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Young Supernova Discovered by Pan-STARRS

ATel #7672; R. J. Foley (Illinois), K. W. Smith, D. Wright, S. J. Smartt (Queen's University Belfast), M. Huber, K. C. Chambers, H. Flewelling, M. Willman, N. Primak, A. Schultz, B. Gibson, E. Magnier, C. Waters, J. Tonry, R. J. Wainscoat (IfA, Hawaii), S. W. Jha (Rutgers), A. Rest (STScI), D. Scolnic (Chicago/KICP)
on 20 Jun 2015; 00:29 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (rfoley@illinois.edu)

Subjects: Optical, Supernovae, Transient

A transient has been discovered as part of the Pan-STARRS Survey for Transients (PSST) at a w band (wide-band) magnitude of 20.4 in a series of 4 images on 18 June 2015. No object is present in i-band imaging obtained on 2 June 2015 to a limit of ~20.7 mag. The object, PS15aux, is 13.65" East and 13.20" North of IC 1342 (z = 0.027; D = 118 Mpc; mu = 35.36 mag; Milky Way Av = 0.11 mag), which also hosted the SN Ia 2013fn (CBET 3662). Therefore SN 2013fn and PS15aux may present an opportunity to measure independent distances to the same galaxy. As such occurrences are relatively rare, we wish to bring attention of this discovery to the community. At the distance of IC 1342, and assuming no host-galaxy reddening, PS15aux is currently M = -14.9 mag. If PS15aux is an unreddened SN Ia, it is ~4.3 mag below peak magnitude. 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). We will send all objects brighter than 18 mag as ATel alerts, while all other objects can be found on these webpages. Name | RA (J2000) | Dec (J2000) | Disc. Date | Disc Mag | filter | Notes PS15ash | 21 00 26.38 | -14 29 31.9 | 20150618 | 20.39 | w |