TITLE: GCN CIRCULAR NUMBER: 18498 SUBJECT: LIGO/Virgo O1 extended until January 12 DATE: 15/10/27 21:11:08 GMT FROM: Joseph A. Giaime at LIGO Upon the recommendation of the LIGO/Virgo Joint Run Planning Committee (JRPC), LIGO's Observation Run 1 (O1) has been extended until January 12, 2016, 8 AM PST, 10 AM CST, 1600 UTC.