{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:4NZWJ72UD3H5L2SJRU3QGJOANW","short_pith_number":"pith:4NZWJ72U","schema_version":"1.0","canonical_sha256":"e37364ff541ecfd5ea498d370325c06da3357f1abd2e4b413fe33a36f4590718","source":{"kind":"arxiv","id":"2104.07783","version":2},"attestation_state":"computed","paper":{"title":"Poking Holes: Looking for Gaps in LIGO/Virgo's Black Hole Population","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Ben Farr, Bruce Edelman, Zoheyr Doctor","submitted_at":"2021-04-15T21:35:18Z","abstract_excerpt":"Stellar evolution models predict the existence of a gap in the black hole mass spectrum from $\\sim55 M_\\odot - 120 M_\\odot$ due to pair-instability supernovae (PISNe). We investigate the possible existence of such an \"upper\" mass gap in the second gravitational wave transient catalog (GWTC-2) by hierarchically modeling the astrophysical distribution of black hole masses. We extend the Truncated and Powerlaw+Peak mass distribution families to allow for an explicit gap in the mass distribution, and apply the extended models to GWTC-2. We find that with the Truncated model there is mild evidence "},"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":"2104.07783","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-04-15T21:35:18Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"43a5a00e39d7ac6feb9b971596d8c635f3e5c39a5f3bf115b636fe8fec0da47c","abstract_canon_sha256":"982690028dc4e71f5864b0aa59bf57443a310cf83f7a4fdb16e8898d625a6e96"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:50:48.446644Z","signature_b64":"8ta3xQ39HjCpyRFySQkftpMZo9D1m7bwJeJfTL+Se9ONlVGk7wv768jqRFngkzC9e0pahE+DGocPxVx4pkYyAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e37364ff541ecfd5ea498d370325c06da3357f1abd2e4b413fe33a36f4590718","last_reissued_at":"2026-07-05T03:50:48.446223Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:50:48.446223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Poking Holes: Looking for Gaps in LIGO/Virgo's Black Hole Population","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Ben Farr, Bruce Edelman, Zoheyr Doctor","submitted_at":"2021-04-15T21:35:18Z","abstract_excerpt":"Stellar evolution models predict the existence of a gap in the black hole mass spectrum from $\\sim55 M_\\odot - 120 M_\\odot$ due to pair-instability supernovae (PISNe). We investigate the possible existence of such an \"upper\" mass gap in the second gravitational wave transient catalog (GWTC-2) by hierarchically modeling the astrophysical distribution of black hole masses. We extend the Truncated and Powerlaw+Peak mass distribution families to allow for an explicit gap in the mass distribution, and apply the extended models to GWTC-2. We find that with the Truncated model there is mild evidence "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.07783","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/2104.07783/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":"2104.07783","created_at":"2026-07-05T03:50:48.446280+00:00"},{"alias_kind":"arxiv_version","alias_value":"2104.07783v2","created_at":"2026-07-05T03:50:48.446280+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.07783","created_at":"2026-07-05T03:50:48.446280+00:00"},{"alias_kind":"pith_short_12","alias_value":"4NZWJ72UD3H5","created_at":"2026-07-05T03:50:48.446280+00:00"},{"alias_kind":"pith_short_16","alias_value":"4NZWJ72UD3H5L2SJ","created_at":"2026-07-05T03:50:48.446280+00:00"},{"alias_kind":"pith_short_8","alias_value":"4NZWJ72U","created_at":"2026-07-05T03:50:48.446280+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2601.18835","citing_title":"Beyond FINDCHIRP: Breaking the memory wall and optimal FFTs for Gravitational-Wave Matched-Filter Searches with Ratio-Filter Dechirping","ref_index":11,"is_internal_anchor":false},{"citing_arxiv_id":"2108.01045","citing_title":"GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run","ref_index":200,"is_internal_anchor":false},{"citing_arxiv_id":"2604.07456","citing_title":"Second-Generation Mass Peak in the Gravitational-Wave Population as a Probe of Globular Clusters","ref_index":51,"is_internal_anchor":false},{"citing_arxiv_id":"2601.07908","citing_title":"Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset","ref_index":13,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW","json":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW.json","graph_json":"https://pith.science/api/pith-number/4NZWJ72UD3H5L2SJRU3QGJOANW/graph.json","events_json":"https://pith.science/api/pith-number/4NZWJ72UD3H5L2SJRU3QGJOANW/events.json","paper":"https://pith.science/paper/4NZWJ72U"},"agent_actions":{"view_html":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW","download_json":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW.json","view_paper":"https://pith.science/paper/4NZWJ72U","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2104.07783&json=true","fetch_graph":"https://pith.science/api/pith-number/4NZWJ72UD3H5L2SJRU3QGJOANW/graph.json","fetch_events":"https://pith.science/api/pith-number/4NZWJ72UD3H5L2SJRU3QGJOANW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW/action/storage_attestation","attest_author":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW/action/author_attestation","sign_citation":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW/action/citation_signature","submit_replication":"https://pith.science/pith/4NZWJ72UD3H5L2SJRU3QGJOANW/action/replication_record"}},"created_at":"2026-07-05T03:50:48.446280+00:00","updated_at":"2026-07-05T03:50:48.446280+00:00"}