# Search for astrophysical PeV gamma rays from point sources with Carpet-2

## TL;DR

This paper reports early results from Carpet-2's search for PeV gamma rays from astrophysical sources, setting upper limits and discussing future prospects with an upgraded detector for higher energy photon searches.

## Contribution

It presents the first upper limits on PeV gamma-ray fluxes from specific astrophysical sources using Carpet-2 data and discusses future improvements with Carpet-3.

## Key findings

- 95% CL upper limits on PeV photon fluxes from selected sources
- Insignificant excess observed from Mrk 421, warranting further monitoring
- Prospects for enhanced sensitivity with the upgraded Carpet-3 detector

## Abstract

Early results of the search for E_\gamma>1 PeV cosmic photons from point sources with the data of Carpet-2, an air-shower array equipped with a 175 m^2 muon detector, are presented. They include 95% CL upper limits on PeV photon fluxes from stacked directions of high-energy IceCube neutrino events and from four predefined sources, Crab, Cyg X-3, Mrk 421 and Mrk 501. An insignificant excess of events from Mrk 421 will be further monitored. Prospects of the use of the upgraded installation, Carpet-3 (410 m^2 muon detector), scheduled to start data taking in 2019, for searches of E_\gamma>100 TeV photons, are briefly discussed.