{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:RP7HEAPR6ZURQCUWOMT3M2KR5H","short_pith_number":"pith:RP7HEAPR","canonical_record":{"source":{"id":"astro-ph/9908134","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-08-12T14:54:35Z","cross_cats_sorted":[],"title_canon_sha256":"12b234ff991eed8ee555abeb1e67be5b88325508612a40646de88db4abafbbe7","abstract_canon_sha256":"da3e41f0769e756c485c43e0c3e553d617e4d390ebf9cdb8a3a521dc2fea39f2"},"schema_version":"1.0"},"canonical_sha256":"8bfe7201f1f669180a967327b66951e9c6c4f1075545beba720171f81637734c","source":{"kind":"arxiv","id":"astro-ph/9908134","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9908134","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9908134v1","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9908134","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"pith_short_12","alias_value":"RP7HEAPR6ZUR","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"RP7HEAPR6ZURQCUW","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"RP7HEAPR","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:RP7HEAPR6ZURQCUWOMT3M2KR5H","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9908134","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-08-12T14:54:35Z","cross_cats_sorted":[],"title_canon_sha256":"12b234ff991eed8ee555abeb1e67be5b88325508612a40646de88db4abafbbe7","abstract_canon_sha256":"da3e41f0769e756c485c43e0c3e553d617e4d390ebf9cdb8a3a521dc2fea39f2"},"schema_version":"1.0"},"canonical_sha256":"8bfe7201f1f669180a967327b66951e9c6c4f1075545beba720171f81637734c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:32.097473Z","signature_b64":"nOB6Td+1VUgkPEPELoopb+hHHjSFyeK82tPmjqKaV/nhlON6P5JupcT/YaYGly721tmPc3XX24HAKDB3hNrAAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8bfe7201f1f669180a967327b66951e9c6c4f1075545beba720171f81637734c","last_reissued_at":"2026-05-18T04:21:32.097043Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:32.097043Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9908134","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":"2026-05-18T04:21:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c+xD4d525BFB7HBMNxMXIuZlv3Gzb2BYjCp98EX8JXjEy1tsmzOFAwjpmKnsUGsoMr3Wp25EnfO46M57hNPwAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:52:21.485918Z"},"content_sha256":"580a5b741ef9ca4d4123df8f8946bf2067c2f1fd9ed4f7ede2492fd2b09ac970","schema_version":"1.0","event_id":"sha256:580a5b741ef9ca4d4123df8f8946bf2067c2f1fd9ed4f7ede2492fd2b09ac970"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:RP7HEAPR6ZURQCUWOMT3M2KR5H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HS 1603+3820: a bright z(em)=2.51 quasar with a very rich heavy element absorption spectrum","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Dobrzycki (Harvard-Smithsonian Center for Astrophysics), D. Engels, H.-J. Hagen (Hamburger Sternwarte)","submitted_at":"1999-08-12T14:54:35Z","abstract_excerpt":"During the course of Hamburg/CfA Bright Quasar Survey we discovered a bright (B=15.9), high redshift (z=2.51) quasar HS 1603+3820. The quasar has a rich complex of CIV absorbers, containing at least five systems, all within 3000 km/s from one another. Despite large ejection velocity (v(ej)>5000 km/s for all components) the complex is likely to be associated with the quasar. There are at least three more associated heavy element absorbers, two of which have z(abs)>z(em). Together, they make one of the richest known complexes of associated heavy element absorbers, and the richest in objects with"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9908134","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":"2026-05-18T04:21:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tROPGnWtrwCE/WrdlNpqHpFu8QOZD7ULt7zhrNUfnVAlVtdOjQx9zG6PDcwUmm+HBkq95yFw1Q9VWSO/B9INBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:52:21.486263Z"},"content_sha256":"5286b6ade7db7db708e507787c30a991b36b2a9bd743f738ea48f953ffd5863f","schema_version":"1.0","event_id":"sha256:5286b6ade7db7db708e507787c30a991b36b2a9bd743f738ea48f953ffd5863f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/bundle.json","state_url":"https://pith.science/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/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":"2026-06-10T21:52:21Z","links":{"resolver":"https://pith.science/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H","bundle":"https://pith.science/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/bundle.json","state":"https://pith.science/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RP7HEAPR6ZURQCUWOMT3M2KR5H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:RP7HEAPR6ZURQCUWOMT3M2KR5H","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":"da3e41f0769e756c485c43e0c3e553d617e4d390ebf9cdb8a3a521dc2fea39f2","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-08-12T14:54:35Z","title_canon_sha256":"12b234ff991eed8ee555abeb1e67be5b88325508612a40646de88db4abafbbe7"},"schema_version":"1.0","source":{"id":"astro-ph/9908134","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9908134","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9908134v1","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9908134","created_at":"2026-05-18T04:21:32Z"},{"alias_kind":"pith_short_12","alias_value":"RP7HEAPR6ZUR","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"RP7HEAPR6ZURQCUW","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"RP7HEAPR","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:5286b6ade7db7db708e507787c30a991b36b2a9bd743f738ea48f953ffd5863f","target":"graph","created_at":"2026-05-18T04:21:32Z","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":"During the course of Hamburg/CfA Bright Quasar Survey we discovered a bright (B=15.9), high redshift (z=2.51) quasar HS 1603+3820. The quasar has a rich complex of CIV absorbers, containing at least five systems, all within 3000 km/s from one another. Despite large ejection velocity (v(ej)>5000 km/s for all components) the complex is likely to be associated with the quasar. There are at least three more associated heavy element absorbers, two of which have z(abs)>z(em). Together, they make one of the richest known complexes of associated heavy element absorbers, and the richest in objects with","authors_text":"A. Dobrzycki (Harvard-Smithsonian Center for Astrophysics), D. Engels, H.-J. Hagen (Hamburger Sternwarte)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-08-12T14:54:35Z","title":"HS 1603+3820: a bright z(em)=2.51 quasar with a very rich heavy element absorption spectrum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9908134","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":"sha256:580a5b741ef9ca4d4123df8f8946bf2067c2f1fd9ed4f7ede2492fd2b09ac970","target":"record","created_at":"2026-05-18T04:21:32Z","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":"da3e41f0769e756c485c43e0c3e553d617e4d390ebf9cdb8a3a521dc2fea39f2","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-08-12T14:54:35Z","title_canon_sha256":"12b234ff991eed8ee555abeb1e67be5b88325508612a40646de88db4abafbbe7"},"schema_version":"1.0","source":{"id":"astro-ph/9908134","kind":"arxiv","version":1}},"canonical_sha256":"8bfe7201f1f669180a967327b66951e9c6c4f1075545beba720171f81637734c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8bfe7201f1f669180a967327b66951e9c6c4f1075545beba720171f81637734c","first_computed_at":"2026-05-18T04:21:32.097043Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:32.097043Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nOB6Td+1VUgkPEPELoopb+hHHjSFyeK82tPmjqKaV/nhlON6P5JupcT/YaYGly721tmPc3XX24HAKDB3hNrAAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:32.097473Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9908134","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:580a5b741ef9ca4d4123df8f8946bf2067c2f1fd9ed4f7ede2492fd2b09ac970","sha256:5286b6ade7db7db708e507787c30a991b36b2a9bd743f738ea48f953ffd5863f"],"state_sha256":"d64621836dd4389005f18d168131fa2172f23be2726afc34fc40af9e61699a74"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SFDJmSqdqj1M8FMcj5b4mAcF2BrikSeUA9HXWxwNWMJbIWhgYcYvN+a0kFbXDPX831rKLuI7E01/+lpgc1A6BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T21:52:21.488331Z","bundle_sha256":"e5d1cb91ee49a0384e7d79fc2639ac6b66fa189fcaee40f3b25f8f0cdd9651f3"}}