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Expected counts spectra for different source photon spectra

In figures 3.20, 3.21 and 3.22 we report the expected LS1 counts spectra for the following source photon spectra respectively: a power-law with photon index = 1, a typical Band form spectrum (see section 4.1) with $\alpha$=-0.5,$\beta$=-2,E0=150 keV and a Crab-like spectrum ($\alpha$=-2.1, norm = 9.7 photons cm-2 s-1 keV-1) integrated over the GRBM spectra accumulation time of 128 s.

These simulations were performed with the XSPEC package using the FITS LS1 response matrix.


  
Figure 3.20: LS1 simulated counts spectra for a $\alpha$ = -1 power-law source photon spectrum
\begin{figure} \epsfig {file=plaw_sim.ps,width=12cm,angle=-90} \vspace{1cm}\end{figure}


  
Figure 3.21: LS1 simulated counts spectra for a typical Band form source photon spectrum
\begin{figure} \epsfig {file=band_sim.ps,width=12cm,angle=-90} \vspace{1cm}\end{figure}


  
Figure 3.22: LS1 simulated counts spectra for a Crab-like source photon spectrum
\begin{figure} \epsfig {file=crabsim.ps,width=12cm,angle=-90} \vspace{1cm}\end{figure}


Lorenzo Amati
8/30/1999