---
author:
- 'F. Ursini, L. Bassani, A. Malizia, A. Bazzano, A. J. Bird, J. B. Stephen,'
- 'P. Ubertini'
bibliography:
- 'mybib.bib'
date: 'Received ...; accepted ...'
title: 'The coronal temperature of NGC 4388 and NGC 2110 measured with *INTEGRAL*[^1]'
---

[ We aim to measure the physical properties of the hot X-ray corona of two active galactic nuclei, [NGC 4388]{} and [NGC 2110]{}. ]{} [We analysed the hard X-ray (20–300 keV) [[*INTEGRAL*]{}]{} spectrum in conjunction with archival [[*XMM–Newton*]{}]{} and [[*NuSTAR*]{}]{} data.]{} [The X-ray spectrum of both sources is phenomenologically well described by an absorbed cut-off power law. In agreement with previous results, we find no evidence of a Compton reflection component in these sources. We obtain a high-energy cut-off of [$200^{+ 75}_{- 40}$]{} keV for [NGC 4388]{} and [$320^{+ 100}_{- 60}$]{} keV for [NGC 2110]{}. A fit with a thermal Comptonisation model yields a coronal temperature of [$80^{+ 40}_{- 20}$]{} keV and [$75^{+ 20}_{- 15}$]{} keV, respectively, and an optical depth of approximately two, assuming a spherical geometry. The coronal temperature and luminosity of both sources are consistent with pair production that acts as a thermostat for the thermal plasma. These results emphasise the importance of good signal-to-noise 