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Discovery of a new supernova and two AGN outburst in the Pan-STARRS1 3Pi faint galaxy supernova survey

ATel #2773; S. Valenti, S. Smartt, D. Young, K. Smith (Queen's University Belfast); N. Metcalfe (Durham University); A., F. Bresolin, R. Kudritzki, J. Tonry, P. A. Price, E. Magnier, K. Chambers, N. Kaiser, J. Morgan, W. Burgett, J. Heasley, W. Sweeney, C. Waters, H. Flewelling (Institute for Astronomy, University of Hawaii)
on 5 Aug 2010; 18:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Valenti (s.valenti@qub.ac.uk)

Subjects: Optical, AGN, Supernovae

Referred to by ATel #: 2784, 3354

report the discovery of a spectroscopically-confirmed Supernova (PS1-1000383) and two AGN (PS1-1000382 and PS1-1000384) in the Pan-STARRS 1 "3Pi Faint galaxy supernova survey". During the course of the PS1 3Pi sky survey, PS1-1000383 was detected on June 3.54 (UT) (Coords: 18:00:03.307 +47:40:59.136, J2000) at i=19.0 and detected again on June 28.55 (UT) at i=19.26 within 0.8 arcsec of the faint SDSS galaxy (J180003.26+474058.7). A spectrum of PS1-1000383 was obtained at the William Herschel Telescope (+ISIS; range 320-1000nm) on Aug 1.9 (UT). Cross-correlation of the observed spectrum with a library of supernova spectra with the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383, available at https://gelato.tng.iac.es/login.cgi) shows it to be similar to that of the type II-P SN 2004et at 2 months past explosion. Using the redshift of z= 0.051, measured from the Balmer narrow lines of the host galaxy, a distance modulus of 36.67 and the observed i magnitude (19.0) at the discovery (June 3.54). PS1-1000383 has an absolute magnitude at discovery of -17.67 and the host galaxy has an absolute magnitude of r=-15.5. PS1-1000384 was detected on June 6.60 (UT) (Coords: 17:29:21.030 +68:11:16.747 , J2000) at r=19.34 within 0.4 arcsec of the faint SDSS galaxy (J172921.00+681116.6). PS1-1000382 was detected on June 12.23 (UT) (coords: 16:04:14.084 +09:13:54.248, J2000) at g=17.9 within 0.2 arcsec of the SDSS galaxy (J160414.08+091354.0). Spectra observations at the William Herschel Telescope (+ISIS;range 320-1000nm) on Aug 1.9 (UT) show that both objects are Seyfert 1 AGN at a redshift of z=0.704 (PS1-1000384) and z=0.435 (PS1-1000382). This discovery was enabled using the PS1 System operated by the PS1 Science Consortium (PS1SC) and its member institutions, http://www.ps1sc.org/PS1_System_ATel.htm. We would like to thank the PS1 telescope operators for their support of PS1 observations.