TITLE: GCN CIRCULAR NUMBER: 18549 SUBJECT: LIGO/Virgo G194575: LT Spectroscopy of iPTF candidates DATE: 15/11/01 09:55:02 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: Observations of 7 of the proposed iPTF candidates (GCN 18497) using the�� SPRAT spectrograph of the 2.0 metre Liverpool Telescope (La Palma)��have been obtained. �� The spectral ��resolution was R~350 and the wavelength range 4000 - 8000 Angstroms. iPTF-15dln was observed��on 2015-10-28 at 00:24UT. ��The transient can not be obviously�� distinguished��from the host��galaxy in our acquisition images. ��Our spectrum shows��absorption�� lines of the host galaxy with��redshift z=0.051. iPTF-15dkk was observed��on 2015-10-28 at 20:34UT. ��The transient can not be obviously�� distinguished��from the host��galaxy in our��acquisition images. ��Our spectrum shows��absorption�� lines of the host galaxy with��redshift z=0.061. iPTF-15dkn was observed��on 2015-10-28 at 21:09UT. ��The transient can not be distinguished from the host��galaxy in our��acquisition images.�� Our spectrum shows��absorption lines of the�� host galaxy with��redshift z=0.074. iPTF-15dkm was observed��on 2015-10-28 at 21:41UT. ��Our spectrum shows broad H-alpha�� emission and is consistent with a Supernova as reported in GCN 18536. �� iPTF-15dmn was observed��on 2015-10-28 at 22:15UT. ��Our spectrum shows narrow emission�� line features typical of an AGN at redshift z=0.056. iPTF-15dni was observed��on 2015-10-28 at 23:08UT. ��The spectrum shows��weak H-alpha emission�� and typical galaxy absorption lines. ��Both the H-alpha emission and the absorption spectra��have�� redshift z=0.020. iPTF-15dnh was observed��on 2015-10-29 at 01:16UT. ��The transient can not be obviously�� distinguished��from the host��galaxy in our��acquisition images. ��Our spectrum shows��absorption�� lines of the host galaxy with��redshift z=0.056. Further��analysis is ongoing. DisclaimerNone��