{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VAET2XOSUFEZOZQCILBOBB6FXK","short_pith_number":"pith:VAET2XOS","canonical_record":{"source":{"id":"1812.01636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-04T19:19:34Z","cross_cats_sorted":[],"title_canon_sha256":"cf787c9e8531e7e9520b5066fc2655b22bd96f9963e19c1e6e4dc51d318b0f92","abstract_canon_sha256":"3e7d6b6853ad9065522da0897edbf184e7accdcf5d7aef601af77479dc4b177b"},"schema_version":"1.0"},"canonical_sha256":"a8093d5dd2a14997660242c2e087c5ba90e676c335960ffac69e364ace78dce2","source":{"kind":"arxiv","id":"1812.01636","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01636","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01636v2","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01636","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"pith_short_12","alias_value":"VAET2XOSUFEZ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VAET2XOSUFEZOZQC","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VAET2XOS","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VAET2XOSUFEZOZQCILBOBB6FXK","target":"record","payload":{"canonical_record":{"source":{"id":"1812.01636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-04T19:19:34Z","cross_cats_sorted":[],"title_canon_sha256":"cf787c9e8531e7e9520b5066fc2655b22bd96f9963e19c1e6e4dc51d318b0f92","abstract_canon_sha256":"3e7d6b6853ad9065522da0897edbf184e7accdcf5d7aef601af77479dc4b177b"},"schema_version":"1.0"},"canonical_sha256":"a8093d5dd2a14997660242c2e087c5ba90e676c335960ffac69e364ace78dce2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:39.099312Z","signature_b64":"UolSUPlCpSONfEqxveMOMRjB38jZUhfxuBfAIzHteV/LKTp8/6ra/ERotzezMoqqE51xWsV+3veLb1/SkzYEDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8093d5dd2a14997660242c2e087c5ba90e676c335960ffac69e364ace78dce2","last_reissued_at":"2026-05-17T23:51:39.098460Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:39.098460Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.01636","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":"2026-05-17T23:51:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rUSosqC0JacywISsrRMK7u9I/Q0PVq2++r8nmub4T567FGOkf8YV2a7Ag0lp0coLBGEP07X2NnBqCTGQSeIxBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:53:52.650137Z"},"content_sha256":"2174d76fea5486e3083a71cf9a29908f1147660dcb445fee2852943270a36ea0","schema_version":"1.0","event_id":"sha256:2174d76fea5486e3083a71cf9a29908f1147660dcb445fee2852943270a36ea0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VAET2XOSUFEZOZQCILBOBB6FXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring ISW with next-generation radio surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Mario Ballardini, Roy Maartens","submitted_at":"2018-12-04T19:19:34Z","abstract_excerpt":"The late-time integrated Sachs-Wolfe (ISW) signal in the CMB temperature anisotropies is an important probe of dark energy when it can be detected by cross-correlation with large-scale structure surveys. Because of their huge sky area, surveys in the radio are well-suited to ISW detection. We show that 21cm intensity mapping and radio continuum surveys with the SKA in Phase~1 promise a $\\sim5\\sigma$ detection if we use tomography, with a similar forecast for the precursor EMU survey. In SKA Phase~2, the 21cm galaxy redshift survey and the continuum survey could deliver a $\\sim6\\sigma$ detectio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01636","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":"2026-05-17T23:51:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GWsUWZvmHPbY5gE7/dScbhkH5epvu3T9EbMdmj/U+xgI1WXqtbqav2Fgz8VfCRQfHncPMYNjEWq9zf9RmxRmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:53:52.650766Z"},"content_sha256":"b8f27323ff25cd3494ed099ebba517f3ebf34626e482565c9954fde0d3ea4f49","schema_version":"1.0","event_id":"sha256:b8f27323ff25cd3494ed099ebba517f3ebf34626e482565c9954fde0d3ea4f49"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VAET2XOSUFEZOZQCILBOBB6FXK/bundle.json","state_url":"https://pith.science/pith/VAET2XOSUFEZOZQCILBOBB6FXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VAET2XOSUFEZOZQCILBOBB6FXK/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":"2026-06-06T16:53:52Z","links":{"resolver":"https://pith.science/pith/VAET2XOSUFEZOZQCILBOBB6FXK","bundle":"https://pith.science/pith/VAET2XOSUFEZOZQCILBOBB6FXK/bundle.json","state":"https://pith.science/pith/VAET2XOSUFEZOZQCILBOBB6FXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VAET2XOSUFEZOZQCILBOBB6FXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VAET2XOSUFEZOZQCILBOBB6FXK","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":"3e7d6b6853ad9065522da0897edbf184e7accdcf5d7aef601af77479dc4b177b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-04T19:19:34Z","title_canon_sha256":"cf787c9e8531e7e9520b5066fc2655b22bd96f9963e19c1e6e4dc51d318b0f92"},"schema_version":"1.0","source":{"id":"1812.01636","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01636","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01636v2","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01636","created_at":"2026-05-17T23:51:39Z"},{"alias_kind":"pith_short_12","alias_value":"VAET2XOSUFEZ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VAET2XOSUFEZOZQC","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VAET2XOS","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:b8f27323ff25cd3494ed099ebba517f3ebf34626e482565c9954fde0d3ea4f49","target":"graph","created_at":"2026-05-17T23:51:39Z","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":"The late-time integrated Sachs-Wolfe (ISW) signal in the CMB temperature anisotropies is an important probe of dark energy when it can be detected by cross-correlation with large-scale structure surveys. Because of their huge sky area, surveys in the radio are well-suited to ISW detection. We show that 21cm intensity mapping and radio continuum surveys with the SKA in Phase~1 promise a $\\sim5\\sigma$ detection if we use tomography, with a similar forecast for the precursor EMU survey. In SKA Phase~2, the 21cm galaxy redshift survey and the continuum survey could deliver a $\\sim6\\sigma$ detectio","authors_text":"Mario Ballardini, Roy Maartens","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-04T19:19:34Z","title":"Measuring ISW with next-generation radio surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01636","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":"sha256:2174d76fea5486e3083a71cf9a29908f1147660dcb445fee2852943270a36ea0","target":"record","created_at":"2026-05-17T23:51:39Z","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":"3e7d6b6853ad9065522da0897edbf184e7accdcf5d7aef601af77479dc4b177b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-04T19:19:34Z","title_canon_sha256":"cf787c9e8531e7e9520b5066fc2655b22bd96f9963e19c1e6e4dc51d318b0f92"},"schema_version":"1.0","source":{"id":"1812.01636","kind":"arxiv","version":2}},"canonical_sha256":"a8093d5dd2a14997660242c2e087c5ba90e676c335960ffac69e364ace78dce2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8093d5dd2a14997660242c2e087c5ba90e676c335960ffac69e364ace78dce2","first_computed_at":"2026-05-17T23:51:39.098460Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:39.098460Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UolSUPlCpSONfEqxveMOMRjB38jZUhfxuBfAIzHteV/LKTp8/6ra/ERotzezMoqqE51xWsV+3veLb1/SkzYEDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:39.099312Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.01636","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2174d76fea5486e3083a71cf9a29908f1147660dcb445fee2852943270a36ea0","sha256:b8f27323ff25cd3494ed099ebba517f3ebf34626e482565c9954fde0d3ea4f49"],"state_sha256":"6faa228d8bb1f56450d831a0838fc6727b933ba4965cefe68a611032c2e36194"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/U1gw71k3Fitawb7oV1zSvMEYeGHC8ReTUdqYHrf2OBkE5MuxKiOItc8VK/WgdZVw9K9HKyhSDKEUEVTNzVJAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T16:53:52.653625Z","bundle_sha256":"a1c407e748aa4837704b9ae4db18df9b4999c6e672905cd9ab6e0cf46caa5dd3"}}