{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:66SL42BGX4XDN7YO3NMEHKXWCO","short_pith_number":"pith:66SL42BG","canonical_record":{"source":{"id":"1204.2298","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T22:48:54Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"a2e05e0009de61ef3d2c2b4d37172a6fd80697b995fb00874a14f5c60ade815b","abstract_canon_sha256":"188bbfd8818f7a197de7bb5be133f46d1032b94f6af81b4029c1905df4c6d716"},"schema_version":"1.0"},"canonical_sha256":"f7a4be6826bf2e36ff0edb5843aaf613aa8390db15b0c4dffcc40e0820d75764","source":{"kind":"arxiv","id":"1204.2298","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.2298","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"arxiv_version","alias_value":"1204.2298v1","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.2298","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"pith_short_12","alias_value":"66SL42BGX4XD","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"66SL42BGX4XDN7YO","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"66SL42BG","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:66SL42BGX4XDN7YO3NMEHKXWCO","target":"record","payload":{"canonical_record":{"source":{"id":"1204.2298","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T22:48:54Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"a2e05e0009de61ef3d2c2b4d37172a6fd80697b995fb00874a14f5c60ade815b","abstract_canon_sha256":"188bbfd8818f7a197de7bb5be133f46d1032b94f6af81b4029c1905df4c6d716"},"schema_version":"1.0"},"canonical_sha256":"f7a4be6826bf2e36ff0edb5843aaf613aa8390db15b0c4dffcc40e0820d75764","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:53.817261Z","signature_b64":"4GWqT8Dc5voKBX6nyQKMPBYWudU8YyQg6Q9LsfmbLcfQ27NEKvsXOkjAC+Gls232cI5fizLhGnJ89ciWR4k7Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f7a4be6826bf2e36ff0edb5843aaf613aa8390db15b0c4dffcc40e0820d75764","last_reissued_at":"2026-05-18T01:57:53.816842Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:53.816842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.2298","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":"2026-05-18T01:57:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3b+AqLZYCMnrTzTbzAVNVU5l+MmAddbKzyORJMgDQ1wWfFw4rNV0VeB8s0N/Ca5O9MWdim0QhoRCCIDt0tzhCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T19:00:07.549809Z"},"content_sha256":"a010ba8e964104a9ae13f0ebcf3206c9b9c7fe5448518ed6b90a31d487ebcc1e","schema_version":"1.0","event_id":"sha256:a010ba8e964104a9ae13f0ebcf3206c9b9c7fe5448518ed6b90a31d487ebcc1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:66SL42BGX4XDN7YO3NMEHKXWCO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalar models for the unification of the dark sector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Julio C. Fabris, Mahamadou H. Daouda, Oliver F. Piattella","submitted_at":"2012-04-10T22:48:54Z","abstract_excerpt":"We review the difficulties of the generalized Chaplygin gas model to fit observational data, due to the tension between background and perturbative tests. We argue that such issues may be circumvented by means of a self-interacting scalar field representation of the model. However, this proposal seems to be successful only if the self-interacting scalar field has a non-canonical form. The latter can be implemented in Rastall's theory of gravity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.2298","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":"2026-05-18T01:57:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r/walGJ7XvaEReIbDIw6HMKQLz/eeiqBrhYhJOiYccWS8FlOx4NTPP94KPGVgaIDz37ROigx6/8gBzN5XsHtBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T19:00:07.550684Z"},"content_sha256":"ae663633774d669c7b4a454fd56bc3f5c5c7e5bf227ee6d48dc05b9ca5b444d3","schema_version":"1.0","event_id":"sha256:ae663633774d669c7b4a454fd56bc3f5c5c7e5bf227ee6d48dc05b9ca5b444d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/66SL42BGX4XDN7YO3NMEHKXWCO/bundle.json","state_url":"https://pith.science/pith/66SL42BGX4XDN7YO3NMEHKXWCO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/66SL42BGX4XDN7YO3NMEHKXWCO/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":"2026-06-11T19:00:07Z","links":{"resolver":"https://pith.science/pith/66SL42BGX4XDN7YO3NMEHKXWCO","bundle":"https://pith.science/pith/66SL42BGX4XDN7YO3NMEHKXWCO/bundle.json","state":"https://pith.science/pith/66SL42BGX4XDN7YO3NMEHKXWCO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/66SL42BGX4XDN7YO3NMEHKXWCO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:66SL42BGX4XDN7YO3NMEHKXWCO","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":"188bbfd8818f7a197de7bb5be133f46d1032b94f6af81b4029c1905df4c6d716","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T22:48:54Z","title_canon_sha256":"a2e05e0009de61ef3d2c2b4d37172a6fd80697b995fb00874a14f5c60ade815b"},"schema_version":"1.0","source":{"id":"1204.2298","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.2298","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"arxiv_version","alias_value":"1204.2298v1","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.2298","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"pith_short_12","alias_value":"66SL42BGX4XD","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"66SL42BGX4XDN7YO","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"66SL42BG","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:ae663633774d669c7b4a454fd56bc3f5c5c7e5bf227ee6d48dc05b9ca5b444d3","target":"graph","created_at":"2026-05-18T01:57:53Z","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 review the difficulties of the generalized Chaplygin gas model to fit observational data, due to the tension between background and perturbative tests. We argue that such issues may be circumvented by means of a self-interacting scalar field representation of the model. However, this proposal seems to be successful only if the self-interacting scalar field has a non-canonical form. The latter can be implemented in Rastall's theory of gravity.","authors_text":"Julio C. Fabris, Mahamadou H. Daouda, Oliver F. Piattella","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T22:48:54Z","title":"Scalar models for the unification of the dark sector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.2298","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:a010ba8e964104a9ae13f0ebcf3206c9b9c7fe5448518ed6b90a31d487ebcc1e","target":"record","created_at":"2026-05-18T01:57:53Z","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":"188bbfd8818f7a197de7bb5be133f46d1032b94f6af81b4029c1905df4c6d716","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T22:48:54Z","title_canon_sha256":"a2e05e0009de61ef3d2c2b4d37172a6fd80697b995fb00874a14f5c60ade815b"},"schema_version":"1.0","source":{"id":"1204.2298","kind":"arxiv","version":1}},"canonical_sha256":"f7a4be6826bf2e36ff0edb5843aaf613aa8390db15b0c4dffcc40e0820d75764","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f7a4be6826bf2e36ff0edb5843aaf613aa8390db15b0c4dffcc40e0820d75764","first_computed_at":"2026-05-18T01:57:53.816842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:53.816842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4GWqT8Dc5voKBX6nyQKMPBYWudU8YyQg6Q9LsfmbLcfQ27NEKvsXOkjAC+Gls232cI5fizLhGnJ89ciWR4k7Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:53.817261Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.2298","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a010ba8e964104a9ae13f0ebcf3206c9b9c7fe5448518ed6b90a31d487ebcc1e","sha256:ae663633774d669c7b4a454fd56bc3f5c5c7e5bf227ee6d48dc05b9ca5b444d3"],"state_sha256":"768dd939ab6df3755258d01970ee12962bad69b44756c7e85eb6b45f94772929"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9B0EBOTHuWV0ZGsJ8XVKpo9qILL/3Vz73hV3nHSepuMwtepptZBBwZjkScKc1W7boOfDAAyownvejTVR5IeBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T19:00:07.556970Z","bundle_sha256":"00ee4f2ea652f27ba53549609ab7d74dace0834b5dd4f5316a09176149140525"}}