{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5WYBYMBNMQ2BDXPE2PPJU4WCHC","short_pith_number":"pith:5WYBYMBN","canonical_record":{"source":{"id":"1501.00808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-05T10:08:34Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"5bc258d28e248d84486d46a9d9572eb70d50a523e1398dff51668b849bfeaf88","abstract_canon_sha256":"71d49d4d7942a27a593fd4be8c87dde2f8c01fd2f96b8842f2b3e7f66a502469"},"schema_version":"1.0"},"canonical_sha256":"edb01c302d643411dde4d3de9a72c2389faf72e0ef914b2b19c8ced85fe4dbdf","source":{"kind":"arxiv","id":"1501.00808","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00808","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00808v1","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00808","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"5WYBYMBNMQ2B","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"5WYBYMBNMQ2BDXPE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"5WYBYMBN","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5WYBYMBNMQ2BDXPE2PPJU4WCHC","target":"record","payload":{"canonical_record":{"source":{"id":"1501.00808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-05T10:08:34Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"5bc258d28e248d84486d46a9d9572eb70d50a523e1398dff51668b849bfeaf88","abstract_canon_sha256":"71d49d4d7942a27a593fd4be8c87dde2f8c01fd2f96b8842f2b3e7f66a502469"},"schema_version":"1.0"},"canonical_sha256":"edb01c302d643411dde4d3de9a72c2389faf72e0ef914b2b19c8ced85fe4dbdf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:14.625131Z","signature_b64":"ozOJoloAQ4Ku9/ye20zGZ+W/Kk37qixb+RSEoaqmSwuJfSBG81NhEA5nnMCpZSh/0jebvrwaIi9R1KucSNzeAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"edb01c302d643411dde4d3de9a72c2389faf72e0ef914b2b19c8ced85fe4dbdf","last_reissued_at":"2026-05-18T01:41:14.624680Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:14.624680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.00808","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":"2026-05-18T01:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qy4eUEp3Irz8XYVb9Sfm17nUvKN8tAQYzbV1A/lOHlF4mCkm7v+CQzwiJkfq/v45S4nYlLZBgmwBcRx1FJhKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T04:17:26.119854Z"},"content_sha256":"8e4632164a3427c33ffee9297ad7bf6997c174dd80ba87e6ba06ef5023c41490","schema_version":"1.0","event_id":"sha256:8e4632164a3427c33ffee9297ad7bf6997c174dd80ba87e6ba06ef5023c41490"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5WYBYMBNMQ2BDXPE2PPJU4WCHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electron impact excitation of Be-like ions: a comparison of DARC and ICFT results","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"astro-ph.SR","authors_text":"F. P. Keenan, K. M. Aggarwal","submitted_at":"2015-01-05T10:08:34Z","abstract_excerpt":"Emission lines of Be-like ions are frequently observed in astrophysical plasmas, and many are useful for density and temperature diagnostics. However, accurate atomic data for energy levels, radiative rates (A-values) and effective electron excitation collision strengths ($\\Upsilon$) are required for reliable plasma modelling. In general it is reasonably straightforward to calculate energy levels and A- values to a high level of accuracy. By contrast, considerable effort is required to calculate $\\Upsilon$, and hence it is not always possible to assess the accuracy of available data. Recently,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00808","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":"2026-05-18T01:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TjGHjsLPOR+BMl8HoOVuNz6V590CMMuxce1arKTsJ9LX6m+HLHzgM9i+od2yI5A+Aa6WrA2Y347tWfrihso7CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T04:17:26.120297Z"},"content_sha256":"d3fada4674fdfd5023e0b817d4c4ab7010845b91a873c72796dbfa741c2171b6","schema_version":"1.0","event_id":"sha256:d3fada4674fdfd5023e0b817d4c4ab7010845b91a873c72796dbfa741c2171b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/bundle.json","state_url":"https://pith.science/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/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":"2026-05-30T04:17:26Z","links":{"resolver":"https://pith.science/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC","bundle":"https://pith.science/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/bundle.json","state":"https://pith.science/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5WYBYMBNMQ2BDXPE2PPJU4WCHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5WYBYMBNMQ2BDXPE2PPJU4WCHC","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":"71d49d4d7942a27a593fd4be8c87dde2f8c01fd2f96b8842f2b3e7f66a502469","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-05T10:08:34Z","title_canon_sha256":"5bc258d28e248d84486d46a9d9572eb70d50a523e1398dff51668b849bfeaf88"},"schema_version":"1.0","source":{"id":"1501.00808","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00808","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00808v1","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00808","created_at":"2026-05-18T01:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"5WYBYMBNMQ2B","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"5WYBYMBNMQ2BDXPE","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"5WYBYMBN","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:d3fada4674fdfd5023e0b817d4c4ab7010845b91a873c72796dbfa741c2171b6","target":"graph","created_at":"2026-05-18T01:41:14Z","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":"Emission lines of Be-like ions are frequently observed in astrophysical plasmas, and many are useful for density and temperature diagnostics. However, accurate atomic data for energy levels, radiative rates (A-values) and effective electron excitation collision strengths ($\\Upsilon$) are required for reliable plasma modelling. In general it is reasonably straightforward to calculate energy levels and A- values to a high level of accuracy. By contrast, considerable effort is required to calculate $\\Upsilon$, and hence it is not always possible to assess the accuracy of available data. Recently,","authors_text":"F. P. Keenan, K. M. Aggarwal","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-05T10:08:34Z","title":"Electron impact excitation of Be-like ions: a comparison of DARC and ICFT results"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00808","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":"sha256:8e4632164a3427c33ffee9297ad7bf6997c174dd80ba87e6ba06ef5023c41490","target":"record","created_at":"2026-05-18T01:41:14Z","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":"71d49d4d7942a27a593fd4be8c87dde2f8c01fd2f96b8842f2b3e7f66a502469","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-01-05T10:08:34Z","title_canon_sha256":"5bc258d28e248d84486d46a9d9572eb70d50a523e1398dff51668b849bfeaf88"},"schema_version":"1.0","source":{"id":"1501.00808","kind":"arxiv","version":1}},"canonical_sha256":"edb01c302d643411dde4d3de9a72c2389faf72e0ef914b2b19c8ced85fe4dbdf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edb01c302d643411dde4d3de9a72c2389faf72e0ef914b2b19c8ced85fe4dbdf","first_computed_at":"2026-05-18T01:41:14.624680Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:14.624680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ozOJoloAQ4Ku9/ye20zGZ+W/Kk37qixb+RSEoaqmSwuJfSBG81NhEA5nnMCpZSh/0jebvrwaIi9R1KucSNzeAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:14.625131Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.00808","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e4632164a3427c33ffee9297ad7bf6997c174dd80ba87e6ba06ef5023c41490","sha256:d3fada4674fdfd5023e0b817d4c4ab7010845b91a873c72796dbfa741c2171b6"],"state_sha256":"891e6e9b0d4355695c7214d4a79d4d564c8e8e244467f17217777d68c7d0e007"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OVALntWJ2ftCQpthLn7TGklviQygNwPoKo8RcBIt40OdnceSWqfvCHpv+UtQtTIfuUkrC2zvHWq6lypl4UUcDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T04:17:26.123281Z","bundle_sha256":"8dfc67f923b22fdd49081f06cd3c65c3e284b530a8d97b8dae898b797c850b15"}}