Simulated Gamma-Ray Pulse Profile of the Crab Pulsar with the Cherenkov Telescope Array

Abstract

We present simulations of the very high energy (VHE) gamma-ray light curve of the Crab pulsar as observed by the Cherenkov Telescope Array (CTA). The CTA pulse profile of the Crab pulsar is simulated with the specific goal of determining the accuracy of the position of the interpulse. We fit the pulse shape obtained by the MAGIC telescope with a three-Gaussian template and rescale it to account for the different CTA instrumental and observational configurations. Simulations are performed for different configurations of CTA and for the ASTRI mini-array. The northern CTA configuration will provide an improvement of a factor of ~3 in accuracy with an observing time comparable to that of MAGIC (73 hours). Unless the VHE spectrum above 1 TeV behaves differently from what we presently know, unreasonably long observing times are required for a significant detection of the pulsations of the Crab pulsar with the high-energy-range sub-arrays. We also found that an independent VHE timing analysis is feasible with Large Size Telescopes (LSTs). CTA will provide a significant improvement in determining the VHE pulse shape parameters necessary to constrain theoretical models of the gamma-ray emission of the Crab pulsar. One of such parameters is the shift in phase between peaks in the pulse profile at VHE and in other energy bands that, if detected, may point to different locations of the emission regions.

11 pages, 11 figures, 5 tables

References in corpus (16)

• The ATNF Pulsar Catalogue
• Observations of the Crab Nebula with H.E.S.S
• Observation of Pulsed Gamma-rays Above 25 GeV from the Crab Pulsar with MAGIC
• Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC
• Measurement of the Crab Nebula spectrum over three decades in energy with the MAGIC telescopes
• Radio-to-TeV Phase-resolved Emission from the Crab Pulsar: The Annular Gap Model
• H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray Flare
• Simultaneous Absolute Timing of the Crab Pulsar at Radio and Optical Wavelengths
• Very high energy emission as a probe of relativistic magnetic reconnection in pulsar winds
• Detection of bridge emission above 50 GeV from the Crab pulsar with the MAGIC telescopes
• INTEGRAL observations of the Crab pulsar
• The XMM-Newton view of the Crab
• Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope
• The ASTRI mini-array within the future Cherenkov Telescope Array
• Precision Measurement of Optical Pulsation using a Cherenkov Telescope
• The INAF ASTRI Project in the framework of CTA

Cited by in corpus (2)

• Prospects for the detection of high-energy (E>25 GeV) Fermi pulsars with the Cherenkov Telescope Array
• Prospects for the characterization of the VHE emission from the Crab Nebula and Pulsar with the Cherenkov Telescope Array