{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:XEPWKS4CGEOVZHCVB5CIWZU6QZ","short_pith_number":"pith:XEPWKS4C","canonical_record":{"source":{"id":"1702.04916","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-16T10:34:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"b44f0586543bcdbaafffc4fac8c4dd15ae2b2b128d434b0a9f1b739ea0ee0887","abstract_canon_sha256":"c6fb291f220ab82b1f808a32fa0b5f4ede703a297874c0bf4c26081ce66fc105"},"schema_version":"1.0"},"canonical_sha256":"b91f654b82311d5c9c550f448b669e8643dc30fd0db44e6de72a71b82a28e834","source":{"kind":"arxiv","id":"1702.04916","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04916","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04916v2","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04916","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"pith_short_12","alias_value":"XEPWKS4CGEOV","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XEPWKS4CGEOVZHCV","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XEPWKS4C","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:XEPWKS4CGEOVZHCVB5CIWZU6QZ","target":"record","payload":{"canonical_record":{"source":{"id":"1702.04916","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-16T10:34:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"b44f0586543bcdbaafffc4fac8c4dd15ae2b2b128d434b0a9f1b739ea0ee0887","abstract_canon_sha256":"c6fb291f220ab82b1f808a32fa0b5f4ede703a297874c0bf4c26081ce66fc105"},"schema_version":"1.0"},"canonical_sha256":"b91f654b82311d5c9c550f448b669e8643dc30fd0db44e6de72a71b82a28e834","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:44.050720Z","signature_b64":"dLR5CZg3DrvG/3YloGaaFLRMCfJ5vq+HbQCPKmOaUfxK7cfB45a43iPPU7S90SH1QCiCYBxrRvZ5w4bbTeVgCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b91f654b82311d5c9c550f448b669e8643dc30fd0db44e6de72a71b82a28e834","last_reissued_at":"2026-05-18T00:17:44.050009Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:44.050009Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.04916","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":"2026-05-18T00:17:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wB1E7uxrG/xW7gMmqoGLex28Dnd1k+iVKU9bQ1jJ8Xzcw9a5BQRIYdItYfWfXDURlBrpjv02pIbIyAygl/WUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T15:44:04.006934Z"},"content_sha256":"ebc01755ccb6e8b589e3173a7cef2afdcefbb5e8a99ea79e58ac34e19c934c07","schema_version":"1.0","event_id":"sha256:ebc01755ccb6e8b589e3173a7cef2afdcefbb5e8a99ea79e58ac34e19c934c07"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:XEPWKS4CGEOVZHCVB5CIWZU6QZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on a generalized deceleration parameter from cosmic chronometers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Abdulla Al Mamon","submitted_at":"2017-02-16T10:34:17Z","abstract_excerpt":"In this paper, we have proposed a generalized parametrization for the deceleration parameter $q$ in order to study the evolutionary history of the universe. We have shown that the proposed model can reproduce three well known $q$-parametrized models for some specific values of the model parameter $\\alpha$. We have used the latest compilation of the Hubble parameter measurements obtained from the cosmic chronometer (CC) method (in combination with the local value of the Hubble constant $H_{0}$) and the Type Ia supernova (SNIa) data to place constraints on the parameters of the model for differe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04916","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":"2026-05-18T00:17:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3nCKgY0qOkqSv7tsca9BQ+hsE20km0M3sEZ5zOwu2UBwSSDnv+xWbIpjQ9yjuDvz9wfciVCkdkFewDGvZc/QDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T15:44:04.007271Z"},"content_sha256":"dead58471c578ab2559f6808f7e1d8f66678a3a4f43b09a7d8adbdae86d9d227","schema_version":"1.0","event_id":"sha256:dead58471c578ab2559f6808f7e1d8f66678a3a4f43b09a7d8adbdae86d9d227"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/bundle.json","state_url":"https://pith.science/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/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":"2026-06-28T15:44:04Z","links":{"resolver":"https://pith.science/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ","bundle":"https://pith.science/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/bundle.json","state":"https://pith.science/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XEPWKS4CGEOVZHCVB5CIWZU6QZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XEPWKS4CGEOVZHCVB5CIWZU6QZ","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":"c6fb291f220ab82b1f808a32fa0b5f4ede703a297874c0bf4c26081ce66fc105","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-16T10:34:17Z","title_canon_sha256":"b44f0586543bcdbaafffc4fac8c4dd15ae2b2b128d434b0a9f1b739ea0ee0887"},"schema_version":"1.0","source":{"id":"1702.04916","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.04916","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"arxiv_version","alias_value":"1702.04916v2","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.04916","created_at":"2026-05-18T00:17:44Z"},{"alias_kind":"pith_short_12","alias_value":"XEPWKS4CGEOV","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"XEPWKS4CGEOVZHCV","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"XEPWKS4C","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:dead58471c578ab2559f6808f7e1d8f66678a3a4f43b09a7d8adbdae86d9d227","target":"graph","created_at":"2026-05-18T00:17:44Z","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":"In this paper, we have proposed a generalized parametrization for the deceleration parameter $q$ in order to study the evolutionary history of the universe. We have shown that the proposed model can reproduce three well known $q$-parametrized models for some specific values of the model parameter $\\alpha$. We have used the latest compilation of the Hubble parameter measurements obtained from the cosmic chronometer (CC) method (in combination with the local value of the Hubble constant $H_{0}$) and the Type Ia supernova (SNIa) data to place constraints on the parameters of the model for differe","authors_text":"Abdulla Al Mamon","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-16T10:34:17Z","title":"Constraints on a generalized deceleration parameter from cosmic chronometers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04916","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:ebc01755ccb6e8b589e3173a7cef2afdcefbb5e8a99ea79e58ac34e19c934c07","target":"record","created_at":"2026-05-18T00:17:44Z","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":"c6fb291f220ab82b1f808a32fa0b5f4ede703a297874c0bf4c26081ce66fc105","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-16T10:34:17Z","title_canon_sha256":"b44f0586543bcdbaafffc4fac8c4dd15ae2b2b128d434b0a9f1b739ea0ee0887"},"schema_version":"1.0","source":{"id":"1702.04916","kind":"arxiv","version":2}},"canonical_sha256":"b91f654b82311d5c9c550f448b669e8643dc30fd0db44e6de72a71b82a28e834","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b91f654b82311d5c9c550f448b669e8643dc30fd0db44e6de72a71b82a28e834","first_computed_at":"2026-05-18T00:17:44.050009Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:44.050009Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dLR5CZg3DrvG/3YloGaaFLRMCfJ5vq+HbQCPKmOaUfxK7cfB45a43iPPU7S90SH1QCiCYBxrRvZ5w4bbTeVgCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:44.050720Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.04916","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ebc01755ccb6e8b589e3173a7cef2afdcefbb5e8a99ea79e58ac34e19c934c07","sha256:dead58471c578ab2559f6808f7e1d8f66678a3a4f43b09a7d8adbdae86d9d227"],"state_sha256":"b81483167961f2e975e7704bee6def7bcdfd2058cbce82f4b8d550ec7c688181"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xMXJSiOskimJLLIGll9bzPNCczZgrwQvZB9XMEkG3pAxlNLeldNPbDK8Zg6Ino6NIo7KD6t/ebvnCw0l7scDBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T15:44:04.009137Z","bundle_sha256":"71147ea2cfb5b2442dcf1e933ca92bf1e2e951c1298b95b016d6368b6e538f5c"}}