{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:MDMYU6FSBETFF67REDYSFF2MF7","short_pith_number":"pith:MDMYU6FS","canonical_record":{"source":{"id":"2307.01093","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-03T15:13:03Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"f5c604ecd34ab904cd7a19b7a69e963a7d03555cbe1cb0609b5cbe4df32571d0","abstract_canon_sha256":"e19838fc1ea98d28379540c32dc32a69aaa041af443a8784c2b17313433e23ea"},"schema_version":"1.0"},"canonical_sha256":"60d98a78b2092652fbf120f122974c2fd7cc590663dd0cc42019f8b68f56bfc9","source":{"kind":"arxiv","id":"2307.01093","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.01093","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"2307.01093v1","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.01093","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"MDMYU6FSBETF","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"MDMYU6FSBETFF67R","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"MDMYU6FS","created_at":"2026-07-05T06:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:MDMYU6FSBETFF67REDYSFF2MF7","target":"record","payload":{"canonical_record":{"source":{"id":"2307.01093","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-03T15:13:03Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"f5c604ecd34ab904cd7a19b7a69e963a7d03555cbe1cb0609b5cbe4df32571d0","abstract_canon_sha256":"e19838fc1ea98d28379540c32dc32a69aaa041af443a8784c2b17313433e23ea"},"schema_version":"1.0"},"canonical_sha256":"60d98a78b2092652fbf120f122974c2fd7cc590663dd0cc42019f8b68f56bfc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:27:04.043392Z","signature_b64":"o3LfrBgTIkCPuTnSxb7lcXoKrHAJzscb29G97ZPM2UFL5oEEEx1Gl71Wz2+4fax/v57qYfPHr+oza8dzgberAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"60d98a78b2092652fbf120f122974c2fd7cc590663dd0cc42019f8b68f56bfc9","last_reissued_at":"2026-07-05T06:27:04.042961Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:27:04.042961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.01093","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":"2026-07-05T06:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sXKN1uetLLEyTvk1xWLwDkYw926JHO6ZUFvPLOjKOKrZ/E6OWElDQSb8T3oeMTYBRgUWVfbt0wsI7n5jwHPgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T12:14:32.090676Z"},"content_sha256":"52277b446cc9c18c1bba65be057f3c069c0fb2366b5b774eba5e617bd59f4f97","schema_version":"1.0","event_id":"sha256:52277b446cc9c18c1bba65be057f3c069c0fb2366b5b774eba5e617bd59f4f97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:MDMYU6FSBETFF67REDYSFF2MF7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detecting new fundamental fields with Pulsar Timing Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Chao Zhang, Ning Dai, Qing Gao, Tong Jiang, Xuchen Lu, Yungui Gong","submitted_at":"2023-07-03T15:13:03Z","abstract_excerpt":"Strong evidence of the existence of the Stochastic Gravitational-Wave Background (SGWB) has been reported by the NANOGrav, PPTA, EPTA and CPTA collaborations. The Bayesian posteriors of the Gravitational-Wave Background (GWB) amplitude and spectrum are compatible with current astrophysical predictions for the GWB from the population of supermassive black hole binaries (SMBHBs). In this paper, we discuss the corrections arising from the extra scalar or vector radiation to the characteristic dimensionless strain in PTA experiments and explore the possibility to detect charges surrounding massive"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.01093","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/2307.01093/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":"2026-07-05T06:27:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L+0luTJfUMthPfSVgzMlkecKL42hn1oEOszmxT+U8uOjaVnIbHoavVkM5Mn1SlaPg+D4rdqPa2bpzcP1ISnbAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T12:14:32.091206Z"},"content_sha256":"54d2fcc75f135e3ad2d42fb40f53f5e7e05a7008f67e529a3139317399698b41","schema_version":"1.0","event_id":"sha256:54d2fcc75f135e3ad2d42fb40f53f5e7e05a7008f67e529a3139317399698b41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MDMYU6FSBETFF67REDYSFF2MF7/bundle.json","state_url":"https://pith.science/pith/MDMYU6FSBETFF67REDYSFF2MF7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MDMYU6FSBETFF67REDYSFF2MF7/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":"2026-08-06T12:14:32Z","links":{"resolver":"https://pith.science/pith/MDMYU6FSBETFF67REDYSFF2MF7","bundle":"https://pith.science/pith/MDMYU6FSBETFF67REDYSFF2MF7/bundle.json","state":"https://pith.science/pith/MDMYU6FSBETFF67REDYSFF2MF7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MDMYU6FSBETFF67REDYSFF2MF7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:MDMYU6FSBETFF67REDYSFF2MF7","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":"e19838fc1ea98d28379540c32dc32a69aaa041af443a8784c2b17313433e23ea","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-03T15:13:03Z","title_canon_sha256":"f5c604ecd34ab904cd7a19b7a69e963a7d03555cbe1cb0609b5cbe4df32571d0"},"schema_version":"1.0","source":{"id":"2307.01093","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.01093","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"arxiv_version","alias_value":"2307.01093v1","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.01093","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_12","alias_value":"MDMYU6FSBETF","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"MDMYU6FSBETFF67R","created_at":"2026-07-05T06:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"MDMYU6FS","created_at":"2026-07-05T06:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:54d2fcc75f135e3ad2d42fb40f53f5e7e05a7008f67e529a3139317399698b41","target":"graph","created_at":"2026-07-05T06:27:04Z","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/2307.01093/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Strong evidence of the existence of the Stochastic Gravitational-Wave Background (SGWB) has been reported by the NANOGrav, PPTA, EPTA and CPTA collaborations. The Bayesian posteriors of the Gravitational-Wave Background (GWB) amplitude and spectrum are compatible with current astrophysical predictions for the GWB from the population of supermassive black hole binaries (SMBHBs). In this paper, we discuss the corrections arising from the extra scalar or vector radiation to the characteristic dimensionless strain in PTA experiments and explore the possibility to detect charges surrounding massive","authors_text":"Chao Zhang, Ning Dai, Qing Gao, Tong Jiang, Xuchen Lu, Yungui Gong","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-03T15:13:03Z","title":"Detecting new fundamental fields with Pulsar Timing Arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.01093","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":"sha256:52277b446cc9c18c1bba65be057f3c069c0fb2366b5b774eba5e617bd59f4f97","target":"record","created_at":"2026-07-05T06:27:04Z","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":"e19838fc1ea98d28379540c32dc32a69aaa041af443a8784c2b17313433e23ea","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-03T15:13:03Z","title_canon_sha256":"f5c604ecd34ab904cd7a19b7a69e963a7d03555cbe1cb0609b5cbe4df32571d0"},"schema_version":"1.0","source":{"id":"2307.01093","kind":"arxiv","version":1}},"canonical_sha256":"60d98a78b2092652fbf120f122974c2fd7cc590663dd0cc42019f8b68f56bfc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60d98a78b2092652fbf120f122974c2fd7cc590663dd0cc42019f8b68f56bfc9","first_computed_at":"2026-07-05T06:27:04.042961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:27:04.042961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o3LfrBgTIkCPuTnSxb7lcXoKrHAJzscb29G97ZPM2UFL5oEEEx1Gl71Wz2+4fax/v57qYfPHr+oza8dzgberAw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:27:04.043392Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.01093","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52277b446cc9c18c1bba65be057f3c069c0fb2366b5b774eba5e617bd59f4f97","sha256:54d2fcc75f135e3ad2d42fb40f53f5e7e05a7008f67e529a3139317399698b41"],"state_sha256":"cd1a219a4a01d53a7401f8cf3061352175be1f1c5705fabd7ceff8a93ffa8b7d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JWXTHabrs+xQAl20myZ61Vm/MT67z8chryG7tJhTmh2LlCFvKqv1BVnMKBHMlGRXXfO4S0V+cd/4r2zeRPVEBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T12:14:32.095249Z","bundle_sha256":"19fefc353e094358598b3708b856cd964f63a8222d35dddcc0e87b8faa8d3389"}}