We do not detect any significant counterparts and estimate a 3-sigma upper limit on the 75-2000 keV fluence of 5.2e-07 erg/cm^2 for a burst lasting less than 1 s with a characteristic short GRB spectrum (an exponentially cut off power law with alpha=-0.5 and Ep=600 keV) occurring at any time in the interval within 300 s around T0. For a typical long GRB spectrum (Band function with alpha=-1, beta=-2.5, and Ep=300 keV), the derived peak flux upper limit is ~4.7e-07 (1.7e-07) erg/cm^2/s at 1 s (8 s) time scale in 75-2000 keV energy range.
|Publication date||25 Feb 2019|
|Number of pages||1|
|Publication status||Published - 25 Feb 2019|