{"paper":{"title":"Around the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar II: Results for the second observing season","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(10) Kharkov Nat. Univ., (12) Seoul Nat. Univ., (13) Dept de Fisica Moderna, 14), (14) DACOM Corp. Internet Tech. Div. (15) Univ. College London (16) Dept. de Astro., 15), 16, 17), (17) Carnegie Inst. of Washington, 18), (18) Obs. du mont Megantic, (19) Kyungpook Nat. Univ., (20) Danish Lib. for Natural, (2) Harvard-Smithsonian Ctr. for Astroph., (3) Instituto de Astrofisica de Canarias, (4) Akdeniz Univ. Phys. Dept., 5), (5) Tubitak Nat. Obs., (6) Kazan State Univ., (7) Insituto Nacional de Astrofisica Optica y Electronica, (8) Dept. de Phys., (9) Inst. for Astronomy, Alan Stockton (9), Alexander Oscoz (3), & Alexander Zheleznyak (10) ((1) Astro. Dept., Anna Kathinka (11), Anthony F.J. Moffatt (8, Astronomical Obs. (11) Univ. of Oslo, Astro. Program, Aurora M. Ullan (13), Cristina Abajas (3), Dalland Evans (11), David Alcalde (3), Evencio Mediavilla (3), Hwa-Sung Woo (19), Hyun Ju Lee (12), Igor Sinelnikov (10), Ilfan Bikmaev (6), Inst. of Theoretical Astroph., Irek Khamitov (5), Jan Teuber (20), Jean-Philippe Cournoyer (8), Jonghwan Lee (12, Ki Won Lee (12, Kjetil Kjernsmo (11), Luis Chinarro (3), Luis J. Goicoechea (13), Medical Sciences), Myeong-Gu Park (19), Myung Gyoon Lee (12), Nail Sakhibullin (6), Norman Purves (9), Omar Lopez-Cruz (7, Orhan Golbasi (5), Raul Mujica (7), Richard Crowe (9), Rolf Stabell (11), Roy Thompson (9), Rudolph E. Schild (2), Univ. de Cantabria, Univ. de Gunanajuato, Univ. Montreal, Univ. of Hawaii, U.Va, Vahram Chavushyan (7), Vladimir Dudinov (10), Wesley N. Colley (1), Young-Beom Jeon (12), Zeki Aslan (4","submitted_at":"2002-10-17T17:58:44Z","abstract_excerpt":"We report on an observing campaign in March 2001 to monitor the brightness of the later arriving Q0957+561 B image in order to compare with the previously published brightness observations of the (first arriving) A image. The 12 participating observatories provided 3543 image frames which we have analyzed for brightness fluctuations. From our classical methods for time delay determination, we find a 417.09 +/- 0.07 day time delay which should be free of effects due to incomplete sampling. During the campaign period, the quasar brightness was relatively constant and only small fluctuations were"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0210400","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/astro-ph/0210400/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"}