{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:RWWPH3G3CEHGKVXW6UPK6RD2ZH","short_pith_number":"pith:RWWPH3G3","canonical_record":{"source":{"id":"2607.04909","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-07-06T10:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"48c8dd408695662b57726e92e3a48a22340853f5c4caa06ca99ad6d696d6595d","abstract_canon_sha256":"46cc272f2caa80092c1ebc5d79a1ca15c08b356cdb06bae1a015b4ea170f41d3"},"schema_version":"1.0"},"canonical_sha256":"8dacf3ecdb110e6556f6f51eaf447ac9ea5306c9ee556f47157b6e3e753b7ede","source":{"kind":"arxiv","id":"2607.04909","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.04909","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"arxiv_version","alias_value":"2607.04909v1","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.04909","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_12","alias_value":"RWWPH3G3CEHG","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_16","alias_value":"RWWPH3G3CEHGKVXW","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_8","alias_value":"RWWPH3G3","created_at":"2026-07-07T02:20:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:RWWPH3G3CEHGKVXW6UPK6RD2ZH","target":"record","payload":{"canonical_record":{"source":{"id":"2607.04909","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-07-06T10:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"48c8dd408695662b57726e92e3a48a22340853f5c4caa06ca99ad6d696d6595d","abstract_canon_sha256":"46cc272f2caa80092c1ebc5d79a1ca15c08b356cdb06bae1a015b4ea170f41d3"},"schema_version":"1.0"},"canonical_sha256":"8dacf3ecdb110e6556f6f51eaf447ac9ea5306c9ee556f47157b6e3e753b7ede","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-07T02:20:10.834542Z","signature_b64":"w/t9CUOxMwiYjvEPD61327mvb5eobJWinis630ob/8UB2+oe68Q0mE1kcrhxJjGHZx27XkKszPbqa2lBwWamDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8dacf3ecdb110e6556f6f51eaf447ac9ea5306c9ee556f47157b6e3e753b7ede","last_reissued_at":"2026-07-07T02:20:10.833897Z","signature_status":"signed_v1","first_computed_at":"2026-07-07T02:20:10.833897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.04909","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-07T02:20:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T4KwordMNld4Ig4ByO1arpYHzsIN8VW17h3nCfmz6CXtQB1lJcx/azL9SiJihXlshmgB4lAMzJmHbhcCL3gOAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:48:48.262028Z"},"content_sha256":"67626c593875fcaaaf52b5ed75dad46bd31e124809cdd2469bb8b14a213e4b55","schema_version":"1.0","event_id":"sha256:67626c593875fcaaaf52b5ed75dad46bd31e124809cdd2469bb8b14a213e4b55"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:RWWPH3G3CEHGKVXW6UPK6RD2ZH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A stepping stone toward detecting gravitational wave memory: a cumulative analysis with the full $(\\ell=2, m=0)$ spherical harmonic using events from GWTC-4.0 and GWTC-5.0","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Antoni Ramos-Buades, Joan Llobera-Querol, Jorge Valencia, Maria Rossell\\'o-Sastre, Sascha Husa, Yumeng Xu","submitted_at":"2026-07-06T10:38:36Z","abstract_excerpt":"We perform Bayesian model selection to test for the presence of the $(\\ell=2,m=0)$ spherical harmonic mode in gravitational wave events that have previously been identified as binary black hole mergers. As our signal model we use the quasi-circular, non-precessing IMRPhenomTHM_20 waveform model, which includes the oscillatory and displacement memory contributions. Including the oscillatory component of the (2,0) mode increases the signal-to-noise ratio and evidence for this mode, compared to testing only for the presence of gravitational wave memory. Our analysis thus constitutes a natural ste"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.04909","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/2607.04909/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":"2026-07-07T02:20:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JdhFvWNO+4fRlcPlnRcVACZp7WRZV9LHMwa6DlBNqAMT7TCcveM+v7GpGJaXf2MT+3R01w4qH+O6uxr9mTklAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:48:48.262414Z"},"content_sha256":"31be4f18c8e613b2a864d638f2a1bdcc557ee11f83bedacb93a6bcb68ab93feb","schema_version":"1.0","event_id":"sha256:31be4f18c8e613b2a864d638f2a1bdcc557ee11f83bedacb93a6bcb68ab93feb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/bundle.json","state_url":"https://pith.science/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/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":"2026-08-03T19:48:48Z","links":{"resolver":"https://pith.science/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH","bundle":"https://pith.science/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/bundle.json","state":"https://pith.science/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RWWPH3G3CEHGKVXW6UPK6RD2ZH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:RWWPH3G3CEHGKVXW6UPK6RD2ZH","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":"46cc272f2caa80092c1ebc5d79a1ca15c08b356cdb06bae1a015b4ea170f41d3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-07-06T10:38:36Z","title_canon_sha256":"48c8dd408695662b57726e92e3a48a22340853f5c4caa06ca99ad6d696d6595d"},"schema_version":"1.0","source":{"id":"2607.04909","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.04909","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"arxiv_version","alias_value":"2607.04909v1","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.04909","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_12","alias_value":"RWWPH3G3CEHG","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_16","alias_value":"RWWPH3G3CEHGKVXW","created_at":"2026-07-07T02:20:10Z"},{"alias_kind":"pith_short_8","alias_value":"RWWPH3G3","created_at":"2026-07-07T02:20:10Z"}],"graph_snapshots":[{"event_id":"sha256:31be4f18c8e613b2a864d638f2a1bdcc557ee11f83bedacb93a6bcb68ab93feb","target":"graph","created_at":"2026-07-07T02:20:10Z","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/2607.04909/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We perform Bayesian model selection to test for the presence of the $(\\ell=2,m=0)$ spherical harmonic mode in gravitational wave events that have previously been identified as binary black hole mergers. As our signal model we use the quasi-circular, non-precessing IMRPhenomTHM_20 waveform model, which includes the oscillatory and displacement memory contributions. Including the oscillatory component of the (2,0) mode increases the signal-to-noise ratio and evidence for this mode, compared to testing only for the presence of gravitational wave memory. Our analysis thus constitutes a natural ste","authors_text":"Antoni Ramos-Buades, Joan Llobera-Querol, Jorge Valencia, Maria Rossell\\'o-Sastre, Sascha Husa, Yumeng Xu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-07-06T10:38:36Z","title":"A stepping stone toward detecting gravitational wave memory: a cumulative analysis with the full $(\\ell=2, m=0)$ spherical harmonic using events from GWTC-4.0 and GWTC-5.0"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.04909","kind":"arxiv","version":1},"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":"sha256:67626c593875fcaaaf52b5ed75dad46bd31e124809cdd2469bb8b14a213e4b55","target":"record","created_at":"2026-07-07T02:20:10Z","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":"46cc272f2caa80092c1ebc5d79a1ca15c08b356cdb06bae1a015b4ea170f41d3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-07-06T10:38:36Z","title_canon_sha256":"48c8dd408695662b57726e92e3a48a22340853f5c4caa06ca99ad6d696d6595d"},"schema_version":"1.0","source":{"id":"2607.04909","kind":"arxiv","version":1}},"canonical_sha256":"8dacf3ecdb110e6556f6f51eaf447ac9ea5306c9ee556f47157b6e3e753b7ede","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8dacf3ecdb110e6556f6f51eaf447ac9ea5306c9ee556f47157b6e3e753b7ede","first_computed_at":"2026-07-07T02:20:10.833897Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-07T02:20:10.833897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w/t9CUOxMwiYjvEPD61327mvb5eobJWinis630ob/8UB2+oe68Q0mE1kcrhxJjGHZx27XkKszPbqa2lBwWamDg==","signature_status":"signed_v1","signed_at":"2026-07-07T02:20:10.834542Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.04909","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67626c593875fcaaaf52b5ed75dad46bd31e124809cdd2469bb8b14a213e4b55","sha256:31be4f18c8e613b2a864d638f2a1bdcc557ee11f83bedacb93a6bcb68ab93feb"],"state_sha256":"878fa767b7c9c4c3048de25aa5975866ed7803a290e7cd36ea3ef0a24188c0d9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dlu1EC2pmRhrVCxl2KjhTwiXdOuYnF8XNfn/AkZquI1xSi1gxOfX3o3Bn9u3t7Pje8epsRTxhY3yhNyvpvVGDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T19:48:48.265022Z","bundle_sha256":"8cec57309e821e97cae5a171368eff1820f37942b1b72746994cd46bebfb99c7"}}