{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4RUGFMRT57M6QKOY27LQNDJHOK","short_pith_number":"pith:4RUGFMRT","canonical_record":{"source":{"id":"1801.02671","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-08T20:11:45Z","cross_cats_sorted":[],"title_canon_sha256":"35ead7e1e088214ba65950fc777b06f8eb7414c6d2bc85f9a4399e51e30d8975","abstract_canon_sha256":"79051a4ac3907a86ac33545e4c07764d71effa061040c42bce425d9d881cc9ff"},"schema_version":"1.0"},"canonical_sha256":"e46862b233efd9e829d8d7d7068d277298657570d5f06f010e684e0df8e71de6","source":{"kind":"arxiv","id":"1801.02671","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02671","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02671v2","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02671","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"pith_short_12","alias_value":"4RUGFMRT57M6","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4RUGFMRT57M6QKOY","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4RUGFMRT","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4RUGFMRT57M6QKOY27LQNDJHOK","target":"record","payload":{"canonical_record":{"source":{"id":"1801.02671","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-08T20:11:45Z","cross_cats_sorted":[],"title_canon_sha256":"35ead7e1e088214ba65950fc777b06f8eb7414c6d2bc85f9a4399e51e30d8975","abstract_canon_sha256":"79051a4ac3907a86ac33545e4c07764d71effa061040c42bce425d9d881cc9ff"},"schema_version":"1.0"},"canonical_sha256":"e46862b233efd9e829d8d7d7068d277298657570d5f06f010e684e0df8e71de6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:02.689686Z","signature_b64":"SxPnOtSS8aTOm6S591R7Tv1pwDorRhVpUBVKvd871dXArpw3m96npJQjZ2xej2/eEAk9/gNqWxq8641j9VydCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e46862b233efd9e829d8d7d7068d277298657570d5f06f010e684e0df8e71de6","last_reissued_at":"2026-05-18T00:19:02.688901Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:02.688901Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.02671","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":"2026-05-18T00:19:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jk+d7bfFP3oK7cXVoMtZzWws6Y4Hp1RAnsOk7JzqDfW+ymEKujsUzCWy2tMm1Ba+ENxhZW2hs4VOri02YlshCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T22:09:05.831099Z"},"content_sha256":"0cef53998c261fe676cea36c655a2e4fc0c98ba3e30412b0ee3c4cb85ea41efd","schema_version":"1.0","event_id":"sha256:0cef53998c261fe676cea36c655a2e4fc0c98ba3e30412b0ee3c4cb85ea41efd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4RUGFMRT57M6QKOY27LQNDJHOK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Absorber Model: the Halo-like model for the Lyman-alpha forest","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Matthew McQuinn, Vid Ir\\v{s}i\\v{c}","submitted_at":"2018-01-08T20:11:45Z","abstract_excerpt":"We present a semi-analytic model for the Lyman-$\\alpha$ forest that is inspired by the Halo Model. This model is built on the absorption line decomposition of the forest. Flux correlations are decomposed into those within each absorption line (the 1-absorber term) and those between separate lines (the 2-absorber term), treating the lines as biased tracers of the underlying matter fluctuations. While the nonlinear exponential mapping between optical depth and flux requires an infinite series of moments to calculate any statistic, we show that this series can be resumed (truncating at the desire"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02671","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":"2026-05-18T00:19:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ASvYOymQrwT/D6vDPDy6AW5uztz3Jh4ooxghOIpyIxw1nm4rMCqSsxmjURqYBLDJJkFKtVigAPZKzBGbokCtCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T22:09:05.831809Z"},"content_sha256":"6af3c841d1543d3efe9558ce1d77ef4f8c1e031a548ec757362ab2b5c37dba46","schema_version":"1.0","event_id":"sha256:6af3c841d1543d3efe9558ce1d77ef4f8c1e031a548ec757362ab2b5c37dba46"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RUGFMRT57M6QKOY27LQNDJHOK/bundle.json","state_url":"https://pith.science/pith/4RUGFMRT57M6QKOY27LQNDJHOK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RUGFMRT57M6QKOY27LQNDJHOK/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":"2026-06-07T22:09:05Z","links":{"resolver":"https://pith.science/pith/4RUGFMRT57M6QKOY27LQNDJHOK","bundle":"https://pith.science/pith/4RUGFMRT57M6QKOY27LQNDJHOK/bundle.json","state":"https://pith.science/pith/4RUGFMRT57M6QKOY27LQNDJHOK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RUGFMRT57M6QKOY27LQNDJHOK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4RUGFMRT57M6QKOY27LQNDJHOK","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":"79051a4ac3907a86ac33545e4c07764d71effa061040c42bce425d9d881cc9ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-08T20:11:45Z","title_canon_sha256":"35ead7e1e088214ba65950fc777b06f8eb7414c6d2bc85f9a4399e51e30d8975"},"schema_version":"1.0","source":{"id":"1801.02671","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02671","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02671v2","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02671","created_at":"2026-05-18T00:19:02Z"},{"alias_kind":"pith_short_12","alias_value":"4RUGFMRT57M6","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4RUGFMRT57M6QKOY","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4RUGFMRT","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:6af3c841d1543d3efe9558ce1d77ef4f8c1e031a548ec757362ab2b5c37dba46","target":"graph","created_at":"2026-05-18T00:19:02Z","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 a semi-analytic model for the Lyman-$\\alpha$ forest that is inspired by the Halo Model. This model is built on the absorption line decomposition of the forest. Flux correlations are decomposed into those within each absorption line (the 1-absorber term) and those between separate lines (the 2-absorber term), treating the lines as biased tracers of the underlying matter fluctuations. While the nonlinear exponential mapping between optical depth and flux requires an infinite series of moments to calculate any statistic, we show that this series can be resumed (truncating at the desire","authors_text":"Matthew McQuinn, Vid Ir\\v{s}i\\v{c}","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-08T20:11:45Z","title":"Absorber Model: the Halo-like model for the Lyman-alpha forest"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02671","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":"sha256:0cef53998c261fe676cea36c655a2e4fc0c98ba3e30412b0ee3c4cb85ea41efd","target":"record","created_at":"2026-05-18T00:19:02Z","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":"79051a4ac3907a86ac33545e4c07764d71effa061040c42bce425d9d881cc9ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-08T20:11:45Z","title_canon_sha256":"35ead7e1e088214ba65950fc777b06f8eb7414c6d2bc85f9a4399e51e30d8975"},"schema_version":"1.0","source":{"id":"1801.02671","kind":"arxiv","version":2}},"canonical_sha256":"e46862b233efd9e829d8d7d7068d277298657570d5f06f010e684e0df8e71de6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e46862b233efd9e829d8d7d7068d277298657570d5f06f010e684e0df8e71de6","first_computed_at":"2026-05-18T00:19:02.688901Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:02.688901Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SxPnOtSS8aTOm6S591R7Tv1pwDorRhVpUBVKvd871dXArpw3m96npJQjZ2xej2/eEAk9/gNqWxq8641j9VydCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:02.689686Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02671","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0cef53998c261fe676cea36c655a2e4fc0c98ba3e30412b0ee3c4cb85ea41efd","sha256:6af3c841d1543d3efe9558ce1d77ef4f8c1e031a548ec757362ab2b5c37dba46"],"state_sha256":"796af4d013a652f1c9c042eea9b37b47e4b8c51f5e7524500b7425d157c3b485"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AmKISndL66LUHkttA2lTuGvzuvqW8tL840q/fXgKX1T1eOorkTXkmVBh9cUG8dER+0aXZOxE6f6moX1xQ89ODQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T22:09:05.835888Z","bundle_sha256":"81484a814e4c228f452d04e722909c6a27eedfd714d079ce2b071f5d75b0fd52"}}