A dataset provided by the European Space Agency

Proposal ID 0520018
Obs ID 05200180001, 05200180002, 05200180003, 05200180004, 05200180005, 05200180006, 05200180007, 05200180008, 05200180009, 05200180010, 05200180011, 05200180012, 05200180014, 05200180015
Title Monitoring the ~900 square degrees centred on GRS 1915+105 at hard X-rays
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0520018
DOI https://doi.org/10.57780/esa-f1n8e00
Author Rodriguez
Abstract GRS 1915 is a key target for the understanding of microquasars and accreting black holes in general. It can undergo, on short timescales (sec-min), transitions that occur on longer timescales (~days to weeks) in other sources. We, hence, can catch them very easily while pointing INTEGRAL, and thus have an unique chance to understand their physical origin through a broad band (spectral and temporal) study of the source. We, then, propose to continue the monitoring of GRS 1915+105 and its surroundings during AO5. The simultaneous use of JEM-X in the soft X-rays, IBIS and SPI in the soft Gamma-rays will enable us to study the origin of the spectral transitions giving birth to a particular class of variability. We aim at studying the interplay between the soft and hard X-ray components, the different time scales of their variations in relation with different physical models, and the tight connection between the accretion and ejection processes. For this purpose, we will provide simultaneous radio (Ryle, VLA, Nancay) and infrared (ESO) observations. IBIS, JEM-X are the prime instruments for this study, together with SPI in cases of steady states. Although GRS 1915+105 is the main target of our study, we outline here that amongst the ~10 sources usuallyobserved in this field, our team aims at studying a handful of them with particular attention to IGR J19140+0951 (which is always in the totally coded field of view of IBIS and detectable with JEM-X) with the view to study its spectral behaviour/evolution (along its known orbit), and survey Ser X-1, Aql X-1, XTE J1908+094 (in the TCFOV), the latter 2 are transient, and monitor their X-ray evolution along a possible outburst. For these particular sources, multi-wavelength observations will also be conducted. We request that our observations be undertaken in segments of 20 ks exposures during the entire visibility period of 6 months, once every second revolution, hence 30 pointings for a total observing time of 600 ks.
Publications
Temporal Coverage 2007-10-16T17:26:42Z / 2008-05-11T13:38:10Z
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 2025-03-25T09:54:34Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Rodriguez, 2025, 'Monitoring the ~900 square degrees centred on GRS 1915+105 at hard X-rays', 1.0, European Space Agency, https://doi.org/10.57780/esa-f1n8e00