{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TQYP4WMWVHFAVWDVK6TFJS2ANQ","short_pith_number":"pith:TQYP4WMW","canonical_record":{"source":{"id":"1508.05361","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-17T20:05:53Z","cross_cats_sorted":[],"title_canon_sha256":"cca30323b37a5dd0d3e5b0610e62aa834bc66505d5674318a5822da170de7236","abstract_canon_sha256":"22ee704eaad0eba9d56e0726fecf78b2ebd503d28e697fd13152c5ed92025d2d"},"schema_version":"1.0"},"canonical_sha256":"9c30fe5996a9ca0ad87557a654cb406c3924aba305907cff74ba2b53e5ff444b","source":{"kind":"arxiv","id":"1508.05361","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05361","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05361v2","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05361","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"pith_short_12","alias_value":"TQYP4WMWVHFA","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TQYP4WMWVHFAVWDV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TQYP4WMW","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TQYP4WMWVHFAVWDVK6TFJS2ANQ","target":"record","payload":{"canonical_record":{"source":{"id":"1508.05361","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-17T20:05:53Z","cross_cats_sorted":[],"title_canon_sha256":"cca30323b37a5dd0d3e5b0610e62aa834bc66505d5674318a5822da170de7236","abstract_canon_sha256":"22ee704eaad0eba9d56e0726fecf78b2ebd503d28e697fd13152c5ed92025d2d"},"schema_version":"1.0"},"canonical_sha256":"9c30fe5996a9ca0ad87557a654cb406c3924aba305907cff74ba2b53e5ff444b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:55.690521Z","signature_b64":"R0PA7xZbT0lA8SYTBiUJN6iejz5w9n9gR7K1LHM2VSHnGl9bRX1sPQJpk/bT95Ih1H8sxCRx8xDqOmO3QJ7iCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9c30fe5996a9ca0ad87557a654cb406c3924aba305907cff74ba2b53e5ff444b","last_reissued_at":"2026-05-18T01:23:55.690000Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:55.690000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.05361","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":"2026-05-18T01:23:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RoNQQf+rW/4XSU68ni3Cxl977oey2qYuBXMb/S/Al3RDxQGInmdt6kLJVCa8WF22K+NzXqLVztkx9jQV1+TDAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:24:55.637628Z"},"content_sha256":"9e5059a3af7e5b7c2ed3cb6edda1b3d94ff3939fd9370212fa234dc10cc0bc97","schema_version":"1.0","event_id":"sha256:9e5059a3af7e5b7c2ed3cb6edda1b3d94ff3939fd9370212fa234dc10cc0bc97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TQYP4WMWVHFAVWDVK6TFJS2ANQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. G. Riess, A. Rest, C. Tang, C. W. Stubbs, D. Finkbeiner, D. Scolnic, E. A. Magnier, E. Schlafly, H. Flewelling, K. C. Chambers, K. W. Hodapp, M. E. Huber, N. Kaiser, N. Metcalfe, P. W. Draper, R. J. Foley, R. P. Kudritzki, S. Casertano, W. S. Burgett","submitted_at":"2015-08-17T20:05:53Z","abstract_excerpt":"Current cosmological analyses which use Type Ia supernova (SN Ia) observations combine SN samples to expand the redshift range beyond that of a single sample and increase the overall sample size. The inhomogeneous photometric calibration between different SN samples is one of the largest systematic uncertainties of the cosmological parameter estimation. To place these different samples on a single system, analyses currently use observations of a small sample of very bright flux standards on the $HST$ system. We propose a complementary method, called `Supercal', in which we use measurements of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05361","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":"2026-05-18T01:23:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wYohkx47ZaoqTfFkWSQQeo3VMXqQtg5MII3zUZn9opmxx1J1m2gftK8SnINceBYI3feAFFdb+4iYs9b3SEh9Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:24:55.637980Z"},"content_sha256":"9df606a75bc0b26480c00a238c706790637be43708f0ff758c5f955c6f4a5a83","schema_version":"1.0","event_id":"sha256:9df606a75bc0b26480c00a238c706790637be43708f0ff758c5f955c6f4a5a83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/bundle.json","state_url":"https://pith.science/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/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":"2026-05-30T14:24:55Z","links":{"resolver":"https://pith.science/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ","bundle":"https://pith.science/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/bundle.json","state":"https://pith.science/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TQYP4WMWVHFAVWDVK6TFJS2ANQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TQYP4WMWVHFAVWDVK6TFJS2ANQ","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":"22ee704eaad0eba9d56e0726fecf78b2ebd503d28e697fd13152c5ed92025d2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-17T20:05:53Z","title_canon_sha256":"cca30323b37a5dd0d3e5b0610e62aa834bc66505d5674318a5822da170de7236"},"schema_version":"1.0","source":{"id":"1508.05361","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05361","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05361v2","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05361","created_at":"2026-05-18T01:23:55Z"},{"alias_kind":"pith_short_12","alias_value":"TQYP4WMWVHFA","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TQYP4WMWVHFAVWDV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TQYP4WMW","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:9df606a75bc0b26480c00a238c706790637be43708f0ff758c5f955c6f4a5a83","target":"graph","created_at":"2026-05-18T01:23:55Z","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":"Current cosmological analyses which use Type Ia supernova (SN Ia) observations combine SN samples to expand the redshift range beyond that of a single sample and increase the overall sample size. The inhomogeneous photometric calibration between different SN samples is one of the largest systematic uncertainties of the cosmological parameter estimation. To place these different samples on a single system, analyses currently use observations of a small sample of very bright flux standards on the $HST$ system. We propose a complementary method, called `Supercal', in which we use measurements of ","authors_text":"A. G. Riess, A. Rest, C. Tang, C. W. Stubbs, D. Finkbeiner, D. Scolnic, E. A. Magnier, E. Schlafly, H. Flewelling, K. C. Chambers, K. W. Hodapp, M. E. Huber, N. Kaiser, N. Metcalfe, P. W. Draper, R. J. Foley, R. P. Kudritzki, S. Casertano, W. S. Burgett","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-17T20:05:53Z","title":"Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05361","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":"sha256:9e5059a3af7e5b7c2ed3cb6edda1b3d94ff3939fd9370212fa234dc10cc0bc97","target":"record","created_at":"2026-05-18T01:23:55Z","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":"22ee704eaad0eba9d56e0726fecf78b2ebd503d28e697fd13152c5ed92025d2d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-17T20:05:53Z","title_canon_sha256":"cca30323b37a5dd0d3e5b0610e62aa834bc66505d5674318a5822da170de7236"},"schema_version":"1.0","source":{"id":"1508.05361","kind":"arxiv","version":2}},"canonical_sha256":"9c30fe5996a9ca0ad87557a654cb406c3924aba305907cff74ba2b53e5ff444b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c30fe5996a9ca0ad87557a654cb406c3924aba305907cff74ba2b53e5ff444b","first_computed_at":"2026-05-18T01:23:55.690000Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:55.690000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R0PA7xZbT0lA8SYTBiUJN6iejz5w9n9gR7K1LHM2VSHnGl9bRX1sPQJpk/bT95Ih1H8sxCRx8xDqOmO3QJ7iCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:55.690521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.05361","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e5059a3af7e5b7c2ed3cb6edda1b3d94ff3939fd9370212fa234dc10cc0bc97","sha256:9df606a75bc0b26480c00a238c706790637be43708f0ff758c5f955c6f4a5a83"],"state_sha256":"7bde4aa6cf1cae9c885222004d881c98aae9e4e896de915faa4775a430122d3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iRQjnY+xnHayp/05XOocInwbJwfZQCsWJQ1bE+bDzpqrwjxz6cfvVbLf6Swpnzbx9hYbNe1g/VvaHLZ/C/VzAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T14:24:55.640124Z","bundle_sha256":"a538279675a0994de1e639197d6d1fb819f20f8765c36680a21a4c9b89d1ab1b"}}