MAGIC observations of the unidentified TeV gamma-ray source TeV J2032+4130

TL;DR

This paper reports MAGIC telescope observations of the unidentified TeV gamma-ray source TeV J2032+4130, confirming its detection, measuring its flux, position, and spectrum with improved sensitivity and consistency with previous measurements.

Contribution

First detailed MAGIC observations of TeV J2032+4130, providing refined flux, position, and spectral data with the lowest energy threshold to date.

Findings

Detected the source with 5.6 sigma significance.

Measured flux and spectrum consistent with previous HEGRA results.

Obtained a hard photon index of approximately -2.0.

Abstract

We observed the first known very high energy (VHE) gamma-ray emitting unidentified source, TeV J2032+4130, for 94 hours with the MAGIC telescope. The source was detected with a significance of 5.6 sigma. The flux, position, and angular extension are compatible with the previous ones measured by the HEGRA telescope system five years ago. The integral flux amounts to (4.5+-0.3stat+-0.35sys)x10^{-13} ph cm$^{-2}$ s$^{-1}$ above 1 TeV. The source energy spectrum, obtained with the lowest energy threshold to date, is compatible with a single power law with a hard photon index of Gamma=-2.0+-0.3stat+-0.2sys.