{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:M5KN2PFS2NBJU2AVLWF6VCSIWA","short_pith_number":"pith:M5KN2PFS","canonical_record":{"source":{"id":"1505.00777","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-04T20:00:22Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"ed1717ab82368fcca18a14cf2aa4d067ddf19a04d5ed2a8e06cfd554d50433bb","abstract_canon_sha256":"a9cfc008ccd96b48015fdad69b991ae0cae69ac573520df86002e8ec3198dc57"},"schema_version":"1.0"},"canonical_sha256":"6754dd3cb2d3429a68155d8bea8a48b01528e8c2edbd82f759778d2b1ca89546","source":{"kind":"arxiv","id":"1505.00777","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.00777","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"arxiv_version","alias_value":"1505.00777v3","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.00777","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"pith_short_12","alias_value":"M5KN2PFS2NBJ","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"M5KN2PFS2NBJU2AV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"M5KN2PFS","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:M5KN2PFS2NBJU2AVLWF6VCSIWA","target":"record","payload":{"canonical_record":{"source":{"id":"1505.00777","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-04T20:00:22Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"ed1717ab82368fcca18a14cf2aa4d067ddf19a04d5ed2a8e06cfd554d50433bb","abstract_canon_sha256":"a9cfc008ccd96b48015fdad69b991ae0cae69ac573520df86002e8ec3198dc57"},"schema_version":"1.0"},"canonical_sha256":"6754dd3cb2d3429a68155d8bea8a48b01528e8c2edbd82f759778d2b1ca89546","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:01.740058Z","signature_b64":"lL7+WqZCtGhlr0HkIMVSTcMYyoZiUM0bmDJMpcwhe6Rr7FQ+tOxh0eqMCXHy4tKiR2eJBwYRml5ZbyPcE4YfCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6754dd3cb2d3429a68155d8bea8a48b01528e8c2edbd82f759778d2b1ca89546","last_reissued_at":"2026-05-18T01:20:01.739271Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:01.739271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.00777","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":"2026-05-18T01:20:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"btPcy4oT2yI7SlhEatA6ADn4ZTcHpJvM1DBvGjmzzmpxxvZBbLCXjj+UagnhoJkYlCVOf8SGmwudCMtNSZikDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:44:13.679292Z"},"content_sha256":"7c97d71b7059996508166c713067e0cf229cd733ae24f758d5e5c5553316c952","schema_version":"1.0","event_id":"sha256:7c97d71b7059996508166c713067e0cf229cd733ae24f758d5e5c5553316c952"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:M5KN2PFS2NBJU2AVLWF6VCSIWA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Late-Time Photometry of Type Ia Supernova SN 2012cg Reveals the Radioactive Decay of $^{57}$Co","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"Adam G. Riess, Armin Rest, David Zurek, Ivo R. Seitenzahl, Michael M. Shara, Or Graur","submitted_at":"2015-05-04T20:00:22Z","abstract_excerpt":"Seitenzahl et al. (2009) have predicted that roughly three years after its explosion, the light we receive from a Type Ia supernova (SN Ia) will come mostly from reprocessing of electrons and X-rays emitted by the radioactive decay chain $^{57}{\\rm Co}~\\to~^{57}{\\rm Fe}$, instead of positrons from the decay chain $^{56}{\\rm Co}~\\to~^{56}{\\rm Fe}$ that dominates the SN light at earlier times. Using the {\\it Hubble Space Telescope}, we followed the light curve of the SN Ia SN 2012cg out to $1055$ days after maximum light. Our measurements are consistent with the light curves predicted by the con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.00777","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":"2026-05-18T01:20:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J9jshYyPErSoQUxIfbWd+LKzjLSM56Tc2LSW5cXGTeii8if2w3LA8z9kd62Ga6p8eSfhTRiiqKoaeHgejC2eDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:44:13.679930Z"},"content_sha256":"75cc3f84b91b6e8f7a04f5a1cf3fedc12b63315ea8a91ccece807c3087317546","schema_version":"1.0","event_id":"sha256:75cc3f84b91b6e8f7a04f5a1cf3fedc12b63315ea8a91ccece807c3087317546"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/bundle.json","state_url":"https://pith.science/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/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":"2026-06-05T15:44:13Z","links":{"resolver":"https://pith.science/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA","bundle":"https://pith.science/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/bundle.json","state":"https://pith.science/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M5KN2PFS2NBJU2AVLWF6VCSIWA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:M5KN2PFS2NBJU2AVLWF6VCSIWA","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":"a9cfc008ccd96b48015fdad69b991ae0cae69ac573520df86002e8ec3198dc57","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-04T20:00:22Z","title_canon_sha256":"ed1717ab82368fcca18a14cf2aa4d067ddf19a04d5ed2a8e06cfd554d50433bb"},"schema_version":"1.0","source":{"id":"1505.00777","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.00777","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"arxiv_version","alias_value":"1505.00777v3","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.00777","created_at":"2026-05-18T01:20:01Z"},{"alias_kind":"pith_short_12","alias_value":"M5KN2PFS2NBJ","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"M5KN2PFS2NBJU2AV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"M5KN2PFS","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:75cc3f84b91b6e8f7a04f5a1cf3fedc12b63315ea8a91ccece807c3087317546","target":"graph","created_at":"2026-05-18T01:20:01Z","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":"Seitenzahl et al. (2009) have predicted that roughly three years after its explosion, the light we receive from a Type Ia supernova (SN Ia) will come mostly from reprocessing of electrons and X-rays emitted by the radioactive decay chain $^{57}{\\rm Co}~\\to~^{57}{\\rm Fe}$, instead of positrons from the decay chain $^{56}{\\rm Co}~\\to~^{56}{\\rm Fe}$ that dominates the SN light at earlier times. Using the {\\it Hubble Space Telescope}, we followed the light curve of the SN Ia SN 2012cg out to $1055$ days after maximum light. Our measurements are consistent with the light curves predicted by the con","authors_text":"Adam G. Riess, Armin Rest, David Zurek, Ivo R. Seitenzahl, Michael M. Shara, Or Graur","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-04T20:00:22Z","title":"Late-Time Photometry of Type Ia Supernova SN 2012cg Reveals the Radioactive Decay of $^{57}$Co"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.00777","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":"sha256:7c97d71b7059996508166c713067e0cf229cd733ae24f758d5e5c5553316c952","target":"record","created_at":"2026-05-18T01:20:01Z","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":"a9cfc008ccd96b48015fdad69b991ae0cae69ac573520df86002e8ec3198dc57","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-05-04T20:00:22Z","title_canon_sha256":"ed1717ab82368fcca18a14cf2aa4d067ddf19a04d5ed2a8e06cfd554d50433bb"},"schema_version":"1.0","source":{"id":"1505.00777","kind":"arxiv","version":3}},"canonical_sha256":"6754dd3cb2d3429a68155d8bea8a48b01528e8c2edbd82f759778d2b1ca89546","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6754dd3cb2d3429a68155d8bea8a48b01528e8c2edbd82f759778d2b1ca89546","first_computed_at":"2026-05-18T01:20:01.739271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:01.739271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lL7+WqZCtGhlr0HkIMVSTcMYyoZiUM0bmDJMpcwhe6Rr7FQ+tOxh0eqMCXHy4tKiR2eJBwYRml5ZbyPcE4YfCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:01.740058Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.00777","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c97d71b7059996508166c713067e0cf229cd733ae24f758d5e5c5553316c952","sha256:75cc3f84b91b6e8f7a04f5a1cf3fedc12b63315ea8a91ccece807c3087317546"],"state_sha256":"699e28a39d9dba24d22bc77e159ddbf1886926fb33fea49c17398b05f387a021"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"buVBeJYmaXz2RYv5PHxFQs2KgCugL5UkfuGK7BaUY6aYhzSxNs3jyzVTx8OS/iAe6+VkuO3BZ6WM6UVwLAPCDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:44:13.683174Z","bundle_sha256":"d54b35bdacfef71243991461712bd9228f92efc64783a2f05d9f67d74b60c9a3"}}