Electronic Telegram No. 4188
Central Bureau for Astronomical Telegrams
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Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2015an IN IC 2367 = PSN J08241502-1846281
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (mag 15.2) on several unfiltered CCD
images taken with a 30-cm RCX4000 telescope (+ SBIG ST8-XME camera) at his
Klein Karoo Observatory on Sept. 13.15 UT.  The new object is located at R.A.
= 8h24m15s.02, Decl. = -18d46'28".1 (equinox 2000.0), which is 71" east and
4" north of the center of the type-SBb galaxy IC 2367.  The variable was
designated PSN J08241502-1846281 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2015an based on the spectroscopic
confirmation reported below.  Additional CCD magnitudes for 2015an:
Aug. 22.168, [18.5 (Monard); Sept. 15.791, 15.9 (J. Brimacombe, Cairns,
Australia; position end figures 15s.07, 28".4; image posted at website URL
https://www.flickr.com/photos/43846774@N02/21460420045/); 21.100, 15.1
(Monard); 24.140, 15.0 (Monard); Oct. 4.118, 15.1 (Monard); 6.121, 15.1
(Monard); 8.115, 15.2 (Monard); 13.108, 15.3 (Monard); 17.100, 15.3 (Monard);
18.108, 15.3 (Monard); 25.103, 15.5 (Monard); Nov. 8.083, 15.6 (Monard);
17.094, 15.7 (Monard).

     G. Hosseinzadeh, S. Valenti, I. Arcavi, D. A. Howell, and C. McCully,
Las Cumbres Observatory Global Telescope Network and University of California
at Santa Barbara, report that a spectrogram of PSN J08241502-1846281 = SN
2015an, obtained on Sept. 26.7 UT with the robotic FLOYDS instrument (range
320-1000 nm, resolution 2 nm) mounted on the "Faulkes Telescope South" at
Siding Spring Observatory, Australia, shows it to be a peculiar type-II
supernova.  They find a broad H-alpha P-Cyg profile superimposed on a blue
continuum.  The blue continuum is unusual for a supernova two weeks post-
maximum, as is the relatively low H-alpha expansion velocity (about 5000 km/s
measured at the proposed host galaxy redshift of z = 0.008; Theureau et al.
1998, A.Ap. Suppl. 130, 333; via NED).  Swift ToO observations of this source
have been requested.  Further follow-up is encouraged.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2015 CBAT
2015 November 18                 (CBET 4188)              Daniel W. E. Green