LIGO/Virgo S190814bv: Detection of a candidate radio counterpart with ASKAP
Abstract
We report the discovery of a rising radio source detected with the Australian Square Kilometre Array Pathfinder (ASKAP) within the 95% localisation volume of S190814bv (GCN 25324). The observations were conducted at a frequency of 943 MHz on 2019-08-16 and 2019-08-23 (see GCN 25445 and GCN 25472 for details). We searched for sources with a rising flux density between the two observations that are spatially coincident with known galaxies selected from the GLADE catalogue (Dálya et al. 2018). One candidate is ASKAP 005547-270433, reported as AT2019osy on the Transient Name Server, at RA = 00:55:47, Dec = -27:04:33, offset ~1 arcsecond from 2dFGRS TGS211Z177. ASKAP 005547-270433 has a 943 MHz integrated flux density of 376 +/- 33 uJy in epoch 1 and 550 +/- 34 uJy in epoch 2. The redshift of 2dFGRS TGS211Z177 is 0.0738, which is consistent with the luminosity distance of S190814bv (270+/-50 Mpc, GCN 25324). Further analysis of these ASKAP observations are ongoing and future epochs are planned. Thank you to CSIRO staff for supporting these observations.
- Publication:
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GRB Coordinates Network
- Pub Date:
- August 2019
- Bibcode:
- 2019GCN.25487....1S