{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:VE4NBM2IJQYSTQTBSQ3CHZL5LG","short_pith_number":"pith:VE4NBM2I","canonical_record":{"source":{"id":"0910.0075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-10-01T19:27:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"f1e33e3152d41863a645355319227f056fffe08b00c40346490b40b744474d10","abstract_canon_sha256":"fe65b3114e55679cb6dca41dc7c98dc7f0348f11eb0534167a980bfd753fe2b4"},"schema_version":"1.0"},"canonical_sha256":"a938d0b3484c3129c261943623e57d59ae0d82a487893a7899b2104b3e52f0bc","source":{"kind":"arxiv","id":"0910.0075","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0075","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0075v1","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0075","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"pith_short_12","alias_value":"VE4NBM2IJQYS","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VE4NBM2IJQYSTQTB","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VE4NBM2I","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:VE4NBM2IJQYSTQTBSQ3CHZL5LG","target":"record","payload":{"canonical_record":{"source":{"id":"0910.0075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-10-01T19:27:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"f1e33e3152d41863a645355319227f056fffe08b00c40346490b40b744474d10","abstract_canon_sha256":"fe65b3114e55679cb6dca41dc7c98dc7f0348f11eb0534167a980bfd753fe2b4"},"schema_version":"1.0"},"canonical_sha256":"a938d0b3484c3129c261943623e57d59ae0d82a487893a7899b2104b3e52f0bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:20.575333Z","signature_b64":"2UjKSy6XyDGwv07Tobo2RcGw9RNfinH+FCyrUrfzLrRkFLQ4159vOj1VVupzXobEwkyU5tkJFOm8lXepa4k4Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a938d0b3484c3129c261943623e57d59ae0d82a487893a7899b2104b3e52f0bc","last_reissued_at":"2026-05-18T02:34:20.574828Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:20.574828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.0075","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":"2026-05-18T02:34:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZoYOcJl+bCTrgmQboiMtIJIKf681gvmqyg18p94FhS1N6KSjr0ToeJg6Zck/bEAWQrkNa+VTU5vKHzx8R2XaBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:48:11.632352Z"},"content_sha256":"daa4a18bd0bdd6551fa847c8d6a624722a2c7ca8de250435e74659df7cceed1a","schema_version":"1.0","event_id":"sha256:daa4a18bd0bdd6551fa847c8d6a624722a2c7ca8de250435e74659df7cceed1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:VE4NBM2IJQYSTQTBSQ3CHZL5LG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical Cross Correlation Filters: An Economical Approach for Identifying SNe Ia and Estimating their Redshifts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"A. G. Riess, A. Rest, C. Stubbs, D. M. Scolnic, J. L. Tonry, M. E. Huber","submitted_at":"2009-10-01T19:27:24Z","abstract_excerpt":"Large photometric surveys of transient phenomena, such as Pan-STARRS and LSST, will locate thousands to millions of type Ia supernova candidates per year, a rate prohibitive for acquiring spectroscopy to determine each candidate's type and redshift. In response, we have developed an economical approach to identifying SNe Ia and their redshifts using an uncommon type of optical filter which has multiple, discontinuous passbands on a single substrate. Observation of a supernova through a specially designed pair of these `cross-correlation filters' measures the approximate amplitude and phase of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0075","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":"2026-05-18T02:34:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/SI5EPUOWN8eaiIamjz3pAZH/CkfCLLEvS14GVKxBK6lA8ofxfI+EW0BeiCvI4zjwWeYRe1G67bW+AS/LAVTAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:48:11.632696Z"},"content_sha256":"309a78ffac3fe8a76aba3b199a85e91cde9ae8a0017db4aa9edde4b582182744","schema_version":"1.0","event_id":"sha256:309a78ffac3fe8a76aba3b199a85e91cde9ae8a0017db4aa9edde4b582182744"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/bundle.json","state_url":"https://pith.science/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/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":"2026-06-01T10:48:11Z","links":{"resolver":"https://pith.science/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG","bundle":"https://pith.science/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/bundle.json","state":"https://pith.science/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VE4NBM2IJQYSTQTBSQ3CHZL5LG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:VE4NBM2IJQYSTQTBSQ3CHZL5LG","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":"fe65b3114e55679cb6dca41dc7c98dc7f0348f11eb0534167a980bfd753fe2b4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-10-01T19:27:24Z","title_canon_sha256":"f1e33e3152d41863a645355319227f056fffe08b00c40346490b40b744474d10"},"schema_version":"1.0","source":{"id":"0910.0075","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0075","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0075v1","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0075","created_at":"2026-05-18T02:34:20Z"},{"alias_kind":"pith_short_12","alias_value":"VE4NBM2IJQYS","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"VE4NBM2IJQYSTQTB","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"VE4NBM2I","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:309a78ffac3fe8a76aba3b199a85e91cde9ae8a0017db4aa9edde4b582182744","target":"graph","created_at":"2026-05-18T02:34:20Z","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":"Large photometric surveys of transient phenomena, such as Pan-STARRS and LSST, will locate thousands to millions of type Ia supernova candidates per year, a rate prohibitive for acquiring spectroscopy to determine each candidate's type and redshift. In response, we have developed an economical approach to identifying SNe Ia and their redshifts using an uncommon type of optical filter which has multiple, discontinuous passbands on a single substrate. Observation of a supernova through a specially designed pair of these `cross-correlation filters' measures the approximate amplitude and phase of ","authors_text":"A. G. Riess, A. Rest, C. Stubbs, D. M. Scolnic, J. L. Tonry, M. E. Huber","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-10-01T19:27:24Z","title":"Optical Cross Correlation Filters: An Economical Approach for Identifying SNe Ia and Estimating their Redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0075","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:daa4a18bd0bdd6551fa847c8d6a624722a2c7ca8de250435e74659df7cceed1a","target":"record","created_at":"2026-05-18T02:34:20Z","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":"fe65b3114e55679cb6dca41dc7c98dc7f0348f11eb0534167a980bfd753fe2b4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-10-01T19:27:24Z","title_canon_sha256":"f1e33e3152d41863a645355319227f056fffe08b00c40346490b40b744474d10"},"schema_version":"1.0","source":{"id":"0910.0075","kind":"arxiv","version":1}},"canonical_sha256":"a938d0b3484c3129c261943623e57d59ae0d82a487893a7899b2104b3e52f0bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a938d0b3484c3129c261943623e57d59ae0d82a487893a7899b2104b3e52f0bc","first_computed_at":"2026-05-18T02:34:20.574828Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:20.574828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2UjKSy6XyDGwv07Tobo2RcGw9RNfinH+FCyrUrfzLrRkFLQ4159vOj1VVupzXobEwkyU5tkJFOm8lXepa4k4Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:20.575333Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.0075","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daa4a18bd0bdd6551fa847c8d6a624722a2c7ca8de250435e74659df7cceed1a","sha256:309a78ffac3fe8a76aba3b199a85e91cde9ae8a0017db4aa9edde4b582182744"],"state_sha256":"e2d693eb4bad133bcc910a733d9eef51fef5480cdee20abd0f90accd68b000cc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1YkOMNNuGWz3E9Sc4xCnnnj20Wy4+ApEM5s8iSdZkHt3cge8m3JUdlGFopYpIQYt3fqcRJAV2NgkWjAjN3qADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T10:48:11.634671Z","bundle_sha256":"b15ca3d09cf48bcd20a6d4275ea547a0022328f280dafda948d0f678ea0d8cb7"}}