Gamma astronomy at CPPM with HESS & CTA H. Costantini - - PowerPoint PPT Presentation

CTA/HESS - P3TMA - 5 September 2017

Gamma astronomy at CPPM with HESS & CTA

• H. Costantini

Aix-Marseille Université, CPPM

CTA/HESS - P3TMA - 5 September 2017

Why Gamma Astronomy?

CTA/HESS - P3TMA - 5 September 2017

Why Gamma Astronomy?

• Gamma rays are produced in the most extreme environments of the Universe
• Gamma rays can be used to explore Frontiers in Physics:

relativistic jets produced by massive and supermassive black holes shock waves produced by a star explosion (SuperNova) Gamma Ray Bursts dark matter annihilation signature quantum gravity effects in photon propagation

CTA/HESS - P3TMA - 5 September 2017

protons/nuclei electrons/positrons

p

π0 γ

radiation fields and matter

p

π± ν e± γ

Inverse Compton

Connection cosmic rays-gamma-neutrino

Detection of Gamma Rays at >100 TeV is a signature for CR sources!! Detection of astrophysical neutrinos is smoking gun for CR source!!

CTA/HESS - P3TMA - 5 September 2017

~120 m 1.3o Shower of e- and e+ Cherenkov cone The atmosphere is part

• f the detector
• The mirror reflects the Cherenkov photons
• The camera is on the focal plane of the mirror
• The shower image is detected by the camera

Incoming energetic gamma

High energy Gamma detection

10 km

CTA/HESS - P3TMA - 5 September 2017

located in the Namibia desert 1 large + 4 middle size telescopes stereoscopic reconstruction of the gamma shower

HESS

HESS camera shower image seen in all 5 telescopes

CTA/HESS - P3TMA - 5 September 2017

HESS @ CPPM

• Physics Analysis:
• Research of TeV gamma rays from microquasars
• observations following alerts
• monitoring of X-rays and radio data to

trigger VHE observations with HESS

compact objects (neutron star or black hole) accreting mass from a companion star

CTA/HESS - P3TMA - 5 September 2017

CTA: Cherenkov Telescope Array

• sensitivity x10
• 20 GeV - 300 TeV
• 2 sites: Southern site (Chile), Northern Site (La Palma, Canary Islands)

CTA/HESS - P3TMA - 5 September 2017

CTA: a world wide effort

CTA/HESS - P3TMA - 5 September 2017

CTA South

CTA/HESS - P3TMA - 5 September 2017

CTA Galactic discovery search

CTA/HESS - P3TMA - 5 September 2017

CTA @ CPPM

• Acquisition system and EventBuilder for

the MST (NectarCam) and LST (LSTCam)

• First NectarCam calibration data available

MST LST

Camera stimulator at CPPM

• MC simulations, data-MC comparison

and performance evaluation of GCT (one

• f the SST prototypes)
• First on sky data at Paris (2017)
• First on site data at Chile (2019)

GCT prototype at Observatoire de Paris (Meudon)

CTA/HESS - P3TMA - 5 September 2017

CTA @ CPPM

• Search for PeVatron (Cosmic ray source with

E>PeV) candidates in the galactic plane survey (full CTA and first CTA layout)

• Early Science: Observation on promising

sources

Simulated CTA galactic plane survey

CTA/HESS - P3TMA - 5 September 2017

Training for Students

• Seminars and Computer projects will be proposed by the HESS/CTA group
• Research M2 internship(s) followed by PhD Thesis projects will be proposed
• n:
• Data analysis for physics in HESS (binaries) and extrapolation for CTA
• Monte Carlo studies of CTA performance for galactic science at extreme

energies and participation to CTA data analysis in first phases

• M2 specialised lecture: Astroparticles given by J.P. Ernenwein in 2nd semester

CTA/HESS - P3TMA - 5 September 2017

Who we are @ CPPM?

5 Physicists : 4 Staff + 1 Postdoc 2 Engineers:

John Carr Jean-Pierre Ernenwein Heide Costantini Franca Cassol Cyril Trichard Dirk Hoffman Julien Houles

Contact us!

for info: Heide Costantini

costant@cppm.in2p3.fr

• ffice 307

tel.: 0491 82 72 57