{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:TAYJTZ2QLQYUHF56GVPBR5I7BD","short_pith_number":"pith:TAYJTZ2Q","canonical_record":{"source":{"id":"1809.03340","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-10T14:18:58Z","cross_cats_sorted":[],"title_canon_sha256":"e9ede611e7600cb3717e06027c3f0fe76f92e5a6a91d4590a39de47b6e684548","abstract_canon_sha256":"658ac7eaf482fd7e0dfe8546ca0edbc635f98d8b25cf9f4d8f70298bfab97137"},"schema_version":"1.0"},"canonical_sha256":"983099e7505c314397be355e18f51f08f9c37fdde67a2f7411ec2cf5d5396b01","source":{"kind":"arxiv","id":"1809.03340","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03340","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03340v1","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03340","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"pith_short_12","alias_value":"TAYJTZ2QLQYU","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TAYJTZ2QLQYUHF56","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TAYJTZ2Q","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:TAYJTZ2QLQYUHF56GVPBR5I7BD","target":"record","payload":{"canonical_record":{"source":{"id":"1809.03340","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-10T14:18:58Z","cross_cats_sorted":[],"title_canon_sha256":"e9ede611e7600cb3717e06027c3f0fe76f92e5a6a91d4590a39de47b6e684548","abstract_canon_sha256":"658ac7eaf482fd7e0dfe8546ca0edbc635f98d8b25cf9f4d8f70298bfab97137"},"schema_version":"1.0"},"canonical_sha256":"983099e7505c314397be355e18f51f08f9c37fdde67a2f7411ec2cf5d5396b01","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:07.139148Z","signature_b64":"T3xsMoNp5nXuqxYyfjlyl0+C3tETd3V+ALikVdIfQ9RfY++dd9T6awLx48wFbhESCfVZMllg0kMu+Atx4HkaBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"983099e7505c314397be355e18f51f08f9c37fdde67a2f7411ec2cf5d5396b01","last_reissued_at":"2026-05-18T00:06:07.138772Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:07.138772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.03340","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":"2026-05-18T00:06:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VH4DdnEAmqV05xK0icl3P1RJvq3ZbuoniSMsHJKsuE9SjD5QeUS37ldpFGLjAyODNDZVsS1ZBaiiaHVi4lPXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:40:37.745278Z"},"content_sha256":"4a592d6de2b361c280f084eee7564a21c725f685833b43cf0a7efeb869708a8b","schema_version":"1.0","event_id":"sha256:4a592d6de2b361c280f084eee7564a21c725f685833b43cf0a7efeb869708a8b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:TAYJTZ2QLQYUHF56GVPBR5I7BD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of large scale Ly$\\alpha$ absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Humphrey, M. Silva, P. Lagos, P. Papaderos, R. Guimar\\~aes, S.G. Morais, T. Scott","submitted_at":"2018-09-10T14:18:58Z","abstract_excerpt":"We present an investigation of the properties of the extended Ly$\\alpha$ halo and the large-scale \\ion{H}{I} absorbing structures associated with 5 high-redshift radio galaxies at z $>$ 2, using the Goodman long-slit spectrograph on the SOAR telescope, with the slit placed at large angles ($>$45$^{\\circ}$) to the radio axis, to study regions that are unlikely to be illuminated by the active nucleus. Spatially extended Ly$\\alpha$ emission is detected with large line widths (FWHM = 1000 -- 2500 km s$^{-1}$), which although impacted by resonant scattering, is suggestive of turbulent motion. We fi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03340","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":"2026-05-18T00:06:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pL8ABaBcmVepGQpvi1i+ZFVGzDFD9qHSVSWpfqx/LC7P81biSoY/DUC2HwOui8krEgPEU2IwG2KQ4v2x0qsgAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:40:37.745981Z"},"content_sha256":"d59769541f7f1c1174a9df94d8c3a49134c0fbbebbbf0b9d979e4eee8ad2bcf3","schema_version":"1.0","event_id":"sha256:d59769541f7f1c1174a9df94d8c3a49134c0fbbebbbf0b9d979e4eee8ad2bcf3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/bundle.json","state_url":"https://pith.science/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/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":"2026-05-27T05:40:37Z","links":{"resolver":"https://pith.science/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD","bundle":"https://pith.science/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/bundle.json","state":"https://pith.science/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TAYJTZ2QLQYUHF56GVPBR5I7BD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TAYJTZ2QLQYUHF56GVPBR5I7BD","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":"658ac7eaf482fd7e0dfe8546ca0edbc635f98d8b25cf9f4d8f70298bfab97137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-10T14:18:58Z","title_canon_sha256":"e9ede611e7600cb3717e06027c3f0fe76f92e5a6a91d4590a39de47b6e684548"},"schema_version":"1.0","source":{"id":"1809.03340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.03340","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"arxiv_version","alias_value":"1809.03340v1","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.03340","created_at":"2026-05-18T00:06:07Z"},{"alias_kind":"pith_short_12","alias_value":"TAYJTZ2QLQYU","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"TAYJTZ2QLQYUHF56","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"TAYJTZ2Q","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:d59769541f7f1c1174a9df94d8c3a49134c0fbbebbbf0b9d979e4eee8ad2bcf3","target":"graph","created_at":"2026-05-18T00:06:07Z","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 an investigation of the properties of the extended Ly$\\alpha$ halo and the large-scale \\ion{H}{I} absorbing structures associated with 5 high-redshift radio galaxies at z $>$ 2, using the Goodman long-slit spectrograph on the SOAR telescope, with the slit placed at large angles ($>$45$^{\\circ}$) to the radio axis, to study regions that are unlikely to be illuminated by the active nucleus. Spatially extended Ly$\\alpha$ emission is detected with large line widths (FWHM = 1000 -- 2500 km s$^{-1}$), which although impacted by resonant scattering, is suggestive of turbulent motion. We fi","authors_text":"A. Humphrey, M. Silva, P. Lagos, P. Papaderos, R. Guimar\\~aes, S.G. Morais, T. Scott","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-10T14:18:58Z","title":"Detection of large scale Ly$\\alpha$ absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.03340","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":"sha256:4a592d6de2b361c280f084eee7564a21c725f685833b43cf0a7efeb869708a8b","target":"record","created_at":"2026-05-18T00:06:07Z","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":"658ac7eaf482fd7e0dfe8546ca0edbc635f98d8b25cf9f4d8f70298bfab97137","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-10T14:18:58Z","title_canon_sha256":"e9ede611e7600cb3717e06027c3f0fe76f92e5a6a91d4590a39de47b6e684548"},"schema_version":"1.0","source":{"id":"1809.03340","kind":"arxiv","version":1}},"canonical_sha256":"983099e7505c314397be355e18f51f08f9c37fdde67a2f7411ec2cf5d5396b01","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"983099e7505c314397be355e18f51f08f9c37fdde67a2f7411ec2cf5d5396b01","first_computed_at":"2026-05-18T00:06:07.138772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:07.138772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T3xsMoNp5nXuqxYyfjlyl0+C3tETd3V+ALikVdIfQ9RfY++dd9T6awLx48wFbhESCfVZMllg0kMu+Atx4HkaBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:07.139148Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.03340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a592d6de2b361c280f084eee7564a21c725f685833b43cf0a7efeb869708a8b","sha256:d59769541f7f1c1174a9df94d8c3a49134c0fbbebbbf0b9d979e4eee8ad2bcf3"],"state_sha256":"ad1addb88312b807f0e150d9c26ee5a451f265c76a3dd4b604def575f908feb0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m5MiBGBBC1cSwwTyTuoLzbQACYXUknEw1mWAu2YMuwVDZMQdZjMAUwg6iSWJWlo85BkHLSHlIeyExdRaEnqBBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:40:37.749656Z","bundle_sha256":"bb01f4f2c2ec6b9b41c45c2785228773c7385e4cb64d02e9de9e9c84adc1c1de"}}