12–23 Jul 2021
Online
Europe/Berlin timezone

P1 and P2 Emission of the Crab Pulsar for Medium to Large-Size IACT Calibration

16 Jul 2021, 18:00
1h 30m
TBA

TBA

Talk GAI | Gamma Ray Indirect Discussion

Speaker

Dr Razmik Mirzoyan (Max-Planck-Institute for Physics)

Description

Mid to large size imaging atmospheric Cherenkov telescopes for gamma-ray astrophysics in the very high energy domain have a typical threshold of (20 – 200) GeV. In this energy range sensitive observations of the Crab Nebula reveal the emission from the Crab pulsar at phases P1 and P2. Observations of MAGIC show that the P2/P1 is monotonically increasing function of energy. In tens of GeV energy range sensitivity of MAGIC overlaps with that of the Fermi-LAT mission. Comparison of the P2/P1 ratio from the MAGIC and Fermi-LAT Crab pulsar data provides an alternative method to cross-calibrate the two instruments and minimize the impact of Monte Carlo simulations. Here we explore this possibility for absolute calibration of the operational energy range of IACTs.

Keywords

IACT; calibration; Crab pulsar; pulsar emission phase; IACT-Fermi intercalibration; P1 and P2

Subcategory Experimental Results

Primary author

Dr Razmik Mirzoyan (Max-Planck-Institute for Physics)

Co-authors

Giovanni Ceribella (Max-Planck-Institut für Physik) Yuki Iwamura (ICRR, University of Tokyo, Japan) Prof. Takayuki Saito (ICRR) Prof. Masahiro Teshima (ICRR, UTokyo/Max-Planck-Institute for Physics, Munich) Dr Giacomo D'Amico (University of Bergen, Max-Planck-Institute for Physics)

Presentation materials