New two-colour light curves of Q0957+561: time delays and the origin of intrinsic variations
V. N. ShalyapinInstitute for Radiophysics and Electronics, National Academy of Sciences of Ukraine, 12 Proskura St., Kharkov 61085, Ukraine e-mail: [email protected]L. J. GoicoecheaDepartamento de Física Moderna, Universidad de Cantabria, Avda. de Los Castros s/n, 39005 Santander, Spain e-mail: [email protected]E. KoptelovaGraduate Institute of Astronomy, Jhongli City, Taoyuan County 320, Taiwan e-mail: [email protected]A. UllánRobotic Telescopes Group, Centro de Astrobiología (CSIC-INTA), associated to the NASA Astrobiology Institute, Ctra de Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain e-mail: [email protected]R. Gil-MerinoInstituto de Física de Cantabria (CSIC-UC), Avda. de Los Castros s/n, 39005 Santander, Spain e-mail: [email protected]
2008en
ABI
Аннотация
Aims. We extend the gr-band time coverage of the gravitationally lensed double quasar Q0957+561. New gr light curves permit us to detect significant intrinsic fluctuations, to determine new time delays, and thus to gain perspective on the mechanism of intrinsic variability in Q0957+561.
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