Jan 20 – 24, 2025 Solar physics Conference
Asia/Kolkata timezone

The Gauribidanur Radio Observatory: Current Status and Future Plans

Jan 22, 2025, 4:05 PM
15m

Speaker

Kathiravan Chidambaram

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

Primary authors

Mr Gireesh G. V. S, (Indian Institute of Astrophysics) Mr Indrajit Barve (Indian Institute of Astrophysics) Kathiravan Chidambaram Prof. Ramesh R (Indian Institute of Astrophysics)

Presentation materials

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