Speaker
Description
The Gauribidanur Radio Observatory (GRO) is one of a few solar radio observatories functioning for the past few decades. It has four major facilities, viz., the Gauribidanur RAdioheliograPH (GRAPH), the Gauribidanur LOw-frequency Solar Spectrograph (GLOSS), the Gauribidanur Radio Interferometric Polarimeter (GRIP), and the Gauribidanur RAdio Spectro-polarimeter (GRASP). The GRAPH simultaneously images the Sun at two spot frequencies, viz., 53 and 80 MHz, during its local meridian transit; the spatial resolution at 80 MHz is 4′×7′(RA×Dec.), and the image-dynamic range is ≈22 dB. The GLOSS observes the Sun as a point source and produces the solar radio dynamic spectrum in 50-500 MHz over 2:30-10:30 UT. The frequency resolution and the dynamic range of a dynamic spectrum are ≈500 kHz and 40 dB, respectively. The GRIP observes the polarized radio emission from the Sun in 30-130 MHz over 2:30-10:30 UT. The dynamic range of the total and circularly polarized flux profiles is ≈30 dB and has a spectral resolution of about 1.5 MHz. The GRASP observes the Sun as a point source and produces the dynamic spectra of the total and circularly polarized flux in the 15-35 MHz during 2:30-10:30 UT. The spectra have a dynamic range of ≈30 dB and a spectral resolution of 2 kHz. Apart from the solar facilities, we have recently established a new small array to observe the non-solar radio transients, the Pulsars, FRBs, etc. The talk will briefly cover the observing facilities, highlight the results, the ongoing facility upgrade, and the plans for the future.
Contribution Type | |
---|---|
Theme | Energetic Phenomena |