E. Troja (NASA/GSFC/UMCP) for the Swift team
At 17:19:20 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191001B (trigger=927345) (Troja et al. GCN Circ. 25902). Swift did not slew due to targets with higher priority. At the time of the trigger, the initial BAT position was 100° from the Sun (6.7 hours West) and 132° from the 12%-illuminated Moon. Table 1 contains the best reported positions from Swift.
Table 2 is a summary of GCN Circulars about this GRB from observatories other than Swift.
Standard analysis products for this burst are available at https://gcn.gsfc.nasa.gov/swift_gnd_ana.html.
As reported by Palmer et al. (GCN Circ. 25930),
the BAT ground-calculated position is RA, Dec = 86.423, -15.880 deg which is RA(J2000) = 0
The mask-weighted light curve (Figure 1) shows a multi-peaked structure that starts at ~T-10 s and ends at ~T+130 s.
The time-averaged spectrum from T-8.77 to T+126.11 s is best fit by a simple power-law model.
The power law index of the time-averaged spectrum is 1.58 ± 0.11.
The fluence in the 15-150 keV band is 4.6 ± 0.3 x 1
The results of the batgrbproduct analysis are available at https://gcn.gsfc.nasa.gov/notices_s/927345/BA/.
XRT refined results are not available.
UVOT results are not available.
Figure 1. The BAT
mask-weighted light curve in the four individual and total
energy bands. The units are counts
RA (J2000) | Dec (J2000) | Error | Note | Reference |
---|---|---|---|---|
0 |
-15°52'48.3" | 3.6' | BAT-refined | Palmer et al. GCN Circ. 25930 |
Band | Authors | GCN Circ. | Subject | Observatory | Notes |
---|---|---|---|---|---|
Optical | Murata et al. | 25906 | MITSuME Akeno optical upper limits | MITSuME Akeno | upper limits |
Optical | Strausbaugh and Cucchiara | 25940 | Optical Upper Limits with LCO | LCO | upper limits |
October 4, 2019