{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:SBVBHGT3YV7J6K5UBAA2ULB66V","short_pith_number":"pith:SBVBHGT3","canonical_record":{"source":{"id":"1607.06928","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2016-07-23T12:36:41Z","cross_cats_sorted":[],"title_canon_sha256":"a68683ed01b813891e6e052c8c91a000612692814cc12fff5cedd55a7f893a95","abstract_canon_sha256":"754019f0561c67b4808fe5608d8ca94962c49604fd1a260044c7fbd3626bd8eb"},"schema_version":"1.0"},"canonical_sha256":"906a139a7bc57e9f2bb40801aa2c3ef569e9247e18c006fb04f78170d4f1f4e6","source":{"kind":"arxiv","id":"1607.06928","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06928","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06928v1","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06928","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"SBVBHGT3YV7J","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SBVBHGT3YV7J6K5U","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SBVBHGT3","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:SBVBHGT3YV7J6K5UBAA2ULB66V","target":"record","payload":{"canonical_record":{"source":{"id":"1607.06928","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2016-07-23T12:36:41Z","cross_cats_sorted":[],"title_canon_sha256":"a68683ed01b813891e6e052c8c91a000612692814cc12fff5cedd55a7f893a95","abstract_canon_sha256":"754019f0561c67b4808fe5608d8ca94962c49604fd1a260044c7fbd3626bd8eb"},"schema_version":"1.0"},"canonical_sha256":"906a139a7bc57e9f2bb40801aa2c3ef569e9247e18c006fb04f78170d4f1f4e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:35.411753Z","signature_b64":"HtwLocxZuxTIAtsCT7FMKrnpgoe2e295PBq7obF904XZwOp2snxJvH/53NVwQhZcVMk719eoOPBeyK5x2pUCDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"906a139a7bc57e9f2bb40801aa2c3ef569e9247e18c006fb04f78170d4f1f4e6","last_reissued_at":"2026-05-18T01:10:35.411071Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:35.411071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.06928","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":"2026-05-18T01:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"moIuIdGZOmrPwCai/soTbd88gNNhVuX/MaHpVdcVI1uFox6DtoT/BnxHkzXmamIKH6dmdf14TSJV+VGYZA2kBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:38:52.963061Z"},"content_sha256":"b86a844cbba10ab2798ee296e18c95ce07f426b211fa4a5e75dfe50cde9716c2","schema_version":"1.0","event_id":"sha256:b86a844cbba10ab2798ee296e18c95ce07f426b211fa4a5e75dfe50cde9716c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:SBVBHGT3YV7J6K5UBAA2ULB66V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ab initio Calculations of Optical Properties of Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atm-clus","authors_text":"Ravindra Shinde","submitted_at":"2016-07-23T12:36:41Z","abstract_excerpt":"We have performed systematic large-scale all-electron correlated calculations on boron Bn, aluminum Aln and magnesium Mgn clusters (n=2--5), to study their linear optical absorption spectra. Several possible isomers of each cluster were considered, and their geometries were optimized at the coupled-cluster singles doubles (CCSD) level of theory. Using the optimized ground-state geometries, excited states of different clusters were computed using the multi-reference singles-doubles configuration interaction (MRSDCI) approach, which includes electron correlation effects at a sophisticated level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06928","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":"2026-05-18T01:10:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"seoP+4/rVGN8tfd8rmslnc5fSAhVykP5nZkThGa9DVE/KDgfGy7Ovi2Dl5Ug/pmjd4JmDnPYRrZqUU499lF2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:38:52.963423Z"},"content_sha256":"1ba4facaae18e9d6c184d3e6ecc6e1d0cf566635a181ae2d18e63dda81b58c18","schema_version":"1.0","event_id":"sha256:1ba4facaae18e9d6c184d3e6ecc6e1d0cf566635a181ae2d18e63dda81b58c18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/bundle.json","state_url":"https://pith.science/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/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":"2026-05-30T07:38:52Z","links":{"resolver":"https://pith.science/pith/SBVBHGT3YV7J6K5UBAA2ULB66V","bundle":"https://pith.science/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/bundle.json","state":"https://pith.science/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SBVBHGT3YV7J6K5UBAA2ULB66V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:SBVBHGT3YV7J6K5UBAA2ULB66V","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":"754019f0561c67b4808fe5608d8ca94962c49604fd1a260044c7fbd3626bd8eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2016-07-23T12:36:41Z","title_canon_sha256":"a68683ed01b813891e6e052c8c91a000612692814cc12fff5cedd55a7f893a95"},"schema_version":"1.0","source":{"id":"1607.06928","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06928","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06928v1","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06928","created_at":"2026-05-18T01:10:35Z"},{"alias_kind":"pith_short_12","alias_value":"SBVBHGT3YV7J","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SBVBHGT3YV7J6K5U","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SBVBHGT3","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:1ba4facaae18e9d6c184d3e6ecc6e1d0cf566635a181ae2d18e63dda81b58c18","target":"graph","created_at":"2026-05-18T01:10:35Z","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":"We have performed systematic large-scale all-electron correlated calculations on boron Bn, aluminum Aln and magnesium Mgn clusters (n=2--5), to study their linear optical absorption spectra. Several possible isomers of each cluster were considered, and their geometries were optimized at the coupled-cluster singles doubles (CCSD) level of theory. Using the optimized ground-state geometries, excited states of different clusters were computed using the multi-reference singles-doubles configuration interaction (MRSDCI) approach, which includes electron correlation effects at a sophisticated level.","authors_text":"Ravindra Shinde","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2016-07-23T12:36:41Z","title":"Ab initio Calculations of Optical Properties of Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06928","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:b86a844cbba10ab2798ee296e18c95ce07f426b211fa4a5e75dfe50cde9716c2","target":"record","created_at":"2026-05-18T01:10:35Z","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":"754019f0561c67b4808fe5608d8ca94962c49604fd1a260044c7fbd3626bd8eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2016-07-23T12:36:41Z","title_canon_sha256":"a68683ed01b813891e6e052c8c91a000612692814cc12fff5cedd55a7f893a95"},"schema_version":"1.0","source":{"id":"1607.06928","kind":"arxiv","version":1}},"canonical_sha256":"906a139a7bc57e9f2bb40801aa2c3ef569e9247e18c006fb04f78170d4f1f4e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"906a139a7bc57e9f2bb40801aa2c3ef569e9247e18c006fb04f78170d4f1f4e6","first_computed_at":"2026-05-18T01:10:35.411071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:35.411071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HtwLocxZuxTIAtsCT7FMKrnpgoe2e295PBq7obF904XZwOp2snxJvH/53NVwQhZcVMk719eoOPBeyK5x2pUCDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:35.411753Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.06928","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b86a844cbba10ab2798ee296e18c95ce07f426b211fa4a5e75dfe50cde9716c2","sha256:1ba4facaae18e9d6c184d3e6ecc6e1d0cf566635a181ae2d18e63dda81b58c18"],"state_sha256":"1a6f17f7eb15e0478d05b55198aa4e2c8ae67a7905acbda92a5aca9b1c42545c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q2iHpkKa4nLQ/j4bhLbLDV3Hm6irMvMGaHFNd+licA0zU0Oy7FoDIQ0GH2WlhNwSocpEJ0F41dO9nffo09wZAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:38:52.965512Z","bundle_sha256":"e9767963f4894e1fffbc140bb26edbc47e677aa1ab3a8f64e8f737833f942376"}}