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Paper: ASCA Observations of BL Lacertae in 1997 Outburst
Volume: 159, BL Lac Phenomenon
Page: 176
Authors: Makino, F.; Tanihata, C.; Takahashi, T.; Kataoka, J.; Kubo, H.; Kawai, N.; Mattox, J. R.
Abstract: X-rays from BL Lacertae were observed by X-ray astronomy satellite ASCA during 18.6-19.6, July, 1997. The X-ray flux was about four times higher than that observed in 1988 with Ginga and showed variation of factor 2 during the observation. The spectra were of power law type which indices changed in the range of 1.24-1.60. The amplitude of variation in 0.7-1.5 keV was larger than that in 3-7 keV. The spectra can be expressed by superposition of two independently variable power law type spectra which could be attributed to synchrotron and inverse-Compton component respectively. Multifrequency spectrum will also discussed.
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