{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:A3HUKB2EYTC4DSYXASSD2Y6TB3","short_pith_number":"pith:A3HUKB2E","canonical_record":{"source":{"id":"1008.2182","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-12T18:33:39Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"c76d87570315e6ed100cbab1c3d4d2a3cb87452b2c34065f565f4ba7b95d8b40","abstract_canon_sha256":"9cf1e52e3651dbaf2c0a21489782dab01a804ac81f464cebeda5bdbfa974856d"},"schema_version":"1.0"},"canonical_sha256":"06cf450744c4c5c1cb1704a43d63d30edf2c4890ff6ce9d6730b9657ef737fcd","source":{"kind":"arxiv","id":"1008.2182","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2182","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2182v3","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2182","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"pith_short_12","alias_value":"A3HUKB2EYTC4","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"A3HUKB2EYTC4DSYX","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"A3HUKB2E","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:A3HUKB2EYTC4DSYXASSD2Y6TB3","target":"record","payload":{"canonical_record":{"source":{"id":"1008.2182","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-12T18:33:39Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"c76d87570315e6ed100cbab1c3d4d2a3cb87452b2c34065f565f4ba7b95d8b40","abstract_canon_sha256":"9cf1e52e3651dbaf2c0a21489782dab01a804ac81f464cebeda5bdbfa974856d"},"schema_version":"1.0"},"canonical_sha256":"06cf450744c4c5c1cb1704a43d63d30edf2c4890ff6ce9d6730b9657ef737fcd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:07:41.830827Z","signature_b64":"1z7D8DN/ZbWQxTmByvGJIa0egXXY8wDQ3Co6nUCIsj4NvdJPvxT4b3B+633piTUQp8tn9RBMwCYCeH4/b73nAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06cf450744c4c5c1cb1704a43d63d30edf2c4890ff6ce9d6730b9657ef737fcd","last_reissued_at":"2026-05-18T04:07:41.830342Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:07:41.830342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.2182","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":"2026-05-18T04:07:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aZ/bL36ixeg5AbNnq6OkM3BAXc3O+BzQGIRxjZgdAm9Jk1Gi7vZoIXhiLvI5dur882t/WF9v8JUIvnuJR7t1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:33:44.687378Z"},"content_sha256":"7202d0abb4191177333109374a5e1426a982d969c53c1cb7ab08938709911877","schema_version":"1.0","event_id":"sha256:7202d0abb4191177333109374a5e1426a982d969c53c1cb7ab08938709911877"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:A3HUKB2EYTC4DSYXASSD2Y6TB3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observational constraints on phantom power-law cosmology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Burin Gumjudpai (IF, Chakkrit Kaeonikhom (IF, Chongqing), Emmanuel N. Saridakis (CUPT, Naresuan U.)","submitted_at":"2010-08-12T18:33:39Z","abstract_excerpt":"We investigate phantom cosmology in which the scale factor is a power law, and we use cosmological observations from Cosmic Microwave Background (CMB), Baryon Acoustic Oscillations (BAO) and observational Hubble data, in order to impose complete constraints on the model parameters. We find that the power-law exponent is $\\beta\\approx-6.51^{+0.24}_{-0.25}$, while the Big Rip is realized at $t_s\\approx104.5^{+1.9}_{-2.0}$ Gyr, in 1$\\sigma$ confidence level. Providing late-time asymptotic expressions, we find that the dark-energy equation-of-state parameter at the Big Rip remains finite and equal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2182","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":""},"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":"2026-05-18T04:07:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DP6ZVnhS+q9RNGs4zYskwHYLSxNpeXhuwuNOMJiwzxoayIlkRKYPvc3It9CKiSvpFcoeCyIY0rSpQEQ8K4UWBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:33:44.688132Z"},"content_sha256":"df56ae572bf2a6bd59cbeca890f680ab6a3fe5bdda6d6f568cc90c5fa51cc9ab","schema_version":"1.0","event_id":"sha256:df56ae572bf2a6bd59cbeca890f680ab6a3fe5bdda6d6f568cc90c5fa51cc9ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/bundle.json","state_url":"https://pith.science/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/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":"2026-05-31T14:33:44Z","links":{"resolver":"https://pith.science/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3","bundle":"https://pith.science/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/bundle.json","state":"https://pith.science/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A3HUKB2EYTC4DSYXASSD2Y6TB3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:A3HUKB2EYTC4DSYXASSD2Y6TB3","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":"9cf1e52e3651dbaf2c0a21489782dab01a804ac81f464cebeda5bdbfa974856d","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-12T18:33:39Z","title_canon_sha256":"c76d87570315e6ed100cbab1c3d4d2a3cb87452b2c34065f565f4ba7b95d8b40"},"schema_version":"1.0","source":{"id":"1008.2182","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2182","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2182v3","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2182","created_at":"2026-05-18T04:07:41Z"},{"alias_kind":"pith_short_12","alias_value":"A3HUKB2EYTC4","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"A3HUKB2EYTC4DSYX","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"A3HUKB2E","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:df56ae572bf2a6bd59cbeca890f680ab6a3fe5bdda6d6f568cc90c5fa51cc9ab","target":"graph","created_at":"2026-05-18T04:07:41Z","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":"We investigate phantom cosmology in which the scale factor is a power law, and we use cosmological observations from Cosmic Microwave Background (CMB), Baryon Acoustic Oscillations (BAO) and observational Hubble data, in order to impose complete constraints on the model parameters. We find that the power-law exponent is $\\beta\\approx-6.51^{+0.24}_{-0.25}$, while the Big Rip is realized at $t_s\\approx104.5^{+1.9}_{-2.0}$ Gyr, in 1$\\sigma$ confidence level. Providing late-time asymptotic expressions, we find that the dark-energy equation-of-state parameter at the Big Rip remains finite and equal","authors_text":"Burin Gumjudpai (IF, Chakkrit Kaeonikhom (IF, Chongqing), Emmanuel N. Saridakis (CUPT, Naresuan U.)","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-12T18:33:39Z","title":"Observational constraints on phantom power-law cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2182","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":"sha256:7202d0abb4191177333109374a5e1426a982d969c53c1cb7ab08938709911877","target":"record","created_at":"2026-05-18T04:07:41Z","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":"9cf1e52e3651dbaf2c0a21489782dab01a804ac81f464cebeda5bdbfa974856d","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-08-12T18:33:39Z","title_canon_sha256":"c76d87570315e6ed100cbab1c3d4d2a3cb87452b2c34065f565f4ba7b95d8b40"},"schema_version":"1.0","source":{"id":"1008.2182","kind":"arxiv","version":3}},"canonical_sha256":"06cf450744c4c5c1cb1704a43d63d30edf2c4890ff6ce9d6730b9657ef737fcd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06cf450744c4c5c1cb1704a43d63d30edf2c4890ff6ce9d6730b9657ef737fcd","first_computed_at":"2026-05-18T04:07:41.830342Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:41.830342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1z7D8DN/ZbWQxTmByvGJIa0egXXY8wDQ3Co6nUCIsj4NvdJPvxT4b3B+633piTUQp8tn9RBMwCYCeH4/b73nAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:41.830827Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.2182","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7202d0abb4191177333109374a5e1426a982d969c53c1cb7ab08938709911877","sha256:df56ae572bf2a6bd59cbeca890f680ab6a3fe5bdda6d6f568cc90c5fa51cc9ab"],"state_sha256":"f502b1b1c157a8ddb38ac423da7510d2d8e28befffd3449c19d27bc3d8424027"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i9K3Wvf2Hy67aO53iQqqI1El3mkHJUIGjhNLt382rN6kPDRTWnEnDTP2ftQD/h0Tf851Fn6qfPX8XUfkhE+XAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T14:33:44.693253Z","bundle_sha256":"07fa8593276e85b41cb000f6621bf2f0ef297ba9d0316fc8aed96d65b7cd9401"}}