As the first detection of Gravitation Wave (GW) event arising from the coalescence of two stellar-mass Black Holes (BH) was announced by LIGO. a new era for astronomy began. Searches for electromagnetic (EM) counterparts of GW events is of fundamental importance. as they increase the confidence in the GW detection and help characterize the parameters of the merger. https://fitnessgravesyardes.shop/product-category/seat-pulley-set/