{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HCZRAXLXRPKTXJ5IMSCBSB6LDY","short_pith_number":"pith:HCZRAXLX","canonical_record":{"source":{"id":"1803.07077","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-19T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"ed2c9c8c476d7fc53f14a81a2f75767c58332c7f04cf56c529764e914d9cc893","abstract_canon_sha256":"3b4f8b2b7becfffa584173518ee82107161097f91117a36d7c0def4665457e09"},"schema_version":"1.0"},"canonical_sha256":"38b3105d778bd53ba7a864841907cb1e32aa87edc4411e434bf4f8409f51ab38","source":{"kind":"arxiv","id":"1803.07077","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07077","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07077v2","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07077","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"HCZRAXLXRPKT","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HCZRAXLXRPKTXJ5I","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HCZRAXLX","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HCZRAXLXRPKTXJ5IMSCBSB6LDY","target":"record","payload":{"canonical_record":{"source":{"id":"1803.07077","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-19T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"ed2c9c8c476d7fc53f14a81a2f75767c58332c7f04cf56c529764e914d9cc893","abstract_canon_sha256":"3b4f8b2b7becfffa584173518ee82107161097f91117a36d7c0def4665457e09"},"schema_version":"1.0"},"canonical_sha256":"38b3105d778bd53ba7a864841907cb1e32aa87edc4411e434bf4f8409f51ab38","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:09.497218Z","signature_b64":"J1mKn+NIsqrcxF+Ywj6tlZm9TEtJ0DBig7/XMgi4qOGacbEbi+hRn0jwWMpdqy14DZvRZb5PbYOZNA+zzFlpCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"38b3105d778bd53ba7a864841907cb1e32aa87edc4411e434bf4f8409f51ab38","last_reissued_at":"2026-05-18T00:09:09.496459Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:09.496459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.07077","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":"2026-05-18T00:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EHAKqOe2ejPEHyIAWZoXuK9ArOrhtYvNYD2bZ8m4dznOZsZpzjwSCNJnBrnkmdHVz1FVGwdSC7xNBGE3nA7+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:50:30.396611Z"},"content_sha256":"72e520d4d918ad880ba1c4d5bc92217b2060cb895220efeb7759f3220a654cde","schema_version":"1.0","event_id":"sha256:72e520d4d918ad880ba1c4d5bc92217b2060cb895220efeb7759f3220a654cde"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HCZRAXLXRPKTXJ5IMSCBSB6LDY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Synergies between intensity maps of hydrogen lines","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jos\\'e Fonseca, M\\'ario G. Santos, Roy Maartens","submitted_at":"2018-03-19T18:00:00Z","abstract_excerpt":"We study synergies between HI 21cm and H$\\alpha$ intensity map observations, focusing on SKA1-like and SPHEREx-like surveys. We forecast how well such a combination can measure features in the angular power spectrum on the largest scales, that arise from primordial non-Gaussianity and from general relativistic effects. For the first time we consider Doppler, Sachs-Wolfe and integrated SW effects separately. We confirm that the single-tracer surveys on their own cannot detect general relativistic effects and can constrain the non-Gaussianity parameter $f_{\\rm NL}$ only slightly better than Plan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07077","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":"2026-05-18T00:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"liDbIb/H0MazU21fuc0ALo5xknvRjQkdPGGZseiE0VBV2vAXLf89z5YlhJJalsYJyx1x15jCKV5oc57UtnA/Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:50:30.396957Z"},"content_sha256":"ec90008804e4b0789609167f60f4bddf8108204078308f692c1da535804c4be1","schema_version":"1.0","event_id":"sha256:ec90008804e4b0789609167f60f4bddf8108204078308f692c1da535804c4be1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/bundle.json","state_url":"https://pith.science/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/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":"2026-06-02T21:50:30Z","links":{"resolver":"https://pith.science/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY","bundle":"https://pith.science/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/bundle.json","state":"https://pith.science/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HCZRAXLXRPKTXJ5IMSCBSB6LDY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HCZRAXLXRPKTXJ5IMSCBSB6LDY","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":"3b4f8b2b7becfffa584173518ee82107161097f91117a36d7c0def4665457e09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-19T18:00:00Z","title_canon_sha256":"ed2c9c8c476d7fc53f14a81a2f75767c58332c7f04cf56c529764e914d9cc893"},"schema_version":"1.0","source":{"id":"1803.07077","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07077","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07077v2","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07077","created_at":"2026-05-18T00:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"HCZRAXLXRPKT","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HCZRAXLXRPKTXJ5I","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HCZRAXLX","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:ec90008804e4b0789609167f60f4bddf8108204078308f692c1da535804c4be1","target":"graph","created_at":"2026-05-18T00:09:09Z","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 study synergies between HI 21cm and H$\\alpha$ intensity map observations, focusing on SKA1-like and SPHEREx-like surveys. We forecast how well such a combination can measure features in the angular power spectrum on the largest scales, that arise from primordial non-Gaussianity and from general relativistic effects. For the first time we consider Doppler, Sachs-Wolfe and integrated SW effects separately. We confirm that the single-tracer surveys on their own cannot detect general relativistic effects and can constrain the non-Gaussianity parameter $f_{\\rm NL}$ only slightly better than Plan","authors_text":"Jos\\'e Fonseca, M\\'ario G. Santos, Roy Maartens","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-19T18:00:00Z","title":"Synergies between intensity maps of hydrogen lines"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07077","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":"sha256:72e520d4d918ad880ba1c4d5bc92217b2060cb895220efeb7759f3220a654cde","target":"record","created_at":"2026-05-18T00:09:09Z","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":"3b4f8b2b7becfffa584173518ee82107161097f91117a36d7c0def4665457e09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-19T18:00:00Z","title_canon_sha256":"ed2c9c8c476d7fc53f14a81a2f75767c58332c7f04cf56c529764e914d9cc893"},"schema_version":"1.0","source":{"id":"1803.07077","kind":"arxiv","version":2}},"canonical_sha256":"38b3105d778bd53ba7a864841907cb1e32aa87edc4411e434bf4f8409f51ab38","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"38b3105d778bd53ba7a864841907cb1e32aa87edc4411e434bf4f8409f51ab38","first_computed_at":"2026-05-18T00:09:09.496459Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:09.496459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J1mKn+NIsqrcxF+Ywj6tlZm9TEtJ0DBig7/XMgi4qOGacbEbi+hRn0jwWMpdqy14DZvRZb5PbYOZNA+zzFlpCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:09.497218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07077","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72e520d4d918ad880ba1c4d5bc92217b2060cb895220efeb7759f3220a654cde","sha256:ec90008804e4b0789609167f60f4bddf8108204078308f692c1da535804c4be1"],"state_sha256":"62713765c90e2ffdb3bae045a3ac4ff90cfc2d00c64a995341cafebdbdf9c0e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+c/YGXzHEq0Mvnr3DyO1Hv1vPmPsybvkreN4Mx1sgja1a4pdW0lvmbWVP/YjCtE2ysy0SXmRNvGin6gE+ZUAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:50:30.398937Z","bundle_sha256":"37bca41555fe67000cc01238347c30c82fe86019085260c3011cfa025ee3543f"}}