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Highlight results from the MAGIC telescopes

Highlight results from the MAGIC telescopes. Elisa Prandini * Padova University & INFN From neutrino to multimessenger astronomy : status and perspectives Marseilles 4 th April 2011. *Mail to: prandini@pd.infn.it. Outline. MAGIC: a low energy threshold IACT Recent results Galactic

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Highlight results from the MAGIC telescopes

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  1. Highlight results from the MAGIC telescopes Elisa Prandini* Padova University & INFN From neutrino to multimessenger astronomy : status and perspectives Marseilles 4th April 2011 *Mail to: prandini@pd.infn.it

  2. Outline • MAGIC: a low energy threshold IACT • Recent results • Galactic • Extragalactic • Final remarks

  3. Main IACT Observatoriesin the world MAGIC VERITAS H.E.S.S.

  4. The TeV Sky MAGIC & VERITAS H.E.S.S. From: TeVCat http://tevcat.uchicago.edu/ • 46 extragalactic objects • 61 galactic objects

  5. The MAGIC Telescopes • Energy threshold ~50 GeV (~ 25 GeV with a special trigger) • FOV 3.5o • Energy Resolution ~16% (E>300 GeV) • Angular Resolution ~0.07o (E>300 GeV) • Sensitivity (5 s in 50 hours) ~0.8% Crab Nebula flux (> 250 GeV) MAGIC II (2009) MAGIC I (2004)

  6. MAGIC: The Instrument ACQUISITION SYSTEM IPE IPE IPE NET CE STRUCTURE SIGNAL TRANSPORT CAMERA MIRRORS

  7. MAGIC Astrophysics Source detection and monitoring Cosmology and fundamental physics

  8. The stereo Improvement (2009) • The Sensitivity: a factor of two more sensitive above 250 GeV, up to factor 3 at 100 GeV required observation time for detection greatly reduced!

  9. Achievements… 6 new sources in 1 year! New discoveries ToO program MWL campaigns Optical triggers HE g-rays triggers Characterization of the SED Combined information … and open search fields • Dark matter emitters • GRBs • …

  10. MAGICSources pulsar Supernova Remnants X-ray binaries

  11. MAGICSources FSRQs pulsar Supernova Remnants blazars X-ray binaries radiogalaxies

  12. MAGICSources FSRQs pulsar GRBs Supernova Remnants Dwarf Galaxies blazars Galaxy Clusters X-ray binaries radiogalaxies Unidentified objects

  13. Latest Stereo Discoveries 1ES 1215+303 4C +21.35 MAGIC J2001+435 NGC 1275 IC 310 B3 2247+381 6 new extragalactic objects in12 months!

  14. Achievements… 6 new sources in 1 year! New discoveries ToO program MWL campaigns Optical triggers HE g-ray triggers Neutrino triggers Characterization of the SED Combined information … and open search fields • Dark matter emitters • GRBs • …

  15. Target of Opportunity Observations Discovery of new sources Study of eventual correlations Optical ToOs: very successful Fermi ToOs: promising Neutrino ToOs

  16. Target of Opportunity Observations Discovery of new sources Study of eventual correlations Optical ToOs: very successful Fermi ToOs: promising Neutrino ToOs Example - the discovery of S5 0716+714: MAGIC 13.1h S=5.8 σ ApJ 704 (2009) L129

  17. Achievements… 6 new sources in 1 year! New discoveries ToO program MWL campaigns Optical triggers HE g-ray triggers Neutino triggers Combined information Characterization of the SED … and open search fields • Dark matter emitters • GRBs • …

  18. Joint HESS-MAGIC-VERITAS campaign of M87 (Science 2009) The M87 radio-galaxy Jet Colours: 0.2 - 6 keV (Chandra) Contours: 8 GHz radio (VLA) VHE HST-1 Core Knot A Knot D Chandra knot HST-1 X-ray nucleus • Shared monitoring HESS, MAGIC VERITAS • Confirmation of day-scale variability at VHE • Evidence of central origin of the VHE emission (60 Rs to the BH) nucleus Radio Peak flux jet

  19. Achievements… 6 new sources in 1 year! New discoveries ToO program MWL campaigns Optical triggers HE g-ray triggers Neutino triggers Characterization of the SED Combined information … and open search fields • Dark matter emitters • GRBs • …

  20. Outline • MAGIC: a low energy threshold IACT • Recent results • Galactic • Extragalactic • Final remarks Criterion: Recent/incoming publications!

  21. Our standard candle: the Crab Nebula • 3.2 hours of Crab Nebula data • stereoscopic system • November 2009 Complete coverage! preliminary

  22. Our standard candle: the Crab Nebula • 3.2 hours of Crab Nebula data • stereoscopic system • November 2009 Low energy!

  23. Our standard candle: the Crab Nebula Low energy range  overlap with Fermi!

  24. VHE g-ray emission from Binary Systems LSI +61 303 • Discovered by MAGIC in 2006 • Correlation between X and VHEgemission • Suggests leptonic processes are at work. MAGIC Coll. ApJLett706 (2009) 27

  25. VHE g-ray emission from Binary Systems MAGIC Coll. ApJ721 (2010) 843 LSI +61 303 • Discovered by MAGIC in 2006 • Correlation between X and VHEgemission • Suggests leptonic processes are at work. Cyg X-3 • Large MWL efforts! • MAGIC measured upper limits MAGIC Coll. ApJLett706 (2009) 27

  26. HESS J0632+057 January & February 2011: Discovered by H.E.S.S variable (non detection by VERITAS) Possible binary system (compatible with VHE and X-ray sources) • Increased X-ray activity (Swift-XRT Atel) from Jan 23th 2011 on till at least Feb 6th • ToO observations: • VERITAS (Atel #3153): 7&8 February Flux 4% Crab > 400 GeV • MAGIC (Atel #3161): 7-9 February Flux 3.4% Crab > 200 GeV Magic signal detection

  27. Pulsar Observations: the Crab Nebula • MAGIC is the only Cherenkov telescope that has detected a pulsar: • Special low-energy “Sum-Trigger” system • Lower threshold (but higher systematics) Pulsars: Energy cutoffs at few GeV ➙ very difficult for IACTs Crab Nebula pulsar phaseogram (Oct 2007 – Jan 2009) Determinant to constrain model: discards production mechanisms close to the pulsar surface, where the B-field is too high Clear signal

  28. Long term study of Bright ExtragalacticSources Mkn 421, Mkn 501, 1ES 1959+650, 1ES 2344+514, PG1553+113 Strategies: MWL campaigns, ToOs

  29. Jan 20th – April 30th 2009 SED Long term study of Bright ExtragalacticSources Mkn 421, Mkn 501, 1ES 1959+650, 1ES 2344+514, PG1553+113 Strategies: MWL campaigns, ToOs Correlation with X-ray preliminary

  30. Mkn 421 Mwl view Both peaks are resolved! FERMI MAGIC

  31. A Recent Discovery: IC 310 (Mono & Stereo) Fermi (10-100 GeV) • Head tail radio galaxy • Observation triggered by Fermi (hard spectra) • Complex FoV • Variable emission (since 2008) • Inner jet emission location favored E > 400 GeV MAGIC Coll.,ApJLett. 723 (2010) L207-212

  32. A Recent Discovery: IC 310 (Mono & Stereo) Fermi (10-100 GeV) • Head tail radio galaxy • Observation triggered by Fermi (hard spectra) • Complex FoV • Variable emission (since 2008) • Inner jet emission location favored E > 400 GeV MAGIC discovery (E<400 GeV)!! ATel October 2010 MAGIC Coll.,ApJLett. 723 (2010) L207-212

  33. VHE photons absorption by the Extragalactic Background Light x x x VHE photon + diffuse light  electron-positron pair production VHEEBLe+e- Absorption: dF/dEobs= (dF/dEem) e-t Dominguez et al. (2011)

  34. g-gopacity Absorption: dF/dEobs= (dF/dEem) e-t EBL Model Dominguez et al. (2011) The Energy Threshold plays a key role!

  35. 3C 279 (Jan-Apr 2006) - The farthest TeV object (z=0.54) - Modeling of 3C 279 non-trivial MAGIC: E>100 GeV 6.2σ 2.2σ Index 4.1+-0.68 MAGIC Coll., Science 320 (2008) 1752

  36. MAGIC Coll., accepted to A&A 3C 279 (Follow-up Observations) • 16th of January 2007: another flare detected (during a high optical state!) Optical state (KVA) Confirms 2006 signal and short timescale variations MAGIC: E>150 GeV

  37. PKS 1222+21:MAGIC Discovery! • The second most distant TeV emitter (z ~ 0.432) • FSRQ • One night of detection: • 17th June 2010 • Rapid variations! • No cut-off observed: • Emitting region constrained to lie outside the BLR MAGIC Coll., ApJ Letters 2011, 730 L8

  38. PKS 1222+21:MAGIC Discovery! • The second most distant TeV emitter (z ~ 0.432) • FSRQ • One night of detection: • 17th June 2010 • Rapid variations! • No cut-off observed: • Emitting region contrained to lie outside the BLR Challenge for blazar emission models

  39. Dark Matter Search with MAGIC g-rays from DM self-annihilation Dwarf Galaxies (High mass-to-light ratio) Galaxy clusters (~80% is DM) MAGIC ULs from good candidates: Segue I Willman I Draco Perseus (z = 0.018) Constraints on emission: from Cosmic Rays through Dark Matter annihilation from NGC 1275 (Now detected at VHE) MAGIC Coll, submitted to JCAP MAGIC Coll, ApJ 697,1299 (2009) Peresus Cluster MAGIC-1 only Nov-Dec 2008 MAGIC Coll, ApJ, 679, 428 (2008) MAGIC Coll, ApJ 710 (2010) 634

  40. Many new discoveries…1 year of A-Tels: • 25 February 2011: MAGIC observes a very high energy gamma-ray flare from 1ES 0806+524 • 11 February 2011: MAGIC confirms VHE gamma-ray emission from HESS J0632+057 between 7-9 Feb 2011 • 6 January 2011: Discovery of Very High Energy Gamma-Ray Emission from 1ES 1215+303 by MAGIC • 23 October 2010: No significant enhancement in the VHE gamma-ray flux of the Crab Nebula measured by MAGIC in September 2010 • 10 October 2010: Discovery of Very High Energy Gamma-Ray Emission from NGC 1275 by MAGIC • 7 October 2010: Discovery of Very High Energy Gamma-Ray Emission from B3 2247+381 by MAGIC • 22 July 2010: Discovery of Very High Energy gamma-ray emission from 1FGL J2001.1+4351 by MAGIC • 19 June 2010: MAGIC detects a VHE flare from 4C +21.35 (PKS 1222+21) • 9 April 2010: VERITAS and MAGIC Report Flaring in Very High Energy Gamma Rays from M 87 • 25 March 2010: MAGIC detects VHE gamma-ray emission from IC 310

  41. Conclusions Strong points of MAGIC Future plans Low energy threshold Overlapping with Fermi Deep universe New stereoscopic system Fast repositioning (sensitivity to transients: GRB) Moon observations MAGIC upgrade (improve low energy sensitivity): M1 Camera Trigger Readout electronics … many new discoveries!! Improved trigger acceptance and energy threshold Less noise

  42. Conclusions Strong points of MAGIC Future plans Low energy threshold Overlapping with Fermi Deep universe New stereoscopic system Fast repositioning (sensitivity to transients: GRB) Moon observations MAGIC upgrade (improve low energy sensitivity): M1 Camera Trigger Readout electronics … many new discoveries!! Improved trigger acceptance and energy threshold Less noise Thanks!

  43. Backup Slides

  44. The VHE g-ray sky: a new field

  45. Blazars SED: beaming effects • Collimation (sinq=1/g) • Time: Dtobs= Dtem/d • Energy: nobs = dnem • Luminosity: Lobs = dpLem • Rs < cDtvar / (1+z) Simplified SED nFn eVkeVMeVGeVTeV log(E) • = Doppler factor, ~10 • p ~ 4

  46. Detection technique

  47. MAGIC Camera • M1: 377 0.1o PMTs, 180 0.2o • M2: 1039 0.1o PMTs • QE ~ 30%

  48. MAGIC Trigger • Multi-level: • L0: threshold • L1: temporal and spatial coincidence (topology) • L2: topological constraints to the images (flag mode) • L3: stereo coincidence

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