GCN Circular 19055
An error was introduced in the last circular on the absolute magnitude corresponding to our observations of GW 150914. The absolute magnitude limit is -19.6. Below the corrected circular: A. Klotz (IRAP, CNRS/UPS), and M. Boer (ARTEMIS, CNRS/OCA/UNS) report on behalf of the TZAC collaboration: We have reduced and analysed the whole set of images acquired from TAROT-Chile (see LV GCN 18348, 18332 for the field coordinates and observing log). Depending on the field, the final limits are between R >18.5 and 19.8. If we take a conservative limit of R> 18.5 at 2.8 days after the GW event, this corresponds to an absolute magnitude of -19.6 at the distance of GW 150914.