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Day-Scale Variability of 3C 279 and Searches for Correlations in Gamma-Ray, X-Ray, and Optical Bands | | R. C. Hartman
; M. Villata
; T. J. Balonek
; D. L. Bertsch
; H. Bock
; M. Boettcher
; M. T. Carini
; W. Collmar
; G. De Francesco
; E. C. Ferrara
; J. Heidt
; G. Kanbach
; S. Katajainen
; M. Koskimies
; O. M. Kurtanidze
; L. Lanteri
; A. Lawson
; Y. C. Lin
; A. P. Marscher
; J. P. McFarland
; I. M. McHardy
; H. R. Miller
; M. Nikolashvili
; K. Nilsson
; J. C. Noble
; G. Nucciarelli
; L. Ostorero
; T. Pursimo
; C. M. Raiteri
; R. Rekola
; T. Savolainen
; A. Sillanpaa
; A. Smale
; G. Sobrito
; L. O. Takalo
; D. J. Thompson
; G. Tosti
; S. J. Wagner
; J. W. Wilson
; | | Date: |
15 May 2001 | | Subject: | astro-ph | | Affiliation: | NASA/GSFC | | 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. | | Source: | arXiv, astro-ph/0105247 | | Services: | Forum | Review | PDF | Favorites | |
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