{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:UC45CGHBYZ4AOLWT6EP3RFKTUS","short_pith_number":"pith:UC45CGHB","canonical_record":{"source":{"id":"1709.06335","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T10:36:31Z","cross_cats_sorted":[],"title_canon_sha256":"74ea6a88bc4815018e8339eb68498984a58070d686c35013f272a73e9fe05210","abstract_canon_sha256":"5f4de1363969575ef002fefe21538a45f0d96ef17a54dee6d471c43bb20f4672"},"schema_version":"1.0"},"canonical_sha256":"a0b9d118e1c678072ed3f11fb89553a49b4836156d25f74d485b80ff1a2c81e2","source":{"kind":"arxiv","id":"1709.06335","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.06335","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"arxiv_version","alias_value":"1709.06335v2","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.06335","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"pith_short_12","alias_value":"UC45CGHBYZ4A","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UC45CGHBYZ4AOLWT","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UC45CGHB","created_at":"2026-05-18T12:31:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:UC45CGHBYZ4AOLWT6EP3RFKTUS","target":"record","payload":{"canonical_record":{"source":{"id":"1709.06335","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T10:36:31Z","cross_cats_sorted":[],"title_canon_sha256":"74ea6a88bc4815018e8339eb68498984a58070d686c35013f272a73e9fe05210","abstract_canon_sha256":"5f4de1363969575ef002fefe21538a45f0d96ef17a54dee6d471c43bb20f4672"},"schema_version":"1.0"},"canonical_sha256":"a0b9d118e1c678072ed3f11fb89553a49b4836156d25f74d485b80ff1a2c81e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:39.792331Z","signature_b64":"bGwaGfYc5qKHfArUUnMtbobS5cj8c1cNdbNw9xLNQvdHyYgrbexqXVOjdM+YSqwvalFiOhjD3Su5ya3MNUuaBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0b9d118e1c678072ed3f11fb89553a49b4836156d25f74d485b80ff1a2c81e2","last_reissued_at":"2026-05-18T00:31:39.791855Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:39.791855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.06335","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":"2026-05-18T00:31:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P9fx5uwOgenw8HJOuc0qNe6yrdipvkxUajYtkPtMb2IC3B5ixumwNL5zSo81iJRzqGnSugfQ1nBPJh5BNf/IBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:54:57.054764Z"},"content_sha256":"b603778a2f22ff8691067f03fef44a697f13acbd6a66ff88eb2051f2a96f0b3c","schema_version":"1.0","event_id":"sha256:b603778a2f22ff8691067f03fef44a697f13acbd6a66ff88eb2051f2a96f0b3c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:UC45CGHBYZ4AOLWT6EP3RFKTUS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-IR spectroscopy of luminous LoBAL quasars at 1<z<2.5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andreas Schulze, Hideyuki Izumiura, Jari Kotilainen, Koki Terao, Malte Schramm, Tanya Urrutia, Thomas Reynolds, Tohru Nagao, Wenwen Zuo, Xue-Bing Wu","submitted_at":"2017-09-19T10:36:31Z","abstract_excerpt":"We present near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1.3<z<2.5, with 12 objects at z~1.5 and 10 at z~2.3. The spectra cover the rest-frame H$\\alpha$ and H$\\beta$ line regions, allowing us to obtain robust black hole mass estimates based on the broad H$\\alpha$ line. We use these data, augmented by a lower-redshift sample from the Sloan Digital Sky Survey, to test the proposed youth scenario for LoBALs, which suggests that LoBALs constitute an early short-lived evolutionary stage of quasar activity, by probing for any difference in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.06335","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":"2026-05-18T00:31:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fVOYNAVrWoAoTyFum4ghOFSOzdhsUqPHjJWwpwRjZLcKUTPyG+KoXdjqr7Bqhqt0kD4ZuYtx7MhXeXh4NWiBAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:54:57.055420Z"},"content_sha256":"63d937806fc84be54bdae62ee368d7e6a495e5c15dcf736f9569f0e715a37793","schema_version":"1.0","event_id":"sha256:63d937806fc84be54bdae62ee368d7e6a495e5c15dcf736f9569f0e715a37793"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/bundle.json","state_url":"https://pith.science/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/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":"2026-05-27T20:54:57Z","links":{"resolver":"https://pith.science/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS","bundle":"https://pith.science/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/bundle.json","state":"https://pith.science/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UC45CGHBYZ4AOLWT6EP3RFKTUS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UC45CGHBYZ4AOLWT6EP3RFKTUS","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":"5f4de1363969575ef002fefe21538a45f0d96ef17a54dee6d471c43bb20f4672","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T10:36:31Z","title_canon_sha256":"74ea6a88bc4815018e8339eb68498984a58070d686c35013f272a73e9fe05210"},"schema_version":"1.0","source":{"id":"1709.06335","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.06335","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"arxiv_version","alias_value":"1709.06335v2","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.06335","created_at":"2026-05-18T00:31:39Z"},{"alias_kind":"pith_short_12","alias_value":"UC45CGHBYZ4A","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UC45CGHBYZ4AOLWT","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UC45CGHB","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:63d937806fc84be54bdae62ee368d7e6a495e5c15dcf736f9569f0e715a37793","target":"graph","created_at":"2026-05-18T00:31:39Z","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 near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1.3<z<2.5, with 12 objects at z~1.5 and 10 at z~2.3. The spectra cover the rest-frame H$\\alpha$ and H$\\beta$ line regions, allowing us to obtain robust black hole mass estimates based on the broad H$\\alpha$ line. We use these data, augmented by a lower-redshift sample from the Sloan Digital Sky Survey, to test the proposed youth scenario for LoBALs, which suggests that LoBALs constitute an early short-lived evolutionary stage of quasar activity, by probing for any difference in ","authors_text":"Andreas Schulze, Hideyuki Izumiura, Jari Kotilainen, Koki Terao, Malte Schramm, Tanya Urrutia, Thomas Reynolds, Tohru Nagao, Wenwen Zuo, Xue-Bing Wu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T10:36:31Z","title":"Near-IR spectroscopy of luminous LoBAL quasars at 1<z<2.5"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.06335","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:b603778a2f22ff8691067f03fef44a697f13acbd6a66ff88eb2051f2a96f0b3c","target":"record","created_at":"2026-05-18T00:31:39Z","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":"5f4de1363969575ef002fefe21538a45f0d96ef17a54dee6d471c43bb20f4672","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T10:36:31Z","title_canon_sha256":"74ea6a88bc4815018e8339eb68498984a58070d686c35013f272a73e9fe05210"},"schema_version":"1.0","source":{"id":"1709.06335","kind":"arxiv","version":2}},"canonical_sha256":"a0b9d118e1c678072ed3f11fb89553a49b4836156d25f74d485b80ff1a2c81e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0b9d118e1c678072ed3f11fb89553a49b4836156d25f74d485b80ff1a2c81e2","first_computed_at":"2026-05-18T00:31:39.791855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:39.791855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bGwaGfYc5qKHfArUUnMtbobS5cj8c1cNdbNw9xLNQvdHyYgrbexqXVOjdM+YSqwvalFiOhjD3Su5ya3MNUuaBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:39.792331Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.06335","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b603778a2f22ff8691067f03fef44a697f13acbd6a66ff88eb2051f2a96f0b3c","sha256:63d937806fc84be54bdae62ee368d7e6a495e5c15dcf736f9569f0e715a37793"],"state_sha256":"f89b795b172e695463e0b62f53d8422b706c0c4381060aac960a93525989f098"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lpUoc//xpMG0FIod+Qp7CP+LOTGoiyQLax2zx974TDir95LWbWbJjaBmm2YrSXikPwxhs7V6JL/KONpxxYO7DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:54:57.058844Z","bundle_sha256":"40502cf3ecc81230c41da96040cb521527775c805d4826e44d002793de4fa4aa"}}