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ATEL # 2667; D. Young, S. Valenti, P. Dunstall, K. Smith, S. Smartt, R. Kotak, Queen's University, Belfast (QUB); R. Chornock, R. Foley, A. Rest, and G. Narayan, Harvard-Smithsonian Center for Astrophysics (CfA); M. Huber, Johns Hopkins University (JHU); C. Stubbs, CfA; A. Riess, JHU; and W. M. Wood-Vasey, University of Pittsburgh, J. Tonry, P. A. Price, E. Magnier, K. Chambers, N. Kaiser, J. Morgan, W. Burgett, J. Heasley, B. Sweeney, C. Waters, H. Flewelling Institute for Astronomy, University of Hawaii
on 11 Jun 2010; 9:48 UT
Distributed as an Instant Email Notice (Supernova)
Password Certification: Stephen Smartt (email@example.com)
Subjects: Optical, Nova, Supernova
Further to CBET 2214, we report the discovery of an additional spectroscopically-confirmed supernova in the Pan-STARRS-1 Medium Deep Survey. PS1-1000252 was discovered 12-13 days before peak on May 10.3 UT (r=22) at 10:45:09.35s +58:33:16.5 (J2000). It is 0.4" from the center of the host galaxy SDSS J104509.30+583316.4. Spectra were obtained at the William Herschel Telescope (+ ISIS; range 320-1000 nm) on June. 8.8 UT for PS1-1000252 and compared with a library of supernova spectra using the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383). The spectrum closely matches that of the type-Ia supernova 2005am (cf. Iauc 8490) 2 weeks after maximum light at redshift z = 0.25, confirming the early discovery epoch. This announcement was enabled using the PS1 System operated by the PS1 Science Consortium (PS1SC) and its member institutions, and made possible through the PS1 Builders: http://www.ps1sc.org/PS1_System_ATel.htm.