{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7RS5E2XMCRXHA7U7LLBAS2BE52","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":"e599787ff99bf554c0c851681fccace981e865a7552876c4338cec89a9500c23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-21T23:39:22Z","title_canon_sha256":"2a5462c850824918edaef625cdc8c32492773420f1f0ec4f6915e2adce3b0e46"},"schema_version":"1.0","source":{"id":"1901.07120","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07120","created_at":"2026-05-17T23:48:04Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07120v2","created_at":"2026-05-17T23:48:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07120","created_at":"2026-05-17T23:48:04Z"},{"alias_kind":"pith_short_12","alias_value":"7RS5E2XMCRXH","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7RS5E2XMCRXHA7U7","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7RS5E2XM","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:44e0d27a2b9c728644f22248f6341243a7056885999164bab451155d10d4b105","target":"graph","created_at":"2026-05-17T23:48:04Z","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":"We constrain the abundance of primordial black holes (PBH) using 2622 microlensing events obtained from 5-years observations of stars in the Galactic bulge by the Optical Gravitational Lensing Experiment (OGLE). The majority of microlensing events display a single or at least continuous population that has a peak around the light curve timescale $t_{\\rm E}\\simeq 20~{\\rm days}$ and a wide distribution over the range $t_{\\rm E}\\simeq [1, 300]~{\\rm days}$, while the data also indicates a second population of 6 ultrashort-timescale events in $t_{\\rm E}\\simeq [0.1,0.3]~{\\rm days}$, which are advoca","authors_text":"Hiroko Niikura, Masahiro Takada, Shogo Masaki, Shuichiro Yokoyama, Takahiro Sumi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-21T23:39:22Z","title":"Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07120","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":"sha256:3cd0bb81d1bf0c94cd8710e4d817dc20f67daef675fcddf9998caee154d4043b","target":"record","created_at":"2026-05-17T23:48:04Z","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":"e599787ff99bf554c0c851681fccace981e865a7552876c4338cec89a9500c23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-01-21T23:39:22Z","title_canon_sha256":"2a5462c850824918edaef625cdc8c32492773420f1f0ec4f6915e2adce3b0e46"},"schema_version":"1.0","source":{"id":"1901.07120","kind":"arxiv","version":2}},"canonical_sha256":"fc65d26aec146e707e9f5ac2096824eeb65ebee809d2e825fe43c2cffb0a0c13","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc65d26aec146e707e9f5ac2096824eeb65ebee809d2e825fe43c2cffb0a0c13","first_computed_at":"2026-05-17T23:48:04.616627Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:04.616627Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tVrbpVHma+yLuVvVlrPJuHNGI3F4SYqBkOeLoGw+B+ozAkYEsJZ5c9d+Y9nnhedb7gqUNacuZguiCAzLPNo1Aw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:04.617000Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07120","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cd0bb81d1bf0c94cd8710e4d817dc20f67daef675fcddf9998caee154d4043b","sha256:44e0d27a2b9c728644f22248f6341243a7056885999164bab451155d10d4b105"],"state_sha256":"a8dc7a7854cbd3897feb616ea5ab23823f84f97cf8723592a714eaa3a5cb6669"}