{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:CCE5PB6LES2MK65ZHGJSYOZKXW","short_pith_number":"pith:CCE5PB6L","canonical_record":{"source":{"id":"astro-ph/0612457","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-18T20:38:08Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"aef361b90452e205f39ebd072d8422fd83715ff9c3c0457037e64090b21f41fe","abstract_canon_sha256":"9bb40344a838461f2344ca9810e601a4595adec3547df3d1627663bd5f7e8745"},"schema_version":"1.0"},"canonical_sha256":"1089d787cb24b4c57bb939932c3b2abdb762e759cfd83cd58fed856d3f6cec4e","source":{"kind":"arxiv","id":"astro-ph/0612457","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0612457","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0612457v2","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0612457","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"CCE5PB6LES2M","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_16","alias_value":"CCE5PB6LES2MK65Z","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_8","alias_value":"CCE5PB6L","created_at":"2026-07-04T15:21:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:CCE5PB6LES2MK65ZHGJSYOZKXW","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0612457","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-18T20:38:08Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"aef361b90452e205f39ebd072d8422fd83715ff9c3c0457037e64090b21f41fe","abstract_canon_sha256":"9bb40344a838461f2344ca9810e601a4595adec3547df3d1627663bd5f7e8745"},"schema_version":"1.0"},"canonical_sha256":"1089d787cb24b4c57bb939932c3b2abdb762e759cfd83cd58fed856d3f6cec4e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:21:50.671607Z","signature_b64":"yUs+M4IaGbaSZG2hFAQn0COoBOO8BEBjK9kV6cpxesMaI7NLE/9PP0wY4DgxaBLXrECvZq5tfbISNS9QiK+ZAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1089d787cb24b4c57bb939932c3b2abdb762e759cfd83cd58fed856d3f6cec4e","last_reissued_at":"2026-07-04T15:21:50.671196Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:21:50.671196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0612457","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":"2026-07-04T15:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kcs99sYnjeixP39MVR1DVk4+nBugJiaXfIcp6UWATWE9sFq/9fY3PRXYToIXKMAVAvaBDzQdn+f6g9nPhaE1Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:31:10.599992Z"},"content_sha256":"71bbe4e3ee7b80cc6a3e7ca0eaac92f770f4117f4b9a2a2abad6619185441ced","schema_version":"1.0","event_id":"sha256:71bbe4e3ee7b80cc6a3e7ca0eaac92f770f4117f4b9a2a2abad6619185441ced"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:CCE5PB6LES2MK65ZHGJSYOZKXW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Confronting pNGB quintessence with data","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph","authors_text":"Koushik Dutta, Lorenzo Sorbo","submitted_at":"2006-12-18T20:38:08Z","abstract_excerpt":"We analyze the observational constraints on the model where a pseudo-Nambu-Goldstone boson (pNGB) plays the role of dark energy. The constraints are derived by using the latest Gold set of 182 type Ia supernovae and the CMB shift parameter. We allow for both the initial value of the scalar field and the present value of the energy density in the pNGB to vary. We find that - compared to previous analyses - the allowed portion of parameter space has shrunk around the region where the pNGB does not evolve significantly."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0612457","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/astro-ph/0612457/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":"2026-07-04T15:21:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5FqXEjawFWTOO59SXN19aThfu8D1FcqXxn2b3CgC2WxW5gLk2OdT43sXfLVFvZ5n7wP3+evVDgKV7SWFKCOgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:31:10.600383Z"},"content_sha256":"9017a8192994309f04653d8bc2f4141615629b563ca7d6e29acc97451276c84e","schema_version":"1.0","event_id":"sha256:9017a8192994309f04653d8bc2f4141615629b563ca7d6e29acc97451276c84e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/bundle.json","state_url":"https://pith.science/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/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":"2026-07-05T12:31:10Z","links":{"resolver":"https://pith.science/pith/CCE5PB6LES2MK65ZHGJSYOZKXW","bundle":"https://pith.science/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/bundle.json","state":"https://pith.science/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CCE5PB6LES2MK65ZHGJSYOZKXW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:CCE5PB6LES2MK65ZHGJSYOZKXW","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":"9bb40344a838461f2344ca9810e601a4595adec3547df3d1627663bd5f7e8745","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-18T20:38:08Z","title_canon_sha256":"aef361b90452e205f39ebd072d8422fd83715ff9c3c0457037e64090b21f41fe"},"schema_version":"1.0","source":{"id":"astro-ph/0612457","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0612457","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0612457v2","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0612457","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_12","alias_value":"CCE5PB6LES2M","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_16","alias_value":"CCE5PB6LES2MK65Z","created_at":"2026-07-04T15:21:50Z"},{"alias_kind":"pith_short_8","alias_value":"CCE5PB6L","created_at":"2026-07-04T15:21:50Z"}],"graph_snapshots":[{"event_id":"sha256:9017a8192994309f04653d8bc2f4141615629b563ca7d6e29acc97451276c84e","target":"graph","created_at":"2026-07-04T15:21:50Z","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/astro-ph/0612457/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We analyze the observational constraints on the model where a pseudo-Nambu-Goldstone boson (pNGB) plays the role of dark energy. The constraints are derived by using the latest Gold set of 182 type Ia supernovae and the CMB shift parameter. We allow for both the initial value of the scalar field and the present value of the energy density in the pNGB to vary. We find that - compared to previous analyses - the allowed portion of parameter space has shrunk around the region where the pNGB does not evolve significantly.","authors_text":"Koushik Dutta, Lorenzo Sorbo","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-12-18T20:38:08Z","title":"Confronting pNGB quintessence with data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0612457","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":"sha256:71bbe4e3ee7b80cc6a3e7ca0eaac92f770f4117f4b9a2a2abad6619185441ced","target":"record","created_at":"2026-07-04T15:21:50Z","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":"9bb40344a838461f2344ca9810e601a4595adec3547df3d1627663bd5f7e8745","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-18T20:38:08Z","title_canon_sha256":"aef361b90452e205f39ebd072d8422fd83715ff9c3c0457037e64090b21f41fe"},"schema_version":"1.0","source":{"id":"astro-ph/0612457","kind":"arxiv","version":2}},"canonical_sha256":"1089d787cb24b4c57bb939932c3b2abdb762e759cfd83cd58fed856d3f6cec4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1089d787cb24b4c57bb939932c3b2abdb762e759cfd83cd58fed856d3f6cec4e","first_computed_at":"2026-07-04T15:21:50.671196Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:21:50.671196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yUs+M4IaGbaSZG2hFAQn0COoBOO8BEBjK9kV6cpxesMaI7NLE/9PP0wY4DgxaBLXrECvZq5tfbISNS9QiK+ZAw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:21:50.671607Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0612457","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71bbe4e3ee7b80cc6a3e7ca0eaac92f770f4117f4b9a2a2abad6619185441ced","sha256:9017a8192994309f04653d8bc2f4141615629b563ca7d6e29acc97451276c84e"],"state_sha256":"001d628d390d9917d05d68611b54192c76f9861d5520bb748fb549f7171df528"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3siwbRqrucYA+8NOx9B3v64CjvOG78FjpM9DzZ0rS7nxCtfAVwI7UE2TGAAWjPpD+UtT1Nmenn4DQtQW0Id9Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T12:31:10.602262Z","bundle_sha256":"fb5a22b83100d86d2e52d9a04c24222461f14aa3c0fb12b9a15c64eb57c8ce58"}}