{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:LEQG2G7SPYWQJITHD2PDQRUWLC","short_pith_number":"pith:LEQG2G7S","canonical_record":{"source":{"id":"1301.4611","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-19T23:46:54Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"b367fc3f13223d766b13cb5762932df16aeabe79b355c681e204c331ed1ebee4","abstract_canon_sha256":"171cc4de2c95c968fdcb663604911617b75a71357b2650b71c9e974d9ccb4a39"},"schema_version":"1.0"},"canonical_sha256":"59206d1bf27e2d04a2671e9e384696589c77a57e06583a6dbe13eae15283e83a","source":{"kind":"arxiv","id":"1301.4611","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.4611","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"arxiv_version","alias_value":"1301.4611v2","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4611","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"pith_short_12","alias_value":"LEQG2G7SPYWQ","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LEQG2G7SPYWQJITH","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LEQG2G7S","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:LEQG2G7SPYWQJITHD2PDQRUWLC","target":"record","payload":{"canonical_record":{"source":{"id":"1301.4611","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-19T23:46:54Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"b367fc3f13223d766b13cb5762932df16aeabe79b355c681e204c331ed1ebee4","abstract_canon_sha256":"171cc4de2c95c968fdcb663604911617b75a71357b2650b71c9e974d9ccb4a39"},"schema_version":"1.0"},"canonical_sha256":"59206d1bf27e2d04a2671e9e384696589c77a57e06583a6dbe13eae15283e83a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:05.501791Z","signature_b64":"72mkBL/He5YUhjh92I2uQ7S1KDyn9h1dIgY0rqz+1gYFLjlCoSsHM3pFqYkIk6ninBu7PAQwJ4xTPktEQBEUCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59206d1bf27e2d04a2671e9e384696589c77a57e06583a6dbe13eae15283e83a","last_reissued_at":"2026-05-18T01:52:05.501253Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:05.501253Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.4611","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":"2026-05-18T01:52:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8kmZn6Z7mbKGZFjyk8ZnfZbxh9zCQFSI+hFnFaIfx7hPe/xOlmORCzshyqpGNY6pv2vDIHVUJH10RZVIOlFDDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:29:00.408658Z"},"content_sha256":"d20098c5cd023c7ca8ee65d686550ccbf4ccb785ff1280fd0000face77a293ef","schema_version":"1.0","event_id":"sha256:d20098c5cd023c7ca8ee65d686550ccbf4ccb785ff1280fd0000face77a293ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:LEQG2G7SPYWQJITHD2PDQRUWLC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A one-parameter formula for testing slow-roll dark energy: observational prospects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Joel Zinn, J. Richard Gott III, Zachary Slepian","submitted_at":"2013-01-19T23:46:54Z","abstract_excerpt":"Numerous upcoming observations, such as WFIRST, BOSS, BigBOSS, LSST, Euclid, and Planck, will constrain dark energy (DE)'s equation of state with great precision. They may well find the ratio of pressure to energy density, $w$, is -1, meaning DE is equivalent to a cosmological constant. However, many time-varying DE models have also been proposed. A single parametrization to test a broad class of them and that is itself motivated by a physical picture is therefore desirable. We suggest the simplest model of DE has the same mechanism as inflation, likely a scalar field slowly rolling down its p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4611","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":"2026-05-18T01:52:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tWCYRwyGtZaiqwP8tFLCuj4KcV0pL2zDZBQQAxwO+KahJABNlWs97RZMBUUhQDrdBFgpiuzIL+VlMxxly653Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:29:00.409005Z"},"content_sha256":"c5ff297d0b6f10e88cd6dee5115ab86efe2bc068428ba9231a161fa7809557a5","schema_version":"1.0","event_id":"sha256:c5ff297d0b6f10e88cd6dee5115ab86efe2bc068428ba9231a161fa7809557a5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/bundle.json","state_url":"https://pith.science/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/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":"2026-06-27T08:29:00Z","links":{"resolver":"https://pith.science/pith/LEQG2G7SPYWQJITHD2PDQRUWLC","bundle":"https://pith.science/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/bundle.json","state":"https://pith.science/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LEQG2G7SPYWQJITHD2PDQRUWLC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:LEQG2G7SPYWQJITHD2PDQRUWLC","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":"171cc4de2c95c968fdcb663604911617b75a71357b2650b71c9e974d9ccb4a39","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-19T23:46:54Z","title_canon_sha256":"b367fc3f13223d766b13cb5762932df16aeabe79b355c681e204c331ed1ebee4"},"schema_version":"1.0","source":{"id":"1301.4611","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.4611","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"arxiv_version","alias_value":"1301.4611v2","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.4611","created_at":"2026-05-18T01:52:05Z"},{"alias_kind":"pith_short_12","alias_value":"LEQG2G7SPYWQ","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LEQG2G7SPYWQJITH","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LEQG2G7S","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:c5ff297d0b6f10e88cd6dee5115ab86efe2bc068428ba9231a161fa7809557a5","target":"graph","created_at":"2026-05-18T01:52:05Z","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":"Numerous upcoming observations, such as WFIRST, BOSS, BigBOSS, LSST, Euclid, and Planck, will constrain dark energy (DE)'s equation of state with great precision. They may well find the ratio of pressure to energy density, $w$, is -1, meaning DE is equivalent to a cosmological constant. However, many time-varying DE models have also been proposed. A single parametrization to test a broad class of them and that is itself motivated by a physical picture is therefore desirable. We suggest the simplest model of DE has the same mechanism as inflation, likely a scalar field slowly rolling down its p","authors_text":"Joel Zinn, J. Richard Gott III, Zachary Slepian","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-19T23:46:54Z","title":"A one-parameter formula for testing slow-roll dark energy: observational prospects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4611","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:d20098c5cd023c7ca8ee65d686550ccbf4ccb785ff1280fd0000face77a293ef","target":"record","created_at":"2026-05-18T01:52:05Z","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":"171cc4de2c95c968fdcb663604911617b75a71357b2650b71c9e974d9ccb4a39","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-19T23:46:54Z","title_canon_sha256":"b367fc3f13223d766b13cb5762932df16aeabe79b355c681e204c331ed1ebee4"},"schema_version":"1.0","source":{"id":"1301.4611","kind":"arxiv","version":2}},"canonical_sha256":"59206d1bf27e2d04a2671e9e384696589c77a57e06583a6dbe13eae15283e83a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59206d1bf27e2d04a2671e9e384696589c77a57e06583a6dbe13eae15283e83a","first_computed_at":"2026-05-18T01:52:05.501253Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:05.501253Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"72mkBL/He5YUhjh92I2uQ7S1KDyn9h1dIgY0rqz+1gYFLjlCoSsHM3pFqYkIk6ninBu7PAQwJ4xTPktEQBEUCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:05.501791Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.4611","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d20098c5cd023c7ca8ee65d686550ccbf4ccb785ff1280fd0000face77a293ef","sha256:c5ff297d0b6f10e88cd6dee5115ab86efe2bc068428ba9231a161fa7809557a5"],"state_sha256":"7c2ef9308d3a08ddb6bddea19ddb22c5125dd1c8a6e923ad840b56e6914a93ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mnYSjDAuYbZE/sprjZ0PfUcybZPDur2Yrp0yHVp6SpA0vk0Vp1BtrrSvNvcQ+fct4a1ihJ1fSuiB0weQGUkOAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T08:29:00.410888Z","bundle_sha256":"938567f86f9f1c778a8255cda1aa9f82b844cabaebe159a02c08bad12e6f4c16"}}