Observations of extragalactic sources with the MAGIC telescope

International School of Cosmic Ray Astrophysics

"Astrophysics at Ultra-high Energies"

Erice (Italy) 20-27 June 2006

Observations of extragalactic sources

with the MAGIC telescope

Manel ErrandoIFAE (Barcelona)

for the MAGIC collaboration

ISCRA, Erice 20-27 June 2006 M. Errando for the MAGIC collaboration

Summary

Observation strategy Results from observations

1ES 1959+650 1ES 1218+30.4 Mkn 501 PG 1553+113 Mkn 421

Future plans: MAGIC II Conclusions


Main observation programs Systematic observations of

candidate HBLs

Observation of low redshift FSRQs and LBLs

Target of opportunity and multiwavelength observations of AGN

Monitoring of bright TeV blazars

M87

Follow-up of Gamma Ray Bursts

PG 1553+113

1ES 2344+514

PKS 2155-304

2E 1415+255

1ES 1426+428

1ES 1011+496

0317+183

0323+022

0414+009

0806+524

1ES 0120+340

1722+119



candidate HBLs




M87


0430+053 (3C 120)

0736+017

1219+285 (W Com)

1253-055 (3C 279)

0851+202 (OJ 287)

0959+658

1721+343 (4C 34.47)



candidate HBLs




M87




candidate HBLs




M87


Mrk 501

Mrk 421

1ES 1959+650



candidate HBLs




M87




candidate HBLs




M87


See next talk byMarkus Garczarczyk


1ES 1959+650

Observed during 6 hr in Sept-Oct 2004.

Low X-ray and optical activity.

Albert et al., ApJ 639 (2006) 761

Consistent with HEGRA spectrum in similar activity state


1ES 1959+650 Hadronic models are

favored for this source: “Orphan” flare observed

by Whipple. Hint of neutrino signal

during flaring period reported by AMANDA.

Albert et al., ApJ 639 (2006) 761

Multiwavelength campaign with Suzaku

last May

Good quality data!Krawczynski et al. 2004


1ES 1218+30.4

First source discovery of MAGIC.

z = 0.182, one of the furthest objects detected at VHE.

Observed during 8.2 hr at low Zd.

No time variability.

Albert et al., ApJ 642 (2006) L119


Mkn 501 Two strong flares observed in July 2005. Complete analysis going to be published soon.


PG 1553+113

Flux level decreases by a factor of 2 between 2005 and 2006.

No correlation between different energy bands.

Redshift unknown.

Observed during 2005 and 2006.

Evidence of VHE γ-ray emission reported by H.E.S.S. collaboration (Aharonian et al. 2006).

Detected by MAGIC both in 2005 and 2006 with more than 6σ significance.


PG 1553+113

intrinsic spectrum

observed spectrum

EBLabsorption

dN/dEi = dN/dEobs x exp[τγγ(E,z)]

Measure spectrum

Assume EBL model

Limit hardness of intrinsic spectrum

Redshift upper limit

z < 0.78


Mkn 421 It is the closest and one

of the best studied TeV blazars.

It has been observed with MAGIC during 29 hr, including 1.5 hr of simultaneous observations with H.E.S.S.


Mkn 421dN/dEi = dN/dEobs x exp[τγγ(E,z)]

Measure spectrum

Assume EBL

Know redshift

Intrinsic spectrum

Z = 0.030Z = 0.030


Mkn 421


Mkn 421

Clear X-ray/γ-ray correlation

Evidence of SSC emission


Mkn 421

Clear X-ray/γ-ray correlation

Evidence of SSC emission


MAGIC II

Clone of MAGIC with some improvements: PMT camera with cluster

design, with possibility to update to HPDs.

Ultra-fast 2.5 GHz readout.

Structure has already been built in La Palma.

Start commissioning phase in summer 2007.


Conclusions MAGIC telescope completed its first

physics campaign.

The discovery of a new source has been reported, some more are on the publication queue.

Established VHE γ-ray emitters have been studied in detail.

MAGIC II is currently under construction and will be operative in 2007.

Observations of extragalactic sources with the MAGIC telescope

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