Detects over 100 burst candidates in SGR 1935+2154, suggesting significant activity.
Following the reports of bursting activity from SGR 1935+2154 (ATel #15667, GCN 32698, 32706, 32708), we observed the source with the Neutron star Interior Composition Explorer (NICER) on 2022 October 12 starting at 17:32:40 UTC for a total exposure time of 8.5 ks spanning 15.8 hours.Through preliminary analysis of these observations, we detect 112 burst candidates with significance higher than 7 sigma. This implies a burst rate of about 0.013 per second, an order of magnitude lower than what NICER recorded during the 2020 April burst storm from the source (Younes et al. 2020 ApJ, 904L, 21). The burst that reached the highest count rate is recorded at 17:43:11 (UTC); it has a duration of about 0.3 s and reaches a peak rate of 4.2e4 counts/s at 16 ms resolution. Assuming a blackbody model with a temperature of 3 keV, this translates to a peak flux in the 1-10 keV range of about 8.0e-7 erg/cm^2/s.
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