Changeset 6099 for trunk/MagicSoft/GRB-Proposal
- Timestamp:
- 01/28/05 18:08:52 (20 years ago)
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trunk/MagicSoft/GRB-Proposal/Strategies.tex
r6098 r6099 47 47 to implement a new feature into the Steering System wich 48 48 follow 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 61 50 62 51 \subsection{Calibration } 63 52 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 83 54 84 55 … … 89 60 If some significance is seen, observe the same position next night to get some OFF-data. 90 61 62
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