학술논문
Day-Scale Variability of 3C 279 and Searches for Correlations in Gamma-Ray, X-Ray, and Optical Bands
Document Type
Working Paper
Author
Hartman, R. C.; Villata, M.; Balonek, T. J.; Bertsch, D. L.; Bock, H.; Boettcher, M.; Carini, M. T.; Collmar, W.; De Francesco, G.; Ferrara, E. C.; Heidt, J.; Kanbach, G.; Katajainen, S.; Koskimies, M.; Kurtanidze, O. M.; Lanteri, L.; Lawson, A.; Lin, Y. C.; Marscher, A. P.; McFarland, J. P.; McHardy, I. M.; Miller, H. R.; Nikolashvili, M.; Nilsson, K.; Noble, J. C.; Nucciarelli, G.; Ostorero, L.; Pursimo, T.; Raiteri, C. M.; Rekola, R.; Savolainen, T.; Sillanpaa, A.; Smale, A.; Sobrito, G.; Takalo, L. O.; Thompson, D. J.; Tosti, G.; Wagner, S. J.; Wilson, J. W.
Source
Subject
Language
Abstract
Light curves of 3C 279 are presented in optical (R-band), X-rays (RXTE/PCA), and gamma rays (CGRO/EGRET) for 1999 Jan-Feb and 2000 Jan-Mar. During both of those epochs the gamma-ray levels were high, and all three observed bands demonstrated substantial variation, on time scales as short as one day. Correlation analyses provided no consistent pattern, although a rather significant optical/gamma-ray correlation was seen in 1999, with a gamma-ray lag of ~2.5 days, and there are other suggestions of correlations in the light curves. For comparison, correlation analysis is also presented for the gamma-ray and X-ray light curves during the large gamma ray flare in 1996 Feb and the two gamma-bright weeks leading up to it; the correlation at that time was strong, with a gamma-ray/X-ray offset of no more than 1 day.
Comment: 20 pages, including 7 figures; accepted by The Astrophysical Journal
Comment: 20 pages, including 7 figures; accepted by The Astrophysical Journal