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).
In normal survey mode, Pan-STARRS takes 4 x 45s exposures in w, i or z each night reaching 5 sigma magnitudes of w<22, i<21 and z<20.5 in each frame (see Chambers et al. 2016, 1612.05560).
We report the discovery of an intrinsically faint transient PS19gir (AT2019trt) in the host galaxy IC0121, at a redshift of z = 0.03, or d = 122Mpc (from NED). The transient was discovered at MJD 58785.35 (2019-10-29.35) at mag w = 21.2+/- 0.1. It is offset from the host by 0.0" S, 5.3" W ( a projected 2.9 kpc radius from the galaxy centre). At this distance the absolute magnitude is M_w = -14.1 (assuming m-M = 35.3 and foreground exinction of A_r = 0.059). Spectroscopic classification is encouraged.
Information on all objects discovered by the "Pan-STARRS search for kilonovae" will be made available at http://star.pst.qub.ac.uk/ps1threepi/. We will release AstroNotes for all these candidates and encourage spectroscopic classification or photometric follow-up. A finder is attached.
These discoveries are a byproduct of the Pan-STARRS NEO survey observations supported by the NASA Grants, including No. NNX14AM74G issued through the SSO Near Earth Object Observations Program.
Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
---|---|---|---|---|---|---|---|---|---|---|---|---|
TNS | 2019trt | 01:28:21.437 | +02:30:46.98 | 01:28:21.428 | +02:30:46.94 |
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