{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:FWG5DKLA6G76NIAANYYULNRCSX","short_pith_number":"pith:FWG5DKLA","canonical_record":{"source":{"id":"1501.06576","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-26T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"b0857a97715641d98a074abfd3950699629ff9d9b5eeb60d1e50073d7b7434c3","abstract_canon_sha256":"8b59eb15bedf36004e8ec4390f86f3ff3e89a7bd3ffe65a1711fb8badb43934f"},"schema_version":"1.0"},"canonical_sha256":"2d8dd1a960f1bfe6a0006e3145b62295cb4ca02cbe0cc58aeb43690528751451","source":{"kind":"arxiv","id":"1501.06576","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06576","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06576v2","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06576","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"FWG5DKLA6G76","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"FWG5DKLA6G76NIAA","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"FWG5DKLA","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:FWG5DKLA6G76NIAANYYULNRCSX","target":"record","payload":{"canonical_record":{"source":{"id":"1501.06576","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-26T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"b0857a97715641d98a074abfd3950699629ff9d9b5eeb60d1e50073d7b7434c3","abstract_canon_sha256":"8b59eb15bedf36004e8ec4390f86f3ff3e89a7bd3ffe65a1711fb8badb43934f"},"schema_version":"1.0"},"canonical_sha256":"2d8dd1a960f1bfe6a0006e3145b62295cb4ca02cbe0cc58aeb43690528751451","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:08.503557Z","signature_b64":"WChmV+jIS7M7nbR1mnu5xXdq4Bti2SYolPymvGJECbgMsBly+UypSW8r2dI9aZ9ASI/y/mfEm7erGegE02YICg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d8dd1a960f1bfe6a0006e3145b62295cb4ca02cbe0cc58aeb43690528751451","last_reissued_at":"2026-05-18T01:41:08.502987Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:08.502987Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.06576","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":"2026-05-18T01:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sKYStx2xf6SRX8AtHdZh+P6z01q/gZmCi0K9Oztdn78fvCXwj3M1x4B4VEepzISK6YXApKThsoRQ7Luvko1oDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T03:14:37.837913Z"},"content_sha256":"1e626fe610362e1d73daf23c9fcb2dc4808a034ac75b426078771b2f5f7f3cb4","schema_version":"1.0","event_id":"sha256:1e626fe610362e1d73daf23c9fcb2dc4808a034ac75b426078771b2f5f7f3cb4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:FWG5DKLA6G76NIAANYYULNRCSX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrei Mesinger, Bradley Greig","submitted_at":"2015-01-26T21:00:12Z","abstract_excerpt":"We introduce 21CMMC: a parallelized, Monte Carlo Markov Chain analysis tool, incorporating the epoch of reionization (EoR) seminumerical simulation 21CMFAST. 21CMMC estimates astrophysical parameter constraints from 21 cm EoR experiments, accommodating a variety of EoR models, as well as priors on model parameters and the reionization history. To illustrate its utility, we consider two different EoR scenarios, one with a single population of galaxies (with a mass-independent ionizing efficiency) and a second, more general model with two different, feedback-regulated populations (each with mass"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06576","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":"2026-05-18T01:41:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CXl1VZB08nzFRkD6g5woQg8Q2Uj5e+fHBVqpu/sIb16hm2iEh7RabRgHdHUrkRfeVrF2rkAPbt9lxpd8lmTkAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T03:14:37.838597Z"},"content_sha256":"eeae666dbc938742173910238717de9fbbcf6595abbdf5d5931ecfe739322be4","schema_version":"1.0","event_id":"sha256:eeae666dbc938742173910238717de9fbbcf6595abbdf5d5931ecfe739322be4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FWG5DKLA6G76NIAANYYULNRCSX/bundle.json","state_url":"https://pith.science/pith/FWG5DKLA6G76NIAANYYULNRCSX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FWG5DKLA6G76NIAANYYULNRCSX/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":"2026-06-08T03:14:37Z","links":{"resolver":"https://pith.science/pith/FWG5DKLA6G76NIAANYYULNRCSX","bundle":"https://pith.science/pith/FWG5DKLA6G76NIAANYYULNRCSX/bundle.json","state":"https://pith.science/pith/FWG5DKLA6G76NIAANYYULNRCSX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FWG5DKLA6G76NIAANYYULNRCSX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FWG5DKLA6G76NIAANYYULNRCSX","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":"8b59eb15bedf36004e8ec4390f86f3ff3e89a7bd3ffe65a1711fb8badb43934f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-26T21:00:12Z","title_canon_sha256":"b0857a97715641d98a074abfd3950699629ff9d9b5eeb60d1e50073d7b7434c3"},"schema_version":"1.0","source":{"id":"1501.06576","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06576","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06576v2","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06576","created_at":"2026-05-18T01:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"FWG5DKLA6G76","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"FWG5DKLA6G76NIAA","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"FWG5DKLA","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:eeae666dbc938742173910238717de9fbbcf6595abbdf5d5931ecfe739322be4","target":"graph","created_at":"2026-05-18T01:41:08Z","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 introduce 21CMMC: a parallelized, Monte Carlo Markov Chain analysis tool, incorporating the epoch of reionization (EoR) seminumerical simulation 21CMFAST. 21CMMC estimates astrophysical parameter constraints from 21 cm EoR experiments, accommodating a variety of EoR models, as well as priors on model parameters and the reionization history. To illustrate its utility, we consider two different EoR scenarios, one with a single population of galaxies (with a mass-independent ionizing efficiency) and a second, more general model with two different, feedback-regulated populations (each with mass","authors_text":"Andrei Mesinger, Bradley Greig","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-26T21:00:12Z","title":"21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06576","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":"sha256:1e626fe610362e1d73daf23c9fcb2dc4808a034ac75b426078771b2f5f7f3cb4","target":"record","created_at":"2026-05-18T01:41:08Z","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":"8b59eb15bedf36004e8ec4390f86f3ff3e89a7bd3ffe65a1711fb8badb43934f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-01-26T21:00:12Z","title_canon_sha256":"b0857a97715641d98a074abfd3950699629ff9d9b5eeb60d1e50073d7b7434c3"},"schema_version":"1.0","source":{"id":"1501.06576","kind":"arxiv","version":2}},"canonical_sha256":"2d8dd1a960f1bfe6a0006e3145b62295cb4ca02cbe0cc58aeb43690528751451","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d8dd1a960f1bfe6a0006e3145b62295cb4ca02cbe0cc58aeb43690528751451","first_computed_at":"2026-05-18T01:41:08.502987Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:08.502987Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WChmV+jIS7M7nbR1mnu5xXdq4Bti2SYolPymvGJECbgMsBly+UypSW8r2dI9aZ9ASI/y/mfEm7erGegE02YICg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:08.503557Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.06576","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e626fe610362e1d73daf23c9fcb2dc4808a034ac75b426078771b2f5f7f3cb4","sha256:eeae666dbc938742173910238717de9fbbcf6595abbdf5d5931ecfe739322be4"],"state_sha256":"2a473573a77392d6c8cc907b2f2baf0b37f58e2ebba2b239311a2207ed960070"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UAYvalVg+ATQlW94EAr/t3FFu5Yfl0mP2Ae4gO87zMSHlHyAV30DtrNmnmNxinrS/1vxZcyu+MV4BZg7en5SAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T03:14:37.842142Z","bundle_sha256":"54266b7729fa3cb1661489c4fd84e4e9435cc50e525ace6a2b8aca1aad45f739"}}