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Figure 1: Light curve of 1E 1145-6141 during the INTEGRAL observations. From top to bottom, the data of JEM-X (4-25 keV) and ISGRI (22-71 keV) (from http://isdc.unige.ch/?Data+sources) and the distance between the stars of the binary system expressed in light seconds as computed from the ephemeris measured by Ray & Chakrabarty (2002). The time intervals in which we performed the analysis are indicated in the figure between vertical solid lines and labeled with the corresponding name. |
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Figure 2: Long-term evolution of the pulse period of 1E 1145.1-6141. The diamonds after MJD 52 000 represent the results of our analysis. The crosses are the previous determinations, and the solid line is the spin-up trend derived by Ray & Chakrabarty (2002). |
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Figure 3: Background subtracted pulse profiles of 1E 1145.1-6141 for different periods in three energy bands. |
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Figure 4: Background subtracted pulse profiles of 1E 1145.1-6141 during H1. Below 20 keV the data are from JEM-X, above from ISGRI. In each panel, the solid line is the best fit pulse profile obtained adding a Gaussian to a constant; the vertical dashed line is the position of the Gaussian centroid. |
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Figure 5:
Broad band unfolded energy spectra for the high state H1 and the low state L1.
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Figure 6:
Best fit parameters of the absorbed bremsstrahlung model as
function of the source luminosity.
In the left panel we plot the plasma temperature and in the right panel
the ![]() |
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Figure 7:
Phase resolved spectral analysis results. Upper panel: the pulse profile during H1 in the 20-60 keV
energy range with the adopted phase intervals. Lower panel: the best fit parameters of the adopted model
(photo-electric absorbed bremsstrahlung) as a function of the pulse phase
during H1. From top to bottom we plot the hydrogen column density ![]() ![]() ![]() ![]() |
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