{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:GADXZAIZKEHHKYGEILO7YSRHM3","short_pith_number":"pith:GADXZAIZ","canonical_record":{"source":{"id":"1303.3551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-14T18:52:33Z","cross_cats_sorted":[],"title_canon_sha256":"8beed370727670926ad63843f6fcc1032ec22093301f138e1b950eab00459256","abstract_canon_sha256":"0e7a2b9cdefad53ab21b8c5b0a723bbc6d614ce73a7ad425f86707ffe5a568bf"},"schema_version":"1.0"},"canonical_sha256":"30077c8119510e7560c442ddfc4a2766dc41d31247185ea34429a243c973c2f5","source":{"kind":"arxiv","id":"1303.3551","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3551","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3551v1","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3551","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"pith_short_12","alias_value":"GADXZAIZKEHH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GADXZAIZKEHHKYGE","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GADXZAIZ","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:GADXZAIZKEHHKYGEILO7YSRHM3","target":"record","payload":{"canonical_record":{"source":{"id":"1303.3551","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-14T18:52:33Z","cross_cats_sorted":[],"title_canon_sha256":"8beed370727670926ad63843f6fcc1032ec22093301f138e1b950eab00459256","abstract_canon_sha256":"0e7a2b9cdefad53ab21b8c5b0a723bbc6d614ce73a7ad425f86707ffe5a568bf"},"schema_version":"1.0"},"canonical_sha256":"30077c8119510e7560c442ddfc4a2766dc41d31247185ea34429a243c973c2f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:07.204018Z","signature_b64":"F6VITSFK7iwOuTGJoCF0MLQggVgoegKyZAPghRBXbDq6dmaEaIq60iwgYTq95f5g8/iAqrkX+ACu90gStQxSAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"30077c8119510e7560c442ddfc4a2766dc41d31247185ea34429a243c973c2f5","last_reissued_at":"2026-05-18T01:51:07.203401Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:07.203401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.3551","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":"2026-05-18T01:51:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gBLXFNbhe6rzLdHh1bDL8PxAaPH7cxMYwtZV75qAhp8ROzpiPMcWFUx1d803ecR9skc5K6ZqIqYFIRTnoJ54Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:00:13.253596Z"},"content_sha256":"181a8dac87b335992c959d9bbd02ffebf6dbb32176ad1e6421b33ad5fde37c54","schema_version":"1.0","event_id":"sha256:181a8dac87b335992c959d9bbd02ffebf6dbb32176ad1e6421b33ad5fde37c54"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:GADXZAIZKEHHKYGEILO7YSRHM3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The different star-formation histories of blue and red spiral and elliptical galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Claudia Maraston (ICG, Daniel Thomas (ICG, Joshua Richards (Imperial College London), Karen L. Masters (ICG, Portsmouth), Ramin Skibba (University of California), Rita Tojeiro (ICG, Robert C. Nichol (ICG, Steven P. Bamford (Nottingham), Will J. Percival (ICG","submitted_at":"2013-03-14T18:52:33Z","abstract_excerpt":"[Abridged] We study the spectral properties of intermediate mass galaxies as a function of colour and morphology. We use Galaxy Zoo to define three morphological classes of galaxies, namely early-types (ellipticals), late-type (disk-dominated) face-on spirals and early-type (bulge-dominated) face-on spirals. We classify these galaxies as blue or red according to their SDSS g-r colour and use the spectral fitting code VESPA to calculate time-resolved star-formation histories, metallicity and total starlight dust extinction from their SDSS fibre spectra. We find that red late-type spirals show l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3551","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":"2026-05-18T01:51:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PpNOZGf1KxP1K4h8K8wZBeVayOa9ElNNK5hsMXeoZwZsteYZ4onS33HD7hHzy+dCdNFtZkeKlnYuQmsmXJ80CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:00:13.254191Z"},"content_sha256":"7e535163368e8d4343b549d3597072e41f95069f632ef0097086b54c3be0554d","schema_version":"1.0","event_id":"sha256:7e535163368e8d4343b549d3597072e41f95069f632ef0097086b54c3be0554d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GADXZAIZKEHHKYGEILO7YSRHM3/bundle.json","state_url":"https://pith.science/pith/GADXZAIZKEHHKYGEILO7YSRHM3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GADXZAIZKEHHKYGEILO7YSRHM3/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":"2026-05-28T08:00:13Z","links":{"resolver":"https://pith.science/pith/GADXZAIZKEHHKYGEILO7YSRHM3","bundle":"https://pith.science/pith/GADXZAIZKEHHKYGEILO7YSRHM3/bundle.json","state":"https://pith.science/pith/GADXZAIZKEHHKYGEILO7YSRHM3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GADXZAIZKEHHKYGEILO7YSRHM3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:GADXZAIZKEHHKYGEILO7YSRHM3","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":"0e7a2b9cdefad53ab21b8c5b0a723bbc6d614ce73a7ad425f86707ffe5a568bf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-14T18:52:33Z","title_canon_sha256":"8beed370727670926ad63843f6fcc1032ec22093301f138e1b950eab00459256"},"schema_version":"1.0","source":{"id":"1303.3551","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3551","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3551v1","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3551","created_at":"2026-05-18T01:51:07Z"},{"alias_kind":"pith_short_12","alias_value":"GADXZAIZKEHH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GADXZAIZKEHHKYGE","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GADXZAIZ","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:7e535163368e8d4343b549d3597072e41f95069f632ef0097086b54c3be0554d","target":"graph","created_at":"2026-05-18T01:51:07Z","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":"[Abridged] We study the spectral properties of intermediate mass galaxies as a function of colour and morphology. We use Galaxy Zoo to define three morphological classes of galaxies, namely early-types (ellipticals), late-type (disk-dominated) face-on spirals and early-type (bulge-dominated) face-on spirals. We classify these galaxies as blue or red according to their SDSS g-r colour and use the spectral fitting code VESPA to calculate time-resolved star-formation histories, metallicity and total starlight dust extinction from their SDSS fibre spectra. We find that red late-type spirals show l","authors_text":"Claudia Maraston (ICG, Daniel Thomas (ICG, Joshua Richards (Imperial College London), Karen L. Masters (ICG, Portsmouth), Ramin Skibba (University of California), Rita Tojeiro (ICG, Robert C. Nichol (ICG, Steven P. Bamford (Nottingham), Will J. Percival (ICG","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-14T18:52:33Z","title":"The different star-formation histories of blue and red spiral and elliptical galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3551","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":"sha256:181a8dac87b335992c959d9bbd02ffebf6dbb32176ad1e6421b33ad5fde37c54","target":"record","created_at":"2026-05-18T01:51:07Z","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":"0e7a2b9cdefad53ab21b8c5b0a723bbc6d614ce73a7ad425f86707ffe5a568bf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-14T18:52:33Z","title_canon_sha256":"8beed370727670926ad63843f6fcc1032ec22093301f138e1b950eab00459256"},"schema_version":"1.0","source":{"id":"1303.3551","kind":"arxiv","version":1}},"canonical_sha256":"30077c8119510e7560c442ddfc4a2766dc41d31247185ea34429a243c973c2f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"30077c8119510e7560c442ddfc4a2766dc41d31247185ea34429a243c973c2f5","first_computed_at":"2026-05-18T01:51:07.203401Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:07.203401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F6VITSFK7iwOuTGJoCF0MLQggVgoegKyZAPghRBXbDq6dmaEaIq60iwgYTq95f5g8/iAqrkX+ACu90gStQxSAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:07.204018Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.3551","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:181a8dac87b335992c959d9bbd02ffebf6dbb32176ad1e6421b33ad5fde37c54","sha256:7e535163368e8d4343b549d3597072e41f95069f632ef0097086b54c3be0554d"],"state_sha256":"983984f5a410b5f4f279cb99d07a175dc1fcd9afb0a2116249b4379b818b8835"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"opb3y01ETujmxTiXFMPIVj02kPhwXwBjX8CJSl72GMfAOAVY5VHxtfzxm167w2/1ZL7dGcXHdjHDNFGT3WN3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:00:13.257056Z","bundle_sha256":"60125a6f51459a78483e36fa47f9aaf9615f190fd1ccbea618b7670d381b1ba4"}}