{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PXUF5SS46ACAL4HDK3SSA5TIJK","short_pith_number":"pith:PXUF5SS4","canonical_record":{"source":{"id":"2101.11618","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-27T19:00:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"15a85351bf97c5579344d475c41392ab60258f854b26a1e31830f4d98be46a21","abstract_canon_sha256":"0583c702cf253ebab3941f52ceb8fe79bc394879ef26a634a862d921dac2635b"},"schema_version":"1.0"},"canonical_sha256":"7de85eca5cf00405f0e356e52076684a855da60808b14348a224621e65cb5550","source":{"kind":"arxiv","id":"2101.11618","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.11618","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"arxiv_version","alias_value":"2101.11618v1","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.11618","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_12","alias_value":"PXUF5SS46ACA","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_16","alias_value":"PXUF5SS46ACAL4HD","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_8","alias_value":"PXUF5SS4","created_at":"2026-07-05T02:43:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PXUF5SS46ACAL4HDK3SSA5TIJK","target":"record","payload":{"canonical_record":{"source":{"id":"2101.11618","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-27T19:00:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"15a85351bf97c5579344d475c41392ab60258f854b26a1e31830f4d98be46a21","abstract_canon_sha256":"0583c702cf253ebab3941f52ceb8fe79bc394879ef26a634a862d921dac2635b"},"schema_version":"1.0"},"canonical_sha256":"7de85eca5cf00405f0e356e52076684a855da60808b14348a224621e65cb5550","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:43:16.132407Z","signature_b64":"fLUfLNCZxYD1Ai8xPh4E8qrNxmcs30YVBmFpuvYppFma5e6xmKsAocRwwQKYbO+XeUOqFrqITG9mVlmXDxhwDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7de85eca5cf00405f0e356e52076684a855da60808b14348a224621e65cb5550","last_reissued_at":"2026-07-05T02:43:16.132005Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:43:16.132005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.11618","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":"2026-07-05T02:43:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VvcLllWT+rIfoOTHiHsZOoN/cuS49HEcqbLnAhD2YKcNvhzJhA5XkPsxGLBD2rdt3RbSdJ6/p8FK7c/bgeU1DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:16:24.658620Z"},"content_sha256":"f93f3cc7b47741d6da129bd68e750d425aebc24b72594353c2f3b94c7d9328f2","schema_version":"1.0","event_id":"sha256:f93f3cc7b47741d6da129bd68e750d425aebc24b72594353c2f3b94c7d9328f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PXUF5SS46ACAL4HDK3SSA5TIJK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The RR Lyrae Delay-Time Distribution: A Novel Perspective on Models of Old Stellar Populations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Carles Badenes, Cecilia Mateu, Dan Maoz, Jeffrey Newman, Laura Chomiuk, Mairead Heiger, Na'ama Hallakoun, Robin Ciardullo, Sumit K. Sarbadhicary","submitted_at":"2021-01-27T19:00:00Z","abstract_excerpt":"The delay-time distribution (DTD) is the occurrence rate of a class of objects as a function of time after a hypothetical burst of star formation. DTDs are mainly used as a statistical test of stellar evolution scenarios for supernova progenitors, but they can be applied to many other classes of astronomical objects. We calculate the first DTD for RR Lyrae variables using 29,810 RR Lyrae from the OGLE-IV survey and a map of the stellar-age distribution (SAD) in the Large Magellanic Cloud (LMC). We find that $\\sim 46\\%$ of the OGLE-IV RR Lyrae are associated with delay-times older than 8 Gyr (m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.11618","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.11618/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:43:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lKeJDNihVnMB8W6ALGeveWRBLzAhWKdPn9wQS7bZozZZhyDOM2ppXbnbzEYEwDRXXOVygFfdEAsL2ID4DfLUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:16:24.659129Z"},"content_sha256":"5c27d7961e76991b98ed09383ddfc36c3ece03f3570268fd241da80598099491","schema_version":"1.0","event_id":"sha256:5c27d7961e76991b98ed09383ddfc36c3ece03f3570268fd241da80598099491"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/bundle.json","state_url":"https://pith.science/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/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":"2026-08-05T09:16:24Z","links":{"resolver":"https://pith.science/pith/PXUF5SS46ACAL4HDK3SSA5TIJK","bundle":"https://pith.science/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/bundle.json","state":"https://pith.science/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PXUF5SS46ACAL4HDK3SSA5TIJK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PXUF5SS46ACAL4HDK3SSA5TIJK","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":"0583c702cf253ebab3941f52ceb8fe79bc394879ef26a634a862d921dac2635b","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-27T19:00:00Z","title_canon_sha256":"15a85351bf97c5579344d475c41392ab60258f854b26a1e31830f4d98be46a21"},"schema_version":"1.0","source":{"id":"2101.11618","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.11618","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"arxiv_version","alias_value":"2101.11618v1","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.11618","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_12","alias_value":"PXUF5SS46ACA","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_16","alias_value":"PXUF5SS46ACAL4HD","created_at":"2026-07-05T02:43:16Z"},{"alias_kind":"pith_short_8","alias_value":"PXUF5SS4","created_at":"2026-07-05T02:43:16Z"}],"graph_snapshots":[{"event_id":"sha256:5c27d7961e76991b98ed09383ddfc36c3ece03f3570268fd241da80598099491","target":"graph","created_at":"2026-07-05T02:43:16Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2101.11618/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The delay-time distribution (DTD) is the occurrence rate of a class of objects as a function of time after a hypothetical burst of star formation. DTDs are mainly used as a statistical test of stellar evolution scenarios for supernova progenitors, but they can be applied to many other classes of astronomical objects. We calculate the first DTD for RR Lyrae variables using 29,810 RR Lyrae from the OGLE-IV survey and a map of the stellar-age distribution (SAD) in the Large Magellanic Cloud (LMC). We find that $\\sim 46\\%$ of the OGLE-IV RR Lyrae are associated with delay-times older than 8 Gyr (m","authors_text":"Carles Badenes, Cecilia Mateu, Dan Maoz, Jeffrey Newman, Laura Chomiuk, Mairead Heiger, Na'ama Hallakoun, Robin Ciardullo, Sumit K. Sarbadhicary","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-27T19:00:00Z","title":"The RR Lyrae Delay-Time Distribution: A Novel Perspective on Models of Old Stellar Populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.11618","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:f93f3cc7b47741d6da129bd68e750d425aebc24b72594353c2f3b94c7d9328f2","target":"record","created_at":"2026-07-05T02:43:16Z","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":"0583c702cf253ebab3941f52ceb8fe79bc394879ef26a634a862d921dac2635b","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-27T19:00:00Z","title_canon_sha256":"15a85351bf97c5579344d475c41392ab60258f854b26a1e31830f4d98be46a21"},"schema_version":"1.0","source":{"id":"2101.11618","kind":"arxiv","version":1}},"canonical_sha256":"7de85eca5cf00405f0e356e52076684a855da60808b14348a224621e65cb5550","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7de85eca5cf00405f0e356e52076684a855da60808b14348a224621e65cb5550","first_computed_at":"2026-07-05T02:43:16.132005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:43:16.132005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fLUfLNCZxYD1Ai8xPh4E8qrNxmcs30YVBmFpuvYppFma5e6xmKsAocRwwQKYbO+XeUOqFrqITG9mVlmXDxhwDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:43:16.132407Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.11618","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f93f3cc7b47741d6da129bd68e750d425aebc24b72594353c2f3b94c7d9328f2","sha256:5c27d7961e76991b98ed09383ddfc36c3ece03f3570268fd241da80598099491"],"state_sha256":"8a16658b07e30719198323767303175e0034cc2da630af9f46fa6ebf8468ea62"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BlXCdU8s9XM3XKc7TY+PwLYilUSV1RjcTog8FHbnh+Ut7kSut3V7rCQTfRg7drF6DRKqvTvLQcIv+BP4tFQkBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T09:16:24.662682Z","bundle_sha256":"562bcb713eb52e9fae08375264d1af758d6edd2b75cac20fdef15656795c0fb7"}}