{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:ZARTAAPJ3SCULPA6YQQPL646B6","short_pith_number":"pith:ZARTAAPJ","schema_version":"1.0","canonical_sha256":"c8233001e9dc8545bc1ec420f5fb9e0fbe0e368a3290ce3ccb86759172555af8","source":{"kind":"arxiv","id":"2105.06773","version":1},"attestation_state":"computed","paper":{"title":"Giant Metrewave Radio Telescope Detection of HI 21 cm Emission from Star-forming Galaxies at $z \\approx 1.3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aditya Chowdhury, Barnali Das, K.S. Dwarakanath, Nissim Kanekar, Shiv Sethi","submitted_at":"2021-05-14T11:32:46Z","abstract_excerpt":"We report a $\\approx 400$-hour Giant Metrewave Radio Telescope (GMRT) search for HI 21 cm emission from star-forming galaxies at $z = 1.18-1.39$ in seven fields of the DEEP2 Galaxy Survey. Including data from an earlier 60-hour GMRT observing run, we co-added the HI 21 cm emission signals from 2,841 blue star-forming galaxies that lie within the full-width at half-maximum of the GMRT primary beam. This yielded a $5.0\\sigma$ detection of the average HI 21 cm signal from the 2,841 galaxies at an average redshift $\\langle z \\rangle \\approx 1.3$, only the second detection of HI 21 cm emission at $"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2105.06773","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-05-14T11:32:46Z","cross_cats_sorted":[],"title_canon_sha256":"54c399412ea58f39c4ca212c4e8e9f68dd185a6afe4d00804ec7e7fff4d29d7d","abstract_canon_sha256":"a03e7f601139ae938bb8d3f2f9de76d848352d88ccacddffe80b619becf27043"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:47:07.702038Z","signature_b64":"Al/k5oCjyQZOHxB4ptoRJ26x4AZovTDpdtoAgbBPPW4MPSBpHnzZm5PAS4XL9I5Ee/IVXRxwyxIID2w1QQcCCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8233001e9dc8545bc1ec420f5fb9e0fbe0e368a3290ce3ccb86759172555af8","last_reissued_at":"2026-07-05T02:47:07.701536Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:47:07.701536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Giant Metrewave Radio Telescope Detection of HI 21 cm Emission from Star-forming Galaxies at $z \\approx 1.3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aditya Chowdhury, Barnali Das, K.S. Dwarakanath, Nissim Kanekar, Shiv Sethi","submitted_at":"2021-05-14T11:32:46Z","abstract_excerpt":"We report a $\\approx 400$-hour Giant Metrewave Radio Telescope (GMRT) search for HI 21 cm emission from star-forming galaxies at $z = 1.18-1.39$ in seven fields of the DEEP2 Galaxy Survey. Including data from an earlier 60-hour GMRT observing run, we co-added the HI 21 cm emission signals from 2,841 blue star-forming galaxies that lie within the full-width at half-maximum of the GMRT primary beam. This yielded a $5.0\\sigma$ detection of the average HI 21 cm signal from the 2,841 galaxies at an average redshift $\\langle z \\rangle \\approx 1.3$, only the second detection of HI 21 cm emission at $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.06773","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/2105.06773/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2105.06773","created_at":"2026-07-05T02:47:07.701599+00:00"},{"alias_kind":"arxiv_version","alias_value":"2105.06773v1","created_at":"2026-07-05T02:47:07.701599+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.06773","created_at":"2026-07-05T02:47:07.701599+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZARTAAPJ3SCU","created_at":"2026-07-05T02:47:07.701599+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZARTAAPJ3SCULPA6","created_at":"2026-07-05T02:47:07.701599+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZARTAAPJ","created_at":"2026-07-05T02:47:07.701599+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.06143","citing_title":"Deep far-UV observations of the ELAIS N1 field using AstroSat: Source catalogue, spectral energy distribution modelling and star formation","ref_index":217,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6","json":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6.json","graph_json":"https://pith.science/api/pith-number/ZARTAAPJ3SCULPA6YQQPL646B6/graph.json","events_json":"https://pith.science/api/pith-number/ZARTAAPJ3SCULPA6YQQPL646B6/events.json","paper":"https://pith.science/paper/ZARTAAPJ"},"agent_actions":{"view_html":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6","download_json":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6.json","view_paper":"https://pith.science/paper/ZARTAAPJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2105.06773&json=true","fetch_graph":"https://pith.science/api/pith-number/ZARTAAPJ3SCULPA6YQQPL646B6/graph.json","fetch_events":"https://pith.science/api/pith-number/ZARTAAPJ3SCULPA6YQQPL646B6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6/action/storage_attestation","attest_author":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6/action/author_attestation","sign_citation":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6/action/citation_signature","submit_replication":"https://pith.science/pith/ZARTAAPJ3SCULPA6YQQPL646B6/action/replication_record"}},"created_at":"2026-07-05T02:47:07.701599+00:00","updated_at":"2026-07-05T02:47:07.701599+00:00"}