Scientific Highlights from AGN Observations with the MAGIC Telescope
|
|
- Raymond Shelton
- 6 years ago
- Views:
Transcription
1 Scientific Highlights from AGN Observations with the MAGIC Telescope Robert Marcus WAGNER Max-Planck-Institut für Physik, München on behalf of the MAGIC COLLABORATION
2 MAGIC Major Atmospheric Gamma-ray Imaging Cerenkov Telescope 17m diameter Imaging Air Cerenkov Telescope: currently largest single-dish instrument 3.5 diameter FOV photomultiplier camera with 576 enhanced-qe PMTs Trigger threshold: 50 GeV 60 GeV at zenith Sensitivity: 1.6% Crab Nebula in 50 hours above E=270 GeV (enhanced by timing information from new 2 GSample/s FADC) γ-psf is about 0.1 Enhanced duty cycle (moon +twilight observations) R. Scientific Highlights from MAGIC Observations R. M. M.Wagner: Wagner: Scientific Highlights fromagn MAGIC AGN Observations
3 TeV Blazars Extragalactic VHE! -ray sources Blazars: Jets viewed under small angle Strong nonthermal radiation High variability at all wavelenghts High Doppler factors expected: Jets may attain high luminosities γ-rays are messenger particles, may allow to probe properties of: Leptonic acceleration in the jets Hadronic acceleration } (E!>0 GeV) 21 n4 Mk 180 kn + M S o M e ma W Co kn o M ) 3C (z= o L Lac 234 B Objects o 13 detected by MAGIC 6 first-time detections Recent additions discussed here: Up-to-date plot available at 3C 279, 1ES , S hadronic model Kino et al. Inverse synchrotron peak Buckley 99 Compton peak Redshift z Active Galactic Nuclei: Extragalactic objects Small fraction of observed galaxies Harbor supermassive black holes of 6 solar masses Rotating accretion disk Emission of collimated, relativistic jets +90
4 Northern Blazar Multi-Wavelength Campaigns Simultaneous Multifrequency Observations SEDs spanning over > 15 orders of magnitude VHE: HESS, MAGIC X-ray: Suzaku, Swift Optical: KVA Multi-Wavelength Campaigns in 2006/7 on Mkn 421 April 06: clear detection in all instruments Mkn 501 July 06: lowest VHE state ever observed (MAGIC, Suzaku, KVA) 1ES , 1H : significant X-ray variability, VHE still under study PG July 06: No significant variability, first MWL campaign, VHE compatible with earlier measurements Multi-Wavelength campaings successfully conducted Analyses of 1ES and 1H finished soon Further campaigns organized SED Mkn 501 lowest VHE state ever
5 1ES : Suzaku, Swift, & MAGIC Tagliaferri et al. + MAGIC ApJ 679 (2008) 29 Multi-Wavelength campaign in May 2006 Swift-XRT nights, Suzaku 2 nights Suzaku/Swift in good agreement Relatively high X-ray/optical flux, X-ray peak: shifts with increasing flux 14.3h VHE data: among lowest VHE flux (60% of low flux measured by MAGIC 2004) Spectral Energy Distribution γ-ray light curve MAGIC Modeling: One-zone SSC w.r.t SED: similar parameters source slightly more compact (7.3 x 15 cm), magnetic field slightly lower (0.25 G) Doppler factor identical (D=18) Differential Energy Spectrum
6 Energy-Delayed Flare Mkn 501 MAGIC Collab. ApJ 669, 892 & arxiv: Observed 2 flares in July 2005 from bright blazar Mkn 501, 4-Crab level (Albert+07a) 2005 July 9: Delayed observation of high energies in the flare Quantification of the Delay: ECF: Maximize intrinsic power of flare (Albert+07b) Likelihood Function Fit (Martinez & Errando 2008) Measured delay: (0.030±0.012) s/gev Zero-delay probability P=0.026, effect marginal Interpretation of the Observed Delay: GeV GeV 1. Gradual inefficient acceleration of electrons acceleration efficiency: ξ -5 (Albert+07) 2. Gradually-accelerated blob model clear prediction for GLAST+IACT MWL 3. Extrinsic propagation effect attributed to Lorentz invariance violation Poster #45: RMW & Bednarek GeV delay implies QG energy scale 0.4 x 18 GeV but delay marginal: probing the Planck mass scale MQG > 0.21 x 18 GeV (95% CL) > 1200 GeV
7 M87: A Giant in Our Backyard Peculiar VHE source: Radio galaxy, non-blazar Misaligned Blazar Jet seen under an angle of 30 Jet clearly visible, resolved jet morphology. Close! Only 16 Mpc away. Source of UHECR? VHE Detections by HEGRA, H.E.S.S., VERITAS /s) ( -9 /m 2 Φ >730GeV 20 HEGRA H.E.S.S. VERITAS Acciari+08 Radio VLBA 8 GHz HST-1 Harris+07 nucleus knot D knot A X-rays Chandra X-rays: HST-1 sometimes brighter than nucleus Poster #156: Fast variability Knot A as VHE source excluded Beilicke et al. Collaborative VERITAS/MAGIC/H.E.S.S. monitoring aiming at good TeV coverage, Organized schedule, Data exchange, Chandra & Swift coverage, 120h in 2008
8 M87: Strong Flaring in M87 Beginning of 2008: Nucleus bright in X-rays (at all-time high), while HST-1 rather dim (courtesy D. Harris) 8 σ on 2008 Feb 1: Trigger issued to H.E.S.S./VERITAS GeV 9.9 σ in overall sample (22.8 h) 2008 Jan 30-Feb 11, including moon and twilight data VHE Flux variable 3%-15% Crab, Apparent & high variability >350 GeV Confirming day-scale variability (5.6 σ) Compatibility with const GeV Marginal: spectral hardening? constant flux MAGIC Collab. ApJL subm., arxiv: Poster #137: Mazin,RMW et al. (Crab nebula) >350 GeV α= 2.2 α= 2.6 day-scale : 5.6 σ
9 Do Optical Triggers Work? Regular optical monitoring of candidate sources, e.g.: Mkn 180 Trigger point MAGIC Collab., ApJ 648 (2006) L5, ApJ 667 (2007) L21 March 2006 MAGIC 12.1 h S=5.5 σ Optical light curves: KVA telescope, La Palma 1ES Trigger point MAGIC 2006 MAGIC 2007 MAGIC 18.7 h S=6.2 σ March-May 07 Soft spectrum: Γ=3.3 after EBL deabsorption % Crab at 200 GeV No significant variability 3 σ in 2006 data. If 2006 signal genuine, then 50% lower flux than in ES From the optical spectrum we determined the redshift to be z = ± 0.02 Third-most distant VHE γ-ray source
10 A Continuing Success Story... MAGIC Collab., Atel #1500 Optical light curve: KVA telescope, La Palma S MAGIC PRELIMINARY KVA R-band optical Significance 6.8 σ Known blazar with unknown redshift October/November 2007: X-ray outburst, detected by Swift April 17, 2008: Optical flux doubled within three nights April 22, 2008: MAGIC observations commence Optical trigger on S : MAGIC observations in 2008 April 2.6h of data, clear signal (6.8 σ): discovery! April 28: Swift reports F(0.3- kev) = 4x -11 erg/cm²/s, about 50% larger than that observed in 2007 Apr 29: ATel #1500, MAGIC reports 6.8σ discovery Apr F(>400 GeV) -11 ph/cm²/s ( 25% Crab) 3rd low-peaked VHE Blazar after BL Lac & W Comae Host galaxy detected: z=0.31±0.08 (Nilsson+08) Have taken further data analysis in progress Poster #25: Lindfors & Mazin
11 3C 279: A Famous Blazar Flat Spectrum Radio Quasar at z=0.536 Apparent luminosity 48 erg/s Brightest EGRET AGN (Wehrle+97,98) Gamma-ray flares in 1991 and 1996: High dynamical range in EGRET data Fast time variation: ΔT ~ 6hr in 1996 flare No strong emission lines: Appears like BL Lac during high optical epochs (Wehrle+98) R. M. Wagner: Scientific Highlights Highlights from MAGIC from AGN MAGIC Observations AGN Observations x0 MAGIC Observations: 2006 January April during WEBT campaign 9.7 hrs in nights Detection in 2 nights s -1 ] -2 Integral flux (0-500 GeV) [cm Counts MAGIC Collab. Science 320, Feb Feb σ 2.2σ Flux incompatible with const.: 5.04 σ Contrib. Talk: Errando 180 ALPHA Plot February ±28 Excess Events 6.2 Standard Deviations ALPHA [deg] Time (Julian Date )
12 νi 3C 279: Implications for the EBL EBL influences observed spectrum, resulting in an exponential decrease at high energies & cutoff We reconstruct intrinsic spectrum along EBL models Stecker+07, Primack+05, Kneiske Stecker fast-evolution: α*=0.5±1.2 Kneiske (tuned): α*=1.5 Primack: α*=2.9±0.9 High EBL difficult to reconcile with Blazar acceleration models Overall energetics 3C 279: No strong emission lines Assume α*=1.5 reasonable Infer gamma-ray horizon (Kneiske tuned) Allowed region for EBL rather small Probe back to z=0.536 HST and Spitzer may correctly estimate EBL Contrib. Talk: Errando s -1 ] cm -2-1 differential flux, dn/de [TeV probing 0.2-2μm ) -1 sr -2 (nw m ν α=4.1 fit to measured spectrum: -α dn/de = N E 0 200GeV - = (5.2 ± 1.7) [TeV N 0 α = 4.11 ± MAGIC Collab. Science 320, c279, measured systematic error band EBL-corrected, Primack, α* = 2.94 ± 0.91 EBL-corrected, Stecker (fast), α* = 0.49 ± 1-1 cm -2 s -1 ] Energy, E [GeV] Stecker et al., 2006, (fast evolution) max-ebl (this work) Primack et al., 2005 Cosmic Microwave Background Mazin & Raue, upper limit 2007 HESS upper limit, λ (µm)
13 Summary & Conclusions There are now 23 AGNs observed in E>0 GeV γ-rays, mostly (18) high-peaked BL Lac objects Delay in a VHE flare in Mkn 501 Different models to explain delay Now reaching much further in redshift 3C 279 & S Non-HBLs: BL Lac, S (MAGIC), W Comae (VERITAS), 3C 279 (FSRQ, MAGIC 2006) First FSRQ in TeV gamma-rays: All source classes of the blazar sequence detected in VHE very distant, important input for EBL! and M87 (2008 shared HESS/VERITAS/MAGIC campaign) day-scale variability on the way to identifying the TeV engine in M87 Successful optical triggers lead to discovery of Mkn 180 (2006), and far-away 1ES (z=0.212, 2007) & S (z=0.31±0.08, 2008) MWL on Northern TeV Blazars Mkn 501, Mkn 421, PG , 1ES analyzed 1H , 1ES under analysis
14 Outlook Novel trigger concept: Sum-trigger Further lower analysis threshold, also for AGNs Contrib. Talk: Schweizer MAGIC-II operational second half of 2008 (Inauguration Sep 2008) Improvement of sensitivity (up to factor 3) Great time for AGN physics! MAGIC AGN-related contributions: - Errando 3C 279 (oral Tuesday) - Mazin+, Beilicke+ M 87 #156 - Lindfors+Mazin: Optical ToO #25 - Hadasch+ PKS #95 - Berger+ BL Lacertae #118
Status of the MAGIC telescopes
SNOWPAC 2010 Status of the MAGIC telescopes Pierre Colin for the MAGIC collaboration Max-Planck-Institut für physik (Munich) Status of the MAGIC telescopes MAGIC-1 MAGIC-2 Outline: Recent results of the
More informationDetermining the TeV Gamma-Ray Emission Region in the Relativistic Jet of M87 using TeV and Radio Monitoring
Determining the TeV Gamma-Ray Emission Region in the Relativistic Jet of M87 using TeV and Radio Monitoring R. M. Wagner Max-Planck-Institut für Physik, München and Excellence Cluster Origin and Structure
More informationPhysics Insights from Recent MAGIC AGN Observations
Physics Insights from Recent MAGIC AGN Observations R. M. Wagner on behalf of the MAGIC Collaboration Max-Planck-Institut für Physik & Excellence Cluster Universe München Introduction: MAGIC Recent Multiwavelength
More informationTeV γ-ray observations with VERITAS and the prospects of the TeV/radio connection
TeV γ-ray observations with VERITAS and the prospects of the TeV/radio connection Matthias Beilicke for the VERITAS collaboration Washington University in St.Louis, Physics Department and McDonnell Center
More information10 Years. of TeV Extragalactic Science. with VERITAS. Amy Furniss California State University East Bay
55 555 56 565 57 55 555 56 565 57 55 555 56 565 57 572 574 576 578 57 5712 5714 5716 572 574 576 578 57 5712 5714 5716 5712 5713 5714 5715 5716 5712 5713 5714 5715 5716 5712 5713 5714 5715 5716 5712 5713
More informationConstraints on Extragalactic Background Light from Cherenkov telescopes: status and perspectives for the next 5 years
Constraints on Extragalactic Background Light from Cherenkov telescopes: status and perspectives for the next 5 years Daniel Mazin 1 and Martin Raue 2 1: IFAE, Barcelona 2: MPIK, Heidelberg This research
More informationExtreme high-energy variability of Markarian 421
Extreme high-energy variability of Markarian 421 Mrk 421 an extreme blazar Previous observations outstanding science issues 2001 Observations by VERITAS/Whipple 10 m 2001 Light Curve Energy spectrum is
More informationGamma-ray observations of blazars with the Whipple 10 m telescope
Gamma-ray observations of blazars with the Whipple 1 m telescope, presented on behalf of the VERITAS collaboration. E-mail: edward.collins.hughes@gmail.com This paper presents a status update of the current
More informationVERITAS Observations of Relativistic Jets
VERITAS Observations of Relativistic Jets 1 for the VERITAS Collaboration 1Barnard College, Columbia University Sensitivity improvement: 1% Crab in ~25 hr Sensitive energy range: 100 GeV to 30 TeV Spectral
More informationOBSERVATIONS OF VERY HIGH ENERGY GAMMA RAYS FROM M87 BY VERITAS
OBSERVATIONS OF VERY HIGH ENERGY GAMMA RAYS FROM M87 BY VERITAS 1 Tülün Ergin (U. of Massachusetts Amherst, MA) on behalf of the VERITAS Collaboration (http://veritas.sao.arizona.edu) APOD, 2004 December
More informationVery High Energy monitoring of the radio galaxy M87 with MAGIC during a low emission state between 2012 and 2015
Very High Energy monitoring of the radio galaxy M87 with MAGIC during a low emission state between 2012 and 2015 ICRR, U-Tokyo and Max-Planck-Institute for Physics, Munich and P. Bangale, M. Manganaro,
More informationTeV Observations of Extragalactic Sources
TeV Observations of Extragalactic Sources Henric Krawczynski (Washington University in St. Louis), Oct. 2, 2009 Plan of Talk: Status of Experiments Key-Results: Radio Galaxies Blazars Starburst Galaxies
More informationThe connection between millimeter and gamma-ray emission in AGNs
The connection between millimeter and gamma-ray emission in AGNs Marcello Giroletti INAF Istituto di Radioastronomia Secondo Workshop sull'astronomia millimetrica e submillimetrica in Italia Bologna, 2-3
More informationObservations of Active Galactic Nuclei at very high energies with H.E.S.S.
Observations of Active Galactic Nuclei at very high energies with H.E.S.S. Robert Wagner for the H.E.S.S. Collaboration http://www.mpi-hd.mpg.de/hess/ @hesstelescopes 1 H.E.S.S. High Energy Stereoscopic
More informationNon-Blazar Gamma-ray Active Galactic Nuclei seen by Fermi-LAT. C.C. Teddy Cheung Naval Research Lab/NRC on behalf of the Fermi-LAT Collaboration
Non-Blazar Gamma-ray Active Galactic Nuclei seen by Fermi-LAT C.C. Teddy Cheung Naval Research Lab/NRC on behalf of the Fermi-LAT Collaboration 1 st LAT AGN Catalog (1LAC) Summary FmJ 2010 Entire 1LAC:
More informationThe Extragalactic Gamma-Ray View of AGILE and Fermi
INAF, Osservatorio Astronomico di Capodimonte 22 February 2012 The Extragalactic Gamma-Ray View of AGILE and Fermi Elena Pian INAF, Trieste Astronomical Observatory & Scuola Normale Superiore di Pisa UNIFIED
More informationRecent highlights from VERITAS
Recent highlights from VERITAS K. Ragan McGill University RICAP 2011, Rome, 26-May-2011 K. Ragan VERITAS RICAP '11 1 Outline Very high-energy (VHE) gamma-ray astrophysics Ground-based observations with
More informationRecent Observations of Supernova Remnants
1 Recent Observations of Supernova Remnants with VERITAS Tülün Ergin (U. of Massachusetts Amherst, MA) on behalf of the VERITAS Collaboration (http://veritas.sao.arizona.edu) 2 Contents Supernova Remnants
More informationMulti-Wavelength Observations of PG
Multi-Wavelength Observations of PG 1553+113 Daniela Dorner abc, Anita Reimer d, Olaf Reimer d, Luigi Costamante d and Greg Madejski de a Universität Würzburg, b Integral Science Data Centre, c ETH Zürich,
More informationAGILE and Blazars: the Unexpected, the Unprecedented, and the Uncut
AGILE and Blazars: the Unexpected, the Unprecedented, and the Uncut Rome, AGILE γ-ray Symposium 2017.12.12 Stefano Vercellone (INAF-OAB) 1 Rationale A review of the whole set of AGILE results on extra-galactic
More informationActive Galactic Nuclei in the MeV-GeV band (first results from Fermi)
Active Galactic Nuclei in the MeV-GeV band (first results from Fermi) Gino Tosti University & INFN Perugia On behalf of the Fermi-LAT Collaboration 1 Active Galactic Nuclei (AGN) EGRET showed that AGN
More informationThe 2006 Giant Flare in PKS and Unidentified TeV Sources. Justin Finke Naval Research Laboratory 5 June 2008
The 2006 Giant Flare in PKS 2155-304 and Unidentified TeV Sources Justin Finke Naval Research Laboratory 5 June 2008 Outline Part I: The SSC Model Part II: The giant flare in PKS 2155-304 Part III: Blazars
More informationMAGIC detection of very-high-energy gamma-ray emission from the z = 0.94 blazar PKS
MAGIC detection of very-high-energy gamma-ray emission from the z = 0.94 blazar PKS 1441+25 Miguel Nievas Rosillo Co-authors: J. Becerra, M. Manganaro, F. Tavecchio MW Collaborators: E. Lindfors, J. Sitarek,
More informationRecent Results from VERITAS
Recent Results from VERITAS Physics Department, McGill University, Montreal, Canada E-mail: hanna@physics.mcgill.ca VERITAS (Very Energetic Radiation Imaging Telescope Array System) is an array of four
More informationOrigin of X-rays in blazars
Origin of X-rays in blazars Greg Madejski, Stanford / KIPAC With much of the work presented here done by Amy Furniss, Masaaki Hayashida, Krzysztof Nalewajko, Marek Sikora, Jim Chiang, David Paneque, Mislav
More informationLecture 10: TeV Blazars and EBL
40th Saas-Fee Course: Astrophysics at Very High Energies Lecture 10: TeV Blazars and EBL F.A. Aharonian, DIAS (Dublin) & MPIK (Heidelberg) Les Diablerets, March 15-20, 2010 Blazars - sub-class of AGN dominated
More informationStatus of TeV AGN Studies
Status of TeV AGN Studies Wystan Benbow Harvard-Smithsonian Center for Astrophysics AGN Physics in the CTA Era Workshop, Toulouse, France, May 16, 2011 The Extragalactic VHE Gamma-ray Sky May 1, 2011:
More informationLong term multi-wavelength variability studies of the blazar PKS
52nd Rencontres de Moriond 2017 Very High Energy Phenomena in the Universe Long term multi-wavelength variability studies of the blazar PKS 2155-304 Jill Chevalier D. Sanchez, P. Serpico, J-P. Lenain,
More informationFermi Source Analyses and Identifying VERITAS Candidates
Fermi Source Analyses and Identifying VERITAS Candidates 1 1 1. University of California, Berkeley 2 Overview Introduction VERITAS Fermi Analysis Likelihood Doppler Factor Estimation Motivations Blazars
More informationMWL. A Brief Advertisement Before Your Regularly Scheduled Program
MWL A Brief Advertisement Before Your Regularly Scheduled Program PKS 1441+25 PKS 1441+25 z=0.939! VHE detection over more than a single day! PKS 1441+25 37.7% polarization! PKS 1441+25 Continues optical
More informationVERITAS detection of VHE emission from the optically bright quasar OJ 287
VERITAS detection of VHE emission from the optically bright quasar OJ 287 S. Zola & NASA/JPL S. O Brien For The VERITAS Collaboration Outline 1. OJ 287 2. Historical Observations and Monitoring Programs
More informationTwo exceptional γ-ray flares of PKS and their implications on blazar and fundamental physics
Two exceptional γ-ray flares of PKS 2155-304 and their implications on blazar and fundamental physics Rolf Bühler MPIK Heidelberg KIPAC Tea Talk SLAC 9th December 2008 H.E.S.S. Telescopes Located in Namibia
More informationDiversity of Multi-wavelength Behavior of Relativistic Jet in 3C 279 Discovered During the Fermi Era
Diversity of Multi-wavelength Behavior of Relativistic Jet in 3C 279 Discovered During the Fermi Era Rapid Variability of Blazar 3C 279 during Flaring States in 2013-2014 with Joint Fermi-LAT, NuSTAR,
More informationM87 in context: the radio gamma-ray connection in misaligned AGNs
M87 in context: the radio gamma-ray connection in misaligned AGNs M. Giroletti and F. D'Ammando on behalf of the Fermi-LAT collaboration, and C. Casadio, P. Grandi, K. Hada M87 Workshop: Towards the 100th
More informationHighlights from the VERITAS AGN Observation Program
Highlights from the VERITAS AGN Observation Program W. Benbow 1,a) and the VERITAS Collaboration 2 1 Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA, 02180, USA 2 http://veritas.sao.arizona.edu/
More information(Fermi observations of) High-energy emissions from gamma-ray bursts
(Fermi observations of) High-energy emissions from gamma-ray bursts Hiroyasu Tajima on behalf of Fermi LAT and GBM Collaborations Kavli Institute of Particle Astrophysics and Cosmology SLAC National Accelerator
More informationGLAST and beyond GLAST: TeV Astrophysics
GLAST and beyond GLAST: TeV Astrophysics Outline: Greg Madejski Assistant Director for Scientific Programs, SLAC / Kavli Institute for Astrophysics and Cosmology Recent excitement of GLAST and plans for
More informationFermi: Highlights of GeV Gamma-ray Astronomy
Fermi: Highlights of GeV Gamma-ray Astronomy Dave Thompson NASA GSFC On behalf of the Fermi Gamma-ray Space Telescope Large Area Telescope Collaboration Neutrino Oscillation Workshop Otranto, Lecce, Italy
More informationVery High Energy gamma-ray radiogalaxies and blazars
Very High Energy gamma-ray radiogalaxies and blazars Hélène Sol Paris Observatory, CNRS JD6, The connection between radio properties and High-Energy emission in AGNs Outline The sample of AGN currently
More informationThe blazar Mrk 421: a short multifrequency review
Mem. S.A.It. Vol. 83, 122 c SAIt 2012 Memorie della The blazar Mrk 421: a short multifrequency review I. Donnarumma on behalf of the AGILE Team INAF IASF Roma, Via Fosso del Cavaliere 100, I-00133 Roma,
More informationFlaring Active Galactic Nuclei: the view from Fermi-LAT
Flaring Active Galactic Nuclei: the view from Fermi-LAT INAF-IASF IASF Palermo On behalf of the Fermi-LAT Collaboration and many multi-wavelength collaborators SciNeGHE 2010 1 The EGRET Era AGN dominate
More informationBlazars in gamma-ray views
Blazars in gamma-ray views Challenges of AGN jets@naoj, Mitaka 19 January 2017 Masaaki Hayashida M.Hayashida et al. 2015, ApJ, in press (Institute Cosmic-ray research, (arxiv:1502.04699) the Univ. of Tokyo)
More informationHigh Energy Emission. Brenda Dingus, LANL HAWC
High Energy Emission from GRBs Brenda Dingus, LANL HAWC What are GRBs? Cosmological distance Typical observed z>1 Energy released is up to few times the rest mass of Sun (if isotropic) in a few seconds
More informationHigh-z Blazar SEDs Clues to Evolution in the Early Universe. Hongjun An Roger Romani on behalf of the Fermi-LAT Collaboration
High-z Blazar SEDs Clues to Evolution in the Early Universe Hongjun An Roger Romani on behalf of the Fermi-LAT Collaboration Outline Blazars Blazar emission and spectral energy distribution (SED) models
More informationPERSPECTIVES of HIGH ENERGY NEUTRINO ASTRONOMY. Paolo Lipari Vulcano 27 may 2006
PERSPECTIVES of HIGH ENERGY NEUTRINO ASTRONOMY Paolo Lipari Vulcano 27 may 2006 High Energy Neutrino Astrophysics will CERTAINLY become an essential field in a New Multi-Messenger Astrophysics What is
More informationVery High Energy Gamma Ray Observations with the MAGIC Telescope (a biased selection) Nepomuk Otte for the MAGIC collaboration
Very High Energy Gamma Ray Observations with the MAGIC Telescope (a biased selection) Nepomuk Otte for the MAGIC collaboration Imaging air shower Cherenkov technique The MAGIC telescope Observation of
More informationVERITAS Observations of Starburst Galaxies. The Discovery of VHE Gamma Rays from a Starburst Galaxy
VERITAS Observations of Starburst Galaxies The Discovery of VHE Gamma Rays from a Starburst Galaxy Wystan Benbow for the VERITAS Collaboration 1 Harvard-Smithsonian Center for Astrophysics 1 see R.A. Ong
More informationExtragalactic Science with the CTA. A. Zech, LUTH
Extragalactic Science with the CTA A. Zech, LUTH "extragalactic" KSPs Active Galaxies Transients Galaxy Clusters blazars, radio-galaxies, other AGN EBL, IGMF fundamental physics GRBs galactic transients
More informationGamma-ray Astrophysics
Gamma-ray Astrophysics AGN Pulsar SNR GRB Radio Galaxy The very high energy -ray sky NEPPSR 25 Aug. 2004 Many thanks to Rene Ong at UCLA Guy Blaylock U. of Massachusetts Why gamma rays? Extragalactic Background
More informationGamma-ray Observations of Blazars with VERITAS and Fermi
Gamma-ray Observations of Blazars with VERITAS and Fermi University College Dublin E-mail: annacannon1984@gmail.com VERITAS (the Very Energetic Radiation Imaging Telescope Array System) is an array of
More informationTEV GAMMA RAY ASTRONOMY WITH VERITAS
1 TEV GAMMA RAY ASTRONOMY WITH VERITAS Tülün Ergin (U. of Massachusetts Amherst, MA) on behalf of the VERITAS Collaboration 2 Contents The VERITAS Experiment Results and the Performance Galactic Sources
More informationVariability of Extragalactic VHE γ-ray Emitters
Variability of Extragalactic VHE γ-ray Emitters Wystan Benbow Harvard-Smithsonian Center for Astrophysics APS April 2011 Meeting, Anaheim, CA Very High Energy (VHE) γ-ray Astronomy VHE: ~100 GeV to ~100
More informationNEUTRINOS ON ICE THE SEARCH FOR THE COSMIC-RAY SOURCES FE KRAUSS, J. WILMS, M. KADLER, M. KRETER
NEUTRINOS ON ICE THE SEARCH FOR THE COSMIC-RAY SOURCES FE KRAUSS, J. WILMS, M. KADLER, M. KRETER FELICIA.KRAUSS@UVA.NL COSMIC RAYS 2a COSMIC RAYS 1896: Henri Becquerel discovery of radioactivity 1909:
More informationCosmological Background Radiation and Extragalactic Gamma-ray Opacity
Cosmological Background Radiation and Extragalactic Gamma-ray Opacity Rudy Gilmore SISSA TeV Particle Astrophysics July 21, 2010 Collaborators: Joel Primack - UCSC Rachel Somerville - STScI (Baltimore)
More informationHigh-Energy Emission from GRBs: First Year Highlights from the Fermi Gamma-ray Space Telescope
High-Energy Emission from GRBs: First Year Highlights from the Fermi Gamma-ray Space Telescope Jonathan Granot University of Hertfordshire (Royal Society Wolfson Research Merit Award Holder) on behalf
More informationVHE gamma-ray emission from binary systems observed with the MAGIC telescopes
VHE gamma-ray emission from binary systems observed with the MAGIC telescopes Alicia López Oramas (IAC) O. Blanch, E. de Oña Wilhelmi, A. Fernández-Barral, D. Hadasch, J. Herrera, E. Moretti, P. Munar-Adrover,
More informationPoS(extremesky2009)035
INFN and INAF Trieste - University of Udine and LIP/IST Lisboa E-mail: alessandro.de.angelis@cern.ch Ground-based gamma-ray astronomy is part of a new field of fundamental research of Astroparticle Physics,
More informationVERITAS a Status Report. Nepomuk Otte on behalf of the VERITAS Collaboration
VERITAS a Status Report Nepomuk Otte on behalf of the VERITAS Collaboration The VERITAS Collaboration ~100 members, 20 institutions 23 non-affiliated members +35 associate members Smithsonian Astrophysical
More informationStudies on the VHE γ-ray/x-ray correlation in high-synchrotron peak BL Lacs
Studies on the VHE γ-ray/x-ray correlation in high-synchrotron peak BL Lacs Magda Gonzalez Instituto de Astronomía, UNAM, México Nissim Fraija 1, Barbara Patricelli 2, José Andrés García 3 & Simone Dichiara
More informationProbing the diffuse Extragalactic Background Light (EBL) with gamma ray blazars
Probing the diffuse Extragalactic Background Light (EBL) with gamma ray blazars Luigi Costamante (HEPL/KIPAC, Stanford University) Diagnostic: the interplay between GeV TeV and EBL spectra Progresses in
More informationPulsars with MAGIC. Jezabel R. Garcia on behalf of the MAGIC collaboration
Pulsars with MAGIC Jezabel R. Garcia on behalf of the MAGIC collaboration Introduction to MAGIC - Energy range: ~50 GeV to 50 TeV - Energy resolution: 15% (@1TeV) 23% (@100 GeV) - Angular resolution: 0.06
More informationFACT. Alerts from TeV Gamma Rays in the Context of Multi Messenger Astrophysics. Daniela Dorner for the FACT Collaboration
FACT Alerts from TeV Gamma Rays in the Context of Multi Messenger Astrophysics for the FACT Collaboration First G APD Cherenkov Telescope Major Goals Proof of principle: Silicon based photo sensors (G
More informationThe Measurement of the Expansion Rate of the Universe from γ-ray Attenuation*
The Measurement of the Expansion Rate of the Universe from γ-ray Attenuation* Alberto Domínguez (University of California, Riverside) Collaborators: Justin Finke, Francisco Prada, Joel Primack, Brian Siana
More informationModelling the Variability of Blazar Jets
Modelling the Variability of Blazar Jets A Selfconsistent SSC Model Matthias Weidinger Institut für Theoretische Physik und Astrophysik, Universität Würzburg GRK Tage: 24. Juli 2009 M. Weidinger (Uni Wü)
More informationGalactic Sources with Milagro and HAWC. Jordan Goodman for the HAWC and Milagro Collaborations
Galactic Sources with Milagro and HAWC Jordan Goodman for the HAWC and Milagro Collaborations Snowpack 2010 Milagro and HAWC Milagro was a first generation wide-field gamma-ray telescope: Proposed in 1990
More informationThe first detection of the blazar S at VHE with the MAGIC Telescopes during an exceptionally high optical state
The first detection of the blazar S4 0954+65 at VHE with the MAGIC Telescopes during an exceptionally high optical state Giovanna Pedaletti on behalf of the MAGIC and Fermi collaborations and the MWL team
More informationVERITAS: exploring the high energy Universe
VERITAS: exploring the high energy Universe K. Ragan McGill University Queen's - March '09 VERITAS 1 Outline Beyond the optical Very high-energy (VHE) gamma-ray astrophysics Ground-based observations Cherenkov
More informationBlazar science with mm-vlbi. Marcello Giroletti, Monica Orienti, Filippo D Ammando on behalf of the Fermi-LAT collaboration
Blazar science with mm-vlbi Marcello Giroletti, Monica Orienti, Filippo D Ammando on behalf of the Fermi-LAT collaboration Outline Why are blazars interesting? mm-vlbi & blazar sampler 7mm, 3mm, 1.3mm
More informationGamma-Rays from Radio Galaxies: Fermi-LAT
Gamma-Rays from Radio Galaxies: Fermi-LAT PAOLA GRANDI INAF/IASF BOLOGNA, ITALY on behalf of the FERMI LAT Collaboration Many thanks to : C. Dermer. G. Ghisellini, L. Maraschi, G. Migliori, E. Torresi,
More informationProblematiche astrofisica VHE
Istituto Nazionale di Fisica Nucleare Problematiche astrofisica VHE Antonio Stamerra Università di Siena & INFN Pisa JC - 10 febbraio 2010 Pisa antonio.stamerra@pi.infn.it IACT detector IACT Imaging Atmospheric
More informationInvestigating the jet structure and its link with the location of the high-energy emitting region in radio-loud AGN
Investigating the jet structure and its link with the location of the high-energy emitting region in radio-loud AGN Filippo D Ammando (INAF-IRA and DIFA Bologna) Monica Orienti (INAF-IRA) Marcello Giroletti
More informationMisaligned AGN with Fermi-Lat:
Misaligned AGN with Fermi-Lat: a different perspective on relativistic jets PAOLA GRANDI INAF/IASF BOLOGNA, ITALY on behalf of the FERMI LAT Collaboration Many thanks to : Torresi E., Migliori G., P. Malaguti,
More informationCherenkov Telescope Array ELINA LINDFORS, TUORLA OBSERVATORY ON BEHALF OF CTA CONSORTIUM, TAUP
Cherenkov Telescope Array A SENSITIVE PROBE OF EXTREME UNIVERSE ELINA LINDFORS, TUORLA OBSERVATORY ON BEHALF OF CTA CONSORTIUM, TAUP 2015 1 The CTA Observatory SST ( 4m) LST ( 23m) MST ( 12m) South North
More informationThe third Fermi LAT AGN catalogue and beyond
The third Fermi LAT AGN catalogue and beyond Filippo D Ammando (DIFA and INAF-IRA Bologna) on behalf of the Fermi LAT Collaboration dammando@ira.inaf.it 1 Different classes of AGN Quasars Radio-quiet or
More informationVery high energy gamma-emission of Perseus Cluster
Very high energy gamma-emission of Perseus Cluster V.G. SINITSYNA, V.Y. SINITSYNA P. N. Lebedev Physical Institute, Leninsky prospect 53, Moscow, 119991 Russia VERY-HIGH ENERGY GAMMA-RAY ASTRONOMY of GALACTIC
More informationarxiv: v1 [astro-ph.he] 28 Aug 2015
arxiv:1508.07358v1 [astro-ph.he] 28 Aug 2015 for the VERITAS Collaboration University of Minnesota E-mail: shahin@astro.umn.edu HESS J1943+213 is a very-high-energy (VHE; >0 GeV) gamma-ray point source
More informationAGILE and multi-wavelength campaigns on blazars!
14 th AGILE Workshop AGILE and multi-wavelength campaigns on blazars S. Vercellone (INAF/IASF Palermo) on behalf of the AGILE AGN WG S. Vercellone INAF/IASF Palermo 14 th AGILE Workshop Rome, June 20-21
More informationTeV Future: APS White Paper
TeV Future: APS White Paper APS commissioned a white paper on the "Status and Future of very high energy gamma ray astronomy. For preliminary information, see http://cherenkov.physics.iastate.edu/wp Working
More informationPoS(SWIFT 10)142. The Swift-XRT observations of HBL Source 1ES
The Swift-XRT observations of HBL Source 1ES 199+ ab, Patrizia Romano b, Stefano Vercellone b, Sergo Kapanadze a, Grigol Kharshiladze c a E. Kharadze Abastumani Astrophysical Observatory, Ilia State University,
More informationScientific highlights and status of the MAGIC Telescope
Scientific highlights and status of the Telescope Outline: Introduction Galactic observations Extragalactic observations Dark mater searches -II Marcos Lopez INFN/Padova The Collaboration Collaboration:
More informationAnalysis of Five Fermi-LAT LBL/IBL BL Lac Objects: Examining the June 2011 Gamma-ray Flare of BL Lacertae
Analysis of Five Fermi-LAT LBL/IBL BL Lac Objects: Examining the June 2011 Gamma-ray Flare of BL Lacertae Valerie Marchenko 3 August 2012, Nevis Labs, Columbia University https://news.slac.stanford.edu/sites/default/files/images/image/blazar-search-st.jpg
More informationNot only typical flaring blazars in the Fermi gamma-ray sky. The strange cases of SBS and PKS
Not only typical flaring blazars in the Fermi gamma-ray sky. The strange cases of SBS 0846+513 and PKS 0521-36 Filippo D Ammando (University of Perugia and INFN) and M. Orienti (Univ. of Bologna and INAF-IRA)
More informationVERITAS detection of VHE emission from the optically bright quasar OJ 287
VERITAS detection of VHE emission from the optically bright quasar OJ 287 for the VERITAS Collaboration University College Dublin E-mail: stephan.o-brien@ucdconnect.ie We report on the VERITAS detection
More informationGamma-ray emitting narrow-line Seyfert 1 galaxies and their place in the AGN zoo
Gamma-ray emitting narrow-line Seyfert 1 galaxies and their place in the AGN zoo Filippo D Ammando (DIFA and INAF-IRA Bologna) Monica Orienti, Justin Finke, Marcello Giroletti, Josefin Larsson on behalf
More informationEBL Studies with the Fermi Gamma-ray Space Telescope
EBL Studies with the Fermi Gamma-ray Space Telescope Luis C. Reyes KICP The Extragalactic Background Light (EBL) What is it? Accumulation of all energy releases in the form of electromagnetic radiation.
More informationGamma-ray Astrophysics with VERITAS: Exploring the violent Universe
Gamma-ray Astrophysics with VERITAS: Exploring the violent Universe K. Ragan McGill University Soup & Science 11-Jan-2008 Soup & Science Jan. '08 1 How do we know about the Universe? Historically, all
More informationGround Based Gamma Ray Astronomy with Cherenkov Telescopes. HAGAR Team
Ground Based Gamma Ray Astronomy with Cherenkov Telescopes HAGAR Team DHEP Annual Meeting, 7-8 April, 2016 Projects : HAGAR Telescope System Development of G-APD based imaging camera Calibration device
More informationg and n from TeV blazars
g and n from TeV blazars Matteo Cerruti CNRS, LPNHE, Paris TeVPA 2017, Columbus, OH, USA 08/11/17 1 CAVEAT Extremely biased talk! Towards TeV sources (as in title) Only focused on stationary states, no
More informationExtreme blazars and the VHE connection
Extreme blazars and the VHE connection Berrie Giebels - LLR Ecole Polytechnique Very High Energy (VHE) emission above 100 GeV has been confirmed from 6 extragalactic sources (Blazars) by multiple observatories.
More informationCTB 37A & CTB 37B - The fake twins SNRs
Annecy le vieux CTB 37A & CTB 37B - The fake twins SNRs LAPP Annecy CTB 37: a complex complex 843 MHz MGPS map (Green et al. 1999) Bright region in radio emission Thought to be 2 SNRs plus a bridge and
More informationGalactic sources in GeV/TeV Astronomy and the new HESS Results
Galactic sources in GeV/TeV Astronomy and the new HESS Results Martin Tluczykont for the HESS Collaboration LLR Ecole Polytechnique Joint Symposium on GeV-TeV Astrophysics in the GLAST Era Stanford, September
More informationStatus and latest results of the MAGIC telescope
December 6-8th, 2006 Locating PeV Cosmic-Ray Accelerators: Future Detectors in Multi-TeV γ-ray Astronomy Theoretical part Technical part Experimental part The Čerenkov technique The MAGIC Telescope Data
More informationBlazars as the Astrophysical Counterparts of the IceCube Neutrinos
Blazars as the Astrophysical Counterparts of the IceCube Neutrinos Maria Petropoulou Department of Physics & Astronomy, Purdue University, West Lafayette, USA Einstein Fellows Symposium Harvard-Smithsonian
More informationSIMILARITY AND DIVERSITY OF BLACK HOLE SYSTEMS View from the Very High Energies
SIMILARITY AND DIVERSITY OF BLACK HOLE SYSTEMS View from the Very High Energies 1 Symp. 324, 12-16 September, 2016 Classical view Spinning black hole Accretion disk Collimated jets of particles 2 Looking
More informationThe γ-ray sky seen by H.E.S.S.
The γ-ray sky seen by H.E.S.S. Francesca Volpe MPI-K Heidelberg On behalf of the H.E.S.S Collaboration 08/09/2010 F.Volpe SCINEGHE 2010, Trieste 1 THE HESS experiment Operating since 2003 Energy threshold
More informationMilagro A TeV Observatory for Gamma Ray Bursts
Milagro A TeV Observatory for Gamma Ray Bursts B.L. Dingus and the Milagro Collaboration Los Alamos National Laboratory University of Maryland, University of California Santa Cruz, University of California
More informationMultiwaveband Observations of the TeV Blazar PKS with HESS, Fermi, RXTE and Swift
Multiwaveband Observations of the TeV Blazar PKS 2155-304 with HESS, Fermi, RXTE and Swift David Sanchez on behalf of the Fermi LAT and H.E.S.S. collaborations. LLR 21 janvier 2009 D.Sanchez Multiwaveband
More informationIntroduction to AGN. General Characteristics History Components of AGN The AGN Zoo
Introduction to AGN General Characteristics History Components of AGN The AGN Zoo 1 AGN What are they? Active galactic nucleus compact object in the gravitational center of a galaxy that shows evidence
More informationStudy of Blazars Across Electromagnetic Spectrum
WDS'08 Proceedings of Contributed Papers, Part III, 213 219, 2008. ISBN 978-80-7378-067-8 MATFYZPRESS Study of Blazars Across Electromagnetic Spectrum I. Sujová Charles University, Faculty of Mathematics
More informationModels for the Spectral Energy Distributions and Variability of Blazars
Models for the Spectral Energy Distributions and Variability of Blazars Markus Böttcher Ohio University, Athens, OH, USA Fermi Meets Jansky Bonn, Germany, June 21, 2010 Outline: 1) Introduction to leptonic
More information