{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:OYCZNWZBSVLGKRNP3FME4DY2FY","short_pith_number":"pith:OYCZNWZB","canonical_record":{"source":{"id":"1306.1272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-06T00:48:21Z","cross_cats_sorted":[],"title_canon_sha256":"c0febe41a53793eb8e200e2c8b3bdc3a9a948e3c1a711c840b7ca8f021a81c7f","abstract_canon_sha256":"0ae5d2891df46c0db41254ef6abbe8ac3bde7bb9ab6688e015ad3e0359275241"},"schema_version":"1.0"},"canonical_sha256":"760596db2195566545afd9584e0f1a2e0ed8206fcb2138550c20b681a5a306a9","source":{"kind":"arxiv","id":"1306.1272","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1272","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1272v1","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1272","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"OYCZNWZBSVLG","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OYCZNWZBSVLGKRNP","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OYCZNWZB","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:OYCZNWZBSVLGKRNP3FME4DY2FY","target":"record","payload":{"canonical_record":{"source":{"id":"1306.1272","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-06T00:48:21Z","cross_cats_sorted":[],"title_canon_sha256":"c0febe41a53793eb8e200e2c8b3bdc3a9a948e3c1a711c840b7ca8f021a81c7f","abstract_canon_sha256":"0ae5d2891df46c0db41254ef6abbe8ac3bde7bb9ab6688e015ad3e0359275241"},"schema_version":"1.0"},"canonical_sha256":"760596db2195566545afd9584e0f1a2e0ed8206fcb2138550c20b681a5a306a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:42.844091Z","signature_b64":"iClltdIDmSSNFKH2tZv76pgpbPnXg02EBq+6uniLmEJhTqCZQyvY0i4wHvPZBHLHIPcS+EC4LVKZUD0luWdCAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"760596db2195566545afd9584e0f1a2e0ed8206fcb2138550c20b681a5a306a9","last_reissued_at":"2026-05-18T03:21:42.843451Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:42.843451Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.1272","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":"2026-05-18T03:21:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RBHKqXt8l+2dpzrvnWBhd/BHOGYh2cDruCDebWWaYcz1Mao3klxj83liBIynvauM5F3h/47uLy+JfdmwhVNJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:34:22.808529Z"},"content_sha256":"1b25e3d3f574d880d400c7211d1990f74e3c92372b5c55417c6f179a4b83dfa7","schema_version":"1.0","event_id":"sha256:1b25e3d3f574d880d400c7211d1990f74e3c92372b5c55417c6f179a4b83dfa7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:OYCZNWZBSVLGKRNP3FME4DY2FY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dark energy with gravitational lens time delays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A.Fritz, A.I.Zabludoff, C.D.Fassnacht, C.Giocoli, C.R.Keeton, C.S.Kochanek, D.A.Finley, D.A.Howell, D.Zaritsky, E.Buckley-Geer, E.E.Falco, E.Komatsu, E.V.Linder, F.Courbin, F.-Y.Cyr-Racine, G.Dobler, G.Meylan, G.Seidel, J.Hjorth, K.C.Wong, L.A.Moustakas, L.V.E.Koopmans, M.Bradac, M.Oguri, M.Tewes, N.Jackson, P.J.Marshall, P.Natarajan, R.B.Metcalf, R.Cabanac, R.J.Brunner, S.H.Suyu, S.Lopez, T.Anguita, T.Collett, T.Treu, T.Verdugo, V.Motta","submitted_at":"2013-06-06T00:48:21Z","abstract_excerpt":"Strong lensing gravitational time delays are a powerful and cost effective probe of dark energy. Recent studies have shown that a single lens can provide a distance measurement with 6-7 % accuracy (including random and systematic uncertainties), provided sufficient data are available to determine the time delay and reconstruct the gravitational potential of the deflector. Gravitational-time delays are a low redshift (z~0-2) probe and thus allow one to break degeneracies in the interpretation of data from higher-redshift probes like the cosmic microwave background in terms of the dark energy eq"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1272","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":"2026-05-18T03:21:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1xMw4qsRHKZtgEUVzp9Sw6PJnMcBFa5LJ++l6CQ7R8Tq+WbWZpGsPf8Zcd8CH2BVPbrfD+ieceQTbSgd8S1gBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:34:22.808901Z"},"content_sha256":"2f0bcaff9f10935737bc065d0861c618cb5f2da0a7d004a2d2cb057b3f86ee8d","schema_version":"1.0","event_id":"sha256:2f0bcaff9f10935737bc065d0861c618cb5f2da0a7d004a2d2cb057b3f86ee8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/bundle.json","state_url":"https://pith.science/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/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":"2026-05-27T16:34:22Z","links":{"resolver":"https://pith.science/pith/OYCZNWZBSVLGKRNP3FME4DY2FY","bundle":"https://pith.science/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/bundle.json","state":"https://pith.science/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OYCZNWZBSVLGKRNP3FME4DY2FY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:OYCZNWZBSVLGKRNP3FME4DY2FY","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":"0ae5d2891df46c0db41254ef6abbe8ac3bde7bb9ab6688e015ad3e0359275241","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-06T00:48:21Z","title_canon_sha256":"c0febe41a53793eb8e200e2c8b3bdc3a9a948e3c1a711c840b7ca8f021a81c7f"},"schema_version":"1.0","source":{"id":"1306.1272","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1272","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1272v1","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1272","created_at":"2026-05-18T03:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"OYCZNWZBSVLG","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OYCZNWZBSVLGKRNP","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OYCZNWZB","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:2f0bcaff9f10935737bc065d0861c618cb5f2da0a7d004a2d2cb057b3f86ee8d","target":"graph","created_at":"2026-05-18T03:21:42Z","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":"Strong lensing gravitational time delays are a powerful and cost effective probe of dark energy. Recent studies have shown that a single lens can provide a distance measurement with 6-7 % accuracy (including random and systematic uncertainties), provided sufficient data are available to determine the time delay and reconstruct the gravitational potential of the deflector. Gravitational-time delays are a low redshift (z~0-2) probe and thus allow one to break degeneracies in the interpretation of data from higher-redshift probes like the cosmic microwave background in terms of the dark energy eq","authors_text":"A.Fritz, A.I.Zabludoff, C.D.Fassnacht, C.Giocoli, C.R.Keeton, C.S.Kochanek, D.A.Finley, D.A.Howell, D.Zaritsky, E.Buckley-Geer, E.E.Falco, E.Komatsu, E.V.Linder, F.Courbin, F.-Y.Cyr-Racine, G.Dobler, G.Meylan, G.Seidel, J.Hjorth, K.C.Wong, L.A.Moustakas, L.V.E.Koopmans, M.Bradac, M.Oguri, M.Tewes, N.Jackson, P.J.Marshall, P.Natarajan, R.B.Metcalf, R.Cabanac, R.J.Brunner, S.H.Suyu, S.Lopez, T.Anguita, T.Collett, T.Treu, T.Verdugo, V.Motta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-06T00:48:21Z","title":"Dark energy with gravitational lens time delays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1272","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":"sha256:1b25e3d3f574d880d400c7211d1990f74e3c92372b5c55417c6f179a4b83dfa7","target":"record","created_at":"2026-05-18T03:21:42Z","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":"0ae5d2891df46c0db41254ef6abbe8ac3bde7bb9ab6688e015ad3e0359275241","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-06T00:48:21Z","title_canon_sha256":"c0febe41a53793eb8e200e2c8b3bdc3a9a948e3c1a711c840b7ca8f021a81c7f"},"schema_version":"1.0","source":{"id":"1306.1272","kind":"arxiv","version":1}},"canonical_sha256":"760596db2195566545afd9584e0f1a2e0ed8206fcb2138550c20b681a5a306a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"760596db2195566545afd9584e0f1a2e0ed8206fcb2138550c20b681a5a306a9","first_computed_at":"2026-05-18T03:21:42.843451Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:42.843451Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iClltdIDmSSNFKH2tZv76pgpbPnXg02EBq+6uniLmEJhTqCZQyvY0i4wHvPZBHLHIPcS+EC4LVKZUD0luWdCAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:42.844091Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.1272","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b25e3d3f574d880d400c7211d1990f74e3c92372b5c55417c6f179a4b83dfa7","sha256:2f0bcaff9f10935737bc065d0861c618cb5f2da0a7d004a2d2cb057b3f86ee8d"],"state_sha256":"cee7db4ff0d8e3cb408493030f3241025475338ad84f7978388e19e3b2562a60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mE5DmaSXZhlpRhb17Yxbq56HiayvXkNwqFZiiS9vIbOKDlfeAYtBYzxHR+iTW+sYKVYtXFUsJzl1Nb/uCBuJBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:34:22.811765Z","bundle_sha256":"40a9019999d03bc5db41c49c5069dec4558ec6a2e5247004b6081415e4cd1482"}}