{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:TGX7TTGS7PQAGMJ5MTOWKVM36N","short_pith_number":"pith:TGX7TTGS","canonical_record":{"source":{"id":"0909.2692","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T23:20:35Z","cross_cats_sorted":[],"title_canon_sha256":"1658fed412349d089cb04d029696458d8175bb28b4e9a1983d10fe9543fd7b0b","abstract_canon_sha256":"484736d7f6a5363a1faa5728899ffec6e19e5d4de9c2bd03cc620f5fbcecca84"},"schema_version":"1.0"},"canonical_sha256":"99aff9ccd2fbe003313d64dd65559bf346e21e8f44c3af7f93a0d7278f8f9bbd","source":{"kind":"arxiv","id":"0909.2692","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2692","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2692v3","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2692","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"pith_short_12","alias_value":"TGX7TTGS7PQA","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TGX7TTGS7PQAGMJ5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TGX7TTGS","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:TGX7TTGS7PQAGMJ5MTOWKVM36N","target":"record","payload":{"canonical_record":{"source":{"id":"0909.2692","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T23:20:35Z","cross_cats_sorted":[],"title_canon_sha256":"1658fed412349d089cb04d029696458d8175bb28b4e9a1983d10fe9543fd7b0b","abstract_canon_sha256":"484736d7f6a5363a1faa5728899ffec6e19e5d4de9c2bd03cc620f5fbcecca84"},"schema_version":"1.0"},"canonical_sha256":"99aff9ccd2fbe003313d64dd65559bf346e21e8f44c3af7f93a0d7278f8f9bbd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:30.039486Z","signature_b64":"HQpcGllEpnsZwapMnPypr2OpdmyI23SlfARMtm9wJr/UFMVixKTajs/7ohOCMW0h967zCHVvNS6sxFQSqRSoAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99aff9ccd2fbe003313d64dd65559bf346e21e8f44c3af7f93a0d7278f8f9bbd","last_reissued_at":"2026-05-18T02:34:30.039111Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:30.039111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.2692","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:34:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ky09qBaL3wDiRkRuRMcSCasx+Qttph/qAfO+/4DF+RW6//UIXWCLib6DDf++H7BnedtMI4sfwYIhR11qDoGoCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T03:54:14.887233Z"},"content_sha256":"7221a1363ebbbef0d56c50fa7241548e95bdfbf31b18b1af2196d39568a7a7a5","schema_version":"1.0","event_id":"sha256:7221a1363ebbbef0d56c50fa7241548e95bdfbf31b18b1af2196d39568a7a7a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:TGX7TTGS7PQAGMJ5MTOWKVM36N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmology with Photometric Surveys of Type Ia Supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Asantha Cooray, Xuelei Chen, Yan Gong","submitted_at":"2009-09-14T23:20:35Z","abstract_excerpt":"We discuss the extent to which photometric measurements alone can be used to identify Type Ia supernovae (SNIa) and to determine redshift and other parameters of interest for cosmological studies. We fit the light curve data of the type expected from a survey such as the one planned with Large Synoptic Survey Telescope (LSST) and also to remove the contamination from the core-collapse supernovae to SNIa samples. We generate 1000 SNIa mock flux data for each of the LSST filters based on existing design parameters, then use a Markov Chain Monte-Carlo (MCMC) analysis to fit for the redshift, appa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2692","kind":"arxiv","version":3},"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":"2026-05-18T02:34:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rALpdygHS7vlucdDmdycVAKogVpJptUT4B3VoNb9xTMB6ChJRcgUCxihuIzhRg89xq997vXMzkWAygGjzx9sBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T03:54:14.887594Z"},"content_sha256":"5458b309b83e98eb2e12e3702e8196489bea281340123bad1fd4cd17bddd26cf","schema_version":"1.0","event_id":"sha256:5458b309b83e98eb2e12e3702e8196489bea281340123bad1fd4cd17bddd26cf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/bundle.json","state_url":"https://pith.science/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/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":"2026-06-02T03:54:14Z","links":{"resolver":"https://pith.science/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N","bundle":"https://pith.science/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/bundle.json","state":"https://pith.science/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TGX7TTGS7PQAGMJ5MTOWKVM36N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:TGX7TTGS7PQAGMJ5MTOWKVM36N","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":"484736d7f6a5363a1faa5728899ffec6e19e5d4de9c2bd03cc620f5fbcecca84","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T23:20:35Z","title_canon_sha256":"1658fed412349d089cb04d029696458d8175bb28b4e9a1983d10fe9543fd7b0b"},"schema_version":"1.0","source":{"id":"0909.2692","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2692","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2692v3","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2692","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"pith_short_12","alias_value":"TGX7TTGS7PQA","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TGX7TTGS7PQAGMJ5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TGX7TTGS","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:5458b309b83e98eb2e12e3702e8196489bea281340123bad1fd4cd17bddd26cf","target":"graph","created_at":"2026-05-18T02:34:30Z","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":"We discuss the extent to which photometric measurements alone can be used to identify Type Ia supernovae (SNIa) and to determine redshift and other parameters of interest for cosmological studies. We fit the light curve data of the type expected from a survey such as the one planned with Large Synoptic Survey Telescope (LSST) and also to remove the contamination from the core-collapse supernovae to SNIa samples. We generate 1000 SNIa mock flux data for each of the LSST filters based on existing design parameters, then use a Markov Chain Monte-Carlo (MCMC) analysis to fit for the redshift, appa","authors_text":"Asantha Cooray, Xuelei Chen, Yan Gong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T23:20:35Z","title":"Cosmology with Photometric Surveys of Type Ia Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2692","kind":"arxiv","version":3},"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":"sha256:7221a1363ebbbef0d56c50fa7241548e95bdfbf31b18b1af2196d39568a7a7a5","target":"record","created_at":"2026-05-18T02:34:30Z","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":"484736d7f6a5363a1faa5728899ffec6e19e5d4de9c2bd03cc620f5fbcecca84","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-14T23:20:35Z","title_canon_sha256":"1658fed412349d089cb04d029696458d8175bb28b4e9a1983d10fe9543fd7b0b"},"schema_version":"1.0","source":{"id":"0909.2692","kind":"arxiv","version":3}},"canonical_sha256":"99aff9ccd2fbe003313d64dd65559bf346e21e8f44c3af7f93a0d7278f8f9bbd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99aff9ccd2fbe003313d64dd65559bf346e21e8f44c3af7f93a0d7278f8f9bbd","first_computed_at":"2026-05-18T02:34:30.039111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:30.039111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HQpcGllEpnsZwapMnPypr2OpdmyI23SlfARMtm9wJr/UFMVixKTajs/7ohOCMW0h967zCHVvNS6sxFQSqRSoAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:30.039486Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2692","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7221a1363ebbbef0d56c50fa7241548e95bdfbf31b18b1af2196d39568a7a7a5","sha256:5458b309b83e98eb2e12e3702e8196489bea281340123bad1fd4cd17bddd26cf"],"state_sha256":"3fa029526e077f32f54ad37b903930958080c6b6c827f80200416a20c6e06931"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OgHMNXzQuldECfnOivjFOgQH8V/Xj/Acf58sqZFjA90AsROX+vyYZVr9Q6StLU9J5iNj/YICzoYQLcIsrKILCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T03:54:14.889517Z","bundle_sha256":"25ffcdefad0fb7482990661ffe599308a99bb616355849ceb2d5d8ec7f67f86e"}}