{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:YKTT572V7C4LHKHN7MMJFFDOLW","short_pith_number":"pith:YKTT572V","canonical_record":{"source":{"id":"astro-ph/9907340","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-24T15:07:02Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"753c33f23a5149dcc11b0d644a4b20b1ebff8093cd9f1d703915ac0189f1571a","abstract_canon_sha256":"8e6bafb6c3d8020387ecf5553694f71ea2e591b6ac67f56d30fa63ed83385d88"},"schema_version":"1.0"},"canonical_sha256":"c2a73eff55f8b8b3a8edfb1892946e5d8e6dbd8bc1d2f237cbe4a6636a12766e","source":{"kind":"arxiv","id":"astro-ph/9907340","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9907340","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907340v1","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907340","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_12","alias_value":"YKTT572V7C4L","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_16","alias_value":"YKTT572V7C4LHKHN","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_8","alias_value":"YKTT572V","created_at":"2026-07-04T15:29:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:YKTT572V7C4LHKHN7MMJFFDOLW","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9907340","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-24T15:07:02Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"753c33f23a5149dcc11b0d644a4b20b1ebff8093cd9f1d703915ac0189f1571a","abstract_canon_sha256":"8e6bafb6c3d8020387ecf5553694f71ea2e591b6ac67f56d30fa63ed83385d88"},"schema_version":"1.0"},"canonical_sha256":"c2a73eff55f8b8b3a8edfb1892946e5d8e6dbd8bc1d2f237cbe4a6636a12766e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:29:18.942633Z","signature_b64":"aaYsm3pK/ieBHUzQw6mWZVfREh16ssyYEwKeJmYCk5SwTS9/5zyovQa1/5979M6hi2qIiSoKvU29LTGjn4BABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2a73eff55f8b8b3a8edfb1892946e5d8e6dbd8bc1d2f237cbe4a6636a12766e","last_reissued_at":"2026-07-04T15:29:18.942169Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:29:18.942169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9907340","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":"2026-07-04T15:29:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a2dPmCe07235x2c70fEfXVQpV+LWx0ScQ9xdwuOFAM6L3ZcqUB5CIXwM8ikqlYgs2SnwCpamo0tHlLaKkWzUAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T15:00:57.735972Z"},"content_sha256":"868b23bdf1f8dc71f51d3412ae7f65f6707d3ae0c12748b895ba39244a8a7376","schema_version":"1.0","event_id":"sha256:868b23bdf1f8dc71f51d3412ae7f65f6707d3ae0c12748b895ba39244a8a7376"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:YKTT572V7C4LHKHN7MMJFFDOLW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Astrophysical Probes of the Constancy of the Velocity of Light","license":"","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph","authors_text":"Academy of Athens), CERN), D.V. Nanopoulos (Texas A, HARC, J. Ellis (CERN), K. Farakos (NTU Athens), M, N.E. Mavromatos (Oxford, U of Athens), V. Mitsou (CERN","submitted_at":"1999-07-24T15:07:02Z","abstract_excerpt":"We discuss possible tests of the constancy of the velocity of light using distant astrophysical sources such as gamma-ray bursters (GRBs), Active Galactic Nuclei (AGNs) and pulsars. This speculative quest may be motivated by some models of quantum fluctuations in the space-time background, and we discuss explicitly how an energy-dependent variation in photon velocity \\delta c/ c \\sim - E / M arises in one particular quantum-gravitational model. We then discuss how data on GRBs may be used to set limits on variations in the velocity of light, which we illustrate using BATSE and OSSE observation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907340","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9907340/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":"2026-07-04T15:29:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K1cwjsJT3ZlD7+0RbUNh/kqVhdEI46a6PJUv+5t7pq9ad2ZZoBsocQVth12umyaRV/kNi5fgZM/6zzprNJGhBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T15:00:57.737381Z"},"content_sha256":"99e2dba8b52eaa3454c53fb1d815da73ec0fd6e854e569ea85f853ca52bf21d9","schema_version":"1.0","event_id":"sha256:99e2dba8b52eaa3454c53fb1d815da73ec0fd6e854e569ea85f853ca52bf21d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YKTT572V7C4LHKHN7MMJFFDOLW/bundle.json","state_url":"https://pith.science/pith/YKTT572V7C4LHKHN7MMJFFDOLW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YKTT572V7C4LHKHN7MMJFFDOLW/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":"2026-08-11T15:00:57Z","links":{"resolver":"https://pith.science/pith/YKTT572V7C4LHKHN7MMJFFDOLW","bundle":"https://pith.science/pith/YKTT572V7C4LHKHN7MMJFFDOLW/bundle.json","state":"https://pith.science/pith/YKTT572V7C4LHKHN7MMJFFDOLW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YKTT572V7C4LHKHN7MMJFFDOLW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:YKTT572V7C4LHKHN7MMJFFDOLW","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":"8e6bafb6c3d8020387ecf5553694f71ea2e591b6ac67f56d30fa63ed83385d88","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-24T15:07:02Z","title_canon_sha256":"753c33f23a5149dcc11b0d644a4b20b1ebff8093cd9f1d703915ac0189f1571a"},"schema_version":"1.0","source":{"id":"astro-ph/9907340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9907340","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907340v1","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907340","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_12","alias_value":"YKTT572V7C4L","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_16","alias_value":"YKTT572V7C4LHKHN","created_at":"2026-07-04T15:29:18Z"},{"alias_kind":"pith_short_8","alias_value":"YKTT572V","created_at":"2026-07-04T15:29:18Z"}],"graph_snapshots":[{"event_id":"sha256:99e2dba8b52eaa3454c53fb1d815da73ec0fd6e854e569ea85f853ca52bf21d9","target":"graph","created_at":"2026-07-04T15:29:18Z","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/9907340/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss possible tests of the constancy of the velocity of light using distant astrophysical sources such as gamma-ray bursters (GRBs), Active Galactic Nuclei (AGNs) and pulsars. This speculative quest may be motivated by some models of quantum fluctuations in the space-time background, and we discuss explicitly how an energy-dependent variation in photon velocity \\delta c/ c \\sim - E / M arises in one particular quantum-gravitational model. We then discuss how data on GRBs may be used to set limits on variations in the velocity of light, which we illustrate using BATSE and OSSE observation","authors_text":"Academy of Athens), CERN), D.V. Nanopoulos (Texas A, HARC, J. Ellis (CERN), K. Farakos (NTU Athens), M, N.E. Mavromatos (Oxford, U of Athens), V. Mitsou (CERN","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-07-24T15:07:02Z","title":"Astrophysical Probes of the Constancy of the Velocity of Light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907340","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":"sha256:868b23bdf1f8dc71f51d3412ae7f65f6707d3ae0c12748b895ba39244a8a7376","target":"record","created_at":"2026-07-04T15:29:18Z","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":"8e6bafb6c3d8020387ecf5553694f71ea2e591b6ac67f56d30fa63ed83385d88","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-24T15:07:02Z","title_canon_sha256":"753c33f23a5149dcc11b0d644a4b20b1ebff8093cd9f1d703915ac0189f1571a"},"schema_version":"1.0","source":{"id":"astro-ph/9907340","kind":"arxiv","version":1}},"canonical_sha256":"c2a73eff55f8b8b3a8edfb1892946e5d8e6dbd8bc1d2f237cbe4a6636a12766e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c2a73eff55f8b8b3a8edfb1892946e5d8e6dbd8bc1d2f237cbe4a6636a12766e","first_computed_at":"2026-07-04T15:29:18.942169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:29:18.942169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aaYsm3pK/ieBHUzQw6mWZVfREh16ssyYEwKeJmYCk5SwTS9/5zyovQa1/5979M6hi2qIiSoKvU29LTGjn4BABw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:29:18.942633Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9907340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:868b23bdf1f8dc71f51d3412ae7f65f6707d3ae0c12748b895ba39244a8a7376","sha256:99e2dba8b52eaa3454c53fb1d815da73ec0fd6e854e569ea85f853ca52bf21d9"],"state_sha256":"d63bd724e83256e27124979f4eb4e76a4dde0d8375e8a24e90a6910b2b1e5fd2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6gRKkEj+ox4HvJ4inrZ0NROwUGmujVdchvrLGXY3t2Bdt9C4prooaI+DLjkEiBk91ZGIv5xLQ+G1ZwqKkTfhAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T15:00:57.744493Z","bundle_sha256":"684a727f6af66a7a8eee9577e2e1724b640b62202424f8381d21724d2957ad04"}}