Table 2. Key parameters of the BMIT-ID source computed in SPECTRA10 (the source size was verified by observations of penumbral blurring).

Source parameters
Magnetic field	2.5 T	3.7 T
Critical energy	14 keV	21 keV
Source size (H × V),  FWHM	0.8 mm × 0.1 mm	1.2 mm × 0.1 mm
Beam parameters,  59 m from source	@ 30 keV	@ 100 keV
Beam size (H × V),  FWHM	160 × 10 mm	180 × 7 mm
Photon flux [photons  mm−2 s−1 (0.1%  bandwidth)−1]	3 × 1011	7.5 × 1010