{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:QK5RFSUYRKPQJDJ2H7EXUSRCUU","short_pith_number":"pith:QK5RFSUY","canonical_record":{"source":{"id":"1108.1424","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T23:20:46Z","cross_cats_sorted":[],"title_canon_sha256":"f27cb9fd4abdf68709aa9f44b6ff18a3dc500206f40d5febf2687b2eac82fb00","abstract_canon_sha256":"13dfc9cf61d53d364734107c8316c25c71e093912e9b6221edce1b5579f4ef7e"},"schema_version":"1.0"},"canonical_sha256":"82bb12ca988a9f048d3a3fc97a4a22a5110b241628faff8161864a935560294c","source":{"kind":"arxiv","id":"1108.1424","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.1424","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1108.1424v1","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1424","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"QK5RFSUYRKPQ","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QK5RFSUYRKPQJDJ2","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QK5RFSUY","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:QK5RFSUYRKPQJDJ2H7EXUSRCUU","target":"record","payload":{"canonical_record":{"source":{"id":"1108.1424","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T23:20:46Z","cross_cats_sorted":[],"title_canon_sha256":"f27cb9fd4abdf68709aa9f44b6ff18a3dc500206f40d5febf2687b2eac82fb00","abstract_canon_sha256":"13dfc9cf61d53d364734107c8316c25c71e093912e9b6221edce1b5579f4ef7e"},"schema_version":"1.0"},"canonical_sha256":"82bb12ca988a9f048d3a3fc97a4a22a5110b241628faff8161864a935560294c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:00.879641Z","signature_b64":"ixNnlH+JwBcmgsAKb4/t0qjVKtWwQNqMq+HxMa211kBzN9kDdItwj5L+V576WtACkSWzLTiL1TNky8tq6A61AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82bb12ca988a9f048d3a3fc97a4a22a5110b241628faff8161864a935560294c","last_reissued_at":"2026-05-18T02:01:00.879177Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:00.879177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.1424","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":"2026-05-18T02:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p/pJ0lpp2Tu81xR/gKBRZC/0GVXUlEJ+xiOADYvzxTzLoKt1GBf76qFdyRd/b9OZVnvk7mQwXH7UTqmkrY8zAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:18:30.319851Z"},"content_sha256":"d249e1dd607176c3b0527d52537307ff16346710b29d7b1feaf870a2eb0ec64a","schema_version":"1.0","event_id":"sha256:d249e1dd607176c3b0527d52537307ff16346710b29d7b1feaf870a2eb0ec64a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:QK5RFSUYRKPQJDJ2H7EXUSRCUU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Confronting Tracker Field Quintessence with Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Chien-Wen Chen, Pao-Yu Wang, Pisin Chen","submitted_at":"2011-08-05T23:20:46Z","abstract_excerpt":"We confront tracker field quintessence with observational data. The potentials considered in this paper include $V(\\phi)\\propto\\phi^{-\\alpha}$, $\\exp(M_{p}/\\phi)$, $\\exp(M_{p}/\\phi)-1$, $\\exp(\\beta M_{p}/\\phi)$ and $\\exp(\\gamma M_{p}/\\phi)-1$; while the data come from the latest SN Ia, CMB and BAO observations. Stringent parameter constraints are obtained. In comparison with the cosmological constant via information criteria, it is found that models with potentials $\\exp(M_{p}/\\phi)$, $\\exp(M_{p}/\\phi)-1$ and $\\exp(\\gamma M_{p}/\\phi)-1$ are not supported by the current data."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1424","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":""},"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":"2026-05-18T02:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bzd0jiNnikgbdjo84jFblgd6VsCKqTBBpQmJCg7l5o/ObHrELZo65f/qtN81pPXX5qZhHZek00VnzA2Zc1OeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:18:30.320195Z"},"content_sha256":"a44405cc10e5b7e8454c1d6bde9bc94d1774e6970fe254c115ee05aba2027ab3","schema_version":"1.0","event_id":"sha256:a44405cc10e5b7e8454c1d6bde9bc94d1774e6970fe254c115ee05aba2027ab3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/bundle.json","state_url":"https://pith.science/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/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":"2026-07-01T17:18:30Z","links":{"resolver":"https://pith.science/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU","bundle":"https://pith.science/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/bundle.json","state":"https://pith.science/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QK5RFSUYRKPQJDJ2H7EXUSRCUU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QK5RFSUYRKPQJDJ2H7EXUSRCUU","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":"13dfc9cf61d53d364734107c8316c25c71e093912e9b6221edce1b5579f4ef7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T23:20:46Z","title_canon_sha256":"f27cb9fd4abdf68709aa9f44b6ff18a3dc500206f40d5febf2687b2eac82fb00"},"schema_version":"1.0","source":{"id":"1108.1424","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.1424","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1108.1424v1","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1424","created_at":"2026-05-18T02:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"QK5RFSUYRKPQ","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QK5RFSUYRKPQJDJ2","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QK5RFSUY","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:a44405cc10e5b7e8454c1d6bde9bc94d1774e6970fe254c115ee05aba2027ab3","target":"graph","created_at":"2026-05-18T02:01:00Z","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 confront tracker field quintessence with observational data. The potentials considered in this paper include $V(\\phi)\\propto\\phi^{-\\alpha}$, $\\exp(M_{p}/\\phi)$, $\\exp(M_{p}/\\phi)-1$, $\\exp(\\beta M_{p}/\\phi)$ and $\\exp(\\gamma M_{p}/\\phi)-1$; while the data come from the latest SN Ia, CMB and BAO observations. Stringent parameter constraints are obtained. In comparison with the cosmological constant via information criteria, it is found that models with potentials $\\exp(M_{p}/\\phi)$, $\\exp(M_{p}/\\phi)-1$ and $\\exp(\\gamma M_{p}/\\phi)-1$ are not supported by the current data.","authors_text":"Chien-Wen Chen, Pao-Yu Wang, Pisin Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T23:20:46Z","title":"Confronting Tracker Field Quintessence with Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1424","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:d249e1dd607176c3b0527d52537307ff16346710b29d7b1feaf870a2eb0ec64a","target":"record","created_at":"2026-05-18T02:01:00Z","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":"13dfc9cf61d53d364734107c8316c25c71e093912e9b6221edce1b5579f4ef7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-05T23:20:46Z","title_canon_sha256":"f27cb9fd4abdf68709aa9f44b6ff18a3dc500206f40d5febf2687b2eac82fb00"},"schema_version":"1.0","source":{"id":"1108.1424","kind":"arxiv","version":1}},"canonical_sha256":"82bb12ca988a9f048d3a3fc97a4a22a5110b241628faff8161864a935560294c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82bb12ca988a9f048d3a3fc97a4a22a5110b241628faff8161864a935560294c","first_computed_at":"2026-05-18T02:01:00.879177Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:00.879177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ixNnlH+JwBcmgsAKb4/t0qjVKtWwQNqMq+HxMa211kBzN9kDdItwj5L+V576WtACkSWzLTiL1TNky8tq6A61AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:00.879641Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.1424","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d249e1dd607176c3b0527d52537307ff16346710b29d7b1feaf870a2eb0ec64a","sha256:a44405cc10e5b7e8454c1d6bde9bc94d1774e6970fe254c115ee05aba2027ab3"],"state_sha256":"a3309b995238975f35b0411fd5b481594259e05ff42fa305e83733582952fe0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7icaGsKQZLWwDpZMYq/4dYsKogfu2JBETcxQol2zSpCqyg9CBwHRFHbocz9irVrL7OYq5EUMOWwLNbawI89nCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T17:18:30.322105Z","bundle_sha256":"9f3793f85e9e02ebef6c8ab3b8672a0ed35fe194619905e91960e602bf72c70d"}}