{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NQA7EX6CDPWGVIWVTQHDWAPROG","short_pith_number":"pith:NQA7EX6C","canonical_record":{"source":{"id":"1708.01698","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-08-05T02:04:33Z","cross_cats_sorted":[],"title_canon_sha256":"e2ec7a4f45956c7e464ad955c3d658feba9116fd3c8692dd95645c6dca977f61","abstract_canon_sha256":"0e32ad98f93e34d2c8136b9d31a7f40b9f41910649fba01b011333f3d149d1e2"},"schema_version":"1.0"},"canonical_sha256":"6c01f25fc21bec6aa2d59c0e3b01f1719042dcc2bfea2eb7ffa6e582535de75b","source":{"kind":"arxiv","id":"1708.01698","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.01698","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1708.01698v1","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.01698","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"NQA7EX6CDPWG","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NQA7EX6CDPWGVIWV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NQA7EX6C","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NQA7EX6CDPWGVIWVTQHDWAPROG","target":"record","payload":{"canonical_record":{"source":{"id":"1708.01698","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-08-05T02:04:33Z","cross_cats_sorted":[],"title_canon_sha256":"e2ec7a4f45956c7e464ad955c3d658feba9116fd3c8692dd95645c6dca977f61","abstract_canon_sha256":"0e32ad98f93e34d2c8136b9d31a7f40b9f41910649fba01b011333f3d149d1e2"},"schema_version":"1.0"},"canonical_sha256":"6c01f25fc21bec6aa2d59c0e3b01f1719042dcc2bfea2eb7ffa6e582535de75b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:32.529480Z","signature_b64":"yZVHG+aQxLUH2XBBkVSMv1Ufqx+jAPEwPgmHRYVTtspt056k+9qYRQkeUuWONaAf4Tsioy9QRlQBEPMx1W8FBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c01f25fc21bec6aa2d59c0e3b01f1719042dcc2bfea2eb7ffa6e582535de75b","last_reissued_at":"2026-05-18T00:03:32.528983Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:32.528983Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.01698","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":"2026-05-18T00:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uFlR4jxSnNA9wOFqNSVxnVRE4ZWLBFH01+KjDUqMYlddg6W3StghSX5+4hBXwMO4ZQOCNaF01nTN7J1U7pNzAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:43:25.195671Z"},"content_sha256":"103abc076757b11bfce14c3f2386ed0a4a66c24ea4af335d950451bc992a21d5","schema_version":"1.0","event_id":"sha256:103abc076757b11bfce14c3f2386ed0a4a66c24ea4af335d950451bc992a21d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NQA7EX6CDPWGVIWVTQHDWAPROG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Integrated HI emission in galaxy groups and clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jian Fu, Mei Ai, Ming Zhu","submitted_at":"2017-08-05T02:04:33Z","abstract_excerpt":"The integrated HI emission from hierarchical structures such as groups and clusters of galaxies can be detected by FAST at intermediate redshifts. Here we propose to use FAST to study the evolution of the global HI content of clusters and groups over cosmic time by measuring their integrated HI emissions. We use the Virgo cluster as an example to estimate the detection limit of FAST, and have estimated the integration time to detect a Virgo type cluster at different redshifts (from z=0.1 to z=1.5). We have also employed a semi-analytic model (SAM) to simulate the evolution of HI contents in ga"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.01698","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":"2026-05-18T00:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hVpQLxULeEh2VasSL+VjFaoZ4O7aXMZqTVmRjnSFG96Ej7buTssQDEfowQlq5oDL9MGx/eJnYSroIL8PMa+cAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:43:25.196018Z"},"content_sha256":"b0809666112fc30c7ec01d155df4d53182c67c3976a29fe0ff36de58afca93c2","schema_version":"1.0","event_id":"sha256:b0809666112fc30c7ec01d155df4d53182c67c3976a29fe0ff36de58afca93c2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/bundle.json","state_url":"https://pith.science/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/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":"2026-06-02T04:43:25Z","links":{"resolver":"https://pith.science/pith/NQA7EX6CDPWGVIWVTQHDWAPROG","bundle":"https://pith.science/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/bundle.json","state":"https://pith.science/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NQA7EX6CDPWGVIWVTQHDWAPROG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NQA7EX6CDPWGVIWVTQHDWAPROG","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":"0e32ad98f93e34d2c8136b9d31a7f40b9f41910649fba01b011333f3d149d1e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-08-05T02:04:33Z","title_canon_sha256":"e2ec7a4f45956c7e464ad955c3d658feba9116fd3c8692dd95645c6dca977f61"},"schema_version":"1.0","source":{"id":"1708.01698","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.01698","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1708.01698v1","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.01698","created_at":"2026-05-18T00:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"NQA7EX6CDPWG","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NQA7EX6CDPWGVIWV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NQA7EX6C","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:b0809666112fc30c7ec01d155df4d53182c67c3976a29fe0ff36de58afca93c2","target":"graph","created_at":"2026-05-18T00:03:32Z","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 integrated HI emission from hierarchical structures such as groups and clusters of galaxies can be detected by FAST at intermediate redshifts. Here we propose to use FAST to study the evolution of the global HI content of clusters and groups over cosmic time by measuring their integrated HI emissions. We use the Virgo cluster as an example to estimate the detection limit of FAST, and have estimated the integration time to detect a Virgo type cluster at different redshifts (from z=0.1 to z=1.5). We have also employed a semi-analytic model (SAM) to simulate the evolution of HI contents in ga","authors_text":"Jian Fu, Mei Ai, Ming Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-08-05T02:04:33Z","title":"Integrated HI emission in galaxy groups and clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.01698","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":"sha256:103abc076757b11bfce14c3f2386ed0a4a66c24ea4af335d950451bc992a21d5","target":"record","created_at":"2026-05-18T00:03:32Z","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":"0e32ad98f93e34d2c8136b9d31a7f40b9f41910649fba01b011333f3d149d1e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-08-05T02:04:33Z","title_canon_sha256":"e2ec7a4f45956c7e464ad955c3d658feba9116fd3c8692dd95645c6dca977f61"},"schema_version":"1.0","source":{"id":"1708.01698","kind":"arxiv","version":1}},"canonical_sha256":"6c01f25fc21bec6aa2d59c0e3b01f1719042dcc2bfea2eb7ffa6e582535de75b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c01f25fc21bec6aa2d59c0e3b01f1719042dcc2bfea2eb7ffa6e582535de75b","first_computed_at":"2026-05-18T00:03:32.528983Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:32.528983Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yZVHG+aQxLUH2XBBkVSMv1Ufqx+jAPEwPgmHRYVTtspt056k+9qYRQkeUuWONaAf4Tsioy9QRlQBEPMx1W8FBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:32.529480Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.01698","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:103abc076757b11bfce14c3f2386ed0a4a66c24ea4af335d950451bc992a21d5","sha256:b0809666112fc30c7ec01d155df4d53182c67c3976a29fe0ff36de58afca93c2"],"state_sha256":"2121676ec03c60a5ab5aa922fd92d7f85ae6efa9741d8f1081f9ffca1eb305e2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d2oVJLoN2jPLiAlzohnlGjAxHXaB5wvQOJKqgI9OHFUgM1Zs2M4VZ+BlCo5CPzizDmA4VnBjUog6/g9InDcsCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T04:43:25.198489Z","bundle_sha256":"f3c6a2fc26dfb98fcb432b7a2ea8dafcc12310b13d396809f4c9b4a6c73180ae"}}