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On October 6, 1997 at 05:16:57.44 UTC (Oct 5, 21:16:57.44 PST) BATSE detected GRB 971006 (Trig. 6414). LOTIS received the Original GCN coordinates of RA=241.14°, Dec=49.23° at 05:17:06.6 UTC, approximately 9.2 seconds after the trigger. After slewing to the coordinates (~7.9 s) LOTIS began imaging the Original GRB position at 05:17:14.5 UTC, just 17.1 seconds after the BATSE trigger.

GRB 971006 Light Curve

The plot above illustrates the LOTIS response time to GRB 971006. The BATSE light curve ( > 20 keV) shows the burst with a duration of ~150 s. The grey area represents the integration time (10.0 s) of the first LOTIS image. LOTIS began imaging during prompt gamma-ray emission and continued to image the area for the remainder of the night.

GRB 961006 Coverage Plot

The plot above illustrates the LOTIS coverage of the Final BATSE error circle centered at RA=249.79°, Dec=53.29°, approximately 6.8° from the Original coordinates. The inner and outer ellipses represent the BATSE 1-sigma (0.6° statistical and 1.9° systematic errors) and 3-sigma error circles. The narrow arc represents the IPN annulus calculated using data from the BATSE and Konus instruments. The annulus is centered at RA=166.838°, Dec=15.53° and has a radius and width of 74.162° and 0.051° respectively. The pseudo-rectangles represent the area covered by the LOTIS cameras and each of the dots is a stellar object detected by the system.

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