{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6J2YWIQONWTO23PR4VJDB23JZG","short_pith_number":"pith:6J2YWIQO","canonical_record":{"source":{"id":"1901.11277","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2019-01-31T09:13:50Z","cross_cats_sorted":[],"title_canon_sha256":"8bbccaf3cedb7a9cdcd259fde70beb60f49971e6b113ce247382aa1d006da34c","abstract_canon_sha256":"ac5d19f3ab51849008968054ac11d370a6714dabd0b7e16d8d4e6469bc06ce27"},"schema_version":"1.0"},"canonical_sha256":"f2758b220e6da6ed6df1e55230eb69c98d672f043d0c2f83f0e3e2bda1c15737","source":{"kind":"arxiv","id":"1901.11277","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.11277","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"arxiv_version","alias_value":"1901.11277v3","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.11277","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_12","alias_value":"6J2YWIQONWTO","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_16","alias_value":"6J2YWIQONWTO23PR","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_8","alias_value":"6J2YWIQO","created_at":"2026-07-05T04:05:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6J2YWIQONWTO23PR4VJDB23JZG","target":"record","payload":{"canonical_record":{"source":{"id":"1901.11277","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2019-01-31T09:13:50Z","cross_cats_sorted":[],"title_canon_sha256":"8bbccaf3cedb7a9cdcd259fde70beb60f49971e6b113ce247382aa1d006da34c","abstract_canon_sha256":"ac5d19f3ab51849008968054ac11d370a6714dabd0b7e16d8d4e6469bc06ce27"},"schema_version":"1.0"},"canonical_sha256":"f2758b220e6da6ed6df1e55230eb69c98d672f043d0c2f83f0e3e2bda1c15737","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:05:27.683241Z","signature_b64":"Nv2KT4DbaGEjuRQhlA6k6paG9rAVkNv+ihYw7Xk6OPcuctKgMSq7V3RQjLo5+PoJHwEfB/936759nE2ymes8Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2758b220e6da6ed6df1e55230eb69c98d672f043d0c2f83f0e3e2bda1c15737","last_reissued_at":"2026-07-05T04:05:27.682736Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:05:27.682736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.11277","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":"2026-07-05T04:05:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cKtrvWQx6Ov13SW3E35wFM3QhyYYzF6zLqB+Wp5RGh46DRYjfJwNxw4xQ4w2gfIFrtccHGEwYUoQHkIsR474Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:39:43.094195Z"},"content_sha256":"6907570876089429ae6ba39e64754ac8621df65007390bcfb859cd7f67974d16","schema_version":"1.0","event_id":"sha256:6907570876089429ae6ba39e64754ac8621df65007390bcfb859cd7f67974d16"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6J2YWIQONWTO23PR4VJDB23JZG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravitational Waves in f(R) Gravity Power Law Model","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Dhruba Jyoti Gogoi, Umananda Dev Goswami","submitted_at":"2019-01-31T09:13:50Z","abstract_excerpt":"We investigate the different polarization modes of Gravitational Waves (GWs) in $f(R)$ gravity power law model in de Sitter space. It is seen that the massive scalar field polarization mode exists in this model. The mass of the scalar field depends highly on the background curvature and the power term $n$. However, we found that the model doesnot exhibit a massive scalar mode for $n=2$ and instead it shows a breathing mode in addition to the tensor plus and cross modes. Thus mass of the scalar field is found to vary with $n$ within the range $1 \\leq n \\leq 2$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.11277","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/1901.11277/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":"2026-07-05T04:05:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gfqKfuVBtOaaQLKiPHnh+ZDlPxExcgX+GQZP+VjKvnvq3z+MsSqn/yAbK3cU3cgFvUahUKZF+TnMeEVTT6jnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:39:43.094574Z"},"content_sha256":"c77eec52363fab773fe3d0ca3f16bb04a0aa7a85cd7f7831d06da775d5443478","schema_version":"1.0","event_id":"sha256:c77eec52363fab773fe3d0ca3f16bb04a0aa7a85cd7f7831d06da775d5443478"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6J2YWIQONWTO23PR4VJDB23JZG/bundle.json","state_url":"https://pith.science/pith/6J2YWIQONWTO23PR4VJDB23JZG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6J2YWIQONWTO23PR4VJDB23JZG/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":"2026-08-03T17:39:43Z","links":{"resolver":"https://pith.science/pith/6J2YWIQONWTO23PR4VJDB23JZG","bundle":"https://pith.science/pith/6J2YWIQONWTO23PR4VJDB23JZG/bundle.json","state":"https://pith.science/pith/6J2YWIQONWTO23PR4VJDB23JZG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6J2YWIQONWTO23PR4VJDB23JZG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6J2YWIQONWTO23PR4VJDB23JZG","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":"ac5d19f3ab51849008968054ac11d370a6714dabd0b7e16d8d4e6469bc06ce27","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2019-01-31T09:13:50Z","title_canon_sha256":"8bbccaf3cedb7a9cdcd259fde70beb60f49971e6b113ce247382aa1d006da34c"},"schema_version":"1.0","source":{"id":"1901.11277","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.11277","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"arxiv_version","alias_value":"1901.11277v3","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.11277","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_12","alias_value":"6J2YWIQONWTO","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_16","alias_value":"6J2YWIQONWTO23PR","created_at":"2026-07-05T04:05:27Z"},{"alias_kind":"pith_short_8","alias_value":"6J2YWIQO","created_at":"2026-07-05T04:05:27Z"}],"graph_snapshots":[{"event_id":"sha256:c77eec52363fab773fe3d0ca3f16bb04a0aa7a85cd7f7831d06da775d5443478","target":"graph","created_at":"2026-07-05T04:05:27Z","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/1901.11277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the different polarization modes of Gravitational Waves (GWs) in $f(R)$ gravity power law model in de Sitter space. It is seen that the massive scalar field polarization mode exists in this model. The mass of the scalar field depends highly on the background curvature and the power term $n$. However, we found that the model doesnot exhibit a massive scalar mode for $n=2$ and instead it shows a breathing mode in addition to the tensor plus and cross modes. Thus mass of the scalar field is found to vary with $n$ within the range $1 \\leq n \\leq 2$.","authors_text":"Dhruba Jyoti Gogoi, Umananda Dev Goswami","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2019-01-31T09:13:50Z","title":"Gravitational Waves in f(R) Gravity Power Law Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.11277","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":"sha256:6907570876089429ae6ba39e64754ac8621df65007390bcfb859cd7f67974d16","target":"record","created_at":"2026-07-05T04:05:27Z","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":"ac5d19f3ab51849008968054ac11d370a6714dabd0b7e16d8d4e6469bc06ce27","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2019-01-31T09:13:50Z","title_canon_sha256":"8bbccaf3cedb7a9cdcd259fde70beb60f49971e6b113ce247382aa1d006da34c"},"schema_version":"1.0","source":{"id":"1901.11277","kind":"arxiv","version":3}},"canonical_sha256":"f2758b220e6da6ed6df1e55230eb69c98d672f043d0c2f83f0e3e2bda1c15737","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2758b220e6da6ed6df1e55230eb69c98d672f043d0c2f83f0e3e2bda1c15737","first_computed_at":"2026-07-05T04:05:27.682736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:05:27.682736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nv2KT4DbaGEjuRQhlA6k6paG9rAVkNv+ihYw7Xk6OPcuctKgMSq7V3RQjLo5+PoJHwEfB/936759nE2ymes8Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T04:05:27.683241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.11277","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6907570876089429ae6ba39e64754ac8621df65007390bcfb859cd7f67974d16","sha256:c77eec52363fab773fe3d0ca3f16bb04a0aa7a85cd7f7831d06da775d5443478"],"state_sha256":"9a2a3ec34a912d39135e2e5d47d1634ac3efa65ea14643b552a915b8505a7c19"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VbqOCCUxacxB1BY8syi5/qkXHGqo8NSyHiOY12/B0CRpGhu7KZ40wHCAq0xxcYHGBIpV5m9ayTbyo8/YMaFeBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:39:43.097620Z","bundle_sha256":"861383d48905ddc44b43189cad0397b64d9c49287a4301d462faf5040b76bb23"}}