","schema_version":"1.0","event_id":"sha256:835ca2c5ace005b8774f8e16bad4931f053de637797b6b1349032e196d700987"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:AJOBCP2UAUTCS6ZMZVD2OLSDDJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extreme 54Cr-rich nano-oxides in the CI chondrite Orgueil -Implication for a late supernova injection into the Solar System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Conel M. O'D. Alexander, Frank J. Stadermann, Jianhua Wang, Larry R. Nittler, Liping Qin, Richard W. Carlson","submitted_at":"2011-01-25T21:06:24Z","abstract_excerpt":"Systematic variations in 54Cr/52Cr ratios between meteorite classes (Qin et al., 2010a; Trinquier et al., 2007) point to large scale spatial and/or temporal isotopic heterogeneity in the solar protoplanetary disk. Two explanations for these variations have been proposed, with important implications for the formation of the Solar System: heterogeneous seeding of the disk with dust from a supernova, or energetic-particle irradiation of dust in the disk. The key to differentiating between them is identification of the carrier(s) of the 54Cr anomalies. Here we report the results of our recent Nano"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4949","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":"2026-05-18T04:30:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9mZhcMV/i7hjuNmQBA4ghOvjx5Vzd7EyilLzOIrYZuETe0EKeGNXmeL/DMlu64/4JCRZ+WV+dduDZDeme+3QAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:19:00.024645Z"},"content_sha256":"62fac704732799e97781cb8ed675bdb92d5c0b7f47bd383b9786215a822511bd","schema_version":"1.0","event_id":"sha256:62fac704732799e97781cb8ed675bdb92d5c0b7f47bd383b9786215a822511bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/bundle.json","state_url":"https://pith.science/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/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":"2026-05-30T09:19:00Z","links":{"resolver":"https://pith.science/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ","bundle":"https://pith.science/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/bundle.json","state":"https://pith.science/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJOBCP2UAUTCS6ZMZVD2OLSDDJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:AJOBCP2UAUTCS6ZMZVD2OLSDDJ","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":"3b1b4f9cb9b203a31d1180224da4671b3fe4ac1e1ab2ce57ea0b5c229eaf3c5c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-01-25T21:06:24Z","title_canon_sha256":"abce19aa984cc4a4e7bc468f245327f17f4c381f89a9bcd8184a3b2d6e8b62e8"},"schema_version":"1.0","source":{"id":"1101.4949","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4949","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4949v1","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4949","created_at":"2026-05-18T04:30:47Z"},{"alias_kind":"pith_short_12","alias_value":"AJOBCP2UAUTC","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"AJOBCP2UAUTCS6ZM","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"AJOBCP2U","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:62fac704732799e97781cb8ed675bdb92d5c0b7f47bd383b9786215a822511bd","target":"graph","created_at":"2026-05-18T04:30:47Z","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":"Systematic variations in 54Cr/52Cr ratios between meteorite classes (Qin et al., 2010a; Trinquier et al., 2007) point to large scale spatial and/or temporal isotopic heterogeneity in the solar protoplanetary disk. Two explanations for these variations have been proposed, with important implications for the formation of the Solar System: heterogeneous seeding of the disk with dust from a supernova, or energetic-particle irradiation of dust in the disk. The key to differentiating between them is identification of the carrier(s) of the 54Cr anomalies. Here we report the results of our recent Nano","authors_text":"Conel M. O'D. Alexander, Frank J. Stadermann, Jianhua Wang, Larry R. Nittler, Liping Qin, Richard W. Carlson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-01-25T21:06:24Z","title":"Extreme 54Cr-rich nano-oxides in the CI chondrite Orgueil -Implication for a late supernova injection into the Solar System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4949","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":"sha256:835ca2c5ace005b8774f8e16bad4931f053de637797b6b1349032e196d700987","target":"record","created_at":"2026-05-18T04:30:47Z","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":"3b1b4f9cb9b203a31d1180224da4671b3fe4ac1e1ab2ce57ea0b5c229eaf3c5c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-01-25T21:06:24Z","title_canon_sha256":"abce19aa984cc4a4e7bc468f245327f17f4c381f89a9bcd8184a3b2d6e8b62e8"},"schema_version":"1.0","source":{"id":"1101.4949","kind":"arxiv","version":1}},"canonical_sha256":"025c113f540526297b2ccd47a72e431a48d192343e3016d4d50ae8c1998c9fd0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"025c113f540526297b2ccd47a72e431a48d192343e3016d4d50ae8c1998c9fd0","first_computed_at":"2026-05-18T04:30:47.115440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:30:47.115440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rnDSNsP2rhsgy7rFJD8FU/IdDNRVH9C9S0u1wC2yb6seomls1W2Kx4S5WEuOJOWA9FpcsfYw9rkXUJg/4DdbAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:30:47.116161Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.4949","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:835ca2c5ace005b8774f8e16bad4931f053de637797b6b1349032e196d700987","sha256:62fac704732799e97781cb8ed675bdb92d5c0b7f47bd383b9786215a822511bd"],"state_sha256":"af1742f8423e08f3e0d52eb57ab9b2aea548295783bd356fbdcf88856c6254b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J0VHXKCM0r037vcYc9ja71XQ0vxZzUj1dpcaClOUEs9XxUG2MM4/9x0oSadyva2B+E1i1f3qy7JAldc66OatCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:19:00.029044Z","bundle_sha256":"fe0f22ae9bea5b35d100f610291e870efd2b782604c33d110484be76aa282758"}}