2020002

We propose to continue the INTEGRAL/multi-wavelengh 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. We will still take advantage of other facilities we included in the past AOs (the Sardinia and Medicina radio telescopes Insight-HXMT in the X-rays when GRS 1915+105 is bright enough to be detected and NICER). Based on the suggestions of AO18s TAC and to continue with the strategy of our AO 19 program we request 10 observations of 90 ks each taken every second revolution in order to 1) probe the physics of accretion by studying the 3--500 keV emission of the source 2) understand the connections between accretion and ejection processes 3) continue monitoring GRS 1915+105 in a rare albeit long-lasting low luminosity state never seen before 2018. Here providing the sources states remains unchanged this program will allow us to accumulate more data and thus have a better view of the (rather unknown) behaviour of this source beyond 200 keV. These 3 points can almost be studied with INTEGRAL only (and our radio program for point 2). In addition INTEGRAL with NICER and HXMT can help to study the origin of the high variability of GRS 1915+105 constrain physical models of emission processes through broad-band spectral and temporal analysis. 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 for a dozen of exciting Galactic sources. [truncated! Please see actual data for full text]