Karsten Berger On behalf of the MAGIC Collaboration

First source discovered in 1992 (Punch+), greatest surprise: Variability! Currently 49 sources! 14 discovered by MAGIC (6 since stereo) including the two most distant! In total 23 detections. Cluster of sources start to appear Guidance of  -ray catalogues from Fermi satellite In this talk: only last minute “fresh-from-the-oven” results © R. Wagner

Discovered by MAGIC in 2006 Re-observed 2007 and 2009 (mono observations with MAGIC-I) No new EBL constraints (improved models) but interesting results for blazar physics Detection on 16 th of January: 5.4  (trial corrected) Integral flux F(>150 GeV) = (3.8±0.8)· ph/(cm²s), power law index -3.1±1.0 Both compatible with 2006 mea- surements due to large statistical errors No detection in 2009 (upper limits) Aleksić+ 2011

MW light curves show no strict correlation with the VHE flare at any other wavelength Rotation of the polarization angle and new component (knot) emerging in the jet (Larionov+ 2008) Open questions: flare variability time scale? Delay to GeV range? No detection simultaneous to Fermi so far! One zone SSC+EC inside BLR cannot fit SED  Two zone model or lepto-hadronic models (more free parameters) Aleksić+ 2011

Uncertain redshift, most recent estimate: (Danforth+ 2010) Detection each year from 2005 – 2009: flux variability >150 GeV between 4% - 11% C.U. Mild linear correlation between optical (R-band) and VHE (probability 74%) Aleksić+ submitted

Steady power law, stable over the years Mean photon index: 4.27 ± 0.14 Averaged SED using historical data Narrow SSC component implies relatively large minimum Lorentz factor for e - : 2.5·10 3 (similar to other hard spectrum HBLs) Good agreement Fermi – MAGIC Stereo observations allow detections in shorter time scales (in prep.) Aleksić+ submitted

Included in stacked HBL sample, no detection with MAGIC –I (Aleksić+ 2010) Another successful optical trigger, detection consistent with previous MAGIC upper limit -> variability unclear Integral flux (E > 200 GeV): ≈ 2.3% C.U. Soft power law spectrum: −3.2 ± 0.5 stat ± 0.5 sys SED: narrow peaks similar to PG 1553 SSC model fit with parameters typical for HBLs Aleksić+ in prep.

HBL at z=0.138, candidate TeV blazar from the Costamante & Ghisellini list, MAGIC-I u.l. Discovered by VERITAS in : 1.8% C.U. (E>300 GeV), variability unclear, soft spectrum between GeV Enhanced optical activity starting October 2010 MAGIC observations: : no detection : flare! 5.6% C.U., ~6.7  in 3.3h (Atel #3192) Swift observations triggered: high X-ray state (ATel #3208) Detailed spectral and varia- bility analysis of full dataset (20h) underway Tuorla monitoring R-band Aleksić+ in prep.

Detected by Swift/BAT on 2011/03/28 at 12:57:45 UT GRB nature rapidly ruled out due to unusually long lasting flaring activity detected by Swift MAGIC started observations on 2011/03/31 at 02:22 UT (~2.5 days after the trigger) 12 nights observed E thr ~150GeV ~ 27 h of good quality data 27°< Zd < 47°

Neither full dataset nor data taken during high X-ray flux (> erg cm -2 s -1 ) shows a significant excess PRELIMINARY upper limits calculated Adapted from Burrows PRELIMINARY 2.4 x cm -2 s -1 above 100 GeV 4.5 x cm -2 s -1 above 158 GeV 2.4 x cm -2 s -1 above 250 GeV 1.1 x cm -2 s -1 above 400 GeV 3.8 x cm -2 s -1 above 630 GeV 2.3 x cm -2 s -1 above 1 TeV Integral Upper Limits (95% CL: Total sample) 2.8 x cm -2 s -1 above 100 GeV 5.2 x cm -2 s -1 above 158 GeV 2.8 x cm -2 s -1 above 250 GeV 1.1 x cm -2 s -1 above 400 GeV 3.0 x cm -2 s -1 above 630 GeV 1.7 x cm -2 s -1 above 1 TeV Integral ULs (95% CL: High X state)

Another BL Lac with unkown redshift Previous detection by VERITAS in 2009 Optical flare in 2011 Significant variability on yearly time scales!

Aleksić+ submitted

Aleksić+ in prep. Another BL Lac with unknown redshift Previous detection by VERITAS in 2009 Optical flare in 2011 Significant variability on yearly time scales! Power law spectral index stable in different flux states SED modeling together with Fermi data is in progress

HBL, z=0.083 Host galaxy one of the most luminous and largest of all BL Lacs Triplet of interacting galaxies with tidel streams? (Heidt+ 1999) Promising candidate from Costamante & Ghisellini list 60h of data, clear 5  signal ~0.8% C.U., hard spectrum Weakest AGN detected by MAGIC so far, start to explore <1% Crab regime Analysis still ongoing PRELIMINARY

M87 low state emission between ID1093 Stereoscopic Observations of the Blazar 3C 66A ID0884 Multi-Wavelength Observations of the HBL Object 1ES in Spring 2008 ID1273 Many more oral contributions, all include results not presented in this talk!

MAGIC stereoscopic system is performing very well: 7 new sources Optical triggers enabled many of these discoveries Most of the sources are variable Multi-wavelength studies important Actively constraining blazar emission models Planned upgrades to improve sensitivity (especially at low energies)

Located at La Palma 2200m a.s.l. Science observations with both telescopes started Fall 2009 Lowest threshold of all IACTs: ~60 GeV at zenith Sensitivity ~0.76% Crab above 250 GeV in 50h Angular resolution better than ~0.07° Energy resolution ~15% Field of view: ~3.5° Further details: ID performance poster

Testing the emission models of blazar jets with the MAGIC telescopes ID0067 MAGIC and Multi-Wavelength Observations of Mrk 180 and 1ES in 2008 ID0832 Observation of the BL Lac objects 1ES and 1ES with the MAGIC telescopes ID1092 Observation of the Perseus galaxy cluster with the MAGIC telescopes ID1220 MAGIC detection of VHE emission from NGC 1275 Idxxxx Monitoring of bright, nearby Active Galactic Nuclei with the MAGIC telescopes ID1030 Multifrequency Variability and Correlations from Extensive Observing Campaigns of Mkn 421 and Mkn 501 in 2009

Aleksić+ in prep. July 16 th 2010 PRELIMINARY