DRAFT
2019-10-09 15:39:03
Type: Object/s-Discovery/Classification
Bibcode: 2019TNSAN..99....1S
Pan-STARRS Search for Kilonovae: PS2 discovery of an intrinsically faint transient (AT2019set) in CGCG 483-035 (133 Mpc)
Authors: K. W. Smith, 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 with Pan-STARRS2 of an intrinsically faint transient PS19fxk (AT2019set) in the host galaxy CGCG 483-035, at a redshift of z = 0.032, or d = 133 Mpc (from NED), at w = 20.00 +/- 0.07 and M_w = 15.9.

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). 

The second telescope in the Pan-STARRS system (PS2, Chambers et al. AstroNote 2019-81) is undergoing scientific commissioning. 

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 with Pan-STARRS2 of an intrinsically faint transient PS19fxk (AT2019set) in the host galaxy CGCG 483-035, at a redshift of z = 0.032 or d = 133 Mpc (from NED).  The transient was discovered at MJD 58761.57 == 2019-10-05.57, at m_w = 20.00 +/- 0.07. It is offset from the host by 6.92" N, 1.79" W (a projected 5.1 kpc radius from the galaxy centre). At this distance the absolute magnitude is M_w = -15.9 (assuming m-M = 35.62 and foreground extinction of A_r = 0.261). Spectroscopic classification is encouraged. 

We will release AstroNotes for all these kilonova 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 2019set [PS19fxk] 02:25:16.214 +24:16:00.07 SN 0.032 02:25:16.214 +24:16:00.07
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)
2019-81 2019-08-29 00:16:40 Pan-STARRS Search for Kilonovae: discovery of two intrinsically faint transients (AT2019ouq at 158 Mpc and AT2019ovs at 203 Mpc) with Pan-STARRS2 K. C. Chambers, M. Huber (IfA, Hawaii), S. J. Smartt, K. W. Smith, 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)
File Comments
2019set_finder.jpg Finder for 2019set
2019set_finder_with_transient.jpg Finder for 2019set with transient present

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