{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AWDZNEMNMN3BEG3ITHZT5G6ORS","short_pith_number":"pith:AWDZNEMN","canonical_record":{"source":{"id":"1211.1386","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-06T21:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"de5690394bbb3cc036884e23a0e3f8ffed0c9b1c51deb6d6261208a94d3baa05","abstract_canon_sha256":"d1adb7ce79cf03c4876b1c7ef78394be3a47353e42d74a10632534a89c771115"},"schema_version":"1.0"},"canonical_sha256":"058796918d6376121b6899f33e9bce8cb2f4cb8d4040cb50e681692b4ae0294a","source":{"kind":"arxiv","id":"1211.1386","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.1386","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"arxiv_version","alias_value":"1211.1386v1","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.1386","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"pith_short_12","alias_value":"AWDZNEMNMN3B","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AWDZNEMNMN3BEG3I","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AWDZNEMN","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AWDZNEMNMN3BEG3ITHZT5G6ORS","target":"record","payload":{"canonical_record":{"source":{"id":"1211.1386","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-06T21:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"de5690394bbb3cc036884e23a0e3f8ffed0c9b1c51deb6d6261208a94d3baa05","abstract_canon_sha256":"d1adb7ce79cf03c4876b1c7ef78394be3a47353e42d74a10632534a89c771115"},"schema_version":"1.0"},"canonical_sha256":"058796918d6376121b6899f33e9bce8cb2f4cb8d4040cb50e681692b4ae0294a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:24.784969Z","signature_b64":"nhzyIbk8wyhrLJ4evOBtUiA0u5XSRTSPwOkfDV8O56VtmU84ar/RlJzGEXsuIcjS9at9GKb+H0YWEld7xrpnBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"058796918d6376121b6899f33e9bce8cb2f4cb8d4040cb50e681692b4ae0294a","last_reissued_at":"2026-05-18T01:53:24.784582Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:24.784582Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.1386","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":"2026-05-18T01:53:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6x4INyFALHWz8Wl1RyhfBFo0YHwBio0LZ94lgduBNe8W02Zbpz9aoxaGRSz0gONcggXdSDcksB0jBXjd5gQMDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:36.353733Z"},"content_sha256":"cf14768616c6c9b878c8a3be8d8b2dda80a158ba2de3924af45bc56a0d0f55f5","schema_version":"1.0","event_id":"sha256:cf14768616c6c9b878c8a3be8d8b2dda80a158ba2de3924af45bc56a0d0f55f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AWDZNEMNMN3BEG3ITHZT5G6ORS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SNe Ia host galaxy properties from Sloan Digital Sky Survey-II spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"2), (2) MPA Garching, 3), (3) SepNet, 4), (4) NOAO Tucson, (5) UWC Cape Town, 6), (6) MPE Garching, (7) U Pennsylvania, (8) Pennsylvania State U), Alessandra Beifiori (1, Claudia Maraston (1, Daniel Thomas (1, Donald P. Schneider (8) ((1) ICG Portsmouth, Hubert Lampeitl (1), Janine Pforr (1, Jonas Johansson (1, Mathew Smith (5), Ravi R. Gupta (7), Robert C. Nichol (1","submitted_at":"2012-11-06T21:00:04Z","abstract_excerpt":"We study the stellar populations of SNe Ia host galaxies using SDSS-II spectroscopy. We focus on the relationships of SNe Ia properties with stellar velocity dispersion and the stellar population parameters age, metallicity and element abundance ratios derived by fitting absorption line indices to stellar population models. We concentrate on a sub-sample of 84 SNe Ia from the SDSS-II Supernova Survey. In agreement with previous findings, we find that SALT2 stretch factor values show the strongest dependence on stellar population age. Hence, SNe Ia peak-luminosity is closely related to the age "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.1386","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":"2026-05-18T01:53:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ohv9nzD0Vct8Avhm8ucsgTkT9/FIvL1dm6L01pA/LBVrLnDznJKUAj1bDJx5pqLt9buJ9n9Eqs8aHYW8DEZmAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:57:36.354094Z"},"content_sha256":"2cb271d540c916d614043cbd77167c4c4bcd8bbaa116bc3686422c1ac8f70c04","schema_version":"1.0","event_id":"sha256:2cb271d540c916d614043cbd77167c4c4bcd8bbaa116bc3686422c1ac8f70c04"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/bundle.json","state_url":"https://pith.science/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/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":"2026-05-26T21:57:36Z","links":{"resolver":"https://pith.science/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS","bundle":"https://pith.science/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/bundle.json","state":"https://pith.science/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AWDZNEMNMN3BEG3ITHZT5G6ORS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AWDZNEMNMN3BEG3ITHZT5G6ORS","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":"d1adb7ce79cf03c4876b1c7ef78394be3a47353e42d74a10632534a89c771115","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-06T21:00:04Z","title_canon_sha256":"de5690394bbb3cc036884e23a0e3f8ffed0c9b1c51deb6d6261208a94d3baa05"},"schema_version":"1.0","source":{"id":"1211.1386","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.1386","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"arxiv_version","alias_value":"1211.1386v1","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.1386","created_at":"2026-05-18T01:53:24Z"},{"alias_kind":"pith_short_12","alias_value":"AWDZNEMNMN3B","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AWDZNEMNMN3BEG3I","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AWDZNEMN","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:2cb271d540c916d614043cbd77167c4c4bcd8bbaa116bc3686422c1ac8f70c04","target":"graph","created_at":"2026-05-18T01:53:24Z","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 study the stellar populations of SNe Ia host galaxies using SDSS-II spectroscopy. We focus on the relationships of SNe Ia properties with stellar velocity dispersion and the stellar population parameters age, metallicity and element abundance ratios derived by fitting absorption line indices to stellar population models. We concentrate on a sub-sample of 84 SNe Ia from the SDSS-II Supernova Survey. In agreement with previous findings, we find that SALT2 stretch factor values show the strongest dependence on stellar population age. Hence, SNe Ia peak-luminosity is closely related to the age ","authors_text":"2), (2) MPA Garching, 3), (3) SepNet, 4), (4) NOAO Tucson, (5) UWC Cape Town, 6), (6) MPE Garching, (7) U Pennsylvania, (8) Pennsylvania State U), Alessandra Beifiori (1, Claudia Maraston (1, Daniel Thomas (1, Donald P. Schneider (8) ((1) ICG Portsmouth, Hubert Lampeitl (1), Janine Pforr (1, Jonas Johansson (1, Mathew Smith (5), Ravi R. Gupta (7), Robert C. Nichol (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-06T21:00:04Z","title":"SNe Ia host galaxy properties from Sloan Digital Sky Survey-II spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.1386","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:cf14768616c6c9b878c8a3be8d8b2dda80a158ba2de3924af45bc56a0d0f55f5","target":"record","created_at":"2026-05-18T01:53:24Z","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":"d1adb7ce79cf03c4876b1c7ef78394be3a47353e42d74a10632534a89c771115","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-06T21:00:04Z","title_canon_sha256":"de5690394bbb3cc036884e23a0e3f8ffed0c9b1c51deb6d6261208a94d3baa05"},"schema_version":"1.0","source":{"id":"1211.1386","kind":"arxiv","version":1}},"canonical_sha256":"058796918d6376121b6899f33e9bce8cb2f4cb8d4040cb50e681692b4ae0294a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"058796918d6376121b6899f33e9bce8cb2f4cb8d4040cb50e681692b4ae0294a","first_computed_at":"2026-05-18T01:53:24.784582Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:24.784582Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nhzyIbk8wyhrLJ4evOBtUiA0u5XSRTSPwOkfDV8O56VtmU84ar/RlJzGEXsuIcjS9at9GKb+H0YWEld7xrpnBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:24.784969Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.1386","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf14768616c6c9b878c8a3be8d8b2dda80a158ba2de3924af45bc56a0d0f55f5","sha256:2cb271d540c916d614043cbd77167c4c4bcd8bbaa116bc3686422c1ac8f70c04"],"state_sha256":"8e5226649396c355ee0d60533cca8cb38c1212a57637eb496996a9ffbebff052"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O+srZrmZY/PuEaqpGTMcKY6yGbMSUkBYau2L0kip3ul2yuqwORg0Y84YdccQGb4C6ZZd8vj9FOhVYcws6MX9Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:57:36.356360Z","bundle_sha256":"8ac405d5ee5dea402d7df7ebfc53d4a78ab8c28c2a69fdd671a07bd504a93662"}}