{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:53FYSSDEA3XOEV3XYG2RT3T373","short_pith_number":"pith:53FYSSDE","canonical_record":{"source":{"id":"0912.3428","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-17T15:21:21Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"dc17e8faa983a91f2ff560575f76fbbf89022b3c8f266449d8b8e5bf02bd464a","abstract_canon_sha256":"bf2f15a72447b768d63a7172bc90f26f0b474e9b5236a5420c26e63b03e90c2c"},"schema_version":"1.0"},"canonical_sha256":"eecb89486406eee25777c1b519ee7bfedf04bd26b5666a250d19d7b2e5068d97","source":{"kind":"arxiv","id":"0912.3428","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.3428","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"arxiv_version","alias_value":"0912.3428v1","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.3428","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"pith_short_12","alias_value":"53FYSSDEA3XO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"53FYSSDEA3XOEV3X","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"53FYSSDE","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:53FYSSDEA3XOEV3XYG2RT3T373","target":"record","payload":{"canonical_record":{"source":{"id":"0912.3428","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-17T15:21:21Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"dc17e8faa983a91f2ff560575f76fbbf89022b3c8f266449d8b8e5bf02bd464a","abstract_canon_sha256":"bf2f15a72447b768d63a7172bc90f26f0b474e9b5236a5420c26e63b03e90c2c"},"schema_version":"1.0"},"canonical_sha256":"eecb89486406eee25777c1b519ee7bfedf04bd26b5666a250d19d7b2e5068d97","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:22.878952Z","signature_b64":"2o2fQOGRBSefJubQb7B9I1DkO7+PZrZ8VZ57sU+MmBlZWfPj1euMdEQZAiZxA0tczPJMjWoPd9ZUAMVI6lXwAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eecb89486406eee25777c1b519ee7bfedf04bd26b5666a250d19d7b2e5068d97","last_reissued_at":"2026-05-18T04:21:22.878510Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:22.878510Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.3428","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":"2026-05-18T04:21:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YxRaG+0mURnk8zk56tlKKqmgBqGHiwAgAbFgoa+wHoIUN7u9BPMD+HzSKFIcpJzw0mgWToiL4n+MCnRGSpJjAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:25:25.492697Z"},"content_sha256":"a77d53e15e9cf7cda92fca38996ab5a712c95ef3e075abf476ce81575f7b070d","schema_version":"1.0","event_id":"sha256:a77d53e15e9cf7cda92fca38996ab5a712c95ef3e075abf476ce81575f7b070d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:53FYSSDEA3XOEV3XYG2RT3T373","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"D-Foam Phenomenology: Dark Energy, the Velocity of Light and a Possible D-Void","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Dimitri V. Nanopoulos, John Ellis, Nick E. Mavromatos","submitted_at":"2009-12-17T15:21:21Z","abstract_excerpt":"In a D-brane model of space-time foam, there are contributions to the dark energy that depend on the D-brane velocities and on the density of D-particle defects. The latter may also reduce the speeds of photons linearly with their energies, establishing a phenomenological connection with astrophysical probes of the universality of the velocity of light. Specifically, the cosmological dark energy density measured at the present epoch may be linked to the apparent retardation of energetic photons propagating from nearby AGNs. However, this nascent field of `D-foam phenomenology' may be complicat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.3428","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":"2026-05-18T04:21:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8r+laRIb484w4tHBRXQ2jnRxQJaaq27EA9TBcYzyFKbAhbpXmn5K6m86tPdgyMucNSpg4MqltBOGPSOVPMqYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:25:25.493047Z"},"content_sha256":"5aac446bd2b387596ce23426f0ac368777a9521d964dfa168be7a14b73516aa0","schema_version":"1.0","event_id":"sha256:5aac446bd2b387596ce23426f0ac368777a9521d964dfa168be7a14b73516aa0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/53FYSSDEA3XOEV3XYG2RT3T373/bundle.json","state_url":"https://pith.science/pith/53FYSSDEA3XOEV3XYG2RT3T373/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/53FYSSDEA3XOEV3XYG2RT3T373/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":"2026-06-03T08:25:25Z","links":{"resolver":"https://pith.science/pith/53FYSSDEA3XOEV3XYG2RT3T373","bundle":"https://pith.science/pith/53FYSSDEA3XOEV3XYG2RT3T373/bundle.json","state":"https://pith.science/pith/53FYSSDEA3XOEV3XYG2RT3T373/state.json","well_known_bundle":"https://pith.science/.well-known/pith/53FYSSDEA3XOEV3XYG2RT3T373/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:53FYSSDEA3XOEV3XYG2RT3T373","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":"bf2f15a72447b768d63a7172bc90f26f0b474e9b5236a5420c26e63b03e90c2c","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-17T15:21:21Z","title_canon_sha256":"dc17e8faa983a91f2ff560575f76fbbf89022b3c8f266449d8b8e5bf02bd464a"},"schema_version":"1.0","source":{"id":"0912.3428","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.3428","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"arxiv_version","alias_value":"0912.3428v1","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.3428","created_at":"2026-05-18T04:21:22Z"},{"alias_kind":"pith_short_12","alias_value":"53FYSSDEA3XO","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"53FYSSDEA3XOEV3X","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"53FYSSDE","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:5aac446bd2b387596ce23426f0ac368777a9521d964dfa168be7a14b73516aa0","target":"graph","created_at":"2026-05-18T04:21:22Z","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":"In a D-brane model of space-time foam, there are contributions to the dark energy that depend on the D-brane velocities and on the density of D-particle defects. The latter may also reduce the speeds of photons linearly with their energies, establishing a phenomenological connection with astrophysical probes of the universality of the velocity of light. Specifically, the cosmological dark energy density measured at the present epoch may be linked to the apparent retardation of energetic photons propagating from nearby AGNs. However, this nascent field of `D-foam phenomenology' may be complicat","authors_text":"Dimitri V. Nanopoulos, John Ellis, Nick E. Mavromatos","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-17T15:21:21Z","title":"D-Foam Phenomenology: Dark Energy, the Velocity of Light and a Possible D-Void"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.3428","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:a77d53e15e9cf7cda92fca38996ab5a712c95ef3e075abf476ce81575f7b070d","target":"record","created_at":"2026-05-18T04:21:22Z","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":"bf2f15a72447b768d63a7172bc90f26f0b474e9b5236a5420c26e63b03e90c2c","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-17T15:21:21Z","title_canon_sha256":"dc17e8faa983a91f2ff560575f76fbbf89022b3c8f266449d8b8e5bf02bd464a"},"schema_version":"1.0","source":{"id":"0912.3428","kind":"arxiv","version":1}},"canonical_sha256":"eecb89486406eee25777c1b519ee7bfedf04bd26b5666a250d19d7b2e5068d97","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eecb89486406eee25777c1b519ee7bfedf04bd26b5666a250d19d7b2e5068d97","first_computed_at":"2026-05-18T04:21:22.878510Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:22.878510Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2o2fQOGRBSefJubQb7B9I1DkO7+PZrZ8VZ57sU+MmBlZWfPj1euMdEQZAiZxA0tczPJMjWoPd9ZUAMVI6lXwAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:22.878952Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.3428","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a77d53e15e9cf7cda92fca38996ab5a712c95ef3e075abf476ce81575f7b070d","sha256:5aac446bd2b387596ce23426f0ac368777a9521d964dfa168be7a14b73516aa0"],"state_sha256":"92ecf0bc8803dc19a5dff5969f8720e09e373d92b75da56cb5a474fe4ea8a505"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"48bxvtoFgT13Y3l9jyL/ZWZ645bgY8DxfZXOCY/RN/5I4e2TK+ahjH6JThRXwRYO7wKhS7iLOL/jkMb+LdhCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T08:25:25.495038Z","bundle_sha256":"04afe10e8fe09d1009e0a15525fcb6547b45e79e3a1bf328eec8af988dd06027"}}