TITLE: GCN CIRCULAR NUMBER: 18573 SUBJECT: LIGO/Virgo G194575: Liverpool Telescope observations of iPTF-15dld and iPTF-15dni DATE: 15/11/10 11:35:56 GMT FROM: Iain Steele at Liverpool/JMU I.A. Steele, C.M. Copperwheat, A.S. Piascik (Liverpool JMU) report on behalf of a larger collaboration: We report Liverpool Telescope (La Palma) observations of iPTF-15dld and iPTF-15dni. SPRAT Spectroscopy and IO:O broad band optical photometry of iPTF-15dld was obtained on the night of 2015-11-06.  Interpolating over the host galaxy emission lines in the spectrum reveals a continuum with broad emission features.  With the data to hand we are not confident in subtraction of the host galaxy continuum from that of the transient.  The spectrum is broadly consistent with the identification made as a Type Ic broad line supernova in GCN18632 but we are not able to constrain the redshift or age.  Depending on observation priorities we may schedule some further spectroscopy and photometry at later times. SPRAT Spectroscopy and IO:O redshifted H-alpha optical imaging of iPTF-15dni was obtained on the night of 2015-11-05.  Comparison of the spectrum with our earlier spectrum obtained on 2015-10-28 and reported in GCN18549 shows no significant change in the H-alpha emission line.  Our H-alpha images show the galaxy has many apparent star forming regions, although we can not resolve the location of the  transient in H-alpha from the galaxy core without a reference image at this time.    Depending on observation priorities we may schedule some further spectroscopy  and photometry at later times. DisclaimerNone