{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:KPSCN34PPBDU5QJJGBEIHKLDUX","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":"83dcb711c858d6001e29e831a9749e46f8b24ae6598ad2b368955e2efa33cfe7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-10T20:00:01Z","title_canon_sha256":"6fe69117e7900bb9ac920c9c5591197483d60bba1f01976d449329fcec222ae7"},"schema_version":"1.0","source":{"id":"1607.02779","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02779","created_at":"2026-05-18T00:59:24Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02779v2","created_at":"2026-05-18T00:59:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02779","created_at":"2026-05-18T00:59:24Z"},{"alias_kind":"pith_short_12","alias_value":"KPSCN34PPBDU","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KPSCN34PPBDU5QJJ","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KPSCN34P","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:3b6046041f0035d6ad09d4f95fb47d4727a723221ad2b6421e9a6f728e34f77c","target":"graph","created_at":"2026-05-18T00:59:24Z","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":"Understanding properties of the first sources in the Universe using the redshifted \\HI ~21-cm signal is one of the major aims of present and upcoming low-frequency experiments. We investigate the possibility of imaging the redshifted 21-cm pattern around the first sources during the cosmic dawn using the SKA1-low. We model the \\HI ~21-cm image maps, appropriate for the SKA1-low, around the first sources consisting of stars and X-ray sources within galaxies. In addition to the system noise, we account also for the astrophysical foregrounds by adding them to the signal maps. We find that after s","authors_text":"India), Kanan K. Datta (Presidency University, Raghunath Ghara (NCRA-TIFR, Samir Choudhuri (IIT Kharagpur, T. Roy Choudhury (NCRA-TIFR)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-10T20:00:01Z","title":"Imaging the redshifted 21-cm pattern around the first sources during the cosmic dawn using the SKA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02779","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":"sha256:3e1129180c55db63cd5223c175e4f5df91fb5c170a56dcf3b2faea9335a8c361","target":"record","created_at":"2026-05-18T00:59:24Z","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":"83dcb711c858d6001e29e831a9749e46f8b24ae6598ad2b368955e2efa33cfe7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-10T20:00:01Z","title_canon_sha256":"6fe69117e7900bb9ac920c9c5591197483d60bba1f01976d449329fcec222ae7"},"schema_version":"1.0","source":{"id":"1607.02779","kind":"arxiv","version":2}},"canonical_sha256":"53e426ef8f78474ec129304883a963a5fc59e1233491d95b3b3920b096cf77dd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"53e426ef8f78474ec129304883a963a5fc59e1233491d95b3b3920b096cf77dd","first_computed_at":"2026-05-18T00:59:24.467025Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:24.467025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T6Nw5/mF0qjeLRm9PGyxkkxhEz14wV01PXJgD1I65hK3VeXV5//k5AJH1c/LshL8ks48P5XWwSWkrtsSQlQ2DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:24.467613Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02779","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e1129180c55db63cd5223c175e4f5df91fb5c170a56dcf3b2faea9335a8c361","sha256:3b6046041f0035d6ad09d4f95fb47d4727a723221ad2b6421e9a6f728e34f77c"],"state_sha256":"6279fcc25b620e34b52d4b8b260d7d6e6dec0252eb22aca9e11bd592e9682a61"}