VLA observations of GW170817 at 3.3 years post-merger
Abstract
We observed GW170817 with the NSF's Karl G. Jansky Very Large Array (the VLA) at t =1216 days (~3.3 years) after the binary neutron star merger (joint program SL0449, PI: Margutti). In our preliminary analysis, no radio emission is detected at the location of GW170817; we infer a 3-sigma upper limit of ~13 microJy at a central frequency of 3 GHz. Assuming the X-ray flux density recently reported by Hajela et al. (GCN 29041) and a simple power-law spectrum, this is fully consistent with the F_nu ~ nu^-0.575 spectrum observed throughout GW170817's earlier evolution (e.g. Hajela et al. 2019). We thank the VLA staff for scheduling and executing these observations.
- Publication:
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GRB Coordinates Network
- Pub Date:
- December 2020
- Bibcode:
- 2020GCN.29053....1A