{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QBHQFQJ7FT3ZIA3IDOYHDRSAQF","short_pith_number":"pith:QBHQFQJ7","canonical_record":{"source":{"id":"1510.07050","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-23T20:05:56Z","cross_cats_sorted":[],"title_canon_sha256":"bbd8d155d40cab85d5892a53a1311de68efc2b9da7aaba92f64a48017613e229","abstract_canon_sha256":"f03b0ca840d266fc94810f3c22b6a5c9472a643806765781ea2273a33cf84574"},"schema_version":"1.0"},"canonical_sha256":"804f02c13f2cf79403681bb071c64081615563c215d37cd7f7a4d65e2ac7d84e","source":{"kind":"arxiv","id":"1510.07050","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07050","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07050v2","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07050","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"QBHQFQJ7FT3Z","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QBHQFQJ7FT3ZIA3I","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QBHQFQJ7","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QBHQFQJ7FT3ZIA3IDOYHDRSAQF","target":"record","payload":{"canonical_record":{"source":{"id":"1510.07050","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-23T20:05:56Z","cross_cats_sorted":[],"title_canon_sha256":"bbd8d155d40cab85d5892a53a1311de68efc2b9da7aaba92f64a48017613e229","abstract_canon_sha256":"f03b0ca840d266fc94810f3c22b6a5c9472a643806765781ea2273a33cf84574"},"schema_version":"1.0"},"canonical_sha256":"804f02c13f2cf79403681bb071c64081615563c215d37cd7f7a4d65e2ac7d84e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:33.584502Z","signature_b64":"pLSwnXsDqYVwWTJlqhv9u90J6233vrv+B5kvKfWS016nVCXRoZmpoHdv5nEqgWt8KBmZTluYWEPlv2s09Nf/Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"804f02c13f2cf79403681bb071c64081615563c215d37cd7f7a4d65e2ac7d84e","last_reissued_at":"2026-05-18T01:20:33.583989Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:33.583989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.07050","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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MSq6c2xpLd3HE/jKomCCjQXJ3Sg5/cNYrizlj2GJ4pP8E7p7f0lUjaswS1ow6jTttyDPM6WzzrYbCz6ssJYqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T13:46:30.123171Z"},"content_sha256":"2a390a1721d3186549f6106b8f74ade2e55829b822fb8d5aca113ec44fde2ac1","schema_version":"1.0","event_id":"sha256:2a390a1721d3186549f6106b8f74ade2e55829b822fb8d5aca113ec44fde2ac1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QBHQFQJ7FT3ZIA3IDOYHDRSAQF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Environmental dependence of the HI mass function in the ALFALFA 70% catalogue","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Emmanouil Papastergis, Martha P. Haynes, Michael G. Jones, Riccardo Giovanelli","submitted_at":"2015-10-23T20:05:56Z","abstract_excerpt":"We search for environmental dependence of the HI mass function in the ALFALFA 70% catalogue. The catalogue is split into quartiles of environment density based on the projected neighbour density of neighbours found in both SDSS and 2MRS volume limited reference catalogues. We find the Schechter function 'knee' mass to be dependent on environment, with the value of $\\log ({M_{*}/\\mathrm{M_{\\odot}}})$ shifting from $9.81 \\pm 0.02$ to $10.00 \\pm 0.03$ between the lowest and highest density quartiles. However, this dependence was only observed when defining environment based on the SDSS reference "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07050","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":""},"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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3+NnQUYzwJXZczzUdvb67xydBHEHs1RjGZ9/FHrZj6f1r9jYh81NLyWZLiwgj7zJGFDyME11N2PNXpr2UFggCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T13:46:30.123595Z"},"content_sha256":"71e2df6eaa2881a9411a88d6d820cdfa342725e26fc00267280c8d46af50a4b3","schema_version":"1.0","event_id":"sha256:71e2df6eaa2881a9411a88d6d820cdfa342725e26fc00267280c8d46af50a4b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/bundle.json","state_url":"https://pith.science/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/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":"2026-05-24T13:46:30Z","links":{"resolver":"https://pith.science/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF","bundle":"https://pith.science/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/bundle.json","state":"https://pith.science/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QBHQFQJ7FT3ZIA3IDOYHDRSAQF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QBHQFQJ7FT3ZIA3IDOYHDRSAQF","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":"f03b0ca840d266fc94810f3c22b6a5c9472a643806765781ea2273a33cf84574","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-23T20:05:56Z","title_canon_sha256":"bbd8d155d40cab85d5892a53a1311de68efc2b9da7aaba92f64a48017613e229"},"schema_version":"1.0","source":{"id":"1510.07050","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07050","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07050v2","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07050","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"QBHQFQJ7FT3Z","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QBHQFQJ7FT3ZIA3I","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QBHQFQJ7","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:71e2df6eaa2881a9411a88d6d820cdfa342725e26fc00267280c8d46af50a4b3","target":"graph","created_at":"2026-05-18T01:20:33Z","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":"We search for environmental dependence of the HI mass function in the ALFALFA 70% catalogue. The catalogue is split into quartiles of environment density based on the projected neighbour density of neighbours found in both SDSS and 2MRS volume limited reference catalogues. We find the Schechter function 'knee' mass to be dependent on environment, with the value of $\\log ({M_{*}/\\mathrm{M_{\\odot}}})$ shifting from $9.81 \\pm 0.02$ to $10.00 \\pm 0.03$ between the lowest and highest density quartiles. However, this dependence was only observed when defining environment based on the SDSS reference ","authors_text":"Emmanouil Papastergis, Martha P. Haynes, Michael G. Jones, Riccardo Giovanelli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-23T20:05:56Z","title":"Environmental dependence of the HI mass function in the ALFALFA 70% catalogue"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07050","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":"sha256:2a390a1721d3186549f6106b8f74ade2e55829b822fb8d5aca113ec44fde2ac1","target":"record","created_at":"2026-05-18T01:20:33Z","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":"f03b0ca840d266fc94810f3c22b6a5c9472a643806765781ea2273a33cf84574","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-23T20:05:56Z","title_canon_sha256":"bbd8d155d40cab85d5892a53a1311de68efc2b9da7aaba92f64a48017613e229"},"schema_version":"1.0","source":{"id":"1510.07050","kind":"arxiv","version":2}},"canonical_sha256":"804f02c13f2cf79403681bb071c64081615563c215d37cd7f7a4d65e2ac7d84e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"804f02c13f2cf79403681bb071c64081615563c215d37cd7f7a4d65e2ac7d84e","first_computed_at":"2026-05-18T01:20:33.583989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:33.583989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pLSwnXsDqYVwWTJlqhv9u90J6233vrv+B5kvKfWS016nVCXRoZmpoHdv5nEqgWt8KBmZTluYWEPlv2s09Nf/Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:33.584502Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07050","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a390a1721d3186549f6106b8f74ade2e55829b822fb8d5aca113ec44fde2ac1","sha256:71e2df6eaa2881a9411a88d6d820cdfa342725e26fc00267280c8d46af50a4b3"],"state_sha256":"4d3799bd6203138e9ef38c389cba9b59d56c1d8106ff5be77fabcd47dce0a0af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ki365/WvIWBPIRtPaSI495wH/PoRORqNPXofjg/7ILSL+zkmIvaqmiU1tFiXV6pFg4aTH0hnBXqms2oWeh/bDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T13:46:30.126903Z","bundle_sha256":"b06766507d02dd464ca38c7234a193271a8f86d7983672a7ad98e0e029b04a94"}}