VLA-RHESSI observations of a flare on August 22, 2002

Fig. 1. Plots of RHESSI count rateand VLA brightness temperature at 3.5 cm and 6.2 cm wavelengths

Fig. 2. A series of RHESSI snapshot maps on August 22, 2002 - FOV = 128"

bursts on February 5, 2000 at the UT times indicated. Here the field of view is 157". The locations of the M and X bursts are marked by arrows on the image at 19:26:18 UT

Fig. 3. A sequence of RHESSI snapshot maps (30 sec avg) at 14:18:00 UT (top) and 14:18:30 UT (bottom) in different energy channels

Fig. 4. A sequence of VLA snapshot maps at 6.2 cm wavelength taken at the times indicated on August 22, 2002. They have been overlaid on TRACE 195 A images at the times indicated. Here the field of view is 2' x 2'.

Fig. 5. A sequence of VLA snapshot maps at 3.5 cm wavelength taken at the times indicated on August 22, 2002. They have been overlaid on TRACE 195 A images at the times indicated. Here the field of view is 1.5' x 1.5'.

Fig. 6. VLA snapshot maps at 3.5 cm and 6.2 cm at 14:19:13 UT are overlaid on EIT, RHESSI and MDI images at the same times.

Fig. 7. A VLA snapshot map at 3.5 cm wavelength on August 22, 2002 that has been overlaid on a TRACE difference image - left (14:19:30 - 14:18:36 UT) , a RHESSI 12-25 kev image (middle) and an MDI magnetogram (right) Here the field of view is 4' x 4'. Note how the new EUV and hard X-ray loops appear to coincide and that one of the 3.5 cm sources lies at the northern footpoint of this loop.

Fig. 8. Spectral fits to RHESSI data on August 22, 2002 at the times indicated. The parameter a0 denotes the thermal emission measure in units of 10**49 cm**-3, the parameter a1 denotes the plasma temperature, in units of 10**6 K, and the parameter a5 denotes the negative power-law index above the spectral break. .