Investigations of Spatially Resolved 1.4 GHz Radio Activity associated with Solar X-Ray Microflares H.S. Sawant¹,Krucker S, S. Kane², M. Karlicky³, S. Ananthakrishnan 4, P. Subramanian 5, and F.R.H. Madsen 1,4,6 1 – INPE – National Institute for Space Research, Sao Jose dos Campos, SP, Brazil. 2 – Space Science Laboratory, University of California, Berkeley, CA, USA. 3 – Ondrejov Observatory, Ondrejov, Czech Republic. 4 – National Centre for Radio Astrophysics – TIFR, Pune, India 5 – IUCAA – Inter University Centre for Astronomy and Astrophysics – Pune, India 6 – CNPq Research Scholar – CNPq, Brazil GMRT Parameters ● 30 parabolic dishes, 45 m diameter ● Baselines: Longest ~ 26 km, Shortest ~ 100 m ● Configuration maximizes uv coverage and resolution ● Frequencies of operation: 150, 235, 325, 610 and MHz ● Spectral capability: up to 256 channels and 32 MHz BW ● Resolution 2 – 20 arcsec (1450 – 150 MHz) FOV 26 arcmin – 3.5 deg (1450 – 150 MHz) Observations: November 20 th and 22 nd, 2005

GMRT – RHESSI: Timeframes with superposition

Results GMRT Light curve at point (X,Y) ~ (300,130) GMRT couterpart to a RHESSI event at 9:39 UT - Position: X ~ 300 Y ~ 130

Investigations of Spatially Resolved 1.4 GHz Radio Activity associated with Solar X-Ray Microflares H.S.Sawant¹, S. Krucker 2, F. Madsen 1, S Kane², M.Karlicky³, S. Ananthakrishnan 4 and P. Subramanian INPE – National Institute for Space Research – Sao Jose dos Campos, SP – Brazil. 2 - Space Science Laboratory, University of California, Berkeley – CA – USA. 3 - Ondrejov Observatory – Ondrejov – Check Repblica. 4 - National Center of Radio Astronomy – TIFR – Pune – India 5 - Inter University Centre for Astronomy and Astrophysics – Pune – India ABSTRACT On 20 and 22 November 2005, Solar observations at 1280 MHz were carried out from 04:00 to 11:30UT at the Giant Metrewave Radio Telescope (GMRT) with time resolution of 512 ms and spatial resolution of ~ 5 arc sec. During GMRT observation time on both days, micro flares have been observed by RHESSI satellites in the range of (3 – 10) keV. Detailed investigation of the X- ray emission shows the presence of both thermal and non-thermal components. Imaging analysis of one of the micro flares in x ray shows the RHESSI data can produce image with resolution of 7". Here we report an investigation of simultaneous 1.28 GHz radio activity and 3-10 keV X-ray observations of solar X-ray micro flares as observed on November 20 th.