{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:KBCIPKFOVDYJ3TCDQKAJFADERL","short_pith_number":"pith:KBCIPKFO","canonical_record":{"source":{"id":"1805.06653","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-17T08:39:07Z","cross_cats_sorted":[],"title_canon_sha256":"24a20fb66785f9d39607598d98c0945188122cb3c60374b8906ce191e4a64808","abstract_canon_sha256":"c850e07f48896a666489af68423022ea04fcec6ba4f221b0f4249921a5a2e5dc"},"schema_version":"1.0"},"canonical_sha256":"504487a8aea8f09dcc4382809280648acf41d9fed3e969be9e17e4f2bcbf4b91","source":{"kind":"arxiv","id":"1805.06653","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.06653","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"arxiv_version","alias_value":"1805.06653v2","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.06653","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"pith_short_12","alias_value":"KBCIPKFOVDYJ","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KBCIPKFOVDYJ3TCD","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KBCIPKFO","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:KBCIPKFOVDYJ3TCDQKAJFADERL","target":"record","payload":{"canonical_record":{"source":{"id":"1805.06653","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-17T08:39:07Z","cross_cats_sorted":[],"title_canon_sha256":"24a20fb66785f9d39607598d98c0945188122cb3c60374b8906ce191e4a64808","abstract_canon_sha256":"c850e07f48896a666489af68423022ea04fcec6ba4f221b0f4249921a5a2e5dc"},"schema_version":"1.0"},"canonical_sha256":"504487a8aea8f09dcc4382809280648acf41d9fed3e969be9e17e4f2bcbf4b91","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:20.687709Z","signature_b64":"et1JYxenG5B8FwhhjdFhye6A1E6SQ/xJQzSH5DvO59bmOasGdPLCIIQ25+Ip3eh0HDimWCDlc1RZi8LN7dlSAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"504487a8aea8f09dcc4382809280648acf41d9fed3e969be9e17e4f2bcbf4b91","last_reissued_at":"2026-05-18T00:08:20.687160Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:20.687160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.06653","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":"2026-05-18T00:08:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hhbzYdSGSK1jQa80Z05c3Wrgd7+x72DGYRGcLbQDwr3VKB5HorklRJImLT7+RyeABNNsT/Fotk9/RX4W0jo/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:38:25.383166Z"},"content_sha256":"cd5c041c8e05cac3b4ebd04e7f1b064ec7a53f6892d0260f7d94c328a58d3a9a","schema_version":"1.0","event_id":"sha256:cd5c041c8e05cac3b4ebd04e7f1b064ec7a53f6892d0260f7d94c328a58d3a9a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:KBCIPKFOVDYJ3TCDQKAJFADERL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatial intensity interferometry on three bright stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"D. Vernet, F. Vakili, G. Labeyrie, J.-P. Rivet, M. Fouch\\'e, R. Kaiser, W. Guerin","submitted_at":"2018-05-17T08:39:07Z","abstract_excerpt":"The present articlereports on the first spatial intensity interferometry measurements on stars since the observations at Narrabri Observatory by Hanbury Brown et al. in the 1970's. Taking advantage of the progresses in recent years on photon-counting detectors and fast electronics, we were able to measure the zero-time delay intensity correlation $g^{(2)}(\\tau = 0, r)$ between the light collected by two 1-m optical telescopes separated by 15 m. Using two marginally resolved stars ($\\alpha$ Lyr and $\\beta$ Ori) with R magnitudes of 0.01 and 0.13 respectively, we demonstrate that 4-hour correlat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.06653","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":"2026-05-18T00:08:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2uikrbL/8qUPATfzvn9JeWLYkKaBnba7Nk/5T9lbgsC1MOJzkm1grYI7J+HCsy4ySDS1sNnP3zTARnSE5/jcAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:38:25.383529Z"},"content_sha256":"a9d7bdede2e88e66f1bcc2df6ba0dd7c861cad74414c70911be6f342fa103540","schema_version":"1.0","event_id":"sha256:a9d7bdede2e88e66f1bcc2df6ba0dd7c861cad74414c70911be6f342fa103540"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/bundle.json","state_url":"https://pith.science/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/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":"2026-06-09T00:38:25Z","links":{"resolver":"https://pith.science/pith/KBCIPKFOVDYJ3TCDQKAJFADERL","bundle":"https://pith.science/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/bundle.json","state":"https://pith.science/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KBCIPKFOVDYJ3TCDQKAJFADERL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KBCIPKFOVDYJ3TCDQKAJFADERL","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":"c850e07f48896a666489af68423022ea04fcec6ba4f221b0f4249921a5a2e5dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-17T08:39:07Z","title_canon_sha256":"24a20fb66785f9d39607598d98c0945188122cb3c60374b8906ce191e4a64808"},"schema_version":"1.0","source":{"id":"1805.06653","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.06653","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"arxiv_version","alias_value":"1805.06653v2","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.06653","created_at":"2026-05-18T00:08:20Z"},{"alias_kind":"pith_short_12","alias_value":"KBCIPKFOVDYJ","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KBCIPKFOVDYJ3TCD","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KBCIPKFO","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:a9d7bdede2e88e66f1bcc2df6ba0dd7c861cad74414c70911be6f342fa103540","target":"graph","created_at":"2026-05-18T00:08:20Z","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":"The present articlereports on the first spatial intensity interferometry measurements on stars since the observations at Narrabri Observatory by Hanbury Brown et al. in the 1970's. Taking advantage of the progresses in recent years on photon-counting detectors and fast electronics, we were able to measure the zero-time delay intensity correlation $g^{(2)}(\\tau = 0, r)$ between the light collected by two 1-m optical telescopes separated by 15 m. Using two marginally resolved stars ($\\alpha$ Lyr and $\\beta$ Ori) with R magnitudes of 0.01 and 0.13 respectively, we demonstrate that 4-hour correlat","authors_text":"D. Vernet, F. Vakili, G. Labeyrie, J.-P. Rivet, M. Fouch\\'e, R. Kaiser, W. Guerin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-17T08:39:07Z","title":"Spatial intensity interferometry on three bright stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.06653","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:cd5c041c8e05cac3b4ebd04e7f1b064ec7a53f6892d0260f7d94c328a58d3a9a","target":"record","created_at":"2026-05-18T00:08:20Z","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":"c850e07f48896a666489af68423022ea04fcec6ba4f221b0f4249921a5a2e5dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-17T08:39:07Z","title_canon_sha256":"24a20fb66785f9d39607598d98c0945188122cb3c60374b8906ce191e4a64808"},"schema_version":"1.0","source":{"id":"1805.06653","kind":"arxiv","version":2}},"canonical_sha256":"504487a8aea8f09dcc4382809280648acf41d9fed3e969be9e17e4f2bcbf4b91","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"504487a8aea8f09dcc4382809280648acf41d9fed3e969be9e17e4f2bcbf4b91","first_computed_at":"2026-05-18T00:08:20.687160Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:20.687160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"et1JYxenG5B8FwhhjdFhye6A1E6SQ/xJQzSH5DvO59bmOasGdPLCIIQ25+Ip3eh0HDimWCDlc1RZi8LN7dlSAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:20.687709Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.06653","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd5c041c8e05cac3b4ebd04e7f1b064ec7a53f6892d0260f7d94c328a58d3a9a","sha256:a9d7bdede2e88e66f1bcc2df6ba0dd7c861cad74414c70911be6f342fa103540"],"state_sha256":"9d3f2ce20a819689c04fba6d3dccfe2dff6240de1c55b3ae51b0f987817b8d28"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lOzXvCoUlJs1DfPAgcthjfLpRJ7AcBSJs5bw2AdFfDz5Ct8JVkaINEAv9nJUkORpBpnoZQnbn3fcfIWJgvQfAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T00:38:25.385567Z","bundle_sha256":"f5c5db4ab9b55be3e190df4d4eec4957fce7d28f4731af705092a4bb75637430"}}