{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GO2AMYNCUUSWYUW5V5UZNIREKO","short_pith_number":"pith:GO2AMYNC","canonical_record":{"source":{"id":"1504.01262","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-04-06T11:14:01Z","cross_cats_sorted":[],"title_canon_sha256":"108378594f914ea63895dd2e65249b91003c76cfd5cf82fb4e4e6593fb67eb38","abstract_canon_sha256":"0eff1db4368b260d49b696b2252264239c510d3bc0135266d994c67635bfca3b"},"schema_version":"1.0"},"canonical_sha256":"33b40661a2a5256c52ddaf6996a224538eb9a46722b2a24561adb2fbcd45b9d8","source":{"kind":"arxiv","id":"1504.01262","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01262","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01262v2","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01262","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"pith_short_12","alias_value":"GO2AMYNCUUSW","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GO2AMYNCUUSWYUW5","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GO2AMYNC","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GO2AMYNCUUSWYUW5V5UZNIREKO","target":"record","payload":{"canonical_record":{"source":{"id":"1504.01262","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-04-06T11:14:01Z","cross_cats_sorted":[],"title_canon_sha256":"108378594f914ea63895dd2e65249b91003c76cfd5cf82fb4e4e6593fb67eb38","abstract_canon_sha256":"0eff1db4368b260d49b696b2252264239c510d3bc0135266d994c67635bfca3b"},"schema_version":"1.0"},"canonical_sha256":"33b40661a2a5256c52ddaf6996a224538eb9a46722b2a24561adb2fbcd45b9d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:59.786583Z","signature_b64":"mf7j+aRjqwyVUkXK2hXI+5rUGaF+FEPsXsmij1ZzCE0cCPbyUBz0a3J1agsDrqZk9xXbWRu2ziFVZDwxi8NKCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33b40661a2a5256c52ddaf6996a224538eb9a46722b2a24561adb2fbcd45b9d8","last_reissued_at":"2026-05-18T01:35:59.786069Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:59.786069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.01262","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":"2026-05-18T01:35:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mcEv4HEhisPNO2SBt+Wschwxf6Z1vVAr9k7migzi+b2+EWKExhL0Ou6Fgqn4mb26zsYObqW9Hm+jNBH9BVRkBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T10:23:52.768259Z"},"content_sha256":"1b62ba759f3fb634b771c94e911aca94ccc8adca58c8368fed0765665cad1f37","schema_version":"1.0","event_id":"sha256:1b62ba759f3fb634b771c94e911aca94ccc8adca58c8368fed0765665cad1f37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GO2AMYNCUUSWYUW5V5UZNIREKO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How clustering dark energy affects matter perturbations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Mehrabi, F. Pace, S. Basilakos","submitted_at":"2015-04-06T11:14:01Z","abstract_excerpt":"The rate of structure formation in the Universe is different in homogeneous and clustered dark energy models. The degree of dark energy clustering depends on the magnitude of its effective sound speed $c^{2}_{\\rm eff}$ and for $c_{\\rm eff}=0$ dark energy clusters in a similar fashion to dark matter while for $c_{\\rm eff}=1$ it stays (approximately) homogeneous. In this paper we consider two distinct equations of state for the dark energy component, $w_{\\rm d}=const$ and $w_{\\rm d}=w_0+w_1\\left(\\frac{z}{1+z}\\right)$ with $c_{\\rm eff}$ as a free parameter and we try to constrain the dark energy "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01262","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":""},"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":"2026-05-18T01:35:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ianMYhSLABQLPJqMAP+68tHFQxcTcD/Bxs3wpNZCAKdLGlCmdaIcHfRjwEr1NK6c0pVTh0CGpYnYfSyeIZOwDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T10:23:52.768613Z"},"content_sha256":"864c4ff109dfc398293d68980a61c02146969ed5abb44c39c1f69656bb92ea83","schema_version":"1.0","event_id":"sha256:864c4ff109dfc398293d68980a61c02146969ed5abb44c39c1f69656bb92ea83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/bundle.json","state_url":"https://pith.science/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/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":"2026-06-21T10:23:52Z","links":{"resolver":"https://pith.science/pith/GO2AMYNCUUSWYUW5V5UZNIREKO","bundle":"https://pith.science/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/bundle.json","state":"https://pith.science/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GO2AMYNCUUSWYUW5V5UZNIREKO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GO2AMYNCUUSWYUW5V5UZNIREKO","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":"0eff1db4368b260d49b696b2252264239c510d3bc0135266d994c67635bfca3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-04-06T11:14:01Z","title_canon_sha256":"108378594f914ea63895dd2e65249b91003c76cfd5cf82fb4e4e6593fb67eb38"},"schema_version":"1.0","source":{"id":"1504.01262","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01262","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01262v2","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01262","created_at":"2026-05-18T01:35:59Z"},{"alias_kind":"pith_short_12","alias_value":"GO2AMYNCUUSW","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GO2AMYNCUUSWYUW5","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GO2AMYNC","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:864c4ff109dfc398293d68980a61c02146969ed5abb44c39c1f69656bb92ea83","target":"graph","created_at":"2026-05-18T01:35:59Z","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":"The rate of structure formation in the Universe is different in homogeneous and clustered dark energy models. The degree of dark energy clustering depends on the magnitude of its effective sound speed $c^{2}_{\\rm eff}$ and for $c_{\\rm eff}=0$ dark energy clusters in a similar fashion to dark matter while for $c_{\\rm eff}=1$ it stays (approximately) homogeneous. In this paper we consider two distinct equations of state for the dark energy component, $w_{\\rm d}=const$ and $w_{\\rm d}=w_0+w_1\\left(\\frac{z}{1+z}\\right)$ with $c_{\\rm eff}$ as a free parameter and we try to constrain the dark energy ","authors_text":"A. Mehrabi, F. Pace, S. Basilakos","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-04-06T11:14:01Z","title":"How clustering dark energy affects matter perturbations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01262","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":"sha256:1b62ba759f3fb634b771c94e911aca94ccc8adca58c8368fed0765665cad1f37","target":"record","created_at":"2026-05-18T01:35:59Z","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":"0eff1db4368b260d49b696b2252264239c510d3bc0135266d994c67635bfca3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-04-06T11:14:01Z","title_canon_sha256":"108378594f914ea63895dd2e65249b91003c76cfd5cf82fb4e4e6593fb67eb38"},"schema_version":"1.0","source":{"id":"1504.01262","kind":"arxiv","version":2}},"canonical_sha256":"33b40661a2a5256c52ddaf6996a224538eb9a46722b2a24561adb2fbcd45b9d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33b40661a2a5256c52ddaf6996a224538eb9a46722b2a24561adb2fbcd45b9d8","first_computed_at":"2026-05-18T01:35:59.786069Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:59.786069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mf7j+aRjqwyVUkXK2hXI+5rUGaF+FEPsXsmij1ZzCE0cCPbyUBz0a3J1agsDrqZk9xXbWRu2ziFVZDwxi8NKCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:59.786583Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.01262","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b62ba759f3fb634b771c94e911aca94ccc8adca58c8368fed0765665cad1f37","sha256:864c4ff109dfc398293d68980a61c02146969ed5abb44c39c1f69656bb92ea83"],"state_sha256":"a8da2656202e8a2c630dba8c5d4eae5866114f17176c7be20b1669b233cbbcbb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0IB4CIa88vcueJobQCU+EaZyYozjhoQmvIQ+LIXqEjrr4uMaBWViPCutpiEfHVnl+ha9loNsq4weiTr+jzw9AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T10:23:52.770552Z","bundle_sha256":"f7a29443ccc1e34e84949605ac04c9925f342aad746771f3c4dd0909bc08511c"}}