{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OJOHQN52VNDWVHNHNMBQX6SNUV","short_pith_number":"pith:OJOHQN52","canonical_record":{"source":{"id":"1710.03286","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-10-09T19:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"a1afcef2e88bdfad2bbc1cd785917fe72a77ed3a0050af3f17c43b46c9fdcb92","abstract_canon_sha256":"2759741a4d034b9f26270ca5ed5401f5ae648502a8711205307d0abd1d4193eb"},"schema_version":"1.0"},"canonical_sha256":"725c7837baab476a9da76b030bfa4da57526354e277c6282571bdfefbd1534ca","source":{"kind":"arxiv","id":"1710.03286","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.03286","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"arxiv_version","alias_value":"1710.03286v1","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.03286","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"pith_short_12","alias_value":"OJOHQN52VNDW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OJOHQN52VNDWVHNH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OJOHQN52","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OJOHQN52VNDWVHNHNMBQX6SNUV","target":"record","payload":{"canonical_record":{"source":{"id":"1710.03286","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-10-09T19:50:24Z","cross_cats_sorted":[],"title_canon_sha256":"a1afcef2e88bdfad2bbc1cd785917fe72a77ed3a0050af3f17c43b46c9fdcb92","abstract_canon_sha256":"2759741a4d034b9f26270ca5ed5401f5ae648502a8711205307d0abd1d4193eb"},"schema_version":"1.0"},"canonical_sha256":"725c7837baab476a9da76b030bfa4da57526354e277c6282571bdfefbd1534ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:10.183480Z","signature_b64":"qqqUXQz6MQPnjeriS6W8oroqtKy5DTQQLflbDNzUoGjFofJdTUNl0Ogtszmyjc34C7/sgCSFxZOQqeZ4OQAtBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"725c7837baab476a9da76b030bfa4da57526354e277c6282571bdfefbd1534ca","last_reissued_at":"2026-05-17T23:59:10.182699Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:10.182699Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.03286","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":"2026-05-17T23:59:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h2KSp6NIaXglltsOApSK7GVAuBI/YGcm4ONp57Htd61so66b3jzqxXpvd1hYBmGh6lGHRfN7N+oVMwY2N5oQAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T02:16:57.063965Z"},"content_sha256":"d4b31c38c0c49104c537e25f7243c02a4336271d564da22604fe0da017bbcf11","schema_version":"1.0","event_id":"sha256:d4b31c38c0c49104c537e25f7243c02a4336271d564da22604fe0da017bbcf11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OJOHQN52VNDWVHNHNMBQX6SNUV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Helium Reionization Simulations. III. The Helium Lyman-$\\alpha$ Forest","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Hy Trac, Paul La Plante, Renyue Cen, Rupert Croft","submitted_at":"2017-10-09T19:50:24Z","abstract_excerpt":"In La Plante et al. (2017), we presented a new suite of hydrodynamic simulations with the aim of accurately capturing the process of helium II reionization. In this paper, we discuss the observational signatures present in the He II Ly$\\alpha$ forest. We show that the effective optical depth of the volume $\\tau_\\mathrm{eff}$ is not sufficient for capturing the ionization state of helium II, due to the large variance inherent in sightlines. However, the He II flux PDF can be used to determine the timing of helium II reionization. The amplitude of the one-dimensional flux power spectrum can also"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.03286","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":"2026-05-17T23:59:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b+EeoI3QeCFXV8F2v8ZhfDYdS7bKH4WrRC2dUVntiafN4klgNOIObRtxFlleI7FRT00J47mxPDt9yiYkrouvBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T02:16:57.064507Z"},"content_sha256":"5962c207b102798733858ffc2290d7ae25a48aea33109e24b2e30969392b2efe","schema_version":"1.0","event_id":"sha256:5962c207b102798733858ffc2290d7ae25a48aea33109e24b2e30969392b2efe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/bundle.json","state_url":"https://pith.science/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/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":"2026-06-06T02:16:57Z","links":{"resolver":"https://pith.science/pith/OJOHQN52VNDWVHNHNMBQX6SNUV","bundle":"https://pith.science/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/bundle.json","state":"https://pith.science/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJOHQN52VNDWVHNHNMBQX6SNUV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OJOHQN52VNDWVHNHNMBQX6SNUV","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":"2759741a4d034b9f26270ca5ed5401f5ae648502a8711205307d0abd1d4193eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-10-09T19:50:24Z","title_canon_sha256":"a1afcef2e88bdfad2bbc1cd785917fe72a77ed3a0050af3f17c43b46c9fdcb92"},"schema_version":"1.0","source":{"id":"1710.03286","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.03286","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"arxiv_version","alias_value":"1710.03286v1","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.03286","created_at":"2026-05-17T23:59:10Z"},{"alias_kind":"pith_short_12","alias_value":"OJOHQN52VNDW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OJOHQN52VNDWVHNH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OJOHQN52","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:5962c207b102798733858ffc2290d7ae25a48aea33109e24b2e30969392b2efe","target":"graph","created_at":"2026-05-17T23:59:10Z","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":"In La Plante et al. (2017), we presented a new suite of hydrodynamic simulations with the aim of accurately capturing the process of helium II reionization. In this paper, we discuss the observational signatures present in the He II Ly$\\alpha$ forest. We show that the effective optical depth of the volume $\\tau_\\mathrm{eff}$ is not sufficient for capturing the ionization state of helium II, due to the large variance inherent in sightlines. However, the He II flux PDF can be used to determine the timing of helium II reionization. The amplitude of the one-dimensional flux power spectrum can also","authors_text":"Hy Trac, Paul La Plante, Renyue Cen, Rupert Croft","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-10-09T19:50:24Z","title":"Helium Reionization Simulations. III. The Helium Lyman-$\\alpha$ Forest"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.03286","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:d4b31c38c0c49104c537e25f7243c02a4336271d564da22604fe0da017bbcf11","target":"record","created_at":"2026-05-17T23:59:10Z","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":"2759741a4d034b9f26270ca5ed5401f5ae648502a8711205307d0abd1d4193eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-10-09T19:50:24Z","title_canon_sha256":"a1afcef2e88bdfad2bbc1cd785917fe72a77ed3a0050af3f17c43b46c9fdcb92"},"schema_version":"1.0","source":{"id":"1710.03286","kind":"arxiv","version":1}},"canonical_sha256":"725c7837baab476a9da76b030bfa4da57526354e277c6282571bdfefbd1534ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"725c7837baab476a9da76b030bfa4da57526354e277c6282571bdfefbd1534ca","first_computed_at":"2026-05-17T23:59:10.182699Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:10.182699Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qqqUXQz6MQPnjeriS6W8oroqtKy5DTQQLflbDNzUoGjFofJdTUNl0Ogtszmyjc34C7/sgCSFxZOQqeZ4OQAtBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:10.183480Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.03286","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4b31c38c0c49104c537e25f7243c02a4336271d564da22604fe0da017bbcf11","sha256:5962c207b102798733858ffc2290d7ae25a48aea33109e24b2e30969392b2efe"],"state_sha256":"e68d3cc06bdbfee0de194ffca5cedb15a9bc9a6ae899c31dba0fa1c660242618"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yp+lCEYkNSqSIpD+PVhGLADXr0SRDugfhD0XFJzJFFuYOdLwPwm2JZlMmaLVockNXWEfWpMD0bUJd2BaBZpNCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T02:16:57.067575Z","bundle_sha256":"a658360ef3ede7c0fdd4697bfe609cc9a21e37ba53d110ef64e5f74e7d138ff3"}}