Fig. 1.

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Localisation of GRB 220627A. Left: 50% and 90% uncertainty regions for both GBM triggers associated with GRB 220627A are outlined in purple. A total of 52 MeerLICHT fields (grey boxes) were automatically scheduled for observations immediately following the first trigger. Following the announcement of the Fermi/LAT localisation region (red circle), two MeerLICHT fields (orange boxes) were scheduled for observations the following night. Top right: Swift/XRT ToO observations identified 15 X-ray sources within the LAT error box. MeerLICHT identified a new optical transient within the error box of the third ‘good’ XRT source (yellow diamond). Bottom right: first MeerLICHT detection of the new transient (left), and an archival image taken two months previously on 2022 April 26 (right). Both thumbnails are 1′×1′ in dimension.
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