{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:UYMDXWDECYTCBSOX7Q4EBGFJBG","short_pith_number":"pith:UYMDXWDE","canonical_record":{"source":{"id":"2012.00793","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-12-01T19:40:36Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"324aa039c93ad7a1bbedd783512fc3f833b0a628b6e47cac437e7c701f5f9554","abstract_canon_sha256":"a29063ba513e916e9d0a161db69fb250e30625db035eaa91e3c1f91f784ababf"},"schema_version":"1.0"},"canonical_sha256":"a6183bd864162620c9d7fc384098a9098b5977e6476cee7064178c0af21c966b","source":{"kind":"arxiv","id":"2012.00793","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.00793","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"arxiv_version","alias_value":"2012.00793v2","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.00793","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_12","alias_value":"UYMDXWDECYTC","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_16","alias_value":"UYMDXWDECYTCBSOX","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_8","alias_value":"UYMDXWDE","created_at":"2026-07-05T02:19:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:UYMDXWDECYTCBSOX7Q4EBGFJBG","target":"record","payload":{"canonical_record":{"source":{"id":"2012.00793","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-12-01T19:40:36Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"324aa039c93ad7a1bbedd783512fc3f833b0a628b6e47cac437e7c701f5f9554","abstract_canon_sha256":"a29063ba513e916e9d0a161db69fb250e30625db035eaa91e3c1f91f784ababf"},"schema_version":"1.0"},"canonical_sha256":"a6183bd864162620c9d7fc384098a9098b5977e6476cee7064178c0af21c966b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:19:39.477759Z","signature_b64":"nQIbl1+Tt7ksGJXW8koqQ5r2fJiAuJiIoHv+cJKn+nGEiNZ5889Sf3Ya3XfvnwdsATM5wlbjk8SPHqvqAfMQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6183bd864162620c9d7fc384098a9098b5977e6476cee7064178c0af21c966b","last_reissued_at":"2026-07-05T02:19:39.477346Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:19:39.477346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.00793","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":"2026-07-05T02:19:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jZU94YNIQQ9Eaq0O6nVritqUwzqj7kHsdhSvuZnWHcxyH6dW8R037ziUcPJi2ooyF76QInN6+paPkfV9TBx4BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:58:39.414849Z"},"content_sha256":"ed5f4d987a3ccf41acca6c6fc1d4e22ddbd17cbbac8ad95730369b0e4e57455f","schema_version":"1.0","event_id":"sha256:ed5f4d987a3ccf41acca6c6fc1d4e22ddbd17cbbac8ad95730369b0e4e57455f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:UYMDXWDECYTCBSOX7Q4EBGFJBG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The delay time distribution of Type-Ia supernovae in galaxy clusters: the impact of extended star-formation histories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Dan Maoz, Jonathan Freundlich","submitted_at":"2020-12-01T19:40:36Z","abstract_excerpt":"The delay time distribution (DTD) of Type-Ia supernovae (SNe Ia) is important for understanding chemical evolution, SN Ia progenitors, and SN Ia physics. Past estimates of the DTD in galaxy clusters have been deduced from SN Ia rates measured in cluster samples observed at various redshifts, corresponding to different time intervals after a presumed initial brief burst of star formation. A recent analysis of a cluster sample at $z=1.13-1.75$ confirmed indications from previous studies of lower-redshift clusters, that the DTD has a power-law form, ${\\rm DTD}(t)=R_1 (t/{\\rm Gyr})^\\alpha$, with a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.00793","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2012.00793/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":"2026-07-05T02:19:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZNjCr9dcxfYsM9qzWwC4YEm3BQUwxO7LC+X5vAl25GZ38ZuOBx5y8MbUPHoMTASGwYGM1amf/uCVM8E6+V6jCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:58:39.415234Z"},"content_sha256":"739482ebc7b8cb076dcd48390aef8cdad0b5f35a0b8ef16d69cf4dd909ec42c7","schema_version":"1.0","event_id":"sha256:739482ebc7b8cb076dcd48390aef8cdad0b5f35a0b8ef16d69cf4dd909ec42c7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/bundle.json","state_url":"https://pith.science/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/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":"2026-07-07T11:58:39Z","links":{"resolver":"https://pith.science/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG","bundle":"https://pith.science/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/bundle.json","state":"https://pith.science/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYMDXWDECYTCBSOX7Q4EBGFJBG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:UYMDXWDECYTCBSOX7Q4EBGFJBG","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":"a29063ba513e916e9d0a161db69fb250e30625db035eaa91e3c1f91f784ababf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-12-01T19:40:36Z","title_canon_sha256":"324aa039c93ad7a1bbedd783512fc3f833b0a628b6e47cac437e7c701f5f9554"},"schema_version":"1.0","source":{"id":"2012.00793","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.00793","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"arxiv_version","alias_value":"2012.00793v2","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.00793","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_12","alias_value":"UYMDXWDECYTC","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_16","alias_value":"UYMDXWDECYTCBSOX","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_8","alias_value":"UYMDXWDE","created_at":"2026-07-05T02:19:39Z"}],"graph_snapshots":[{"event_id":"sha256:739482ebc7b8cb076dcd48390aef8cdad0b5f35a0b8ef16d69cf4dd909ec42c7","target":"graph","created_at":"2026-07-05T02:19:39Z","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/2012.00793/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The delay time distribution (DTD) of Type-Ia supernovae (SNe Ia) is important for understanding chemical evolution, SN Ia progenitors, and SN Ia physics. Past estimates of the DTD in galaxy clusters have been deduced from SN Ia rates measured in cluster samples observed at various redshifts, corresponding to different time intervals after a presumed initial brief burst of star formation. A recent analysis of a cluster sample at $z=1.13-1.75$ confirmed indications from previous studies of lower-redshift clusters, that the DTD has a power-law form, ${\\rm DTD}(t)=R_1 (t/{\\rm Gyr})^\\alpha$, with a","authors_text":"Dan Maoz, Jonathan Freundlich","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-12-01T19:40:36Z","title":"The delay time distribution of Type-Ia supernovae in galaxy clusters: the impact of extended star-formation histories"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.00793","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:ed5f4d987a3ccf41acca6c6fc1d4e22ddbd17cbbac8ad95730369b0e4e57455f","target":"record","created_at":"2026-07-05T02:19:39Z","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":"a29063ba513e916e9d0a161db69fb250e30625db035eaa91e3c1f91f784ababf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-12-01T19:40:36Z","title_canon_sha256":"324aa039c93ad7a1bbedd783512fc3f833b0a628b6e47cac437e7c701f5f9554"},"schema_version":"1.0","source":{"id":"2012.00793","kind":"arxiv","version":2}},"canonical_sha256":"a6183bd864162620c9d7fc384098a9098b5977e6476cee7064178c0af21c966b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6183bd864162620c9d7fc384098a9098b5977e6476cee7064178c0af21c966b","first_computed_at":"2026-07-05T02:19:39.477346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:19:39.477346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nQIbl1+Tt7ksGJXW8koqQ5r2fJiAuJiIoHv+cJKn+nGEiNZ5889Sf3Ya3XfvnwdsATM5wlbjk8SPHqvqAfMQBg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:19:39.477759Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.00793","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed5f4d987a3ccf41acca6c6fc1d4e22ddbd17cbbac8ad95730369b0e4e57455f","sha256:739482ebc7b8cb076dcd48390aef8cdad0b5f35a0b8ef16d69cf4dd909ec42c7"],"state_sha256":"2ffea83646cbfa22c8601e76b0e2271b03af7a9cc1e03ac4f61c861c3df8c2b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nt5pV8rouazscDIV4Q1t55e6fej4YNHJZXPzf96Lh7SuroEXuDXqNYv2sIT/aOG7hv1prsNpAIh6XmWX12a4Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:58:39.417161Z","bundle_sha256":"1a11b041e0c1330396ec22ebba8c4e63241cdc0b3dc682d5d3dce87467c78f50"}}