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Timestamp:
01/28/05 18:08:52 (20 years ago)
Author:
gaug
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  • trunk/MagicSoft/GRB-Proposal/Strategies.tex

    r6098 r6099  
    4747to implement a new feature into the Steering System wich
    4848follow a different path while selwing must be considered.
    49 \par
    50 There was a shift observing the Crab-Nebula with half-moon at La Palma in December 2004.
    51 The experience was that the nominal High-Voltages could be maintained and gave no
    52 currents higher than 2\,$\mu$A. This means that moon-periods can be used for GRB-observations
    53 without fundamental modifications except for full-moon periods. We want to stress that
    54 these periods increase the chances to catch GRBs by 80\%, even if full-moon observations are excluded
    55 \cite{NICOLA}.
    56 It is therefore mandatory that the shifters keep the camera in fully operational conditions with high-voltages
    57 already switched on from the beginning of a half-moon night until the end.
    58 \par
    59 Because the background is higher with moon-light, we want to decrease then the maximun zenith angle from
    60 $\theta^{max} = 70^\circ$ to $\theta^{max} = 65^\circ$.
     49
    6150
    6251\subsection{Calibration }
    6352
    64 For ordinary source observation, the calibration is currently performed in the following way:
    65 \begin{itemize}
    66 \item At the beginning of the source observation, a dedicated pedestal run following by a calibration run is
    67 taken.
    68 \item During the data runs, interlaced calibration events are taken with a rate of 50\,Hz.
    69 \end{itemize}
    70 
    71 We would like to continue taking the interlaced calibration events when a GRB
    72 alert is launched, but leave out the pedestal and calibration run in order not to loose valueable time.
    73 
    74 \subsection{Determine the maximum zenith angle}
    75 
    76 We determine the maximum zenith angle by requiring that the overwhelming majority of
    77 possible GRBs will yield an in principle observable spectrum.
    78 
    79 \begin{figure}
    80 \centering
    81 \includegraphics[width=0.99\linewidth]{f4.eps}
    82 \end{figure}
     53\ldots {\bf MARKUS gAUG} \ldots
    8354
    8455
     
    8960If some significance is seen, observe the same position next night to get some OFF-data.
    9061
     62
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