{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:ED5IHBHXERM4HRKH6TPZEL5S7Z","short_pith_number":"pith:ED5IHBHX","canonical_record":{"source":{"id":"2404.06546","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-09T18:00:31Z","cross_cats_sorted":[],"title_canon_sha256":"21565c2e2096f939a1c034c2b0ad7ecaf650d5c766b5a985a88767ed06b2f5bc","abstract_canon_sha256":"61454876490fb4833590ea50399679996cc8cca5e68860f1e193b542f0a03d04"},"schema_version":"1.0"},"canonical_sha256":"20fa8384f72459c3c547f4df922fb2fe6e1c5bea9bffe671b3c82c812a065682","source":{"kind":"arxiv","id":"2404.06546","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.06546","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"arxiv_version","alias_value":"2404.06546v2","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.06546","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_12","alias_value":"ED5IHBHXERM4","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_16","alias_value":"ED5IHBHXERM4HRKH","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_8","alias_value":"ED5IHBHX","created_at":"2026-07-05T08:15:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:ED5IHBHXERM4HRKH6TPZEL5S7Z","target":"record","payload":{"canonical_record":{"source":{"id":"2404.06546","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-09T18:00:31Z","cross_cats_sorted":[],"title_canon_sha256":"21565c2e2096f939a1c034c2b0ad7ecaf650d5c766b5a985a88767ed06b2f5bc","abstract_canon_sha256":"61454876490fb4833590ea50399679996cc8cca5e68860f1e193b542f0a03d04"},"schema_version":"1.0"},"canonical_sha256":"20fa8384f72459c3c547f4df922fb2fe6e1c5bea9bffe671b3c82c812a065682","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:15:47.562790Z","signature_b64":"81n94Tsc6Y5q8Kf/XBoy8JFBInrHe3kwtjUL+40Smn5FUejUF8nfdmY0XmRVb4qu3EvCl1r4Q3h0SVHT9wSsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20fa8384f72459c3c547f4df922fb2fe6e1c5bea9bffe671b3c82c812a065682","last_reissued_at":"2026-07-05T08:15:47.562286Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:15:47.562286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.06546","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":"2026-07-05T08:15:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NOZ643D5e8fH5J8gdKJUdJRx+c+aUftc9fgMRpDmhs+DhxHV8qcTiFNbHsQiyJaT8SBBvvc6klmcT3oWdiV1Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:49:50.867134Z"},"content_sha256":"95de0f543f8a48d74cd801f1aab12d14baa7f6472373c715e83cf6a4662478ce","schema_version":"1.0","event_id":"sha256:95de0f543f8a48d74cd801f1aab12d14baa7f6472373c715e83cf6a4662478ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:ED5IHBHXERM4HRKH6TPZEL5S7Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The HI Mass Function of Star-forming Galaxies at $z\\approx1$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aditya Chowdhury, Jayaram N. Chengalur, Nissim Kanekar","submitted_at":"2024-04-09T18:00:31Z","abstract_excerpt":"We present the first estimate, based on direct HI 21 cm observations, of the HI mass function (HIMF) of star-forming galaxies at $z\\approx1$, obtained by combining our measurement of the scaling relation between HI mass ($M_{HI}$) and B-band luminosity ($M_B$) of star-forming galaxies with literature estimates of the B-band luminosity function at $z\\approx1$. We determined the $M_{HI}-M_B$ relation by using the GMRT-CATz1 survey of the DEEP2 fields to measure the average HI mass of blue galaxies at $z=0.74-1.45$ in three separate $M_B$ subsamples. This was done by separately stacking the HI 21"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.06546","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.06546/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:15:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CNJ1L0pVBCV9vbLu6wMQQVvfiEg4ysA3J9ELeuwlBRptX+7F5ohWTpyDG1jK8dsDBerKY+oj9KZJYU+5A0z8Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T10:49:50.869310Z"},"content_sha256":"e498cc455dae104423882f2b4ae3d3f7216f98504eb33514ba058d45c508c3e1","schema_version":"1.0","event_id":"sha256:e498cc455dae104423882f2b4ae3d3f7216f98504eb33514ba058d45c508c3e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/bundle.json","state_url":"https://pith.science/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/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":"2026-08-04T10:49:50Z","links":{"resolver":"https://pith.science/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z","bundle":"https://pith.science/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/bundle.json","state":"https://pith.science/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ED5IHBHXERM4HRKH6TPZEL5S7Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:ED5IHBHXERM4HRKH6TPZEL5S7Z","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":"61454876490fb4833590ea50399679996cc8cca5e68860f1e193b542f0a03d04","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-09T18:00:31Z","title_canon_sha256":"21565c2e2096f939a1c034c2b0ad7ecaf650d5c766b5a985a88767ed06b2f5bc"},"schema_version":"1.0","source":{"id":"2404.06546","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.06546","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"arxiv_version","alias_value":"2404.06546v2","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.06546","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_12","alias_value":"ED5IHBHXERM4","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_16","alias_value":"ED5IHBHXERM4HRKH","created_at":"2026-07-05T08:15:47Z"},{"alias_kind":"pith_short_8","alias_value":"ED5IHBHX","created_at":"2026-07-05T08:15:47Z"}],"graph_snapshots":[{"event_id":"sha256:e498cc455dae104423882f2b4ae3d3f7216f98504eb33514ba058d45c508c3e1","target":"graph","created_at":"2026-07-05T08:15:47Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2404.06546/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first estimate, based on direct HI 21 cm observations, of the HI mass function (HIMF) of star-forming galaxies at $z\\approx1$, obtained by combining our measurement of the scaling relation between HI mass ($M_{HI}$) and B-band luminosity ($M_B$) of star-forming galaxies with literature estimates of the B-band luminosity function at $z\\approx1$. We determined the $M_{HI}-M_B$ relation by using the GMRT-CATz1 survey of the DEEP2 fields to measure the average HI mass of blue galaxies at $z=0.74-1.45$ in three separate $M_B$ subsamples. This was done by separately stacking the HI 21","authors_text":"Aditya Chowdhury, Jayaram N. Chengalur, Nissim Kanekar","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-09T18:00:31Z","title":"The HI Mass Function of Star-forming Galaxies at $z\\approx1$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.06546","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":"sha256:95de0f543f8a48d74cd801f1aab12d14baa7f6472373c715e83cf6a4662478ce","target":"record","created_at":"2026-07-05T08:15:47Z","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":"61454876490fb4833590ea50399679996cc8cca5e68860f1e193b542f0a03d04","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-09T18:00:31Z","title_canon_sha256":"21565c2e2096f939a1c034c2b0ad7ecaf650d5c766b5a985a88767ed06b2f5bc"},"schema_version":"1.0","source":{"id":"2404.06546","kind":"arxiv","version":2}},"canonical_sha256":"20fa8384f72459c3c547f4df922fb2fe6e1c5bea9bffe671b3c82c812a065682","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20fa8384f72459c3c547f4df922fb2fe6e1c5bea9bffe671b3c82c812a065682","first_computed_at":"2026-07-05T08:15:47.562286Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:15:47.562286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"81n94Tsc6Y5q8Kf/XBoy8JFBInrHe3kwtjUL+40Smn5FUejUF8nfdmY0XmRVb4qu3EvCl1r4Q3h0SVHT9wSsBg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:15:47.562790Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.06546","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95de0f543f8a48d74cd801f1aab12d14baa7f6472373c715e83cf6a4662478ce","sha256:e498cc455dae104423882f2b4ae3d3f7216f98504eb33514ba058d45c508c3e1"],"state_sha256":"c2a78e1724fd4d77c1a942fa8e81dade28738c53a9d1dd170b4c5f1371b5da92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f4seUCUZ44Qb532vRBj3YqqJxnf+Pv/3eSTAb+HCD75ckAAFF3Wz+Mj1X2A2frVgL+TcJj8Vfpb4uudrn9wtAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T10:49:50.893042Z","bundle_sha256":"259158be8c567d386c8eaebe84f59e1d77d17d759407b0283f71faa96b2abbe4"}}