We propose an INTEGRAL-multiwavelengh monitoring of GRS 1915+105 with the goal to understand the tight connections that exist between the different emitting media, and placed in a broader context, understand accreting-ejecting sources in general. After a succesfull campaign in the past, here we propose to renew this type of monitoring taking advantage of new facilities (especially the Sardinia radio telescope in the radio domain), while tentatively increasing the number of wavelengths covered by including infrared (ESO facilities), and gamma-ray (Fermi) observations. Other X-ray facilities will also be considered. We require 45 ks pointings taken every second revolution, in order to 1) probe the physics of accretion by studying the X-ray emission of the source, 2) study the origin of the high variability of GRS 1915+105, 3) understand the connections between accretion and ejection processes, and 4) constrain physical models of emission processes. Points 1) and 2) can be done by looking into the interplay between the soft and hard X-ray emitters (therefore with JEM-X and IBIS), point 3) needs contemporaneous X-ray/radio/IR coverage, and point 4) will make use of Fermi-INTEGRAL observations. Besides these specific points this monitoring will allow us to accumulate more data and thus have a better view of the (rather unknown) behaviour of this source beyond 200 keV. It should be noted that GRS 1915+105 lies in a quite crowded field, with many variable sources such as X-ray binaries of all types, the enigmatic microquasar SS 433, and a couple of highly absorbed IGR sources. This survey will also permit all these sources to be studied in a regular manner. Such a monitoring will greatly participate to the INTEGRAL legacy by bringing new data on a dozen of exciting Galactic sources.
Publications
An infrared study of Galactic OH/IR stars - III. Variability properties of the Arecibo sample - Jimenez-Esteban, F. M., Engels, D.,Aguado, D. S.,Gonzalez, J. B.,Garcia-Lario, P. (2021-08-01) http://ui.adsabs.harvard.edu/#abs/2021MNRAS.505.6051J
Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV - Siegert, Thomas, Berteaud, Joanna,Calore, Francesca,Serpico, Pasquale D.,Weinberger, Christoph (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...660A.130S
Gamma-Ray Emission of 60Fe and 26Al Radioactivity in Our Galaxy - Wang, W., Siegert, T.,Dai, Z. G.,Diehl, R.,Greiner, J.,Heger, A.,Krause, M.,Lang, M.,Pleintinger, M. M. M.,Zhang, X. L. (2020-02-01) http://ui.adsabs.harvard.edu/#abs/2020ApJ...889..169W
INTEGRAL study of MAXI J1535-571, MAXI J1820+070, and MAXI J1348 - 630 outbursts. I. Detection and polarization properties of the high-energy emission - Cangemi, F., Rodriguez, J.,Belloni, T.,Gouiffes, C.,Grinberg, V.,Laurent, P.,Petrucci, P. -O.,Wilms, J. (2023-01-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...669A..65C
Magnetars and axion-like particles: probes with the hard X-ray spectrum - Fortin, Jean-Francois, Guo, Huai-Ke,Harris, Steven P.,Sheridan, Elijah,Sinha, Kuver (2021-06-01) http://ui.adsabs.harvard.edu/#abs/2021JCAP...06..036F
Primordial black hole dark matter in the context of extra dimensions - Friedlander, Avi, Mack, Katherine J.,Schon, Sarah,Song, Ningqiang,Vincent, Aaron C. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022PhRvD.105j3508F
26Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P
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.
European Space Agency, Rodriguez, 2026, 'A new monitoring campaign on GRS 1915+105 over the electromagnetic spectrum', 1.0, European Space Agency, https://doi.org/10.57780/esa-x74dbzu