{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LDMLDZKOM33V6EH6FHAS75KM6D","short_pith_number":"pith:LDMLDZKO","canonical_record":{"source":{"id":"1501.00996","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-01-05T21:01:42Z","cross_cats_sorted":["astro-ph.CO","gr-qc","physics.atom-ph"],"title_canon_sha256":"1b58054b1bd6a65ec6d88aa460d73801bc944dfe7484b4016158f5f69dde93f3","abstract_canon_sha256":"3d9bd821f14b33afe0cb3878d1047f4bd544f4d22b7991eec550339bd720f765"},"schema_version":"1.0"},"canonical_sha256":"58d8b1e54e66f75f10fe29c12ff54cf0e46f290beca47c9eea6b9bf6ed17ba2a","source":{"kind":"arxiv","id":"1501.00996","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00996","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00996v2","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00996","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"pith_short_12","alias_value":"LDMLDZKOM33V","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LDMLDZKOM33V6EH6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LDMLDZKO","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LDMLDZKOM33V6EH6FHAS75KM6D","target":"record","payload":{"canonical_record":{"source":{"id":"1501.00996","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-01-05T21:01:42Z","cross_cats_sorted":["astro-ph.CO","gr-qc","physics.atom-ph"],"title_canon_sha256":"1b58054b1bd6a65ec6d88aa460d73801bc944dfe7484b4016158f5f69dde93f3","abstract_canon_sha256":"3d9bd821f14b33afe0cb3878d1047f4bd544f4d22b7991eec550339bd720f765"},"schema_version":"1.0"},"canonical_sha256":"58d8b1e54e66f75f10fe29c12ff54cf0e46f290beca47c9eea6b9bf6ed17ba2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:31.070239Z","signature_b64":"wtLPZYsKXnl5qz5ByseFVleJ0sn9dfx2nXZ0UfnUCG6K47tdWki4LwOy0hvUmoPT1RyGsE/iwXPGmYnRvALECw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58d8b1e54e66f75f10fe29c12ff54cf0e46f290beca47c9eea6b9bf6ed17ba2a","last_reissued_at":"2026-05-18T02:28:31.069573Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:31.069573Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.00996","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":"2026-05-18T02:28:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1wvg+YC6Q44qaa8iuXYIPWeqIqwFLXO0t9/axzi/8FMRO9gWfUiszkGB3U4XoULWTsZ4zNYTOfMAu8xjKFqZBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:07:16.145519Z"},"content_sha256":"ede06900925b12b8741db2513d9c7f6db8e6c96af941a86b15b80a2c14555285","schema_version":"1.0","event_id":"sha256:ede06900925b12b8741db2513d9c7f6db8e6c96af941a86b15b80a2c14555285"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LDMLDZKOM33V6EH6FHAS75KM6D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Using Atomic Clocks to Detect Gravitational Waves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","physics.atom-ph"],"primary_cat":"astro-ph.IM","authors_text":"Abraham Loeb, Dan Maoz","submitted_at":"2015-01-05T21:01:42Z","abstract_excerpt":"Atomic clocks have recently reached a fractional timing precision of $<10^{-18}$. We point out that an array of atomic clocks, distributed along the Earth's orbit around the Sun, will have the sensitivity needed to detect the time dilation effect of mHz gravitational waves (GWs), such as those emitted by supermassive black hole binaries at cosmological distances. Simultaneous measurement of clock-rates at different phases of a passing GW provides an attractive alternative to the interferometric detection of temporal variations in distance between test masses separated by less than a GW wavelen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00996","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":"2026-05-18T02:28:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v4iVujMh0fKn5qt1J95fnYCdH1Plis3vQrD7WIavp3oY0ys//CQ2N/QxqI7mCoTEjFEEHVhjXDRVQy/btwFuCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T05:07:16.145877Z"},"content_sha256":"b173491ddbbdb02dcdb3a6d2ab78cc064ceb62d85e32ac8a0fe088ba2fa80a22","schema_version":"1.0","event_id":"sha256:b173491ddbbdb02dcdb3a6d2ab78cc064ceb62d85e32ac8a0fe088ba2fa80a22"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LDMLDZKOM33V6EH6FHAS75KM6D/bundle.json","state_url":"https://pith.science/pith/LDMLDZKOM33V6EH6FHAS75KM6D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LDMLDZKOM33V6EH6FHAS75KM6D/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":"2026-05-30T05:07:16Z","links":{"resolver":"https://pith.science/pith/LDMLDZKOM33V6EH6FHAS75KM6D","bundle":"https://pith.science/pith/LDMLDZKOM33V6EH6FHAS75KM6D/bundle.json","state":"https://pith.science/pith/LDMLDZKOM33V6EH6FHAS75KM6D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LDMLDZKOM33V6EH6FHAS75KM6D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LDMLDZKOM33V6EH6FHAS75KM6D","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":"3d9bd821f14b33afe0cb3878d1047f4bd544f4d22b7991eec550339bd720f765","cross_cats_sorted":["astro-ph.CO","gr-qc","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-01-05T21:01:42Z","title_canon_sha256":"1b58054b1bd6a65ec6d88aa460d73801bc944dfe7484b4016158f5f69dde93f3"},"schema_version":"1.0","source":{"id":"1501.00996","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.00996","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"arxiv_version","alias_value":"1501.00996v2","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.00996","created_at":"2026-05-18T02:28:31Z"},{"alias_kind":"pith_short_12","alias_value":"LDMLDZKOM33V","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LDMLDZKOM33V6EH6","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LDMLDZKO","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:b173491ddbbdb02dcdb3a6d2ab78cc064ceb62d85e32ac8a0fe088ba2fa80a22","target":"graph","created_at":"2026-05-18T02:28:31Z","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":"Atomic clocks have recently reached a fractional timing precision of $<10^{-18}$. We point out that an array of atomic clocks, distributed along the Earth's orbit around the Sun, will have the sensitivity needed to detect the time dilation effect of mHz gravitational waves (GWs), such as those emitted by supermassive black hole binaries at cosmological distances. Simultaneous measurement of clock-rates at different phases of a passing GW provides an attractive alternative to the interferometric detection of temporal variations in distance between test masses separated by less than a GW wavelen","authors_text":"Abraham Loeb, Dan Maoz","cross_cats":["astro-ph.CO","gr-qc","physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-01-05T21:01:42Z","title":"Using Atomic Clocks to Detect Gravitational Waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00996","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:ede06900925b12b8741db2513d9c7f6db8e6c96af941a86b15b80a2c14555285","target":"record","created_at":"2026-05-18T02:28:31Z","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":"3d9bd821f14b33afe0cb3878d1047f4bd544f4d22b7991eec550339bd720f765","cross_cats_sorted":["astro-ph.CO","gr-qc","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-01-05T21:01:42Z","title_canon_sha256":"1b58054b1bd6a65ec6d88aa460d73801bc944dfe7484b4016158f5f69dde93f3"},"schema_version":"1.0","source":{"id":"1501.00996","kind":"arxiv","version":2}},"canonical_sha256":"58d8b1e54e66f75f10fe29c12ff54cf0e46f290beca47c9eea6b9bf6ed17ba2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58d8b1e54e66f75f10fe29c12ff54cf0e46f290beca47c9eea6b9bf6ed17ba2a","first_computed_at":"2026-05-18T02:28:31.069573Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:31.069573Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wtLPZYsKXnl5qz5ByseFVleJ0sn9dfx2nXZ0UfnUCG6K47tdWki4LwOy0hvUmoPT1RyGsE/iwXPGmYnRvALECw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:31.070239Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.00996","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ede06900925b12b8741db2513d9c7f6db8e6c96af941a86b15b80a2c14555285","sha256:b173491ddbbdb02dcdb3a6d2ab78cc064ceb62d85e32ac8a0fe088ba2fa80a22"],"state_sha256":"dee18c0656f1911a0323c9d380de44da6af80045824bd3a01f41da8c9cb6849e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s2yws3R+wRbU2GUzGc+3Et7KbZA/1/Fy8Npv6BI86EJU9Mjyc+TzUvokcpWOy6YehC7dAjwPErPeWMk/7CSYCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T05:07:16.147933Z","bundle_sha256":"8aca8ceb4d825a1af785aa2fa1bed9214c10115baaa1c5b8bb1c6691eab78b7d"}}