{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:GIGWCT4JILIDZG7LMGISL62D2W","short_pith_number":"pith:GIGWCT4J","canonical_record":{"source":{"id":"1802.00830","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-02T19:54:28Z","cross_cats_sorted":[],"title_canon_sha256":"5508cfdbac93645a8263da7fffc1028a0d2c942f8c6f7baf948cfaed9fca13e1","abstract_canon_sha256":"dbe4b4660c80600b306f9c60b1a770086ed9e793e7c84767ef362133f0815d4a"},"schema_version":"1.0"},"canonical_sha256":"320d614f8942d03c9beb619125fb43d58500310a9bc7cf268e288ffe7bcf65ee","source":{"kind":"arxiv","id":"1802.00830","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00830","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00830v1","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00830","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"pith_short_12","alias_value":"GIGWCT4JILID","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GIGWCT4JILIDZG7L","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GIGWCT4J","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:GIGWCT4JILIDZG7LMGISL62D2W","target":"record","payload":{"canonical_record":{"source":{"id":"1802.00830","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-02T19:54:28Z","cross_cats_sorted":[],"title_canon_sha256":"5508cfdbac93645a8263da7fffc1028a0d2c942f8c6f7baf948cfaed9fca13e1","abstract_canon_sha256":"dbe4b4660c80600b306f9c60b1a770086ed9e793e7c84767ef362133f0815d4a"},"schema_version":"1.0"},"canonical_sha256":"320d614f8942d03c9beb619125fb43d58500310a9bc7cf268e288ffe7bcf65ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:28.109164Z","signature_b64":"gNJVfcxzyDW+/6qpUbPZ/i0Qj+NIUIUA//V9yryQxa9Zfo5q7V/gTeu3Z/5+MPLHFyWk09KrCjiCgqKnj/OcAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"320d614f8942d03c9beb619125fb43d58500310a9bc7cf268e288ffe7bcf65ee","last_reissued_at":"2026-05-18T00:24:28.108645Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:28.108645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.00830","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":"2026-05-18T00:24:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ijW8mjOfMUcBC9rcwNFnW9AQavl2WY5PTWQd4Yh/xQqud6a+8lwWUftFOr1cBKpwgRzVomG6mIfAPj0R6YxyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T11:29:53.356314Z"},"content_sha256":"1a4de047fd1b7e456f8cb09d511f009eab25b88464f9d52d3397f5de1cce6007","schema_version":"1.0","event_id":"sha256:1a4de047fd1b7e456f8cb09d511f009eab25b88464f9d52d3397f5de1cce6007"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:GIGWCT4JILIDZG7LMGISL62D2W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral Evidence for Amorphous Silicates in Least-processed CO Meteorites and Their Parent Bodies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Conel M. O'D Alexander, Jessica M. Sunshine, Kieren T. Howard, Margaret M. McAdam, Schelte J. Bus, Timothy J. McCoy","submitted_at":"2018-02-02T19:54:28Z","abstract_excerpt":"Least-processed carbonaceous chondrites (carbonaceous chondrites that have experienced minimal aqueous alteration and thermal metamorphism) are characterized by their predominately amorphous iron-rich silicate interchondrule matrices and chondrule rims. The presence of abundant amorphous material in a meteorite indicates that the parent body, or at least a region of the parent body, experienced minimal processing since the time of accretion. The CO chemical group of carbonaceous chondrites has a significant number of these least-processed samples. We present visible/near-infrared and mid-infra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00830","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":"2026-05-18T00:24:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NvgdLpTlNctYdrBuVt1Q9cNXaZb+1zutBM/mPWyd8orsHQvrlih/yMdsLTHMDAjALvNr2tXND49nFZL39mQ2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T11:29:53.356761Z"},"content_sha256":"16794580590512e2ac7100f9dcabbabedeb84be4ced0179ffdae898127e5a9e5","schema_version":"1.0","event_id":"sha256:16794580590512e2ac7100f9dcabbabedeb84be4ced0179ffdae898127e5a9e5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIGWCT4JILIDZG7LMGISL62D2W/bundle.json","state_url":"https://pith.science/pith/GIGWCT4JILIDZG7LMGISL62D2W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIGWCT4JILIDZG7LMGISL62D2W/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":"2026-08-14T11:29:53Z","links":{"resolver":"https://pith.science/pith/GIGWCT4JILIDZG7LMGISL62D2W","bundle":"https://pith.science/pith/GIGWCT4JILIDZG7LMGISL62D2W/bundle.json","state":"https://pith.science/pith/GIGWCT4JILIDZG7LMGISL62D2W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIGWCT4JILIDZG7LMGISL62D2W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GIGWCT4JILIDZG7LMGISL62D2W","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":"dbe4b4660c80600b306f9c60b1a770086ed9e793e7c84767ef362133f0815d4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-02T19:54:28Z","title_canon_sha256":"5508cfdbac93645a8263da7fffc1028a0d2c942f8c6f7baf948cfaed9fca13e1"},"schema_version":"1.0","source":{"id":"1802.00830","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00830","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00830v1","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00830","created_at":"2026-05-18T00:24:28Z"},{"alias_kind":"pith_short_12","alias_value":"GIGWCT4JILID","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GIGWCT4JILIDZG7L","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GIGWCT4J","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:16794580590512e2ac7100f9dcabbabedeb84be4ced0179ffdae898127e5a9e5","target":"graph","created_at":"2026-05-18T00:24:28Z","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":"Least-processed carbonaceous chondrites (carbonaceous chondrites that have experienced minimal aqueous alteration and thermal metamorphism) are characterized by their predominately amorphous iron-rich silicate interchondrule matrices and chondrule rims. The presence of abundant amorphous material in a meteorite indicates that the parent body, or at least a region of the parent body, experienced minimal processing since the time of accretion. The CO chemical group of carbonaceous chondrites has a significant number of these least-processed samples. We present visible/near-infrared and mid-infra","authors_text":"Conel M. O'D Alexander, Jessica M. Sunshine, Kieren T. Howard, Margaret M. McAdam, Schelte J. Bus, Timothy J. McCoy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-02T19:54:28Z","title":"Spectral Evidence for Amorphous Silicates in Least-processed CO Meteorites and Their Parent Bodies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00830","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":"sha256:1a4de047fd1b7e456f8cb09d511f009eab25b88464f9d52d3397f5de1cce6007","target":"record","created_at":"2026-05-18T00:24:28Z","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":"dbe4b4660c80600b306f9c60b1a770086ed9e793e7c84767ef362133f0815d4a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-02T19:54:28Z","title_canon_sha256":"5508cfdbac93645a8263da7fffc1028a0d2c942f8c6f7baf948cfaed9fca13e1"},"schema_version":"1.0","source":{"id":"1802.00830","kind":"arxiv","version":1}},"canonical_sha256":"320d614f8942d03c9beb619125fb43d58500310a9bc7cf268e288ffe7bcf65ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"320d614f8942d03c9beb619125fb43d58500310a9bc7cf268e288ffe7bcf65ee","first_computed_at":"2026-05-18T00:24:28.108645Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:28.108645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gNJVfcxzyDW+/6qpUbPZ/i0Qj+NIUIUA//V9yryQxa9Zfo5q7V/gTeu3Z/5+MPLHFyWk09KrCjiCgqKnj/OcAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:28.109164Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.00830","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a4de047fd1b7e456f8cb09d511f009eab25b88464f9d52d3397f5de1cce6007","sha256:16794580590512e2ac7100f9dcabbabedeb84be4ced0179ffdae898127e5a9e5"],"state_sha256":"0d2975f116ff48d69990cbcf16af194f8e0bd12bcf12192eeaaf7de83544be12"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Okd7VP7YFigO759Gb8pIUkY3fkr70lMWkzsEJe3YQRZNno2FtMiOwP3Kl1tqs1D8eJT6eg5mJ1VB2TjWCzcAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T11:29:53.361071Z","bundle_sha256":"9527ccf19f8298db0672bc249d89ecb4b26de857555e5b3cba504267e0ec2ee6"}}