A dataset provided by the European Space Agency

Proposal ID 0720010
Obs ID 07200100001, 07200100003, 07200100004, 07200100005, 07200100006, 07200100008
Title Hard X-ray spectroscopy of two ultraluminous X-ray sources and a low-luminosity AGN
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0720010
DOI https://doi.org/10.57780/esa-lidva0e
Author Sazonov
Abstract The nature of ultraluminous X-ray sources (ULXs) remains controversial. We do not know whether they host stellar- or intermediate-mass black holes, nor do we understand how the accretion onto the compact object proceeds. To help answer these questions, sensitive observations at energies above 10 keV are needed. We propose to observe with INTEGRAL for a total exposure of 4 Msec (2 Msec in AO7 plus another 2 Msec in the next AO) a unique region of the sky where two of the brightest known ULXs are located: M82 X-1 and Holmberg IX X-1. We will measure the spectra of these sources from 3 keV up to 50-100 keV and study their spectral variability. We will also analyze the hard X-ray spectrum of the low-luminosity AGN M81, located in the same field.
Publications
Temporal Coverage 2009-10-17T23:36:29Z / 2010-10-16T12:13:39Z
Version 1.0
Mission Description The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
Creator Contact https://www.cosmos.esa.int/web/integral/helpdesk
Date Published 2025-03-25T09:54:35Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Sazonov, 2025, 'Hard X-ray spectroscopy of two ultraluminous X-ray sources and a low-luminosity AGN', 1.0, European Space Agency, https://doi.org/10.57780/esa-lidva0e