摘要： We present observations of SDF-05M05, an unusual optical transient discovered in the Subaru Deep Field (SDF). The duration of the transient is >~800 days in the observer frame, and the maximum brightness during observation reached approximately 23 mag in the i' and z bands. The faint host galaxy is clearly identified in all five optical bands of the deep SDF images. The photometric redshift of the host yields z ~ 0.6 and the corresponding absolute magnitude at maximum is 20. This implies that this event shone with an absolute magnitude brighter than -19 mag for approximately 300 days in the rest frame, which is significantly longer than a typical supernova and ultraluminous supernova. The total radiated energy during our observation was 1 x 10 super(51) erg. The light curves and color evolution are marginally consistent with some luminous IIn supernovae. We suggest that the transient may be a unique and peculiar supernova at intermediate redshift. 出版者： Bristol: IOP 出版日期： 2012-11-20 出處： Astrophysical journal. Letters, 2012-11, Vol.760 (1), p.L11-6 資源來源： Institute of Physics Journals 版權： 2014 INIST-CNRS 識別號： ISSN: 0004-637X 識別號： ISSN: 2041-8205 識別號： ISSN: 2041-8213 識別號： EISSN: 2041-8213 識別號： DOI: 10.1088/2041-8205/760/1/L11 識別號： CODEN: ASJOAB
