Detection of AGN with Detection of AGN with the MAGIC Telescopethe MAGIC Telescope

Roger Firpo (IFAE)Roger Firpo (IFAE)14th International School of Cosmic Ray Astrophysics, Erice ‘0414th International School of Cosmic Ray Astrophysics, Erice ‘04

• The VHE SkyThe VHE Sky• VHE Blazar spectrumVHE Blazar spectrum• Observation prospectsObservation prospects

The VHE SkyThe VHE Sky3rd EGRET catalog 3rd EGRET catalog (20 MeV – 30 GeV)(20 MeV – 30 GeV)

271 sources 271 sources 67 AGN (Blazars) 67 AGN (Blazars)

• 168 unidentified168 unidentified

ChCherenkov Telescopeserenkov Telescopes(500 GeV – 10TeV)(500 GeV – 10TeV)

18 sources18 sources 8 blazars, o8 blazars, only 4 also in nly 4 also in

3rd EGRET catalog3rd EGRET catalogTeV Sky

MAGIC (30 GeV – 50 TeV)MAGIC (30 GeV – 50 TeV)

Roger Firpo, ISCRA 2004

The VHE Blazar spectrumThe VHE Blazar spectrum

The Spectral Energy The Spectral Energy Distribution (SED)Distribution (SED)Two bumps Two bumps

Synchrotron & ICSynchrotron & IC

Flaring (high flux) Flaring (high flux) statesstates• Sub-day scale Sub-day scale

variabilityvariability

In small E range: In small E range: powerlaw spectrumpowerlaw spectrumdN/dE~k(E/Ec)-γ

• γ = photon index 1.57 > γ > 3.45

BL Lac Mrk421

EGRET

IACTs

Roger Firpo, ISCRA 2004

Blazar observation Blazar observation prospectsprospects

Naively Extrapolating EGRET spectraNaively Extrapolating EGRET spectra Powerlaw + IC peaks + EBL absorptionPowerlaw + IC peaks + EBL absorption Observation time to have a 5Observation time to have a 5σσ detection < detection <

50hr50hr EEthrthr= 30 GeV= 30 GeV Flux sensitivity down to 10Flux sensitivity down to 10-11-11 ph cm ph cm-2-2 s s-1-1

28 Blazars (9 BL 28 Blazars (9 BL Lacs + 19 FSRQs) Lacs + 19 FSRQs) are expected to be are expected to be detected with a detected with a significance of 5significance of 5σσ in in less than 50hless than 50h

Also we’ll Also we’ll use X-Ray use X-Ray satellite data to satellite data to catch flaring AGNcatch flaring AGN

EGRET

MAGIC

Simple Power law

Simple Power law + IRB

3C 273Z = 0.158

F(E>0.1) = 15.4·10-8

= 2.58

Roger Firpo, ISCRA 2004

MeV GeV TeV

MAGIC AGN CandidatesMAGIC AGN Candidates 

Source Name Z FP+IRB+5GeV(ph cm-2 s-1) TPL+IRB+5GeV (h)

Mrk 421 3EG_J1104+3809 0.031 8.55E-11 3.2OD+160 3EG_J0237+1635 0.94 6.41E-11 4.33C 279 3EG_J1255-0549 0.538 6.07E-11 4.6

W Comae 3EG_J1222+2841 0.102 6.03E-11 4.6CTA026 3EG_J0340-0201 0.852 1.67E-11 23.8

4C+29.45 3EG_J1200+2847 0.729 2.23E-11 27.5

Source Name ZFP+IRB (ph cm-2 s-1)

TPL+IRB (h)3C 66A 3EG_J0222+4253 0.444 3.43E-10 0.83c454.3 3EG_J2254+1601 0.859 2.53E-10 1.1OJ+287 3EG_J0853+1941 0.306 1.58E-10 1.8

4C+15.54 3EG_J1605+1553 0.357 1.55E-10 1.84C+38.41 3EG_J1635+3813 1.814 8.96E-11 3.1

  3EG_J1224+2118 0.435 6.95E-11 4.04C+15.05 3EG_J0204+1458 0.405 6.49E-11 4.3

  3EG_J2359+2041 1.066 5.70E-11 4.9  3EG_J0958+6533 0.368 4.80E-11 5.8  3EG_J0952+5501 0.901 4.16E-11 6.7

NRAO530 3EG_J1733-1313 0.902 2.48E-11 11.2  3EG_J0450+1105 1.207 2.54E-11 16.7  3EG_J1512-0849 0.361 1.56E-11 18.5  3EG_J0828+0508 0.18 1.96E-11 23.4

NRAO190 3EG_J0442-0033 0.844 1.65E-11 25.9PKS 2155-304 3EG_J2158-3023 0.116 9.33E-12 29.8

3C 273 3EG-J1229+0210 0.158 1.55E-11 33.3  3EG_J0530+1323 2.06 1.83E-11 34.3  3EG_J1614+3424 1.401 1.95E-11 34.8

CTA102 3EG_J2232+1147 1.037 1.74E-11 36.3  3EG_J0422-0102 0.915 1.19E-11 48.9

Roger Firpo, ISCRA 2004

SUMMARYSUMMARY

The AGN are a primary target for The AGN are a primary target for MAGICMAGIC

We extrapolated EGRET data to We extrapolated EGRET data to predict the observation time for these predict the observation time for these sources sources

We expect to observe at least 28 We expect to observe at least 28 AGN with MAGICAGN with MAGIC

Roger Firpo, ISCRA 2004