{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:JNSXOEUWMM2LU7EGWGFTYMTVT6","short_pith_number":"pith:JNSXOEUW","canonical_record":{"source":{"id":"1706.07016","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T17:17:42Z","cross_cats_sorted":[],"title_canon_sha256":"c8c91e594f2e6df850f84c2c053410db3dc6b8cd7504d6ec2ac97996c69d3ba4","abstract_canon_sha256":"daec4a4ed0ae6b6055164979612ae37d05e483ec48f7952f3aea2a5dda946f52"},"schema_version":"1.0"},"canonical_sha256":"4b657712966334ba7c86b18b3c32759fb88c4a87a0ff9329ff5610326bd96f1d","source":{"kind":"arxiv","id":"1706.07016","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.07016","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"arxiv_version","alias_value":"1706.07016v2","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.07016","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"pith_short_12","alias_value":"JNSXOEUWMM2L","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"JNSXOEUWMM2LU7EG","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"JNSXOEUW","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:JNSXOEUWMM2LU7EGWGFTYMTVT6","target":"record","payload":{"canonical_record":{"source":{"id":"1706.07016","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T17:17:42Z","cross_cats_sorted":[],"title_canon_sha256":"c8c91e594f2e6df850f84c2c053410db3dc6b8cd7504d6ec2ac97996c69d3ba4","abstract_canon_sha256":"daec4a4ed0ae6b6055164979612ae37d05e483ec48f7952f3aea2a5dda946f52"},"schema_version":"1.0"},"canonical_sha256":"4b657712966334ba7c86b18b3c32759fb88c4a87a0ff9329ff5610326bd96f1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:17.921305Z","signature_b64":"0f0013+3WK4FrvcJA4Y05chV6Uh4o6WAnCIdteLddnDpPheqYMC6IRg+fIII573UP/FqBaMGytYBhY4yfZ80Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b657712966334ba7c86b18b3c32759fb88c4a87a0ff9329ff5610326bd96f1d","last_reissued_at":"2026-05-18T00:34:17.920647Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:17.920647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.07016","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":"2026-05-18T00:34:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fOeL/8Lzj3qUrFgaA61hWBgD00x+pYGnblt5jJ261vQ73EHuWMhoH5yen2jXBV3nJVoysGEeewVchf/e5hLwCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T07:34:23.935249Z"},"content_sha256":"c2fec24b76aebd41cad143edf52fcccf71a68357bc2d1e802028cdfc3763c4db","schema_version":"1.0","event_id":"sha256:c2fec24b76aebd41cad143edf52fcccf71a68357bc2d1e802028cdfc3763c4db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:JNSXOEUWMM2LU7EGWGFTYMTVT6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The high A_V Quasar Survey: A z=2.027 metal-rich damped Lyman-alpha absorber towards a red quasar at z=3.21","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cedric Ledoux, Jens-Kristian Krogager, Johan P. U. Fynbo, Kasper E. Heintz, Lise Christensen, Palle M{\\o}ller, Pall Jakobsson, Pasquier Noterdaeme, Stefan Geier","submitted_at":"2017-06-21T17:17:42Z","abstract_excerpt":"To fully exploit the potential of quasars as probes of cosmic chemical evolution and the internal gas dynamics of galaxies it is important to understand the selection effects behind the quasar samples and in particular if the selection criteria exclude foreground galaxies with certain properties (most importantly a high dust content). Here we present spectroscopic follow-up from the 10.4-m GTC telescope of a dust-reddened quasar, eHAQ0111+0641, from the extended High A_V Quasar (HAQ) survey. We find that the z=3.21 quasar has a foreground Damped Lyman-alpha Absorber (DLA) at z=2.027 along the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.07016","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":"2026-05-18T00:34:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/ZWlnB+oKRfwqhERsoVZxlKbsi04fJJZKtAxd1bpk4PvbLpC4WYpdgjjjTLk0VDfj3MtPyqHzWwTcLVZk0JSAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T07:34:23.935619Z"},"content_sha256":"f5f343b3529764641ef96f5695bba6ae8b85e9fa838e78b5ae6b8f0cc665b3ec","schema_version":"1.0","event_id":"sha256:f5f343b3529764641ef96f5695bba6ae8b85e9fa838e78b5ae6b8f0cc665b3ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/bundle.json","state_url":"https://pith.science/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/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":"2026-06-02T07:34:23Z","links":{"resolver":"https://pith.science/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6","bundle":"https://pith.science/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/bundle.json","state":"https://pith.science/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JNSXOEUWMM2LU7EGWGFTYMTVT6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:JNSXOEUWMM2LU7EGWGFTYMTVT6","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":"daec4a4ed0ae6b6055164979612ae37d05e483ec48f7952f3aea2a5dda946f52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T17:17:42Z","title_canon_sha256":"c8c91e594f2e6df850f84c2c053410db3dc6b8cd7504d6ec2ac97996c69d3ba4"},"schema_version":"1.0","source":{"id":"1706.07016","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.07016","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"arxiv_version","alias_value":"1706.07016v2","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.07016","created_at":"2026-05-18T00:34:17Z"},{"alias_kind":"pith_short_12","alias_value":"JNSXOEUWMM2L","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"JNSXOEUWMM2LU7EG","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"JNSXOEUW","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:f5f343b3529764641ef96f5695bba6ae8b85e9fa838e78b5ae6b8f0cc665b3ec","target":"graph","created_at":"2026-05-18T00:34:17Z","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":"To fully exploit the potential of quasars as probes of cosmic chemical evolution and the internal gas dynamics of galaxies it is important to understand the selection effects behind the quasar samples and in particular if the selection criteria exclude foreground galaxies with certain properties (most importantly a high dust content). Here we present spectroscopic follow-up from the 10.4-m GTC telescope of a dust-reddened quasar, eHAQ0111+0641, from the extended High A_V Quasar (HAQ) survey. We find that the z=3.21 quasar has a foreground Damped Lyman-alpha Absorber (DLA) at z=2.027 along the ","authors_text":"Cedric Ledoux, Jens-Kristian Krogager, Johan P. U. Fynbo, Kasper E. Heintz, Lise Christensen, Palle M{\\o}ller, Pall Jakobsson, Pasquier Noterdaeme, Stefan Geier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T17:17:42Z","title":"The high A_V Quasar Survey: A z=2.027 metal-rich damped Lyman-alpha absorber towards a red quasar at z=3.21"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.07016","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:c2fec24b76aebd41cad143edf52fcccf71a68357bc2d1e802028cdfc3763c4db","target":"record","created_at":"2026-05-18T00:34:17Z","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":"daec4a4ed0ae6b6055164979612ae37d05e483ec48f7952f3aea2a5dda946f52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T17:17:42Z","title_canon_sha256":"c8c91e594f2e6df850f84c2c053410db3dc6b8cd7504d6ec2ac97996c69d3ba4"},"schema_version":"1.0","source":{"id":"1706.07016","kind":"arxiv","version":2}},"canonical_sha256":"4b657712966334ba7c86b18b3c32759fb88c4a87a0ff9329ff5610326bd96f1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b657712966334ba7c86b18b3c32759fb88c4a87a0ff9329ff5610326bd96f1d","first_computed_at":"2026-05-18T00:34:17.920647Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:17.920647Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0f0013+3WK4FrvcJA4Y05chV6Uh4o6WAnCIdteLddnDpPheqYMC6IRg+fIII573UP/FqBaMGytYBhY4yfZ80Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:17.921305Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.07016","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c2fec24b76aebd41cad143edf52fcccf71a68357bc2d1e802028cdfc3763c4db","sha256:f5f343b3529764641ef96f5695bba6ae8b85e9fa838e78b5ae6b8f0cc665b3ec"],"state_sha256":"fb00f5b51081006d7fe56bde93100e61382e3be14a3bb3f757a4e2ffa94aa982"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PgBKecRinJqA1kcuCTDNJV6dYYWjv2UTqz2f37onf3XFZ/BXsmzzvpKH9QTw/OcTEVVSkMqIzhlxJKvhrm4vAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T07:34:23.937999Z","bundle_sha256":"d0ded783e9caba7089bdc04d70e124b6d0ad549d793c44577c3c461aa49c4d82"}}