{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JFW6UFNL3HNSEPEJQNYIXRLYWE","short_pith_number":"pith:JFW6UFNL","canonical_record":{"source":{"id":"1808.10501","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-30T20:13:01Z","cross_cats_sorted":[],"title_canon_sha256":"be12e757c173749377f4cec314fbdfa42ae9b3236c2e66f6c2c5a0771cadaae6","abstract_canon_sha256":"574fcfcb197531d6440041d27ea25127b3ac3ae8a1025b297833434472b01b29"},"schema_version":"1.0"},"canonical_sha256":"496dea15abd9db223c8983708bc578b114b2bb06484a65ad52277a7cede61f18","source":{"kind":"arxiv","id":"1808.10501","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.10501","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"arxiv_version","alias_value":"1808.10501v3","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.10501","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_12","alias_value":"JFW6UFNL3HNS","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_16","alias_value":"JFW6UFNL3HNSEPEJ","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_8","alias_value":"JFW6UFNL","created_at":"2026-07-05T01:23:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JFW6UFNL3HNSEPEJQNYIXRLYWE","target":"record","payload":{"canonical_record":{"source":{"id":"1808.10501","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-30T20:13:01Z","cross_cats_sorted":[],"title_canon_sha256":"be12e757c173749377f4cec314fbdfa42ae9b3236c2e66f6c2c5a0771cadaae6","abstract_canon_sha256":"574fcfcb197531d6440041d27ea25127b3ac3ae8a1025b297833434472b01b29"},"schema_version":"1.0"},"canonical_sha256":"496dea15abd9db223c8983708bc578b114b2bb06484a65ad52277a7cede61f18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:23:21.406557Z","signature_b64":"w7rZrG7ypsPo/K7t+R5iEuXE2fM84ZcaKftJsnzgFFmSSPvSUDF/4oS4XmPkkejpg5yS9Sh8jPIayyoiTRKBDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"496dea15abd9db223c8983708bc578b114b2bb06484a65ad52277a7cede61f18","last_reissued_at":"2026-07-05T01:23:21.406071Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:23:21.406071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.10501","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:23:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KYBHGGgyexqXUf9R/Ig4gHnZlVwZiOKd8rHQy5ijdktLG2TPtJUwvcyGpgny1+w+O9PQrVRwa7xrZwRMuZLoAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:16:32.442264Z"},"content_sha256":"e969d581339df0157c3ffa85aec6ca0eb00d4cf67e6f7b2f546fa84625617ed8","schema_version":"1.0","event_id":"sha256:e969d581339df0157c3ffa85aec6ca0eb00d4cf67e6f7b2f546fa84625617ed8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JFW6UFNL3HNSEPEJQNYIXRLYWE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HI gas content of SDSS galaxies revealed by ALFALFA: implications for the mass-metallicity relation and the environmental dependence of HI in the local Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ying Zu (SJTU)","submitted_at":"2018-08-30T20:13:01Z","abstract_excerpt":"The neutral hydrogen~(HI) gas is an important barometer of recent star formation and metal enrichment activities in galaxies. I develop a novel statistical method for predicting the HI-to-stellar mass ratio $f_{gas}$ of galaxies from their stellar mass and optical colour, and apply it to a volume-limited galaxy sample jointly observed by the Sloan Digital Sky Survey and the Arecibo Legacy Fast ALFA survey. I eliminate the impact of the Malmquist bias against HI-deficient systems on the $f_{gas}$ predictor by properly accounting for the HI detection probability of each galaxy in the analysis. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.10501","kind":"arxiv","version":3},"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/1808.10501/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":"2026-07-05T01:23:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nbTt1GHhrxbeKPhM4qq/xw+n0jjs3MA5CpDCbDNp2mWBh3UV82LmAmtt129cXDOzis2QzmmRTe3F6FzL98iCBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T09:16:32.442622Z"},"content_sha256":"743cb18e374b9979f82672d8c849320614611acb6336d1fdcdd490f219acbd6d","schema_version":"1.0","event_id":"sha256:743cb18e374b9979f82672d8c849320614611acb6336d1fdcdd490f219acbd6d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/bundle.json","state_url":"https://pith.science/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/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":"2026-08-20T09:16:32Z","links":{"resolver":"https://pith.science/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE","bundle":"https://pith.science/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/bundle.json","state":"https://pith.science/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JFW6UFNL3HNSEPEJQNYIXRLYWE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JFW6UFNL3HNSEPEJQNYIXRLYWE","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":"574fcfcb197531d6440041d27ea25127b3ac3ae8a1025b297833434472b01b29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-30T20:13:01Z","title_canon_sha256":"be12e757c173749377f4cec314fbdfa42ae9b3236c2e66f6c2c5a0771cadaae6"},"schema_version":"1.0","source":{"id":"1808.10501","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.10501","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"arxiv_version","alias_value":"1808.10501v3","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.10501","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_12","alias_value":"JFW6UFNL3HNS","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_16","alias_value":"JFW6UFNL3HNSEPEJ","created_at":"2026-07-05T01:23:21Z"},{"alias_kind":"pith_short_8","alias_value":"JFW6UFNL","created_at":"2026-07-05T01:23:21Z"}],"graph_snapshots":[{"event_id":"sha256:743cb18e374b9979f82672d8c849320614611acb6336d1fdcdd490f219acbd6d","target":"graph","created_at":"2026-07-05T01:23:21Z","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/1808.10501/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The neutral hydrogen~(HI) gas is an important barometer of recent star formation and metal enrichment activities in galaxies. I develop a novel statistical method for predicting the HI-to-stellar mass ratio $f_{gas}$ of galaxies from their stellar mass and optical colour, and apply it to a volume-limited galaxy sample jointly observed by the Sloan Digital Sky Survey and the Arecibo Legacy Fast ALFA survey. I eliminate the impact of the Malmquist bias against HI-deficient systems on the $f_{gas}$ predictor by properly accounting for the HI detection probability of each galaxy in the analysis. T","authors_text":"Ying Zu (SJTU)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-30T20:13:01Z","title":"HI gas content of SDSS galaxies revealed by ALFALFA: implications for the mass-metallicity relation and the environmental dependence of HI in the local Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.10501","kind":"arxiv","version":3},"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:e969d581339df0157c3ffa85aec6ca0eb00d4cf67e6f7b2f546fa84625617ed8","target":"record","created_at":"2026-07-05T01:23:21Z","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":"574fcfcb197531d6440041d27ea25127b3ac3ae8a1025b297833434472b01b29","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-30T20:13:01Z","title_canon_sha256":"be12e757c173749377f4cec314fbdfa42ae9b3236c2e66f6c2c5a0771cadaae6"},"schema_version":"1.0","source":{"id":"1808.10501","kind":"arxiv","version":3}},"canonical_sha256":"496dea15abd9db223c8983708bc578b114b2bb06484a65ad52277a7cede61f18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"496dea15abd9db223c8983708bc578b114b2bb06484a65ad52277a7cede61f18","first_computed_at":"2026-07-05T01:23:21.406071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:23:21.406071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w7rZrG7ypsPo/K7t+R5iEuXE2fM84ZcaKftJsnzgFFmSSPvSUDF/4oS4XmPkkejpg5yS9Sh8jPIayyoiTRKBDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:23:21.406557Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.10501","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e969d581339df0157c3ffa85aec6ca0eb00d4cf67e6f7b2f546fa84625617ed8","sha256:743cb18e374b9979f82672d8c849320614611acb6336d1fdcdd490f219acbd6d"],"state_sha256":"5eddb8fe095496a408742fdf820b5d8e3c2e0267ebd080756f1c9b7766b99c0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IiJ6uzKrNQezx5svH3OKsjTGzHZFOaXVTsxRGkzEZYFR4wE++DXli5XrpCV2Z6ZiBMTnIOg/Egr1oAJ/io6KDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T09:16:32.446232Z","bundle_sha256":"7d2ff4bb730788fc0a47713031715c1a5803fbc789c18988e9571672ae38c70e"}}