{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:EIP73M3XSTCC4AEA6M4CNV2Q32","short_pith_number":"pith:EIP73M3X","canonical_record":{"source":{"id":"2201.10512","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-01-25T18:16:27Z","cross_cats_sorted":[],"title_canon_sha256":"25cadb6178a00125bfc80e5585f109331c41c1189180b0bcc887b67dce60be9c","abstract_canon_sha256":"9ef2100f68e2951fc8f517147c4f290c811723ede13ed6828a19f0768d0a4bf8"},"schema_version":"1.0"},"canonical_sha256":"221ffdb37794c42e0080f33826d750debfaaa64a0e6b36b284bd3ef2039e4867","source":{"kind":"arxiv","id":"2201.10512","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.10512","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"arxiv_version","alias_value":"2201.10512v1","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.10512","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_12","alias_value":"EIP73M3XSTCC","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_16","alias_value":"EIP73M3XSTCC4AEA","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_8","alias_value":"EIP73M3X","created_at":"2026-07-05T03:59:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:EIP73M3XSTCC4AEA6M4CNV2Q32","target":"record","payload":{"canonical_record":{"source":{"id":"2201.10512","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-01-25T18:16:27Z","cross_cats_sorted":[],"title_canon_sha256":"25cadb6178a00125bfc80e5585f109331c41c1189180b0bcc887b67dce60be9c","abstract_canon_sha256":"9ef2100f68e2951fc8f517147c4f290c811723ede13ed6828a19f0768d0a4bf8"},"schema_version":"1.0"},"canonical_sha256":"221ffdb37794c42e0080f33826d750debfaaa64a0e6b36b284bd3ef2039e4867","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:59:27.414420Z","signature_b64":"1Cq+wufFTYL97B6MMm2ugJnKkAvfQ9H+Tg5SByHEq+R1Twcx9ioT3VDJTQyokhSiaoN+eK+IZDEXozjEXDsrDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"221ffdb37794c42e0080f33826d750debfaaa64a0e6b36b284bd3ef2039e4867","last_reissued_at":"2026-07-05T03:59:27.413940Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:59:27.413940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.10512","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":"2026-07-05T03:59:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FeifTTuWR4t8I+WVDPm9nm375KVbYJYFh+oTGB5wvhh7FO9r70rx+cZloTYV9v99yRvJ4zcoetI/tU39kilhAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T22:44:44.783118Z"},"content_sha256":"1913db1f3db12825d6afd9e3f3fd1055002b87fd05835e830a5ff0bf78bf2305","schema_version":"1.0","event_id":"sha256:1913db1f3db12825d6afd9e3f3fd1055002b87fd05835e830a5ff0bf78bf2305"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:EIP73M3XSTCC4AEA6M4CNV2Q32","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparing Different Approaches for Stellar Intensity Interferometry","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Adrian Zink, Andreas Zmija, Dmitry Malyshev, Gisela Anton, Joachim von Zanthier, Naomi Vogel, Sebastian Karl, Stefan Funk, Stefan Richter, Thilo Michel","submitted_at":"2022-01-25T18:16:27Z","abstract_excerpt":"Stellar intensity interferometers correlate photons within their coherence time and could overcome the baseline limitations of existing amplitude interferometers. Intensity interferometers do not rely on phase coherence of the optical elements and thus function without high grade optics and light combining delay lines. However, the coherence time of starlight observed with realistic optical filter bandwidths (> 0.1 nm) is usually much smaller than the time resolution of the detection system (> 10 ps), resulting in a greatly reduced correlation signal. Reaching high signal to noise in a reasona"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.10512","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/2201.10512/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":"2026-07-05T03:59:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jPFV3Ob+KJBNST9UfemLnKqhhEvslFqIt/7Ym19qlbwoTzMvaMkuh6iQax/OGTqHH57hOeHdYppcTSqNpU+wDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T22:44:44.783738Z"},"content_sha256":"b8b8487f08da1ae390b3ea45606c614e2d73fe18443cf3b60514d1fdb30350cf","schema_version":"1.0","event_id":"sha256:b8b8487f08da1ae390b3ea45606c614e2d73fe18443cf3b60514d1fdb30350cf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/bundle.json","state_url":"https://pith.science/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/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":"2026-08-10T22:44:44Z","links":{"resolver":"https://pith.science/pith/EIP73M3XSTCC4AEA6M4CNV2Q32","bundle":"https://pith.science/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/bundle.json","state":"https://pith.science/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EIP73M3XSTCC4AEA6M4CNV2Q32/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:EIP73M3XSTCC4AEA6M4CNV2Q32","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":"9ef2100f68e2951fc8f517147c4f290c811723ede13ed6828a19f0768d0a4bf8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-01-25T18:16:27Z","title_canon_sha256":"25cadb6178a00125bfc80e5585f109331c41c1189180b0bcc887b67dce60be9c"},"schema_version":"1.0","source":{"id":"2201.10512","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.10512","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"arxiv_version","alias_value":"2201.10512v1","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.10512","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_12","alias_value":"EIP73M3XSTCC","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_16","alias_value":"EIP73M3XSTCC4AEA","created_at":"2026-07-05T03:59:27Z"},{"alias_kind":"pith_short_8","alias_value":"EIP73M3X","created_at":"2026-07-05T03:59:27Z"}],"graph_snapshots":[{"event_id":"sha256:b8b8487f08da1ae390b3ea45606c614e2d73fe18443cf3b60514d1fdb30350cf","target":"graph","created_at":"2026-07-05T03:59:27Z","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/2201.10512/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Stellar intensity interferometers correlate photons within their coherence time and could overcome the baseline limitations of existing amplitude interferometers. Intensity interferometers do not rely on phase coherence of the optical elements and thus function without high grade optics and light combining delay lines. However, the coherence time of starlight observed with realistic optical filter bandwidths (> 0.1 nm) is usually much smaller than the time resolution of the detection system (> 10 ps), resulting in a greatly reduced correlation signal. Reaching high signal to noise in a reasona","authors_text":"Adrian Zink, Andreas Zmija, Dmitry Malyshev, Gisela Anton, Joachim von Zanthier, Naomi Vogel, Sebastian Karl, Stefan Funk, Stefan Richter, Thilo Michel","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-01-25T18:16:27Z","title":"Comparing Different Approaches for Stellar Intensity Interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.10512","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":"sha256:1913db1f3db12825d6afd9e3f3fd1055002b87fd05835e830a5ff0bf78bf2305","target":"record","created_at":"2026-07-05T03:59:27Z","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":"9ef2100f68e2951fc8f517147c4f290c811723ede13ed6828a19f0768d0a4bf8","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-01-25T18:16:27Z","title_canon_sha256":"25cadb6178a00125bfc80e5585f109331c41c1189180b0bcc887b67dce60be9c"},"schema_version":"1.0","source":{"id":"2201.10512","kind":"arxiv","version":1}},"canonical_sha256":"221ffdb37794c42e0080f33826d750debfaaa64a0e6b36b284bd3ef2039e4867","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"221ffdb37794c42e0080f33826d750debfaaa64a0e6b36b284bd3ef2039e4867","first_computed_at":"2026-07-05T03:59:27.413940Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:59:27.413940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1Cq+wufFTYL97B6MMm2ugJnKkAvfQ9H+Tg5SByHEq+R1Twcx9ioT3VDJTQyokhSiaoN+eK+IZDEXozjEXDsrDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:59:27.414420Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.10512","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1913db1f3db12825d6afd9e3f3fd1055002b87fd05835e830a5ff0bf78bf2305","sha256:b8b8487f08da1ae390b3ea45606c614e2d73fe18443cf3b60514d1fdb30350cf"],"state_sha256":"ebd8e08a62f3926b1549f0c3b3a46a8923c29b32ebdd4dbed0b5e8f2b0749699"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9pvuq7KOzP5rStWRPsbWOh2HYvtAB0YlNTjd8U/o189lC88HW12FSqZojJqMgUqfc25TS5WlkmQYa9XiDbitCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T22:44:44.790059Z","bundle_sha256":"f8263b714701a5f5b256c892f374a1da20afe6ced8facba1624613f0db6a9394"}}