VHE ray physics overview

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VHE ?-ray physics overview
47 sources above 100 GeV seen by HessMagic, only
4 before!
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The MAGIC ?-ray telescope
Barcelona IFAE, UA Barcelona, U. Barcelona, HU
Berlin, Instituto Astrofisica Canarias, U.C.
Davis, U. Dortmund, U. Lodz, UCM Madrid, MPI
München, INFN/ U. Padua, INFN/ U. Siena, INR
Sofia, Tuorla Observatory, Yerevan Phys.
Institute, INFN/ U. Udine, U. Würzburg, ETH Zürich

• Largest Cherenkov Telescope 17 m Ø mirror dish
• 3.5 FoV Camera with 576 enhanced QE PMTs
• Fast repositioning for GRBs average 30s
• Trigger threshold 50 GeV
• Analysis threshold 60 GeV
• Sensitivity 2.5 Crab / 50 h
• ?-PSF 0.1
• Energy resolution 20 - 30

PHYS DATA TAKING EFFICIENCY gt 90 with good
wheather moon (1100 moonless hrs/year 400
with moon)
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Science highlights from MAGIC since 2006

• 18 scientific papers published or in press
• 15 sources detected
• 5 new extragalactic sources discovered
• Including the prototype of a new family of
  objects LBL AGNs emit VHE gammas!
• MAGIC Coll., Discovery of VHE gamma emission
  from BL Lac, astro-ph/0703084, subm. to ApJ Lett
• 2 new galactic objects discovered
• Including the prototype of a new family of
  objects
• MAGIC Coll., VHE gamma emission from the mquasar
  LS I 61 303, Science 312 (06) 1771

4
Extragalactic VHE ?-ray sources
15 blazars 1 radio galaxy

• MAGIC observations
• Mrk 421 z0.030 astro-ph /0603478
• Mrk 501 z0.034 astro-ph 0702008
• 1ES2344514 z0.044 astro-ph /0612383
• Mrk 180 z0.045 ApJL 648 (2006) 105
• 1ES1959650 z0.047 ApJ 639 (2006) 761
• BL Lac z0.069 astro-ph/0703084
• 1ES1218308 z0.182 ApJL 642 (2006) 119
• PG1553113 zgt0.09 ApJL 654 (2007) 119
• 3 more in pipeline

redshift

• VHE ?-rays leptonic or hadronic origin?
• Fast flares can be used for tests on light
  propagation
• Gamma Ray Horizon
• ? cosmological parameters

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High time-resolution study of AGN flare

• Variability studies of Mkn 501 for the 1st
  time, IC peak detected
• Huge Mkn 501 flare 4 Crab intensity, signal
  more than doubled wrt baseline
• Intensity variation recorded in 2 minute bins gt
  new, much stronger, constraints on emission
  mechanism and light-speed dispersion relations
  (effective quantum gravity scale).
• O (Mp/100) reached

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Whats new 1 MAGIC2 Italy

• Mirror production _at_ full speed!
• Blank production started
• 4 mould produced
• 4 mirrors/day production rate
• for full production
• 20 blanks already produced
• Mirrors polishing tested
• 7 mirrors fully finshed _at_LT
• to test the full procedure
• 1 mirror/day
• production rate
• In summer the production will stop
• for lack of funds only 1/3 of mirrors (80)
• financed so far by INFN

3 new mirrors mounted in the MAGIC I frame for
test Performing well after gt 1 year
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Whats new 2 the CTA
Outer array (smaller telescopes)
Inner array (larger telescopes)

• aims to explore the sky in the 10 GeV to 100 TeV
  energy range
• builds on demonstrated technologies replicas of
  MAGIC, HESS in 2 sites (N/S)
• combines guaranteed science with significant
  discovery potential
• 1000 sources expected
• RD proposal now
• INFN leads
• Mirrors
• Site section Infrastructure
• If infrastructure financed in 2009, will take
  over MAGICHESS in 2012

Efficiency _at_ 5s in 50 hours
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Conclusions
Conclusions

• MAGIC is delivering very good physics results
• detected 15 sources
• discovered 4 new VHE ?-ray sources
• 18 scientific publications (printed or submitted)
• Cycle2 almost completed important commitment to
  test fundamental physics (DM, Lorentz violation,
  )
• A second telescope will see
• the first light soon (end 2007?)
• 2 x better sensitivity ?
• no. of sources may increase up to 50
• We need money for it

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Richieste

• Sblocco dei SJ (le missioni estere sono state
  particolarmente scarse questanno per
  risparmiare MAGIC Italia fa turni di 24 notti
  consecutive)
• 230 kEUR per lottica di MAGIC2 (1/3)
• 240 50 10 kEUR per elettronica/DAQ di MAGIC2
• Approvazione del nuovo MoU, nel quale MAGIC2 e
  esplicitamente incluso

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Futuro (fino al 2010)

• Importante interazione con i satelliti gamma
• Dal 2007 Run con AGILE
• Dal 2008 Run con GLAST
• E fondamentale il completamento di MAGIC2, che
  raddoppia lefficienza, migliora la precisione
  angolare e abbassa la soglia energetica. Temibile
  la concorrenza di VERITAS, come MAGIC
  allemisfero N, che e ora operativo con 3
  telescopi e entro lanno lo sara con 4
• Ci si attende di arrivare entro il 2010 a 30
  nuove sorgenti VHE
• Il numero di FTE, oggi 30, passera a 35
  (contatti con un nuovo gruppo che si presentera
  a giugno)