GCN Circular 21697
M. Jauzac (Durham), G. P. Smith (Birmingham), J. Richard (Lyon), M. Bianconi (Birmingham), C. P. L. Berry (Birmingham), W. M. Farr (Birmingham), R. Massey (Durham), A. Robertson (Durham), K. Sharon (Michigan), A. Vecchio (Birmingham), J. Veitch (Glasgow) The Gravitationally-lensed Gravitational Wave Hunters collaboration report observations of strong-lensing galaxy clusters located within the sky localisation of the LIGO/Virgo trigger G296853 (LVC GCN Circ. 21413). Following Smith et al. (arXiv:1707.03412) we searched the skymap for strong-lensing galaxy clusters that lie within the 90% credible sky localisation. Abell 2895 was the closest strong-lensing galaxy cluster to the peak probability in the skymap. We observed this cluster with MUSE on VLT on the nights of August 9, 14, and 16. MUSE spans a 1x1 arcminute field of view with a wavelength range of 4650-9300 Angstroms. Analysis of these data is ongoing. Colleagues with complementary data are welcome to contact us with a view to collaboration. We thank the staff at ESO for their outstanding support of our observing programmes.