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 PS19euy (AT2019owj) in the host galaxy 2MASX J20052545-2012030, at a redshift of z = 0.033 or d = 135 Mpc (from NED). The transient was discovered at MJD 58723.36 == 2019-08-28.36, at m_w = 19.89 +/- 0.07. It is offset from the host by 1.69" N, 0.25" W (a projected 289.5 kpc radius from the galaxy centre). At this distance the absolute magnitude is M_w = -16.11 (assuming m-M = 35.65 and foreground extinction of A_r = 0.354). 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 | 2019owj [PS19euy] | 20:05:25.443 | -20:12:01.44 | SN | 0.033 | 20:05:25.443 | -20:12:01.44 |
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