Difference: GCNCIRCULAR21851 ( vs. 1)

K. D. Alexander, E. Berger, T. Eftekhari, W. Fong, and R. Margutti report on behalf of a larger collaboration:

We observed the location of the optical counterpart of LIGO/Virgo G298048 (Coulter et al. LVC GCN 21529; Allam et al. LVC GCN 21530) with the Very Large Array at a frequency of 6 GHz (C-band) on September 5.925 UT. We do not detect any significant radio emission (S/N>3) and therefore cannot confirm the radio detection reported two days earlier by Corsi et al. (LVC GCN 21815) for a comparable integration time on source and at the same frequency. This indicates either rapid fading (not expected for off-axis jet emission), significant variability (not expected from scintillation given the small source distance and hence large angular size), or a spurious detection in the previously reported observations. Further observations are underway.

-- ThomasKupfer - 08 Sep 2017