iPTF Independent Discovery and Classification of the SN Candidate in NGC 4134 (PSN J12091154+2910209/iPTF14aoi) as a young SN II
ATel #6095; I. Arcavi (LCOGT/KITP). A. Gal-Yam (Weizmann), M. M. Kasliwal (Carnegie) and Y. Cao (Caltech) on Behalf of the iPTF Collaboration
on 24 Apr 2014; 15:35 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Iair Arcavi (iarcavi@lcogt.net)
Subjects: Optical, Supernovae
The iPTF (ATel #4807) reports the independent discovery and classification of PSN J12091154+2910209 (ATel #6093) as iPTF14aoi.
iPTF14aoi was discovered on an image obtained 2014 April 24 07:26 (UT dates and times used throughout) at m_R = 18.04+/-0.03 mag (corresponding to M_R = -15.49 at the redshift of NGC 4134). Upon inspection of iPTF observations from previous nights, we find that the SN is detected on 2014 April 22 08:14 at m_R = 20.08 +/- 0.17 and is not detected on the same date at 04:27 down to a 3-sigma limiting magnitude of m_R = 20.85.
Starting 2014 April 24 09:50, we obtained a target of opportunity spectrum with the GMOS spectrograph mounted on the Gemini-North telescope. The spectrum shows a hot, blue continuum with signs of Balmer emission and weak, broad He II (4686 Ang). We classify this is as a young Type II supernova consistent with the redshift of NGC 4134.
We thank the Gemini staff for rapidly executing this ToO.
