{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:AX7WO2EXSR63A2SPSISL7XF3BL","short_pith_number":"pith:AX7WO2EX","schema_version":"1.0","canonical_sha256":"05ff676897947db06a4f9224bfdcbb0ac52dcc12fbd480ca42d3bf9c6929fc81","source":{"kind":"arxiv","id":"1302.0766","version":2},"attestation_state":"computed","paper":{"title":"Flux and color variations of the doubly imaged quasar UM673","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Elyiv, A. Hornstrup, C. C. Th\\\"one, C. Liebig, C. Snodgrass, D. Ricci, E. Kerins, F. Finet, F. Grundahl, F. Sch\\\"onebeck, F. Zimmer, G. Maier, G. Masi, G. Scarpetta, J. Skottfelt, J. Southworth, J. Surdej, J. Wambsganss, K. Alsubai, K. Harps{\\o}e, K. Sahu, L. Mancini, M. Burgdorf, M. Dominik, M. Glitrup, M. Hundertmark, M. Mathiasen, M. Penny, M. Zub, N. Kains, O. Wertz, P. Browne, P. Dodds, R. Schmidt, S. Calchi Novati, S. Dreizler, S. Hardis, S. Proft, S. Rahvar, S. Sch\\\"afer, T. Anguita, T. C. Hinse, T. Gerner, U. G. J{\\o}rgensen, V. Bozza","submitted_at":"2013-02-04T17:35:49Z","abstract_excerpt":"With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multi-epoch and multi-band photometric observations with the Danish 1.54m telescope at the La Silla Observatory.\n  The observations were carried out in the VRi spectral bands during four seasons (2008--2011). We reduced the data using the PSF (Point Spread Function) photometric technique as well as aperture photometry.\n  Our results show for the brightest lensed component some significant decrease in flux between the first t"},"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":"1302.0766","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-04T17:35:49Z","cross_cats_sorted":[],"title_canon_sha256":"cd0f4e752cadcdb81969250d02047287af7c0f77f9108b2056786315c6ee1ec4","abstract_canon_sha256":"f729d387f383054b9b8068b225b097c36260204e42055b1a1ac529e74a4d695a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:26:32.039370Z","signature_b64":"HM7gLaNBDreLx9zCbvbLYnkIYXLwv2R4SVcniO7tNACCTWB+8pDWqyNE5hqRM6m2D6jxW0H2682p5jsiiPBMCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05ff676897947db06a4f9224bfdcbb0ac52dcc12fbd480ca42d3bf9c6929fc81","last_reissued_at":"2026-05-18T03:26:32.038978Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:26:32.038978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Flux and color variations of the doubly imaged quasar UM673","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Elyiv, A. Hornstrup, C. C. Th\\\"one, C. Liebig, C. Snodgrass, D. Ricci, E. Kerins, F. Finet, F. Grundahl, F. Sch\\\"onebeck, F. Zimmer, G. Maier, G. Masi, G. Scarpetta, J. Skottfelt, J. Southworth, J. Surdej, J. Wambsganss, K. Alsubai, K. Harps{\\o}e, K. Sahu, L. Mancini, M. Burgdorf, M. Dominik, M. Glitrup, M. Hundertmark, M. Mathiasen, M. Penny, M. Zub, N. Kains, O. Wertz, P. Browne, P. Dodds, R. Schmidt, S. Calchi Novati, S. Dreizler, S. Hardis, S. Proft, S. Rahvar, S. Sch\\\"afer, T. Anguita, T. C. Hinse, T. Gerner, U. G. J{\\o}rgensen, V. Bozza","submitted_at":"2013-02-04T17:35:49Z","abstract_excerpt":"With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multi-epoch and multi-band photometric observations with the Danish 1.54m telescope at the La Silla Observatory.\n  The observations were carried out in the VRi spectral bands during four seasons (2008--2011). We reduced the data using the PSF (Point Spread Function) photometric technique as well as aperture photometry.\n  Our results show for the brightest lensed component some significant decrease in flux between the first t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.0766","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1302.0766","created_at":"2026-05-18T03:26:32.039040+00:00"},{"alias_kind":"arxiv_version","alias_value":"1302.0766v2","created_at":"2026-05-18T03:26:32.039040+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.0766","created_at":"2026-05-18T03:26:32.039040+00:00"},{"alias_kind":"pith_short_12","alias_value":"AX7WO2EXSR63","created_at":"2026-05-18T12:27:38.830355+00:00"},{"alias_kind":"pith_short_16","alias_value":"AX7WO2EXSR63A2SP","created_at":"2026-05-18T12:27:38.830355+00:00"},{"alias_kind":"pith_short_8","alias_value":"AX7WO2EX","created_at":"2026-05-18T12:27:38.830355+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL","json":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL.json","graph_json":"https://pith.science/api/pith-number/AX7WO2EXSR63A2SPSISL7XF3BL/graph.json","events_json":"https://pith.science/api/pith-number/AX7WO2EXSR63A2SPSISL7XF3BL/events.json","paper":"https://pith.science/paper/AX7WO2EX"},"agent_actions":{"view_html":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL","download_json":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL.json","view_paper":"https://pith.science/paper/AX7WO2EX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1302.0766&json=true","fetch_graph":"https://pith.science/api/pith-number/AX7WO2EXSR63A2SPSISL7XF3BL/graph.json","fetch_events":"https://pith.science/api/pith-number/AX7WO2EXSR63A2SPSISL7XF3BL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL/action/storage_attestation","attest_author":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL/action/author_attestation","sign_citation":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL/action/citation_signature","submit_replication":"https://pith.science/pith/AX7WO2EXSR63A2SPSISL7XF3BL/action/replication_record"}},"created_at":"2026-05-18T03:26:32.039040+00:00","updated_at":"2026-05-18T03:26:32.039040+00:00"}