{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:TPCYJH3EBFFADBNH6SVHK3HF72","short_pith_number":"pith:TPCYJH3E","canonical_record":{"source":{"id":"1307.4578","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-17T11:07:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"8dd46619a7823a0ead7ed6a5ff04d421748c8c61ca8d79787cf3cf37f19b4151","abstract_canon_sha256":"360b61f3ae0f1f2a0bfd482f1cf6df5d89f03345f80f67744b3af5e96161c97c"},"schema_version":"1.0"},"canonical_sha256":"9bc5849f64094a0185a7f4aa756ce5fe943a005dd8dc24f9eddb4fdb247aeca5","source":{"kind":"arxiv","id":"1307.4578","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4578","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4578v1","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4578","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"pith_short_12","alias_value":"TPCYJH3EBFFA","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TPCYJH3EBFFADBNH","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TPCYJH3E","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:TPCYJH3EBFFADBNH6SVHK3HF72","target":"record","payload":{"canonical_record":{"source":{"id":"1307.4578","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-17T11:07:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"8dd46619a7823a0ead7ed6a5ff04d421748c8c61ca8d79787cf3cf37f19b4151","abstract_canon_sha256":"360b61f3ae0f1f2a0bfd482f1cf6df5d89f03345f80f67744b3af5e96161c97c"},"schema_version":"1.0"},"canonical_sha256":"9bc5849f64094a0185a7f4aa756ce5fe943a005dd8dc24f9eddb4fdb247aeca5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:43.517218Z","signature_b64":"e/G9/fH7hKJRqkKjDySddquPD6NMFNjwwbykjFCwmerYax+n+zSJfoL/qRzM1Hf62uP0M+aqJh4sjax4wvZaDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bc5849f64094a0185a7f4aa756ce5fe943a005dd8dc24f9eddb4fdb247aeca5","last_reissued_at":"2026-05-18T01:48:43.516504Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:43.516504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.4578","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":"2026-05-18T01:48:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kuH/rXtty980Ad9Ts/s/8nJ8T/5qkC6CLLin8oXIm3H53FKgCOVnb8FMhddoJURzTAOYQbr0WHKy8pDs2P7iCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:05:19.834300Z"},"content_sha256":"1a420a30f79994c94b03341be31af52b74edd6621d0e63f75fb2f3f6cc94407a","schema_version":"1.0","event_id":"sha256:1a420a30f79994c94b03341be31af52b74edd6621d0e63f75fb2f3f6cc94407a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:TPCYJH3EBFFADBNH6SVHK3HF72","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tests of model predictions for the response of stellar spectra and absorption line indices to element abundance variations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.SR","authors_text":"A. de Castro Milone, A. E. Sansom, A. Vazdekis, P. Sanchez-Blazquez","submitted_at":"2013-07-17T11:07:48Z","abstract_excerpt":"To analyse stellar populations in galaxies a widely used method is to apply theoretically derived responses of stellar spectra and line indices to element abundance variations, hereafter referred to as response functions. These are applied in a differential way, to base models, in order to generate spectra or indices with different abundance patterns. In this paper sets of such response functions for three different stellar evolutionary stages are tested with new empirical [Mg/Fe] abundance data for the MILES stellar spectral library. Recent theoretical models and observations are used to inve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4578","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":"2026-05-18T01:48:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XV4nglr53l61ogXh49fsTZSFDtbBybdPzEWgm98ru5Kt5VsXr4sgcVB8AVX9KLpv9Fg6cCAEmBpX0M+T7FT3AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:05:19.834672Z"},"content_sha256":"6ca9c7991e81c2ed54b7fa723089b7ee6c232fe3c102a4f59742e4a6bd32c976","schema_version":"1.0","event_id":"sha256:6ca9c7991e81c2ed54b7fa723089b7ee6c232fe3c102a4f59742e4a6bd32c976"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TPCYJH3EBFFADBNH6SVHK3HF72/bundle.json","state_url":"https://pith.science/pith/TPCYJH3EBFFADBNH6SVHK3HF72/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TPCYJH3EBFFADBNH6SVHK3HF72/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":"2026-06-01T20:05:19Z","links":{"resolver":"https://pith.science/pith/TPCYJH3EBFFADBNH6SVHK3HF72","bundle":"https://pith.science/pith/TPCYJH3EBFFADBNH6SVHK3HF72/bundle.json","state":"https://pith.science/pith/TPCYJH3EBFFADBNH6SVHK3HF72/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TPCYJH3EBFFADBNH6SVHK3HF72/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TPCYJH3EBFFADBNH6SVHK3HF72","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":"360b61f3ae0f1f2a0bfd482f1cf6df5d89f03345f80f67744b3af5e96161c97c","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-17T11:07:48Z","title_canon_sha256":"8dd46619a7823a0ead7ed6a5ff04d421748c8c61ca8d79787cf3cf37f19b4151"},"schema_version":"1.0","source":{"id":"1307.4578","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4578","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4578v1","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4578","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"pith_short_12","alias_value":"TPCYJH3EBFFA","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TPCYJH3EBFFADBNH","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TPCYJH3E","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:6ca9c7991e81c2ed54b7fa723089b7ee6c232fe3c102a4f59742e4a6bd32c976","target":"graph","created_at":"2026-05-18T01:48:43Z","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":"To analyse stellar populations in galaxies a widely used method is to apply theoretically derived responses of stellar spectra and line indices to element abundance variations, hereafter referred to as response functions. These are applied in a differential way, to base models, in order to generate spectra or indices with different abundance patterns. In this paper sets of such response functions for three different stellar evolutionary stages are tested with new empirical [Mg/Fe] abundance data for the MILES stellar spectral library. Recent theoretical models and observations are used to inve","authors_text":"A. de Castro Milone, A. E. Sansom, A. Vazdekis, P. Sanchez-Blazquez","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-17T11:07:48Z","title":"Tests of model predictions for the response of stellar spectra and absorption line indices to element abundance variations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4578","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":"sha256:1a420a30f79994c94b03341be31af52b74edd6621d0e63f75fb2f3f6cc94407a","target":"record","created_at":"2026-05-18T01:48:43Z","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":"360b61f3ae0f1f2a0bfd482f1cf6df5d89f03345f80f67744b3af5e96161c97c","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-17T11:07:48Z","title_canon_sha256":"8dd46619a7823a0ead7ed6a5ff04d421748c8c61ca8d79787cf3cf37f19b4151"},"schema_version":"1.0","source":{"id":"1307.4578","kind":"arxiv","version":1}},"canonical_sha256":"9bc5849f64094a0185a7f4aa756ce5fe943a005dd8dc24f9eddb4fdb247aeca5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9bc5849f64094a0185a7f4aa756ce5fe943a005dd8dc24f9eddb4fdb247aeca5","first_computed_at":"2026-05-18T01:48:43.516504Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:43.516504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e/G9/fH7hKJRqkKjDySddquPD6NMFNjwwbykjFCwmerYax+n+zSJfoL/qRzM1Hf62uP0M+aqJh4sjax4wvZaDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:43.517218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4578","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a420a30f79994c94b03341be31af52b74edd6621d0e63f75fb2f3f6cc94407a","sha256:6ca9c7991e81c2ed54b7fa723089b7ee6c232fe3c102a4f59742e4a6bd32c976"],"state_sha256":"0843529c0a2b418121acb4b680ebaffdfd9b037cb2652763a64ac4df2f953b97"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ruydsZId6wT7EJR/vBoFgkaU5gzbvWRj7sWzGixD+Y1JDIdL2qi2r6mUX1OFVPVVlPO4CXJBXZHREnDK5ID4Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T20:05:19.836685Z","bundle_sha256":"957885d426d097251763e8649f9f55ecc54d8f5c48ba2a290e12dbfe9dfcd540"}}