{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:QXN4IA4PA6LDNC4RIYYER3ZTQZ","short_pith_number":"pith:QXN4IA4P","canonical_record":{"source":{"id":"2607.20123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-22T13:26:39Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"21492edb96b6634ab2da9635e506b48ff5aa4c537d35f473319688b6f52d5a25","abstract_canon_sha256":"fc5c079dd2f26bf396690456aa78c1fba5e72ee69c1a00a7a937773b7cc1b746"},"schema_version":"1.0"},"canonical_sha256":"85dbc4038f0796368b91463048ef33867117aa57903bb49f6f2bd7242f51c3ad","source":{"kind":"arxiv","id":"2607.20123","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.20123","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"arxiv_version","alias_value":"2607.20123v1","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.20123","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_12","alias_value":"QXN4IA4PA6LD","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_16","alias_value":"QXN4IA4PA6LDNC4R","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_8","alias_value":"QXN4IA4P","created_at":"2026-07-23T01:25:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:QXN4IA4PA6LDNC4RIYYER3ZTQZ","target":"record","payload":{"canonical_record":{"source":{"id":"2607.20123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-22T13:26:39Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"21492edb96b6634ab2da9635e506b48ff5aa4c537d35f473319688b6f52d5a25","abstract_canon_sha256":"fc5c079dd2f26bf396690456aa78c1fba5e72ee69c1a00a7a937773b7cc1b746"},"schema_version":"1.0"},"canonical_sha256":"85dbc4038f0796368b91463048ef33867117aa57903bb49f6f2bd7242f51c3ad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-23T01:25:02.627963Z","signature_b64":"hufEPehrSVgPGRSEvJENfkhy8spW6amMVAbuX4MqOcfkFx662ptNRBozZ+nnxx3u0rRnVNB5kBs8Tg+oCiIECQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85dbc4038f0796368b91463048ef33867117aa57903bb49f6f2bd7242f51c3ad","last_reissued_at":"2026-07-23T01:25:02.627152Z","signature_status":"signed_v1","first_computed_at":"2026-07-23T01:25:02.627152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.20123","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":"2026-07-23T01:25:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GUui5GGBz7Qt3FIbqOKbZ0ZP+qkEM8AWbCd32NYwHxsTfWmYVQ6ogkQ1YQdP99J6S0VDnizayLNVVTNaoYXpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:05:02.342171Z"},"content_sha256":"824f200dc13a0478994f61e5b7865e29f63a21ab68eeabf3dd9193a611c62f35","schema_version":"1.0","event_id":"sha256:824f200dc13a0478994f61e5b7865e29f63a21ab68eeabf3dd9193a611c62f35"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:QXN4IA4PA6LDNC4RIYYER3ZTQZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling the HI-Halo Connection: Evolution, Scatter, and a Halo-based Prescription for 21-cm Mock Catalogs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Fabio Fontanot, Gabriella De Lucia, Lizhi Xie, Marta Spinelli, Michaela Hirschmann, Mohd Kamran","submitted_at":"2026-07-22T13:26:39Z","abstract_excerpt":"The redshifted 21-cm line of neutral hydrogen (HI) is a powerful tracer of large-scale structure, and post-reionization HI intensity mapping is emerging as a competitive cosmological probe whose interpretation requires a description of how HI populates galaxies and dark matter halos. We characterize the HI--halo mass relation, its redshift evolution, and its intrinsic scatter, identifying its secondary dependences. We use the updated GAlaxy Evolution and Assembly (GAEA) semi-analytic model, applied to the Millennium-I and Millennium-II simulations, to predict the HI mass function (HIMF) and th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.20123","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.20123/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-23T01:25:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Vsa3VRpXSjUl3maflB/rPQLnXbUlCgCR0DxEsWqmQG5EOzjC/cx2ucd5iGqViPRbmOEjLmMg8kErz669Sy/CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:05:02.342710Z"},"content_sha256":"e9353fdec9cb2beca13c42f10ee992256e10ca05efe30f5f932067ee05ec7777","schema_version":"1.0","event_id":"sha256:e9353fdec9cb2beca13c42f10ee992256e10ca05efe30f5f932067ee05ec7777"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/bundle.json","state_url":"https://pith.science/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/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":"2026-08-03T16:05:02Z","links":{"resolver":"https://pith.science/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ","bundle":"https://pith.science/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/bundle.json","state":"https://pith.science/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QXN4IA4PA6LDNC4RIYYER3ZTQZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QXN4IA4PA6LDNC4RIYYER3ZTQZ","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":"fc5c079dd2f26bf396690456aa78c1fba5e72ee69c1a00a7a937773b7cc1b746","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-22T13:26:39Z","title_canon_sha256":"21492edb96b6634ab2da9635e506b48ff5aa4c537d35f473319688b6f52d5a25"},"schema_version":"1.0","source":{"id":"2607.20123","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.20123","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"arxiv_version","alias_value":"2607.20123v1","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.20123","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_12","alias_value":"QXN4IA4PA6LD","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_16","alias_value":"QXN4IA4PA6LDNC4R","created_at":"2026-07-23T01:25:02Z"},{"alias_kind":"pith_short_8","alias_value":"QXN4IA4P","created_at":"2026-07-23T01:25:02Z"}],"graph_snapshots":[{"event_id":"sha256:e9353fdec9cb2beca13c42f10ee992256e10ca05efe30f5f932067ee05ec7777","target":"graph","created_at":"2026-07-23T01:25:02Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.20123/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The redshifted 21-cm line of neutral hydrogen (HI) is a powerful tracer of large-scale structure, and post-reionization HI intensity mapping is emerging as a competitive cosmological probe whose interpretation requires a description of how HI populates galaxies and dark matter halos. We characterize the HI--halo mass relation, its redshift evolution, and its intrinsic scatter, identifying its secondary dependences. We use the updated GAlaxy Evolution and Assembly (GAEA) semi-analytic model, applied to the Millennium-I and Millennium-II simulations, to predict the HI mass function (HIMF) and th","authors_text":"Fabio Fontanot, Gabriella De Lucia, Lizhi Xie, Marta Spinelli, Michaela Hirschmann, Mohd Kamran","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-22T13:26:39Z","title":"Modeling the HI-Halo Connection: Evolution, Scatter, and a Halo-based Prescription for 21-cm Mock Catalogs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.20123","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":"sha256:824f200dc13a0478994f61e5b7865e29f63a21ab68eeabf3dd9193a611c62f35","target":"record","created_at":"2026-07-23T01:25:02Z","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":"fc5c079dd2f26bf396690456aa78c1fba5e72ee69c1a00a7a937773b7cc1b746","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-22T13:26:39Z","title_canon_sha256":"21492edb96b6634ab2da9635e506b48ff5aa4c537d35f473319688b6f52d5a25"},"schema_version":"1.0","source":{"id":"2607.20123","kind":"arxiv","version":1}},"canonical_sha256":"85dbc4038f0796368b91463048ef33867117aa57903bb49f6f2bd7242f51c3ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85dbc4038f0796368b91463048ef33867117aa57903bb49f6f2bd7242f51c3ad","first_computed_at":"2026-07-23T01:25:02.627152Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-23T01:25:02.627152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hufEPehrSVgPGRSEvJENfkhy8spW6amMVAbuX4MqOcfkFx662ptNRBozZ+nnxx3u0rRnVNB5kBs8Tg+oCiIECQ==","signature_status":"signed_v1","signed_at":"2026-07-23T01:25:02.627963Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.20123","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:824f200dc13a0478994f61e5b7865e29f63a21ab68eeabf3dd9193a611c62f35","sha256:e9353fdec9cb2beca13c42f10ee992256e10ca05efe30f5f932067ee05ec7777"],"state_sha256":"cc735c28b1c6d572d64c63445f3c0877499fc0206495d458696e63a79791ea89"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OXMdYgAlO4W2KWg1nCkxDTUyYlyhi6v4LlvTUrb83dX1a/5I3mtXnkmV6awyREF+WPL2woGW979ONhhmj31fDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:05:02.348596Z","bundle_sha256":"5610d23367073fc347498b516d1ca565233c9ef684fa750fb1ef9a7237e93c31"}}