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PS17dfh: a bright, nearby transient discovered by PSST

ATel #10464; 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), J. Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii)
on 5 Jun 2017; 19:16 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ken Smith (k.w.smith@qub.ac.uk)

Subjects: Optical, Supernovae

We report the discovery of the following nearby transient 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 Chambers et al. arXiv:1612.05560, Huber et al. ATel #7153).

Name      | PS Name | RA (J2000)  | Dec (J2000) | Disc. Date | Disc Mag | Notes 
AT2017emq | PS17dfh | 10 00 18.56 | +54 32 23.1 |  20170603  |  15.66 i |  (1) 

The transient is offset (5.13 arcsec) from the likely host galaxy UGC 05369 which has a velocity of 1573 km/s (z=0.005247 - from NED) or D = 24 +/- 3 Mpc. Assuming association between the transient and host galaxy, at this distance (0.59 kpc, mu=31.90), the transient is M_i = -16.2 (including foreground extinction A_i = 0.011).

Examination of ATLAS images from 11 days prior to the PS1 discovery shows no detection to about 19 mag and implies that the object is less than 11 days old.

Spectroscopic observations are encouraged.