A dataset provided by the European Space Agency

Proposal ID 0220028
Obs ID 02200280001, 02200280002, 02200280003, 02200280004, 02200280005
Title New facets of GRS 1915+105
Download Data Associated to the proposal https://isla.esac.esa.int/tap/download/bundle?format=ascii_curl&product_id=prop_id:0220028
DOI https://doi.org/10.57780/esa-h1gj90h
Author Rodriguez
Abstract Encouraged by the success of the AO1 INTEGRAL monitoring campaign on GRS 1915+105, we propose to continue the monitoring of the most enigmatic microquasar of our Galaxy during AO2. Two of our three AO1 observation, q`and the 2 ToO observations, were primilary done during the plateau state of the source. Our main goal is to obtain time-resolved hard X-ray spectra of all the fundamental states of GRS 1915+105 in order to fix the origin of the hard tail - as seen by IBIS and SPI - and thus enable us to test different models: Comptonization by thermal, nonthermal or free-fall electrons, and/or synchrotron emission from the compact jet. In addition we are in position to provide simultaneous radio and infrared observations which will allow us to further study the accretion-ejection links. JEM-X will allow us to discriminate between spectral states in the course of each observation and study, with the long exposure time, the very low frequency QPOs (<10 mHz). As for the past campaign, the INTEGRAL observations will be conducted simultaneously with RXTE in order to explore the rapid variability (0.1-100 Hz) at both low and high energies. The complementarity of the INTEGRAL instruments will also enable us to study any possible annihilation line features. To achieve our goals and especially obtain spectra up to very high energy we need long exposure times. We request that our observations be undertaken in segments of 100 ksec exposures. To meet our scientific goals, we require ten such segments, each separated by approximately one month, compatible with scheduling constraints.
Publications
Temporal Coverage 2004-10-18T08:57:07Z / 2005-05-14T20:51:31Z
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 2025-03-25T09:54:30Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Rodriguez, 2025, 'New facets of GRS 1915+105', 1.0, European Space Agency, https://doi.org/10.57780/esa-h1gj90h