{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2SOEZDK3CGWPKCMFA6F65PA6AN","short_pith_number":"pith:2SOEZDK3","canonical_record":{"source":{"id":"1901.10241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-01-29T12:02:51Z","cross_cats_sorted":[],"title_canon_sha256":"49fcaeb752a91033ac0faa1fdee9072a29e21acc6e89ea3afbed801786431ceb","abstract_canon_sha256":"f73bc6f5dd3b6202b8b5e008dd7bd411f994f400289114929a3616fb7e2c74f3"},"schema_version":"1.0"},"canonical_sha256":"d49c4c8d5b11acf50985078beebc1e0365120677637eef1fe74e6e4c0b6dffc9","source":{"kind":"arxiv","id":"1901.10241","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.10241","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"arxiv_version","alias_value":"1901.10241v1","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.10241","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"pith_short_12","alias_value":"2SOEZDK3CGWP","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2SOEZDK3CGWPKCMF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2SOEZDK3","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2SOEZDK3CGWPKCMFA6F65PA6AN","target":"record","payload":{"canonical_record":{"source":{"id":"1901.10241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-01-29T12:02:51Z","cross_cats_sorted":[],"title_canon_sha256":"49fcaeb752a91033ac0faa1fdee9072a29e21acc6e89ea3afbed801786431ceb","abstract_canon_sha256":"f73bc6f5dd3b6202b8b5e008dd7bd411f994f400289114929a3616fb7e2c74f3"},"schema_version":"1.0"},"canonical_sha256":"d49c4c8d5b11acf50985078beebc1e0365120677637eef1fe74e6e4c0b6dffc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:15.769517Z","signature_b64":"POPnZnQk5xt3GZs49Sb4orVt/gMHJpCRcGa3uHnikoikhW4+MzzngXh3UhH+xaylCTTZnNNzcE/+t37mx3pECA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d49c4c8d5b11acf50985078beebc1e0365120677637eef1fe74e6e4c0b6dffc9","last_reissued_at":"2026-05-17T23:55:15.769027Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:15.769027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.10241","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":"2026-05-17T23:55:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EigasK892IZr8g3bsecuBKa5i5+bFSRy/Cvki4ndEnCNZrzoBZOx/DN5BH4DjU++GW1WBr8hXGkSDY0Fmt9JDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T22:52:23.700020Z"},"content_sha256":"9b0d2c1a0c2a40110ecf3d32f357efa216256072bf1202a9ded6f7b400ddb838","schema_version":"1.0","event_id":"sha256:9b0d2c1a0c2a40110ecf3d32f357efa216256072bf1202a9ded6f7b400ddb838"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2SOEZDK3CGWPKCMFA6F65PA6AN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structure of the Balmer jump. The isolated hydrogen atom","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Flavio Calvo, Luca Belluzzi, Oskar Steiner","submitted_at":"2019-01-29T12:02:51Z","abstract_excerpt":"Context. The spectrum of the hydrogen atom was explained by Bohr more than one century ago. We revisit here some of the aspects of the underlying quantum structure, with a modern formalism, focusing on the limit of the Balmer series.\n  Aims. We investigate the behaviour of the absorption coefficient of the isolated hydrogen atom in the neighbourhood of the Balmer limit.\n  Methods. We analytically computed the total cross-section arising from bound-bound and bound-free transitions in the isolated hydrogen atom at the Balmer limit, and established a simplified semi-analytical model for the surro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.10241","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":"2026-05-17T23:55:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aZzNDmbgDVIiXHcJ7cio7OjXxRCxFIX13nvPf2T/xl77zmfp9RUozfM2c6E4rGXrGT8JradiKrsQHe45c6jyBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T22:52:23.700708Z"},"content_sha256":"d9e633fa72944f59b4841ebd45688432332bff8c2f515b04f96750c158aba0ec","schema_version":"1.0","event_id":"sha256:d9e633fa72944f59b4841ebd45688432332bff8c2f515b04f96750c158aba0ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/bundle.json","state_url":"https://pith.science/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/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":"2026-06-07T22:52:23Z","links":{"resolver":"https://pith.science/pith/2SOEZDK3CGWPKCMFA6F65PA6AN","bundle":"https://pith.science/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/bundle.json","state":"https://pith.science/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2SOEZDK3CGWPKCMFA6F65PA6AN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2SOEZDK3CGWPKCMFA6F65PA6AN","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":"f73bc6f5dd3b6202b8b5e008dd7bd411f994f400289114929a3616fb7e2c74f3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-01-29T12:02:51Z","title_canon_sha256":"49fcaeb752a91033ac0faa1fdee9072a29e21acc6e89ea3afbed801786431ceb"},"schema_version":"1.0","source":{"id":"1901.10241","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.10241","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"arxiv_version","alias_value":"1901.10241v1","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.10241","created_at":"2026-05-17T23:55:15Z"},{"alias_kind":"pith_short_12","alias_value":"2SOEZDK3CGWP","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2SOEZDK3CGWPKCMF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2SOEZDK3","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:d9e633fa72944f59b4841ebd45688432332bff8c2f515b04f96750c158aba0ec","target":"graph","created_at":"2026-05-17T23:55:15Z","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":"Context. The spectrum of the hydrogen atom was explained by Bohr more than one century ago. We revisit here some of the aspects of the underlying quantum structure, with a modern formalism, focusing on the limit of the Balmer series.\n  Aims. We investigate the behaviour of the absorption coefficient of the isolated hydrogen atom in the neighbourhood of the Balmer limit.\n  Methods. We analytically computed the total cross-section arising from bound-bound and bound-free transitions in the isolated hydrogen atom at the Balmer limit, and established a simplified semi-analytical model for the surro","authors_text":"Flavio Calvo, Luca Belluzzi, Oskar Steiner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-01-29T12:02:51Z","title":"Structure of the Balmer jump. The isolated hydrogen atom"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.10241","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":"sha256:9b0d2c1a0c2a40110ecf3d32f357efa216256072bf1202a9ded6f7b400ddb838","target":"record","created_at":"2026-05-17T23:55:15Z","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":"f73bc6f5dd3b6202b8b5e008dd7bd411f994f400289114929a3616fb7e2c74f3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-01-29T12:02:51Z","title_canon_sha256":"49fcaeb752a91033ac0faa1fdee9072a29e21acc6e89ea3afbed801786431ceb"},"schema_version":"1.0","source":{"id":"1901.10241","kind":"arxiv","version":1}},"canonical_sha256":"d49c4c8d5b11acf50985078beebc1e0365120677637eef1fe74e6e4c0b6dffc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d49c4c8d5b11acf50985078beebc1e0365120677637eef1fe74e6e4c0b6dffc9","first_computed_at":"2026-05-17T23:55:15.769027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:15.769027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"POPnZnQk5xt3GZs49Sb4orVt/gMHJpCRcGa3uHnikoikhW4+MzzngXh3UhH+xaylCTTZnNNzcE/+t37mx3pECA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:15.769517Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.10241","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b0d2c1a0c2a40110ecf3d32f357efa216256072bf1202a9ded6f7b400ddb838","sha256:d9e633fa72944f59b4841ebd45688432332bff8c2f515b04f96750c158aba0ec"],"state_sha256":"e49b7687218da189ed1f406787cda6ab3aef43180a9dee8a8e7f1a2a106ed877"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"75PXg0mWhuYGPr8QkspqvJjcBEx5XzIir5Id2PUhsXhaV0uvm0ytXC/CkDczt/GDktNJDlWEGDLS8a2jSQZYBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T22:52:23.704229Z","bundle_sha256":"de2d6af67a76252f12d5617fcdc04f604626c6d494a18ef8039e33d25624dc77"}}