{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:HPUFO55EVSLIWOOMG45XMLM5O3","short_pith_number":"pith:HPUFO55E","canonical_record":{"source":{"id":"0909.4839","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-26T06:06:22Z","cross_cats_sorted":[],"title_canon_sha256":"a0cf9b4d5913f1a6298ec3f3479bfdbc93f18c341339f51e65e35166e2efb371","abstract_canon_sha256":"f8f8a3275900e669109a8245b69404987baa525a334f5adf370281c46bc271a7"},"schema_version":"1.0"},"canonical_sha256":"3be85777a4ac968b39cc373b762d9d76e4689f61a482556f230ce84742bc36ec","source":{"kind":"arxiv","id":"0909.4839","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4839","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4839v2","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4839","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"HPUFO55EVSLI","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"HPUFO55EVSLIWOOM","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"HPUFO55E","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:HPUFO55EVSLIWOOMG45XMLM5O3","target":"record","payload":{"canonical_record":{"source":{"id":"0909.4839","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-26T06:06:22Z","cross_cats_sorted":[],"title_canon_sha256":"a0cf9b4d5913f1a6298ec3f3479bfdbc93f18c341339f51e65e35166e2efb371","abstract_canon_sha256":"f8f8a3275900e669109a8245b69404987baa525a334f5adf370281c46bc271a7"},"schema_version":"1.0"},"canonical_sha256":"3be85777a4ac968b39cc373b762d9d76e4689f61a482556f230ce84742bc36ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:56:58.618428Z","signature_b64":"Gjh7nLQR9BAvra4DGnu0dkhslWcPQcNYxSgUUniSRUfhqMMUPTm0RhZNnHhso/Fh3NUMRFZWDBL1yekNjR2mDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3be85777a4ac968b39cc373b762d9d76e4689f61a482556f230ce84742bc36ec","last_reissued_at":"2026-05-18T00:56:58.617921Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:56:58.617921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.4839","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D+wsMEKpRkUz+XZq25zFlQjsKAXKy6ZyOW2bVH2bwFZHeDCK2ALdkgmIhtj99Gjbqvw7fpo7GiV4lvYOiSlLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:26:37.071410Z"},"content_sha256":"dfd4bf48ae39d515d702da754edd52cee33b88d328e18db1e98bc6b8d01ff6fe","schema_version":"1.0","event_id":"sha256:dfd4bf48ae39d515d702da754edd52cee33b88d328e18db1e98bc6b8d01ff6fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:HPUFO55EVSLIWOOMG45XMLM5O3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Damped and sub-damped Lyman-? absorbers in z > 4 QSOs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Ali Aghaee (USB, George Djorgovski (CALTECH), IPM), Pasquier Noterdaeme (IUCAA), Patrick Petitjean (IAP), Paulo Da Rocha Poppe (UEFS), Reinaldo Ramos De Carvalho (INPE), Rodney Guimaraes (UEFS), Sandra Castro (ESO)","submitted_at":"2009-09-26T06:06:22Z","abstract_excerpt":"We present the results of a survey for damped (DLA, log N(H I) > 20.3) and sub-damped Lyman-? systems (19.5 < log N(H I) < 20.3) at z > 2.55 along the lines-of-sight to 77 quasars with emission redshifts in the range 4 < zem < 6.3. Intermediate resolution (R ? 4300) spectra have been obtained with the Echellette Spectrograph and Imager (ESI) mounted on the Keck telescope. A total of 100 systems with log N(H I) > 19.5 are detected of which 40 systems are damped Lyman-? systems for an absorption length of ?X = 378. About half of the lines of sight of this homogeneous survey have never been inves"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4839","kind":"arxiv","version":2},"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":"2026-05-18T00:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kVh6jQZmKcgWNnMmPKuu3YANmBkiDWOEujG1AYBeuTuukpu31I7gxvquOLCGyf980Q8FTEaslLsq6bU6iGYLAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:26:37.072429Z"},"content_sha256":"de4dc2922a6ca6f15e91e1ede8292241bf51870d78fafaebd10b8ab227722059","schema_version":"1.0","event_id":"sha256:de4dc2922a6ca6f15e91e1ede8292241bf51870d78fafaebd10b8ab227722059"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HPUFO55EVSLIWOOMG45XMLM5O3/bundle.json","state_url":"https://pith.science/pith/HPUFO55EVSLIWOOMG45XMLM5O3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HPUFO55EVSLIWOOMG45XMLM5O3/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":"2026-05-29T17:26:37Z","links":{"resolver":"https://pith.science/pith/HPUFO55EVSLIWOOMG45XMLM5O3","bundle":"https://pith.science/pith/HPUFO55EVSLIWOOMG45XMLM5O3/bundle.json","state":"https://pith.science/pith/HPUFO55EVSLIWOOMG45XMLM5O3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HPUFO55EVSLIWOOMG45XMLM5O3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:HPUFO55EVSLIWOOMG45XMLM5O3","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":"f8f8a3275900e669109a8245b69404987baa525a334f5adf370281c46bc271a7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-26T06:06:22Z","title_canon_sha256":"a0cf9b4d5913f1a6298ec3f3479bfdbc93f18c341339f51e65e35166e2efb371"},"schema_version":"1.0","source":{"id":"0909.4839","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.4839","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"0909.4839v2","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.4839","created_at":"2026-05-18T00:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"HPUFO55EVSLI","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"HPUFO55EVSLIWOOM","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"HPUFO55E","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:de4dc2922a6ca6f15e91e1ede8292241bf51870d78fafaebd10b8ab227722059","target":"graph","created_at":"2026-05-18T00:56:58Z","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 present the results of a survey for damped (DLA, log N(H I) > 20.3) and sub-damped Lyman-? systems (19.5 < log N(H I) < 20.3) at z > 2.55 along the lines-of-sight to 77 quasars with emission redshifts in the range 4 < zem < 6.3. Intermediate resolution (R ? 4300) spectra have been obtained with the Echellette Spectrograph and Imager (ESI) mounted on the Keck telescope. A total of 100 systems with log N(H I) > 19.5 are detected of which 40 systems are damped Lyman-? systems for an absorption length of ?X = 378. About half of the lines of sight of this homogeneous survey have never been inves","authors_text":"Ali Aghaee (USB, George Djorgovski (CALTECH), IPM), Pasquier Noterdaeme (IUCAA), Patrick Petitjean (IAP), Paulo Da Rocha Poppe (UEFS), Reinaldo Ramos De Carvalho (INPE), Rodney Guimaraes (UEFS), Sandra Castro (ESO)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-26T06:06:22Z","title":"Damped and sub-damped Lyman-? absorbers in z > 4 QSOs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.4839","kind":"arxiv","version":2},"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:dfd4bf48ae39d515d702da754edd52cee33b88d328e18db1e98bc6b8d01ff6fe","target":"record","created_at":"2026-05-18T00:56:58Z","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":"f8f8a3275900e669109a8245b69404987baa525a334f5adf370281c46bc271a7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-26T06:06:22Z","title_canon_sha256":"a0cf9b4d5913f1a6298ec3f3479bfdbc93f18c341339f51e65e35166e2efb371"},"schema_version":"1.0","source":{"id":"0909.4839","kind":"arxiv","version":2}},"canonical_sha256":"3be85777a4ac968b39cc373b762d9d76e4689f61a482556f230ce84742bc36ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3be85777a4ac968b39cc373b762d9d76e4689f61a482556f230ce84742bc36ec","first_computed_at":"2026-05-18T00:56:58.617921Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:58.617921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gjh7nLQR9BAvra4DGnu0dkhslWcPQcNYxSgUUniSRUfhqMMUPTm0RhZNnHhso/Fh3NUMRFZWDBL1yekNjR2mDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:58.618428Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.4839","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfd4bf48ae39d515d702da754edd52cee33b88d328e18db1e98bc6b8d01ff6fe","sha256:de4dc2922a6ca6f15e91e1ede8292241bf51870d78fafaebd10b8ab227722059"],"state_sha256":"00536bcc09ad8168f5996b10b1b14c6835c093dda57d5d5139a66b20b10f89e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"71zU0IXrju7aJ/Ge8M+zmmAD8S5tp+ygBMZC6hilYgkeWBpLelmdkFP4vFurvVrofTHY9Sb3VxKJPtATO0UyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:26:37.075738Z","bundle_sha256":"07a49f9f5aae5be6e96526e1e61d78d384a112815fa70c6fe44787756a52cffb"}}