DRAFT
2019-08-26 00:10:30
Type: Object/s-Discovery/Classification
Bibcode: 2019TNSAN..76....1S
Pan-STARRS Search for Kilonovae: discovery of an intrinsically faint transient (AT2019omb) in UGC 00116 (114 Mpc)
Authors: K. W. Smith (QUB), S. J. Smartt, (QUB), K. C. Chambers, M. Huber (IfA, Hawaii), S. Srivastav, O. McBrien, D. R. Young, J. Gillanders, D. O'Neill, P. Clark, S. Sim, (QUB), T. de Boer, J. Bulger, J. Fairlamb, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), C. Stubbs (Harvard), A. Rest (STScI)
Source Group: Pan-STARRS
Keywords: Supernova, Transient
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 PS19erz (AT2019omb) in the host galaxy UGC 00116, at a redshift of z = 0.028, or d = 114 Mpc (from NED).

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 PS19erz (AT2019omb) in the host galaxy UGC 00116, at a redshift of z = 0.028 or d = 114 Mpc (from NED).  The transient was discovered at MJD 58718.61 == 2019-08-23.61, at m_i = 19.69 +/- 0.06. It is offset from the host by 12.83" N, 21.36" E (a projected 11.4 kpc radius from the galaxy centre). At this distance the absolute magnitude is M_i = -15.63 (assuming m-M = 35.28 and foreground extinction of A_i = 0.044). 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.

 

Show current TNS values
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 2019omb [PS19erz] 00:12:39.665 +05:30:32.13 00:12:39.662 +05:30:32.18 SN II 0.028
AstroNote Publication Timestamp Title Authors
2019-48 2019-07-20 17:37:13 Pan-STARRS Search for Kilonovae : discovery of an intrinsically faint transient in UGC 12798 (68 Mpc) S. J. Smartt, (Queen's University Belfast), K. C. Chambers, (IfA, University of Hawaii) K. W. Smith (QUB), M. Huber (IfA), S. Srivastav, O. McBrien, D. R. Young, J. Gillanders, D. O'Neil, P. Clark, S. Sim, (QUB), T. de Boer, J. Bulger, J. Fairlamb, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), C. Stubbs (Harvard), A. Rest (STScI)
File Comments
2019omb.jpg 2019omb finder. Finder is from the stack so does not include the supernova. See also additional finder with SN (but large chip gaps).
2019omb_finder_with_sn.jpg 2019omb finder with SN, but note that there are large chip gaps in the finder (hence no SN finder also included).

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