{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:W2MPMC2GXX63RPR7XT2ISFKEDL","short_pith_number":"pith:W2MPMC2G","canonical_record":{"source":{"id":"1512.00541","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-12-02T01:49:29Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"dea1a94a4280017c50644d25a979cf72c6ab612a37c1c5635a08d43b2048fc97","abstract_canon_sha256":"b6a1c350bb0fb1a21c7403e7a09995a48dde9d73be9908ee08fd66557baa99f2"},"schema_version":"1.0"},"canonical_sha256":"b698f60b46bdfdb8be3fbcf48915441ac1c0a51b92d595ca91befb787466d5bd","source":{"kind":"arxiv","id":"1512.00541","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.00541","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"arxiv_version","alias_value":"1512.00541v2","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.00541","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"pith_short_12","alias_value":"W2MPMC2GXX63","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W2MPMC2GXX63RPR7","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W2MPMC2G","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:W2MPMC2GXX63RPR7XT2ISFKEDL","target":"record","payload":{"canonical_record":{"source":{"id":"1512.00541","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-12-02T01:49:29Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"dea1a94a4280017c50644d25a979cf72c6ab612a37c1c5635a08d43b2048fc97","abstract_canon_sha256":"b6a1c350bb0fb1a21c7403e7a09995a48dde9d73be9908ee08fd66557baa99f2"},"schema_version":"1.0"},"canonical_sha256":"b698f60b46bdfdb8be3fbcf48915441ac1c0a51b92d595ca91befb787466d5bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:43.791009Z","signature_b64":"Tc8WfwbaDqhpXq3atphMrreS6khvr5EjG5q0SgJ+43uN1Nz07ZcMxw5dHPLhrAzYuprVyyLS+WsvEXThAcuqAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b698f60b46bdfdb8be3fbcf48915441ac1c0a51b92d595ca91befb787466d5bd","last_reissued_at":"2026-05-18T01:15:43.790312Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:43.790312Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.00541","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":"2026-05-18T01:15:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f7oF8en++Ae7UdBO0x366Aqrzx0GhacOey2oO+Daog8HBEefUo6Ffii3chpq4K5VzgSQ5LO/OZ/CKa10ThQcDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:28.009034Z"},"content_sha256":"9576d34ea1ff45593b9b1aa908deddcc91acec69cae8ed75b71cf4c1c688a205","schema_version":"1.0","event_id":"sha256:9576d34ea1ff45593b9b1aa908deddcc91acec69cae8ed75b71cf4c1c688a205"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:W2MPMC2GXX63RPR7XT2ISFKEDL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massive Photon and Dark Energy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Chan-Gyung Park, Phillial Oh, Seyen Kouwn","submitted_at":"2015-12-02T01:49:29Z","abstract_excerpt":"We investigate cosmology of massive electrodynamics and explore the possibility whether massive photon could provide an explanation of the dark energy. The action is given by the scalar-vector-tensor theory of gravity which is obtained by non-minimal coupling of the massive Stueckelberg QED with gravity and its cosmological consequences are studied by paying a particular attention to the role of photon mass. We find that the theory allows cosmological evolution where the radiation- and matter-dominated epochs are followed by a long period of virtually constant dark energy that closely mimics $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.00541","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":"2026-05-18T01:15:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2MH/1OGFQERPKyGSrS97QMr8pK9rwLpTe2ni3zbb6LUOyfpHUplAmioCnuwHSGT+ARPI29ehJgJ9Wj8AoicpBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:28.009683Z"},"content_sha256":"053e081b00f97ac886d817707f65a0035a8b0a5664fec2d4fa2ac65f1ff14da7","schema_version":"1.0","event_id":"sha256:053e081b00f97ac886d817707f65a0035a8b0a5664fec2d4fa2ac65f1ff14da7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/bundle.json","state_url":"https://pith.science/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/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":"2026-05-26T12:17:28Z","links":{"resolver":"https://pith.science/pith/W2MPMC2GXX63RPR7XT2ISFKEDL","bundle":"https://pith.science/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/bundle.json","state":"https://pith.science/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W2MPMC2GXX63RPR7XT2ISFKEDL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:W2MPMC2GXX63RPR7XT2ISFKEDL","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":"b6a1c350bb0fb1a21c7403e7a09995a48dde9d73be9908ee08fd66557baa99f2","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-12-02T01:49:29Z","title_canon_sha256":"dea1a94a4280017c50644d25a979cf72c6ab612a37c1c5635a08d43b2048fc97"},"schema_version":"1.0","source":{"id":"1512.00541","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.00541","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"arxiv_version","alias_value":"1512.00541v2","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.00541","created_at":"2026-05-18T01:15:43Z"},{"alias_kind":"pith_short_12","alias_value":"W2MPMC2GXX63","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W2MPMC2GXX63RPR7","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W2MPMC2G","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:053e081b00f97ac886d817707f65a0035a8b0a5664fec2d4fa2ac65f1ff14da7","target":"graph","created_at":"2026-05-18T01:15:43Z","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":"We investigate cosmology of massive electrodynamics and explore the possibility whether massive photon could provide an explanation of the dark energy. The action is given by the scalar-vector-tensor theory of gravity which is obtained by non-minimal coupling of the massive Stueckelberg QED with gravity and its cosmological consequences are studied by paying a particular attention to the role of photon mass. We find that the theory allows cosmological evolution where the radiation- and matter-dominated epochs are followed by a long period of virtually constant dark energy that closely mimics $","authors_text":"Chan-Gyung Park, Phillial Oh, Seyen Kouwn","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-12-02T01:49:29Z","title":"Massive Photon and Dark Energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.00541","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":"sha256:9576d34ea1ff45593b9b1aa908deddcc91acec69cae8ed75b71cf4c1c688a205","target":"record","created_at":"2026-05-18T01:15:43Z","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":"b6a1c350bb0fb1a21c7403e7a09995a48dde9d73be9908ee08fd66557baa99f2","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-12-02T01:49:29Z","title_canon_sha256":"dea1a94a4280017c50644d25a979cf72c6ab612a37c1c5635a08d43b2048fc97"},"schema_version":"1.0","source":{"id":"1512.00541","kind":"arxiv","version":2}},"canonical_sha256":"b698f60b46bdfdb8be3fbcf48915441ac1c0a51b92d595ca91befb787466d5bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b698f60b46bdfdb8be3fbcf48915441ac1c0a51b92d595ca91befb787466d5bd","first_computed_at":"2026-05-18T01:15:43.790312Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:43.790312Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Tc8WfwbaDqhpXq3atphMrreS6khvr5EjG5q0SgJ+43uN1Nz07ZcMxw5dHPLhrAzYuprVyyLS+WsvEXThAcuqAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:43.791009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.00541","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9576d34ea1ff45593b9b1aa908deddcc91acec69cae8ed75b71cf4c1c688a205","sha256:053e081b00f97ac886d817707f65a0035a8b0a5664fec2d4fa2ac65f1ff14da7"],"state_sha256":"a6245fe6aedb765295069736c250b16ed2f0c215714b5611e7bddc22736191e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J1QEY7jsIV1i/KX3ZxdJLMxyAgbcvpsEDTxGCi493qxJ0HaNVqT3BdYVvbSEfXnbAuXxmk1Td6McGaIV8YrhAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:17:28.013249Z","bundle_sha256":"ab606ce74e6839b3a522e1e003c1701eaffe73de3fdb2e350d0974f6d2271b56"}}