{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:LFY5TE6NKQNDGWOCPIKBNYBLRA","short_pith_number":"pith:LFY5TE6N","canonical_record":{"source":{"id":"1612.02829","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-08T21:00:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"27b205389d73038096d098948c4dd09b747d72b2d19ec67d62a7067a92108654","abstract_canon_sha256":"1a83ec24631eb7ccda918af61b291752617167b7689e3a9ac6581e66eb79ccd1"},"schema_version":"1.0"},"canonical_sha256":"5971d993cd541a3359c27a1416e02b8805dbaea2ba5475c01a4e41b9be178533","source":{"kind":"arxiv","id":"1612.02829","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.02829","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"arxiv_version","alias_value":"1612.02829v2","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.02829","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"pith_short_12","alias_value":"LFY5TE6NKQND","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LFY5TE6NKQNDGWOC","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LFY5TE6N","created_at":"2026-05-18T12:30:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:LFY5TE6NKQNDGWOCPIKBNYBLRA","target":"record","payload":{"canonical_record":{"source":{"id":"1612.02829","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-08T21:00:07Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"27b205389d73038096d098948c4dd09b747d72b2d19ec67d62a7067a92108654","abstract_canon_sha256":"1a83ec24631eb7ccda918af61b291752617167b7689e3a9ac6581e66eb79ccd1"},"schema_version":"1.0"},"canonical_sha256":"5971d993cd541a3359c27a1416e02b8805dbaea2ba5475c01a4e41b9be178533","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:16.345718Z","signature_b64":"5NFnBJziVbC/Tu77Yqu1rwurNMWozXLPCfFdjuJOtGodxlRu6WyduCtvEWqMH/Li2JZUvsQBjZ18WHv4GgBeDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5971d993cd541a3359c27a1416e02b8805dbaea2ba5475c01a4e41b9be178533","last_reissued_at":"2026-05-18T00:28:16.345116Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:16.345116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.02829","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":"2026-05-18T00:28:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f50cQYgwQfKHng5gT0LgQkKHIVb1kFz8m0KwxH8wD1NXfVLIMKwH1FE+fSJqBa7F4bQVYfFwY59G2/w+Nx4XDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:10:26.264177Z"},"content_sha256":"2fce725883c77a11a6cd85586e9f4e459a25bbad70d8b7756d718be8f39cff9f","schema_version":"1.0","event_id":"sha256:2fce725883c77a11a6cd85586e9f4e459a25bbad70d8b7756d718be8f39cff9f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:LFY5TE6NKQNDGWOCPIKBNYBLRA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mg II Absorption at 2<z<7 with Magellan/FIRE, III. Full Statistics of Absorption Towards 100 High-Redshift QSOs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Bram Venemans, Chiara Mazzucchelli, Daniel Miller, Eduardo Ba\\~nados, Emanuele P. Farina, Fabian Walter, Gabor Furesz, Kathy Cooksey, Michael Matejek, Monica Turner, Paul Torrey, Robert A. Simcoe, Roberto Decarli, Shi-Fan S. Chen, Tom Cooper","submitted_at":"2016-12-08T21:00:07Z","abstract_excerpt":"We present final statistics from a survey for intervening MgII absorption towards 100 quasars with emission redshifts between $z=3.55$ and $z=7.08$. Using infrared spectra from Magellan/FIRE, we detect 279 cosmological MgII absorbers, and confirm that the incidence rate of $W_r>0.3 \\AA$ MgII absorption per comoving path length does not evolve measurably between $z=0.25$ and $z=7$. This is consistent with our detection of seven new MgII systems at $z>6$, a redshift range that was not covered in prior searches. Restricting to relatively strong MgII systems ($W_r>1$\\AA), there is significant evid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.02829","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":"2026-05-18T00:28:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VwuS7x+ApnWc37xlqaMBG0M4dvohe43rxU0DqhT68eK/scPS0kL0rpsZFajdcWOV5qop0MdTrgP/NI0CwBV5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:10:26.264738Z"},"content_sha256":"255cecf8ae2da3b3cc71548224afc1b1d362610422956e750b9cb3143674c88b","schema_version":"1.0","event_id":"sha256:255cecf8ae2da3b3cc71548224afc1b1d362610422956e750b9cb3143674c88b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/bundle.json","state_url":"https://pith.science/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/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":"2026-06-04T23:10:26Z","links":{"resolver":"https://pith.science/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA","bundle":"https://pith.science/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/bundle.json","state":"https://pith.science/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LFY5TE6NKQNDGWOCPIKBNYBLRA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:LFY5TE6NKQNDGWOCPIKBNYBLRA","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":"1a83ec24631eb7ccda918af61b291752617167b7689e3a9ac6581e66eb79ccd1","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-08T21:00:07Z","title_canon_sha256":"27b205389d73038096d098948c4dd09b747d72b2d19ec67d62a7067a92108654"},"schema_version":"1.0","source":{"id":"1612.02829","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.02829","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"arxiv_version","alias_value":"1612.02829v2","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.02829","created_at":"2026-05-18T00:28:16Z"},{"alias_kind":"pith_short_12","alias_value":"LFY5TE6NKQND","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_16","alias_value":"LFY5TE6NKQNDGWOC","created_at":"2026-05-18T12:30:29Z"},{"alias_kind":"pith_short_8","alias_value":"LFY5TE6N","created_at":"2026-05-18T12:30:29Z"}],"graph_snapshots":[{"event_id":"sha256:255cecf8ae2da3b3cc71548224afc1b1d362610422956e750b9cb3143674c88b","target":"graph","created_at":"2026-05-18T00:28:16Z","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 final statistics from a survey for intervening MgII absorption towards 100 quasars with emission redshifts between $z=3.55$ and $z=7.08$. Using infrared spectra from Magellan/FIRE, we detect 279 cosmological MgII absorbers, and confirm that the incidence rate of $W_r>0.3 \\AA$ MgII absorption per comoving path length does not evolve measurably between $z=0.25$ and $z=7$. This is consistent with our detection of seven new MgII systems at $z>6$, a redshift range that was not covered in prior searches. Restricting to relatively strong MgII systems ($W_r>1$\\AA), there is significant evid","authors_text":"Bram Venemans, Chiara Mazzucchelli, Daniel Miller, Eduardo Ba\\~nados, Emanuele P. Farina, Fabian Walter, Gabor Furesz, Kathy Cooksey, Michael Matejek, Monica Turner, Paul Torrey, Robert A. Simcoe, Roberto Decarli, Shi-Fan S. Chen, Tom Cooper","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-08T21:00:07Z","title":"Mg II Absorption at 2<z<7 with Magellan/FIRE, III. Full Statistics of Absorption Towards 100 High-Redshift QSOs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.02829","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":"sha256:2fce725883c77a11a6cd85586e9f4e459a25bbad70d8b7756d718be8f39cff9f","target":"record","created_at":"2026-05-18T00:28:16Z","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":"1a83ec24631eb7ccda918af61b291752617167b7689e3a9ac6581e66eb79ccd1","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-12-08T21:00:07Z","title_canon_sha256":"27b205389d73038096d098948c4dd09b747d72b2d19ec67d62a7067a92108654"},"schema_version":"1.0","source":{"id":"1612.02829","kind":"arxiv","version":2}},"canonical_sha256":"5971d993cd541a3359c27a1416e02b8805dbaea2ba5475c01a4e41b9be178533","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5971d993cd541a3359c27a1416e02b8805dbaea2ba5475c01a4e41b9be178533","first_computed_at":"2026-05-18T00:28:16.345116Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:28:16.345116Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5NFnBJziVbC/Tu77Yqu1rwurNMWozXLPCfFdjuJOtGodxlRu6WyduCtvEWqMH/Li2JZUvsQBjZ18WHv4GgBeDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:28:16.345718Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.02829","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2fce725883c77a11a6cd85586e9f4e459a25bbad70d8b7756d718be8f39cff9f","sha256:255cecf8ae2da3b3cc71548224afc1b1d362610422956e750b9cb3143674c88b"],"state_sha256":"19663d6ab4718ec6cce070df5f37ef3b2d491f6ad87b458f92db2aef8a24be4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oNzZFOjsTYr/WnvKR1Sul0wAkNvV401LWZRI2e+TWeJuwqtcDx5FLKABEnJ4ncWfG26Ge+jGT0snCY/6S/zPAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T23:10:26.267509Z","bundle_sha256":"877fa791e0f688910265241156238941c0b2cfce215feac42db697e258efed10"}}