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Figure 1: Bottom: historical light curve of Aql X-1 in the 2-12 keV energy band, obtained by RXTE (data averaged over 1-day intervals). Top: detailed profile of the March, 2003 outburst. Vertical lines indicate moments of the INTEGRAL observations. |
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Figure 2:
X-ray images of the Aql X-1 sky region, obtained with
ISGRI/IBIS in the 25-50 keV energy band (upper panel) and JEM-X
in the 3-10 keV energy band (bottom panel) in March-April 2003. Contours on the ISGRI/IBIS map are given at the signal-to-noise levels of
2, 2.5, 3.3, 4.5, 6.2,... 42 |
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Figure 3: The photon spectra of Aql X-1 observed with INTEGRAL on March 10 (the 1st set of observations) and on April 5 (the 5th set). The best fit thermal bremsstrahlung models are shown by solid lines. |
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Figure 4: Top: JEM-X light curves containing two X-ray bursts from Aql X-1. Time resolution is 1 s. The zero time on the horizontal axis corresponds to Apr. 5.00 2003 UT. Bottom: image reconstruction of the Aql X-1 field before the burst (1) and during the burst (2). |
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Figure 5: Average photon spectrum of X1901+03 measured with JEM-X and IBIS/ISGRI over the entire set of observations. Solid line shows the approximation by a power law with the high energy cutoff. |
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Figure 6: The pulse profile of X1901+03 in the 5-15 keV energy band. |
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Figure 7: Average photon spectra of XTE J1908+094, X1908+075 and 4U1907+097 obtained with the ISGRI instrument. Solid lines show the power law approximations. |
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