{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:OVFNTZKQZL6RTG67C2NSQRB632","short_pith_number":"pith:OVFNTZKQ","canonical_record":{"source":{"id":"1605.04607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c70c32f03f2ec64bdb92bf8cbe883740d4b5f513f380a860c4c3b47488ca329","abstract_canon_sha256":"6c86a5e13ebb5f28e82daa27408d67ddb3b6ece5f86bc92c4ab2ad45a2341784"},"schema_version":"1.0"},"canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","source":{"kind":"arxiv","id":"1605.04607","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.04607","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"arxiv_version","alias_value":"1605.04607v1","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.04607","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"pith_short_12","alias_value":"OVFNTZKQZL6R","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OVFNTZKQZL6RTG67","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OVFNTZKQ","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:OVFNTZKQZL6RTG67C2NSQRB632","target":"record","payload":{"canonical_record":{"source":{"id":"1605.04607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"6c70c32f03f2ec64bdb92bf8cbe883740d4b5f513f380a860c4c3b47488ca329","abstract_canon_sha256":"6c86a5e13ebb5f28e82daa27408d67ddb3b6ece5f86bc92c4ab2ad45a2341784"},"schema_version":"1.0"},"canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:05:43.233474Z","signature_b64":"ETGuHsd6gh74tfPV5cppNo5a+VZKhDk0p3r5FuecyudS7v7CDvozkre5Y3zMjpJFqdwKsi7NsIJwHHpQ47ZbCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","last_reissued_at":"2026-05-18T01:05:43.233044Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:05:43.233044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.04607","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":"2026-05-18T01:05:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nmRSzK6pSZDbNl5P1VRSof6gu2bQHz21rVZ7pYu5wTm0WQfj1wcj7saqiqIWFv1lg0v9pVyc5EIn4kmZ873VDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T08:27:20.644229Z"},"content_sha256":"721a8887e8711747a28ca07d96fb965feefd735a2a12f80e1fcaff3dce623d1d","schema_version":"1.0","event_id":"sha256:721a8887e8711747a28ca07d96fb965feefd735a2a12f80e1fcaff3dce623d1d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:OVFNTZKQZL6RTG67C2NSQRB632","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Frederick Hamann, G\\'abor Worseck, George D. Becker, Guido Cupani, Isabelle P\\^aris, J. Xavier Prochaska, Kelly D. Denney, Lise Christensen, Marianne Vestergaard, Sara Ellison, Sebastian L\\`opez, Serena Perrotta, Stefano Cristiani, Trystyn A. M. Berg, Valentina D'Odorico","submitted_at":"2016-05-15T21:39:48Z","abstract_excerpt":"We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity cut-off. We analyze the spectra of 100 quasars with 3.5 < z$\\rm_{em}$ < 4.5, observed with X-shooter/VLT in the context of the XQ-100 Legacy Survey. We detect a $\\sim$ 8 $\\sigma$ excess in the number density of absorbers within 10,000 km/s of the quasar emission redshift with respect to the random occurrence of NALs. This excess does not show a depe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.04607","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":"2026-05-18T01:05:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y0xFffJq0olrWuUMTazMXS2RLDLsuYnHwg57rjfJyVX8k+sNUGH5sUKw/e8V/EKNFqdewV6BI1hSaJPOpldZBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T08:27:20.644923Z"},"content_sha256":"7f23ca5a65eca58f98521a8eab6c94af9443e6b6944cc6865096089212a8643b","schema_version":"1.0","event_id":"sha256:7f23ca5a65eca58f98521a8eab6c94af9443e6b6944cc6865096089212a8643b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/bundle.json","state_url":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OVFNTZKQZL6RTG67C2NSQRB632/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":"2026-05-19T08:27:20Z","links":{"resolver":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632","bundle":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/bundle.json","state":"https://pith.science/pith/OVFNTZKQZL6RTG67C2NSQRB632/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OVFNTZKQZL6RTG67C2NSQRB632/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:OVFNTZKQZL6RTG67C2NSQRB632","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":"6c86a5e13ebb5f28e82daa27408d67ddb3b6ece5f86bc92c4ab2ad45a2341784","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","title_canon_sha256":"6c70c32f03f2ec64bdb92bf8cbe883740d4b5f513f380a860c4c3b47488ca329"},"schema_version":"1.0","source":{"id":"1605.04607","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.04607","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"arxiv_version","alias_value":"1605.04607v1","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.04607","created_at":"2026-05-18T01:05:43Z"},{"alias_kind":"pith_short_12","alias_value":"OVFNTZKQZL6R","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OVFNTZKQZL6RTG67","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OVFNTZKQ","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:7f23ca5a65eca58f98521a8eab6c94af9443e6b6944cc6865096089212a8643b","target":"graph","created_at":"2026-05-18T01:05:43Z","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 statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity cut-off. We analyze the spectra of 100 quasars with 3.5 < z$\\rm_{em}$ < 4.5, observed with X-shooter/VLT in the context of the XQ-100 Legacy Survey. We detect a $\\sim$ 8 $\\sigma$ excess in the number density of absorbers within 10,000 km/s of the quasar emission redshift with respect to the random occurrence of NALs. This excess does not show a depe","authors_text":"Frederick Hamann, G\\'abor Worseck, George D. Becker, Guido Cupani, Isabelle P\\^aris, J. Xavier Prochaska, Kelly D. Denney, Lise Christensen, Marianne Vestergaard, Sara Ellison, Sebastian L\\`opez, Serena Perrotta, Stefano Cristiani, Trystyn A. M. Berg, Valentina D'Odorico","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","title":"Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.04607","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":"sha256:721a8887e8711747a28ca07d96fb965feefd735a2a12f80e1fcaff3dce623d1d","target":"record","created_at":"2026-05-18T01:05:43Z","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":"6c86a5e13ebb5f28e82daa27408d67ddb3b6ece5f86bc92c4ab2ad45a2341784","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-05-15T21:39:48Z","title_canon_sha256":"6c70c32f03f2ec64bdb92bf8cbe883740d4b5f513f380a860c4c3b47488ca329"},"schema_version":"1.0","source":{"id":"1605.04607","kind":"arxiv","version":1}},"canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"754ad9e550cafd199bdf169b28443edea2de50866905db61e7d6d2125a6b275f","first_computed_at":"2026-05-18T01:05:43.233044Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:43.233044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ETGuHsd6gh74tfPV5cppNo5a+VZKhDk0p3r5FuecyudS7v7CDvozkre5Y3zMjpJFqdwKsi7NsIJwHHpQ47ZbCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:43.233474Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.04607","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:721a8887e8711747a28ca07d96fb965feefd735a2a12f80e1fcaff3dce623d1d","sha256:7f23ca5a65eca58f98521a8eab6c94af9443e6b6944cc6865096089212a8643b"],"state_sha256":"fd151f03783e9efeb9f1d8fd5f15f892c8cf8017c8c969448313432d0c8bd75b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2l8HYUmwR/kAEPv5Xh3K3bIIxieqzaJOMqaSgo9rv8fCce/EiMcdRP3XMEUoEv7h+wCfeT4P1v3cJZFs0r2GBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T08:27:20.647941Z","bundle_sha256":"8631c5e1a68029a9259597813bd9f9fd3a84ba0dfc241ec4c000e1cce1a31bf1"}}