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Detection of AGN with the MAGIC Telescope

Detection of AGN with the MAGIC Telescope. The VHE Sky VHE Blazar spectrum Observation prospects. Roger Firpo (IFAE) 14th International School of Cosmic Ray Astrophysics, Erice ‘04. The VHE Sky. 3rd EGRET catalog (20 MeV – 30 GeV) 271 sources 67 AGN (Blazars) 168 unidentified

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Detection of AGN with the MAGIC Telescope

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  1. Detection of AGN with the MAGIC Telescope • The VHE Sky • VHE Blazar spectrum • Observation prospects Roger Firpo (IFAE) 14th International School of Cosmic Ray Astrophysics, Erice ‘04

  2. The VHE Sky 3rd EGRET catalog (20 MeV – 30 GeV) • 271 sources • 67 AGN (Blazars) • 168 unidentified Cherenkov Telescopes (500 GeV – 10TeV) • 18 sources • 8 blazars, only 4 also in 3rd EGRET catalog MAGIC (30 GeV – 50 TeV) TeV Sky Roger Firpo, ISCRA 2004

  3. BL Lac Mrk421 The VHE Blazar spectrum The Spectral Energy Distribution (SED) Two bumps Synchrotron & IC Flaring (high flux) states • Sub-day scale variability In small E range: powerlaw spectrum dN/dE~k(E/Ec)-γ • γ = photon index 1.57 > γ > 3.45 EGRET IACTs Roger Firpo, ISCRA 2004

  4. Blazar observation prospects • Naively Extrapolating EGRET spectra • Powerlaw + IC peaks + EBL absorption • Observation time to have a 5σ detection < 50hr • Ethr= 30 GeV • Flux sensitivity down to 10-11 ph cm-2 s-1 3C 273 Z = 0.158 F(E>0.1) = 15.4·10-8  = 2.58 28 Blazars (9 BL Lacs + 19 FSRQs) are expected to be detected with a significance of 5σ in less than 50h Also we’ll use X-Ray satellite data to catch flaring AGN MAGIC Simple Power law EGRET Simple Power law + IRB MeV GeV TeV Roger Firpo, ISCRA 2004

  5. MAGIC AGN Candidates Roger Firpo, ISCRA 2004

  6. SUMMARY • The AGN are a primary target for MAGIC • We extrapolated EGRET data to predict the observation time for these sources • We expect to observe at least 28 AGN with MAGIC Roger Firpo, ISCRA 2004

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