A dataset provided by the European Space Agency

Proposal ID 1020005
Obs ID 10200050001, 10200050002, 10200050003, 10200050004, 10200050005, 10200050006, 10200050007, 10200050008, 10200050009, 10200050010
Title Hard X-ray study of the ultra-compact X-ray binary 4U 0614+091
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:1020005
DOI https://doi.org/10.57780/esa-bzj3a08
Author Chenevez
Abstract We propose a dedicated INTEGRAL monitoring program of the ultra-compact X-ray binary and micro-quasar 4U0614+091 to study its emission properties in hard X-rays. This source is situated in a region of the sky well outside theGalactic bulge and is thus one of the low-mass X-ray binaries being least observed by INTEGRAL. However, 4U0614+091 is an interesting target for several reasons: not only it harbours the closest active X-ray burster, it exhibitsvariations at very different time scales and over the whole electromagnetic spectrum, such as synchrotron jet emission,X-ray flaring states, and thermonuclear X-ray bursts. Moreover, the high energy persistent emission from the source ischaracterised by a particularly hard (non thermal) X-ray tail. Therefore, we want to exploit the INTEGRAL instrumentationto survey the dynamical behaviour of the source, and better describe its spectrum in hard X-rays. The monitoringcampaign we propose (for a total of 500 ks exposure) has been approved for AO-9, but have not yet been performed. Itwill indeed make it possible to follow the evolution of the long term persistent emission variability, as well as toinvestigate the activity of shorter time scale processes. In fact, 4U 0614+091 is also known for having exhibited usualshort X-ray bursts, an hours-long superburst, and several intermediately long bursts with superexpansion of the neutronstars photosphere. The proposed observing strategy will for instance allow us to relate the bursting behaviour of thesource to its broadband emission, and especially to its flaring activity on time scales of days to weeks.The present proposal does also request joint XMM and INTEGRAL observations.
Publications
Temporal Coverage 2013-03-08T18:51:23Z / 2013-10-29T06:09:57Z
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 2025-03-25T09:54:37Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Chenevez, 2025, 'Hard X-ray study of the ultra-compact X-ray binary 4U 0614+091', 1.0, European Space Agency, https://doi.org/10.57780/esa-bzj3a08