{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:UY5VMCTT24JEICVICE5S35IDIV","short_pith_number":"pith:UY5VMCTT","canonical_record":{"source":{"id":"1307.0820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-02T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"5f7f2697e0797b490b8f4a2c3d2b3c7ed071162e1e3fc16ee0ea9c8a03edefa9","abstract_canon_sha256":"d33cb11f4cfa4b8651504dfdee54113ee280bf072d570d410128e1de1edc1171"},"schema_version":"1.0"},"canonical_sha256":"a63b560a73d712440aa8113b2df50345670360b169e36622c04c8bd6893881b7","source":{"kind":"arxiv","id":"1307.0820","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0820","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0820v1","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0820","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"pith_short_12","alias_value":"UY5VMCTT24JE","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"UY5VMCTT24JEICVI","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"UY5VMCTT","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:UY5VMCTT24JEICVICE5S35IDIV","target":"record","payload":{"canonical_record":{"source":{"id":"1307.0820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-02T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"5f7f2697e0797b490b8f4a2c3d2b3c7ed071162e1e3fc16ee0ea9c8a03edefa9","abstract_canon_sha256":"d33cb11f4cfa4b8651504dfdee54113ee280bf072d570d410128e1de1edc1171"},"schema_version":"1.0"},"canonical_sha256":"a63b560a73d712440aa8113b2df50345670360b169e36622c04c8bd6893881b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:05:18.331218Z","signature_b64":"DT1G/Hs+plsYjzwufqin3K3feMznJiN05x1Er3h2o3iGxbRtL+hR/UtOIjxmjFzd3NjV84crI5joWQFUDfopBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a63b560a73d712440aa8113b2df50345670360b169e36622c04c8bd6893881b7","last_reissued_at":"2026-05-18T03:05:18.330716Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:05:18.330716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.0820","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":"2026-05-18T03:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cUdK49FZG8O3+zbnjNHabror7as2eF/PSs6Bb4gk6mlbdVKADrwVVYY7+cf7AuYRmBHxda2HOqSLJp/lbxG1DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T08:35:01.375272Z"},"content_sha256":"85a3fb82595a2107361266cf2cab561313680785d0028aca2f5d4a514b1b1a13","schema_version":"1.0","event_id":"sha256:85a3fb82595a2107361266cf2cab561313680785d0028aca2f5d4a514b1b1a13"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:UY5VMCTT24JEICVICE5S35IDIV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving Dark Energy Constraints with High Redshift Type Ia Supernovae from CANDELS and CLASH","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Adam G. Riess, Dan Coe, Irene Sendra, Marc Postman, Ruth Lazkoz, Steven A. Rodney, Tom Broadhurst, Vincenzo Salzano","submitted_at":"2013-07-02T20:00:03Z","abstract_excerpt":"Aims. We investigate the degree of improvement in dark energy constraints that can be achieved by extending Type Ia Supernova (SN Ia) samples to redshifts z > 1.5 with the Hubble Space Telescope (HST), particularly in the ongoing CANDELS and CLASH multi-cycle treasury programs.\n  Methods. Using the popular CPL parametrization of the dark energy, w = w0 +wa(1-a), we generate mock SN Ia samples that can be projected out to higher redshifts. The synthetic datasets thus generated are fitted to the CPL model, and we evaluate the improvement that a high-z sample can add in terms of ameliorating the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0820","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":"2026-05-18T03:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pib2VpEb/Fx2llV2K+FTbiymdWfeyc471mu+DzmKRiKZb1CkDjX67NlFKhTt6cmKA1VhGm1yuh9Wn8crFixVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T08:35:01.375966Z"},"content_sha256":"09eadc5911be15e3127bb95ee60aecdc1487887fcc91f874f6731ff86cf173e5","schema_version":"1.0","event_id":"sha256:09eadc5911be15e3127bb95ee60aecdc1487887fcc91f874f6731ff86cf173e5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UY5VMCTT24JEICVICE5S35IDIV/bundle.json","state_url":"https://pith.science/pith/UY5VMCTT24JEICVICE5S35IDIV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UY5VMCTT24JEICVICE5S35IDIV/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":"2026-05-26T08:35:01Z","links":{"resolver":"https://pith.science/pith/UY5VMCTT24JEICVICE5S35IDIV","bundle":"https://pith.science/pith/UY5VMCTT24JEICVICE5S35IDIV/bundle.json","state":"https://pith.science/pith/UY5VMCTT24JEICVICE5S35IDIV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UY5VMCTT24JEICVICE5S35IDIV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:UY5VMCTT24JEICVICE5S35IDIV","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":"d33cb11f4cfa4b8651504dfdee54113ee280bf072d570d410128e1de1edc1171","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-02T20:00:03Z","title_canon_sha256":"5f7f2697e0797b490b8f4a2c3d2b3c7ed071162e1e3fc16ee0ea9c8a03edefa9"},"schema_version":"1.0","source":{"id":"1307.0820","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0820","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0820v1","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0820","created_at":"2026-05-18T03:05:18Z"},{"alias_kind":"pith_short_12","alias_value":"UY5VMCTT24JE","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"UY5VMCTT24JEICVI","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"UY5VMCTT","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:09eadc5911be15e3127bb95ee60aecdc1487887fcc91f874f6731ff86cf173e5","target":"graph","created_at":"2026-05-18T03:05:18Z","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":"Aims. We investigate the degree of improvement in dark energy constraints that can be achieved by extending Type Ia Supernova (SN Ia) samples to redshifts z > 1.5 with the Hubble Space Telescope (HST), particularly in the ongoing CANDELS and CLASH multi-cycle treasury programs.\n  Methods. Using the popular CPL parametrization of the dark energy, w = w0 +wa(1-a), we generate mock SN Ia samples that can be projected out to higher redshifts. The synthetic datasets thus generated are fitted to the CPL model, and we evaluate the improvement that a high-z sample can add in terms of ameliorating the ","authors_text":"Adam G. Riess, Dan Coe, Irene Sendra, Marc Postman, Ruth Lazkoz, Steven A. Rodney, Tom Broadhurst, Vincenzo Salzano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-02T20:00:03Z","title":"Improving Dark Energy Constraints with High Redshift Type Ia Supernovae from CANDELS and CLASH"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0820","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":"sha256:85a3fb82595a2107361266cf2cab561313680785d0028aca2f5d4a514b1b1a13","target":"record","created_at":"2026-05-18T03:05:18Z","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":"d33cb11f4cfa4b8651504dfdee54113ee280bf072d570d410128e1de1edc1171","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-02T20:00:03Z","title_canon_sha256":"5f7f2697e0797b490b8f4a2c3d2b3c7ed071162e1e3fc16ee0ea9c8a03edefa9"},"schema_version":"1.0","source":{"id":"1307.0820","kind":"arxiv","version":1}},"canonical_sha256":"a63b560a73d712440aa8113b2df50345670360b169e36622c04c8bd6893881b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a63b560a73d712440aa8113b2df50345670360b169e36622c04c8bd6893881b7","first_computed_at":"2026-05-18T03:05:18.330716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:18.330716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DT1G/Hs+plsYjzwufqin3K3feMznJiN05x1Er3h2o3iGxbRtL+hR/UtOIjxmjFzd3NjV84crI5joWQFUDfopBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:18.331218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.0820","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85a3fb82595a2107361266cf2cab561313680785d0028aca2f5d4a514b1b1a13","sha256:09eadc5911be15e3127bb95ee60aecdc1487887fcc91f874f6731ff86cf173e5"],"state_sha256":"f3b2f706f127c06f15a11ac21602cd7ce959d3f68202973461f0f4088f1e2868"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"My8VrR6SXYnI5sbJ9T0xBbDEZvlk7zq5SPtpQi6Ov1Bl+WVxA+YKwIyFanNg6jeU2BYdpZ699vsXRCX/3LY+Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T08:35:01.379699Z","bundle_sha256":"25343c528ccbf6953b743bc19f218a91c630d3de1b18f5feac9ecd1afe02e606"}}