{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:JORZRIVP3AFJYIVHGSHOHNAOGX","short_pith_number":"pith:JORZRIVP","canonical_record":{"source":{"id":"2307.07473","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-07-14T16:54:41Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2c422814b87ca17db38293a6500e26df24b449f7fce5013df49dd3d231039ab1","abstract_canon_sha256":"6f7474a5328164f15dbe97aa111bcc1964a19ae67ea5f26309144b3f7bcc66c5"},"schema_version":"1.0"},"canonical_sha256":"4ba398a2afd80a9c22a7348ee3b40e35f7c4e1d40a6b98079fb247ae9d880915","source":{"kind":"arxiv","id":"2307.07473","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.07473","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"arxiv_version","alias_value":"2307.07473v1","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.07473","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_12","alias_value":"JORZRIVP3AFJ","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_16","alias_value":"JORZRIVP3AFJYIVH","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_8","alias_value":"JORZRIVP","created_at":"2026-07-05T06:30:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:JORZRIVP3AFJYIVHGSHOHNAOGX","target":"record","payload":{"canonical_record":{"source":{"id":"2307.07473","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-07-14T16:54:41Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2c422814b87ca17db38293a6500e26df24b449f7fce5013df49dd3d231039ab1","abstract_canon_sha256":"6f7474a5328164f15dbe97aa111bcc1964a19ae67ea5f26309144b3f7bcc66c5"},"schema_version":"1.0"},"canonical_sha256":"4ba398a2afd80a9c22a7348ee3b40e35f7c4e1d40a6b98079fb247ae9d880915","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:30:56.139444Z","signature_b64":"m7SudCTqg1Vr39qZjDRL6H4NaHR3PgsOR36c2OidhgJGQ3ihCF0iG7AnIBu9Dq/2cU9394GZeDjBxbW+qWfnCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ba398a2afd80a9c22a7348ee3b40e35f7c4e1d40a6b98079fb247ae9d880915","last_reissued_at":"2026-07-05T06:30:56.138953Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:30:56.138953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.07473","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":"2026-07-05T06:30:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O0ZF1wSUVzkEqfhx4K/iQHPZKomFCC6TMNFuBc4WVjql768yghEnhe0y1z0gW6jH2X8+JqgwX+nQ767+WIKDBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:29:01.367855Z"},"content_sha256":"f65a89a95074cb9a67d3bdd208d0f050816b8d3ccb00f76b3da90f092bc1f54e","schema_version":"1.0","event_id":"sha256:f65a89a95074cb9a67d3bdd208d0f050816b8d3ccb00f76b3da90f092bc1f54e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:JORZRIVP3AFJYIVHGSHOHNAOGX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraints on the Abundance of PBHs from X-ray Quasar Microlensing Observations: Substellar to Planetary Mass Range","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. Esteban-Guti\\'errez, E. Mediavilla, J. A. Mu\\~noz, J. Jim\\'enez-Vicente","submitted_at":"2023-07-14T16:54:41Z","abstract_excerpt":"We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of low mass black holes (from $\\sim$ $10^{-3}M_{\\odot}$ to $10^{-1}M_{\\odot}$) in lens galaxies. We compare these observations with microlensing magnification simulations of a mixed population of stars and black holes (BHs) plus a smooth matter component. We estimate the individual mass fractions of both, stars and BHs, for three different BH masses in the range of substellar to planetary masses. Our Bayesian analysis indicates that the cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.07473","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/2307.07473/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":"2026-07-05T06:30:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHD3BgPyIoGYBF51ycm0KEGQHZaWZNGURfdP8bofaFiR6KCjQd9AFWlvn+YL3r1d/omafQF6Wa8H3mYmQclbDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:29:01.368556Z"},"content_sha256":"93a91487a6ed1216c17ef95ad4ae110482f0c656545e5eb4d2d585148b485428","schema_version":"1.0","event_id":"sha256:93a91487a6ed1216c17ef95ad4ae110482f0c656545e5eb4d2d585148b485428"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/bundle.json","state_url":"https://pith.science/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/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":"2026-08-17T18:29:01Z","links":{"resolver":"https://pith.science/pith/JORZRIVP3AFJYIVHGSHOHNAOGX","bundle":"https://pith.science/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/bundle.json","state":"https://pith.science/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JORZRIVP3AFJYIVHGSHOHNAOGX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:JORZRIVP3AFJYIVHGSHOHNAOGX","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":"6f7474a5328164f15dbe97aa111bcc1964a19ae67ea5f26309144b3f7bcc66c5","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-07-14T16:54:41Z","title_canon_sha256":"2c422814b87ca17db38293a6500e26df24b449f7fce5013df49dd3d231039ab1"},"schema_version":"1.0","source":{"id":"2307.07473","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.07473","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"arxiv_version","alias_value":"2307.07473v1","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.07473","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_12","alias_value":"JORZRIVP3AFJ","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_16","alias_value":"JORZRIVP3AFJYIVH","created_at":"2026-07-05T06:30:56Z"},{"alias_kind":"pith_short_8","alias_value":"JORZRIVP","created_at":"2026-07-05T06:30:56Z"}],"graph_snapshots":[{"event_id":"sha256:93a91487a6ed1216c17ef95ad4ae110482f0c656545e5eb4d2d585148b485428","target":"graph","created_at":"2026-07-05T06:30:56Z","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/2307.07473/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of low mass black holes (from $\\sim$ $10^{-3}M_{\\odot}$ to $10^{-1}M_{\\odot}$) in lens galaxies. We compare these observations with microlensing magnification simulations of a mixed population of stars and black holes (BHs) plus a smooth matter component. We estimate the individual mass fractions of both, stars and BHs, for three different BH masses in the range of substellar to planetary masses. Our Bayesian analysis indicates that the cont","authors_text":"A. Esteban-Guti\\'errez, E. Mediavilla, J. A. Mu\\~noz, J. Jim\\'enez-Vicente","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-07-14T16:54:41Z","title":"Constraints on the Abundance of PBHs from X-ray Quasar Microlensing Observations: Substellar to Planetary Mass Range"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.07473","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:f65a89a95074cb9a67d3bdd208d0f050816b8d3ccb00f76b3da90f092bc1f54e","target":"record","created_at":"2026-07-05T06:30:56Z","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":"6f7474a5328164f15dbe97aa111bcc1964a19ae67ea5f26309144b3f7bcc66c5","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-07-14T16:54:41Z","title_canon_sha256":"2c422814b87ca17db38293a6500e26df24b449f7fce5013df49dd3d231039ab1"},"schema_version":"1.0","source":{"id":"2307.07473","kind":"arxiv","version":1}},"canonical_sha256":"4ba398a2afd80a9c22a7348ee3b40e35f7c4e1d40a6b98079fb247ae9d880915","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ba398a2afd80a9c22a7348ee3b40e35f7c4e1d40a6b98079fb247ae9d880915","first_computed_at":"2026-07-05T06:30:56.138953Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:30:56.138953Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m7SudCTqg1Vr39qZjDRL6H4NaHR3PgsOR36c2OidhgJGQ3ihCF0iG7AnIBu9Dq/2cU9394GZeDjBxbW+qWfnCA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:30:56.139444Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.07473","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f65a89a95074cb9a67d3bdd208d0f050816b8d3ccb00f76b3da90f092bc1f54e","sha256:93a91487a6ed1216c17ef95ad4ae110482f0c656545e5eb4d2d585148b485428"],"state_sha256":"3b424b29f9f33f21871b290c8bed8922ba37c4d400588e8b016ac97f4626e503"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X/omUyfdJLmo6VOtZkiPZ0FW0UDlSXsbhPA9SC5ViJyGGu6DqnCunihtYxaX8zwblFIznTf0fLBaXt4gf0ICDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T18:29:01.374722Z","bundle_sha256":"4105220570cf1b431a8986d7d90698f91f5b9223343e030d7acbe35cce09e035"}}