1920004

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 and possibly NICER). We will also include infrared/optical (ESO) through dedicated proposals. We require 10 observations of 90 ks each (based on what was awarded by the TAC in AO18) pointings taken every second revolution in order to 1) probe the physics of accretion by studying the 0.5-500 keV 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 through broad-band spectral and temporal analysis. Points 1) and 2) can be done by looking into the interplay between the soft and hard X-ray emitters (JEM-X and IBIS + HXMT and/or NICER) point 3) and 4) need contemporaneous broad-band coverages and timing studies (with NICER and HXMT). 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. This is especially true for the recent low (hard) state phase the source has entered in 2018 and which seems to be accompanied with sporadic radio flares. It should also 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 exci [truncated! Please see actual data for full text]