uGMRT observations of the 2021 outburst of RS Ophiuchi
ATel #14899; Nayana A. J. (IIA), G. C. Anupama (IIA), Dipankar Banerjee (PRL), Nirupam Roy (IISc), K. P. Singh (IISER-Mohali), and L. S. Sonith (IIA)
on 6 Sep 2021; 17:10 UT
Credential Certification: Nayana AJ (nayana@ncra.tifr.res.in)
We report observations of the recurrent nova RS Ophiuchi (AAVSO Alert Notice 752) with the upgraded Giant Metrewave Radio Telescope (uGMRT). The observations were done in the 550-850 MHz band (band-4) on 2021 August 31.67 UT (t ~ 23 days post outburst discovery) and in the 1000-1460 MHz band (band-5) on 2021 Sep 02.53 UT (t ~ 25 days post outburst discovery). We detect radio emission from RS Ophiuchi with a flux density of 85.1 +/- 1.2 mJy at 1.36 GHz and 77.5 +/- 2 mJy at 0.69 GHz. The source is unresolved in our maps. The map resolution is 2.4 X 1.9 arcsec^2 and map rms is 120 uJy/beam in band-5. The map resolution and rms are 5.9 X 3.2 arcsec^2 and 50 uJy/beam, respectively in band-4. The flux densities at roughly similar epochs, at 0.61 and 1.1 GHz in the 2006 outburst, were ~ 48 and 55 mJy, respectively (Kantharia et al. 2007, ApJ, 667, L171). Further observations are planned. We thank the uGMRT staff for carrying out these observations.
