{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:XPGASH46PUBY5JZA6NSNQW2IAP","short_pith_number":"pith:XPGASH46","schema_version":"1.0","canonical_sha256":"bbcc091f9e7d038ea720f364d85b4803d6b341f32bc8751a5a425ba0dbdd4034","source":{"kind":"arxiv","id":"1912.08977","version":1},"attestation_state":"computed","paper":{"title":"Gaia GraL: Gaia DR2 Gravitational Lens Systems. V. Doubly-imaged QSOs discovered from entropy and wavelets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"A.J. Drake, A. Krone-Martins, A. M. Nierenberg, C. Boehm, C. Ducourant, C. Spindola-Duarte, D. Dobie, D. Sluse, D. Stern, E. Slezak, F. Mignard, J.-F. LeCampion, J. Kl\\\"uter, J. Surdej, J. Wambsganss, L. Delchambre, L. Galluccio, M.J. Graham, O. Wertz, P. Jalan, R. Teixeira, S.G. Djorgovski, S. Scarano Jr., T. Murphy, U. Bastian","submitted_at":"2019-12-19T01:31:54Z","abstract_excerpt":"The discovery of multiply-imaged gravitationally lensed QSOs is fundamental to many astronomical and cosmological studies. However, these objects are rare and challenging to discover due to requirements of high-angular resolution astrometric, multiwavelength photometric and spectroscopic data. This has limited the number of known systems to a few hundred objects. We aim to reduce the constraints on angular resolution and discover multiply-imaged QSO candidates by using new candidate selection principles based on unresolved photometric time-series and ground-based images from public surveys. We"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1912.08977","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-12-19T01:31:54Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"b668de8b2be5d6ba8db389275d5f3206c71bcf15e4f878b71f8447f086382ec8","abstract_canon_sha256":"18a4e9cf9d1bd601c1ea81a6badaeaf30f779829ad1e1d0670930a144cfc2161"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:27:22.377032Z","signature_b64":"rxCi6vWKmsb3VrfTSSx8AqZAqcug9az0DeYz4TuOfhpa4uo/GvdqMeA/u0+EAy9Rwsy4Ou4Ign9fpKoSMFkuDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bbcc091f9e7d038ea720f364d85b4803d6b341f32bc8751a5a425ba0dbdd4034","last_reissued_at":"2026-07-05T00:27:22.376512Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:27:22.376512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gaia GraL: Gaia DR2 Gravitational Lens Systems. V. Doubly-imaged QSOs discovered from entropy and wavelets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"A.J. Drake, A. Krone-Martins, A. M. Nierenberg, C. Boehm, C. Ducourant, C. Spindola-Duarte, D. Dobie, D. Sluse, D. Stern, E. Slezak, F. Mignard, J.-F. LeCampion, J. Kl\\\"uter, J. Surdej, J. Wambsganss, L. Delchambre, L. Galluccio, M.J. Graham, O. Wertz, P. Jalan, R. Teixeira, S.G. Djorgovski, S. Scarano Jr., T. Murphy, U. Bastian","submitted_at":"2019-12-19T01:31:54Z","abstract_excerpt":"The discovery of multiply-imaged gravitationally lensed QSOs is fundamental to many astronomical and cosmological studies. However, these objects are rare and challenging to discover due to requirements of high-angular resolution astrometric, multiwavelength photometric and spectroscopic data. This has limited the number of known systems to a few hundred objects. We aim to reduce the constraints on angular resolution and discover multiply-imaged QSO candidates by using new candidate selection principles based on unresolved photometric time-series and ground-based images from public surveys. We"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.08977","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/1912.08977/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1912.08977","created_at":"2026-07-05T00:27:22.376594+00:00"},{"alias_kind":"arxiv_version","alias_value":"1912.08977v1","created_at":"2026-07-05T00:27:22.376594+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.08977","created_at":"2026-07-05T00:27:22.376594+00:00"},{"alias_kind":"pith_short_12","alias_value":"XPGASH46PUBY","created_at":"2026-07-05T00:27:22.376594+00:00"},{"alias_kind":"pith_short_16","alias_value":"XPGASH46PUBY5JZA","created_at":"2026-07-05T00:27:22.376594+00:00"},{"alias_kind":"pith_short_8","alias_value":"XPGASH46","created_at":"2026-07-05T00:27:22.376594+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.19217","citing_title":"Taking Inventory of the Most Promising Lensed Radio Sources for Constraining Fundamental Properties of Dark Matter","ref_index":162,"is_internal_anchor":false},{"citing_arxiv_id":"2512.11960","citing_title":"Cosmic Duets I. High-spatial resolution spectroscopy of dual and lensed AGN with MUSE-NFM","ref_index":44,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP","json":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP.json","graph_json":"https://pith.science/api/pith-number/XPGASH46PUBY5JZA6NSNQW2IAP/graph.json","events_json":"https://pith.science/api/pith-number/XPGASH46PUBY5JZA6NSNQW2IAP/events.json","paper":"https://pith.science/paper/XPGASH46"},"agent_actions":{"view_html":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP","download_json":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP.json","view_paper":"https://pith.science/paper/XPGASH46","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1912.08977&json=true","fetch_graph":"https://pith.science/api/pith-number/XPGASH46PUBY5JZA6NSNQW2IAP/graph.json","fetch_events":"https://pith.science/api/pith-number/XPGASH46PUBY5JZA6NSNQW2IAP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP/action/storage_attestation","attest_author":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP/action/author_attestation","sign_citation":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP/action/citation_signature","submit_replication":"https://pith.science/pith/XPGASH46PUBY5JZA6NSNQW2IAP/action/replication_record"}},"created_at":"2026-07-05T00:27:22.376594+00:00","updated_at":"2026-07-05T00:27:22.376594+00:00"}