Automatic Informations

Similarly to the case of the fixed format automatic e-mail produced by the on-line quest (section ), the main characteristics of the burst candidate that are automatically yielded, once this is detected, are explained through an example reported below: in this case, the GRB970117, occurred at UT 14:46:50, has been considered. First of all, the Sun R.A. $\alpha_{\odot}$ and declination $\delta_{\odot}$ (hereafter, all celestial coordinates are referred to J2000.0 and are expressed in degrees) at the burst time are computed and transformed into their corresponding BeppoSAX local coordinates $\phi_{\odot}$ and $\theta_{\odot}$: these are reported within the first three lines. Then, two lines reporting the four $\alpha_i$ (``LSra'' in the table) and $\delta_i$ (``LSde'') ($i=1,\ldots,4$), respectively are given, expressing the pointing directions of the normal axes to the four GRBM units. Of course, these values do not significantly change during the entire observation.

[4]

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Sun R.A. and Dec.:  299.0   -20.8
Sun LS phi  :  16.2
Sun LS theta: -21.1

LSra: 100.0  275.5  280.0   95.5
LSde: -52.3  -37.6   52.3   37.6

lkGRB[1]         #LSs: 4        Good HRR: 6
Trigger Time (UTC):    53210.6          17 Jan 1997 14:46:50
Sun visib.: 0
Earth Phi:  32.4        Theta:  24.4
LS E-elev:   53.0   -26.4    -5.3    74.2
LS Ecos  : -0.487   0.769   0.487  -0.769
......onboard trigger delay: 0  (obs.: 6)
 
Nsig(trg):   55.5   28.6    7.9   12.3   46.9   27.5    7.6   10.2
Nsig(pfl):  160.3   73.4   16.6   21.9  121.5   65.2   12.2   16.7
Bkg lev. :    890   1215    902    854   1007   1100   1014   1129
ChiSq R. :  1.253  0.969  1.060  0.967  1.084  0.909  0.963  0.950
 
Peak fl. :   4781   2558    498    640   3856   2161    387    562
Error    :   81.0   70.7   48.0   48.5   76.7   66.1   49.2   53.2
 
Fluence  :  32272  16242   2566   3387  24107  12411   1776   2774
Error    :  264.1  245.1  149.8  154.7  257.9  228.3  155.3  173.0
 
Dur  (s) :    21.00    18.00    11.00    12.00
Abundance:       21       18       11       12
H. Ratio :    0.747    0.764    0.692    0.819
HR Ratio :    0.978    1.079    0.912    1.104    0.933    0.845
HR W-ave :    0.751  +/-  0.009
GRBM-AC angle (deg):   0.8
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Now we limit our attention to a few lines, the remaining being very similar or even identical to their analogous ones in the case of the fixed format e-mail described in section .