Spectral Parameters of GX 339-4 during the INTEGRAL observing campaign in January-February 2021

This is going to be associated with an Astronomer's telegram.

We have extracted all INTEGRAL pointings within 12 degrees from the source GX 339-4 from  2021-01-15 to
2021-03-04. We subdivided the spectra in each satellite revolution and performed a fit with a model made of a power-law with exponential roll-over at high energy. When JEM-X data are available, we had to ad a disk black body.