------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 3099 2015 Aug 20 15.07UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- SUPERNOVA 2015I IN NGC 2357 (TOSHIHIDE NOGUCHI) 2015I May 2.48 07 17 45.70 +23 20 40.6 15.7 65.9"E 42.6"S The type-IIP supernova 2010bj also appeared in NGC 2357 (cf. CBET 2230). T. Nakaoka et. al., Hiroshima University and others obtained a low-resolution optical spectrum on May 4.5 UT with the 1.5-m Kanata telescope. The spectrum shows absorption lines of Fe II multiplets, Si II 635.5-nm, and the Ca II near-infraredtriplet, suggesting that this is a type-Ia supernova then in its early phase. CBET 4106 SUPERNOVA 2015J (SCALZO ET. AL.) 2015J Apr 27.88 07 35 05.18 -69 07 53.1 19.3r M. Childress et. al. report on spectroscopy of June 24.8 UT with the Wide Field Spectrograph on the ANU 2.3-m telescope at Siding Spring. A 20-min spectrogram is consistent with that of a type-IIn supernova such as 2010mc. CBET 4115 issued 2015 July 6 SUPERNOVA 2015K IN NGC 7712 (KOICHI ITAGAKI) 2015K Apr 25.78 23 35 52.26 +23 36 52.1 16.3 8.4"E 15.2"S T. Nakaoka et. al., Konan University, obtained a low-resolution optical spectrogram on Apr. 26.8 UT with the 1.5-m Kanata telescope suggesting that this is a type-Ic supernova. CBET 4116 issued 2015 July 6 SUPERNOVA 2015L (ASA-SN) 2015L Jun 8.36 22 02 15.45 -61 39 34.6 17.0 0.4"E 0.1"S Spectroscopic follow-up was obtained on June 21 UT with the du Pont 2.5-m telescope at Las Campanas Observatory, on June 30 and July 7 with the SALT 10-m telescope, on June 24 with the SOAR 4-m telescope (+ Goodman instrument) at Cerro Pachon, and on July 6 with the Clay 6.5-m telescope (+ MagE) at Las Campanas Observatory. All of the spectra characteristic of hydrogen-poor super-luminous supernovae -- SLSN-I (prototype supernova 2005ap; see the review by Gal-Yam 2012, Science 337, 927 for the classification). CBET 4140 issued 2015 July 24 Guy M Hurst