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Two Nearby supernova candidates discovered by PSST in NGC4532 and UGC09113

ATel #10283; K. W. Smith, D. Wright, S. J. Smartt (Queen's University Belfast), M. Huber, K. C. Chambers, H. Flewelling, M. Willman, A. Schultz, T. Lowe, E. Magnier, C. Waters, R. J. Wainscoat (IfA, Hawaii), R. J. Foley (Illinois), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 18 Apr 2017; 21:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ken Smith (k.w.smith@qub.ac.uk)

Subjects: Optical, Supernovae

Referred to by ATel #: 10299

Two nearby transients have been discovered as part of the Pan-STARRS Survey for Transients (PSST). Information on all objects discovered by the Pan-STARRS Survey for Transients is available at http://star.pst.qub.ac.uk/ps1threepi/ (see Huber et al. ATel #7153). The distances to both galaxies (approximately 45Mpc and 13Mpc) imply that these are intrinsically faint supernova candidates. They may be young, or heavily reddenned, or old in the case of PS17chm. Spectroscopic classification is encouraged.

 
Name      | PS Name | RA (J2000)  | Dec (J2000) | Disc. Date | Disc Mag | Notes 
AT2017dau | PS17chm | 14 14 17.08 | +35 25 43.4 |  20170412  |  19.32 i |  (1) 
AT2017des | PS17cke | 12 34 18.89 | +06 28 27.0 |  20170416  |  19.69 w |  (2) 

(1) NED reports that the probable host (33.65" offset) is UGC 09113, with spectroscopic redshift z=0.010621, hence mu=33.34 (45Mpc) A_i=0.04 hence M_i ~ -14.0. The only limit is a y >18, 55 days before discovery. Hence it could be an old SN.
(2) NED reports that the probable host (24.26" offset) is NGC 4532, with spectroscopic redshift z=0.006711. The distance estimate is mu=30.65 (13Mpc), A_r=0.05 hence M_r ~ -12.9. A limit of w>21.5 on 2017-04-03 implies it is not an old SN.