Pan-STARRS Search for Kilonovae: discovery of PS19hgw, an intrinsically faint transient in KUG 0152+311 (144 Mpc)
Abstract
We are carrying out the "Pan-STARRS Search for Kilonovae" which is a focused search for intrinsically faint transients, or rapidly evolving transients in galaxies which are closer than 200 Mpc in the ongoing Pan-STARRS Near Earth Object surveys (see Smartt et al. AstroNote 2019-48 for details). Here we report the discovery of an intrinsically faint transient PS19hgw (AT2019wxt) in the host galaxy KUG 0152+311, at a redshift of z = 0.036, or d = 144 Mpc (from NED). It has an absolute magnitude at discovery of M_i = -16.6. We note that this is in the 80% contour of the skymap of the possible BNS gravitational wave source S191213g (the LALInference.fits.gz, The LIGO Scientific Collaboration and the Virgo Collaboration, GCN 26402), was discovered after the merger time, and is at a distance consistent with the parameter estimation of LVC for this event.
- Publication:
-
Transient Name Server AstroNote
- Pub Date:
- December 2019
- Bibcode:
- 2019TNSAN.154....1S
- Keywords:
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- Supernova;
- Transient;
- PS19hgw;
- 2019wxt;
- AT2019wxt;
- AT 2019wxt