Changeset 6765
- Timestamp:
- 03/07/05 15:21:41 (20 years ago)
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trunk/MagicSoft/GC-Proposal/GC.tex
r6764 r6765 58 58 like Kaluza-Klein dark matter are not ruled out. Moreover, assuming a 59 59 universal DM density profile, the GC is expected to yield the largest DM flux 60 amongst the favo ured candidates, due to its proximity.60 amongst the favored candidates, due to its proximity. 61 61 62 62 At La Palma, the GC culminates at about 58 deg zenith angle (ZA). It can be … … 143 143 3 EG J1745-2852 \cite{GC_egret}, which has a broken power law spectrum 144 144 extending up to at least 10 GeV, with the index 1.3 below the break at a few 145 GeV. Ass suming a distance of 8.5 kpc, the gamma ray luminosity of this source145 GeV. Assuming a distance of 8.5 kpc, the gamma ray luminosity of this source 146 146 is very large $~2.2 \cdot 10^{37} \mathrm{erg}/\mathrm{s}$, which is 147 147 equivalent to about 10 Crab pulsars. An independent analysis of the EGRET data … … 215 215 \end{itemize} 216 216 217 It is quite possible that some of these potenti oal gamma-ray production sites contribute comparably to the the observed TeV flux.217 It is quite possible that some of these potential gamma-ray production sites contribute comparably to the the observed TeV flux. 218 218 219 219 … … 235 235 \includegraphics[totalheight=8cm]{total_spectrum.eps} 236 236 \end{center} 237 \caption[Total spectrum of the GC.]{Total spectrum of the gamma radiation from the Galactic Cent rum, compiled by \cite{Aharonian2005}.} \label{fig:GC_source_location}237 \caption[Total spectrum of the GC.]{Total spectrum of the gamma radiation from the Galactic Center, compiled by \cite{Aharonian2005}.} \label{fig:GC_source_location} 238 238 \end{figure} 239 239 240 240 241 241 242 \subsection{Emission from Sgr A$^*$}242 \subsection{Emission from Sgr A$^*$} 243 243 244 244 … … 272 272 Using fits of these dark matter profiles to the rotation data of the milky way predictions for the density distribution of the dark matter can be made \cite{Fornego2004,Evans2004}. Assuming parameters for the SUSY models determine the neutralino mass, the thermally averaged annihilation cross section and the gamma yield. Combining both models about the dark matter distribution and SUSY predictions for the gamma flux from SUSY particle dark matter annihilation are derived. 273 273 274 Figure \ref{fig:exclusion_lmits} shows exclusion limits taking the sensitivity of MAGIC from MC simulations into account for different sources and predictions from typical allowed SUSY model ls in the plane $N_{\gamma}(E_{\gamma}>E_{\mathrm{thresh}})\langle \sigma v \rangle$ vs$m_{\chi}$. Due to its relative vicinity the Galactic Center yield the largest expected flux from particle dark matter annihilation. Nevertheless this flux is more than one order of magnitude below the current MAGIC sensitivity. Also the observed flux from the HESS experiment way above the theoretical expectation.274 Figure \ref{fig:exclusion_lmits} shows exclusion limits taking the sensitivity of MAGIC from MC simulations into account for different sources and predictions from typical allowed SUSY models in the plane $N_{\gamma}(E_{\gamma}>E_{\mathrm{thresh}})\langle \sigma v \rangle$ vs. $m_{\chi}$. Due to its relative vicinity the Galactic Center yield the largest expected flux from particle dark matter annihilation. Nevertheless this flux is more than one order of magnitude below the current MAGIC sensitivity. Also the observed flux from the HESS experiment way above the theoretical expectation. 275 275 276 276 … … 300 300 \begin{tabular}{l|l|l|l} 301 301 \hline 302 Date & Time & Az $[^\circ]$ & Z d$[^\circ]$\\ \hline302 Date & Time & Az $[^\circ]$ & ZA $[^\circ]$\\ \hline 303 303 09/08/2004 & 21:00 - 22:00 & 198.3 - 214.7 & 60.3 - 67.8 304 304 \\ 09/09/2004 & 21:17 - 22:12 & 203.4 - 214.7 & 62.2 - 67.7 … … 312 312 In our preliminary analysis we used the Random Forest method for the gamma 313 313 hadron separation. For this purpose high 314 ZA (65$^\circ$ Z dand 205$^\circ$ Az) Monte Carlo gammas were generated,314 ZA (65$^\circ$ ZA and 205$^\circ$ Az) Monte Carlo gammas were generated, 315 315 99500 events in all, with energies between 200 316 316 and 30,000 GeV. The slope of the generated spectrum is $-2.6$, conforming the … … 319 319 The MC sample is divided into training 320 320 and test sample. Since there is no dedicated OFF data available, we used a 321 subsample of Sgr A$^*$ ON data for the Random Forest training. As training s321 subsample of Sgr A$^*$ ON data for the Random Forest training. As training 322 322 parameters we used SIZE, DIST, WIDTH, LENGTH, CONC, and M3Long... 323 323 … … 443 443 \section{Acknowledgements} 444 444 445 The authors thank A. Moralejo for helpful ldiscussions about the Monte Carlo simulations.445 The authors thank A. Moralejo for helpful discussions about the Monte Carlo simulations. 446 446 447 447
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