Gotz et al. (GCN Circ. 15510) reported the GRB detection. a gamma ray burst lasting about 70 s has been detected by IBAS in the IBIS/ISGRI data at 21:25:01 U.T. 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.
BAT results are not available.
We have analysed 7.9 ks of XRT data for the INTEGRAL-detected burst: GRB 131122A, from 13.7 ks to 689.7 ks after the INTEGRAL trigger. The data are entirely in Photon Counting (PC) mode. An X-ray source is detected within the INTEGRAL error circle. The source has a mean count rate of 2.3 x 10-3 ct s-1; we cannot determine at the present time whether it is fading.
The results of the XRT team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00020328.
The Swift/UVOT began settled observations of the field of GRB 131122A 13578 s after the INTEGRAL trigger (Gotz et al., GCN Circ. 15510) (Swenson and Maselli GCN Circ. 15515). No optical counterpart consistent with the potential XRT afterglow position (Maselli et al., GCN Circ. 15513) is detected in the initial UVOT exposures. Table 3 gives preliminary magnitudes using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc., 1358, 373). No correction has been made for the expected extinction in the Milky Way corresponding to a reddening of EB-V of 0.01 mag. in the direction of the GRB (Schlegel et al. 1998).
Figure 1. The BAT light curve is not available.
Figure 2. The XRT light curve.
Any data from a cross-hatched region are not included in the fit.
RA (J2000) | Dec (J2000) | Error | Note | Reference |
---|---|---|---|---|
10h10m10.12s | +57°43'39.7" | 4.8" | XRT-final | UKSSDC |
10h10m10.12s | +57°43'39.7" | 4.8" | XRT | Maselli and D'Elia GCN Circ. 15513 |
Band | Authors | GCN Circ. | Subject | Observatory | Notes |
---|---|---|---|---|---|
Optical | Gorbovskoy et al. | 15509 | (INTEGRAL trigger N6392): MASTER-NET optical observation |
MASTER | upper limits |
Optical | Xu et al. | 15511 | Nanshan optical upper limit | Xinjiang Astro.Obs. | upper limits |
Optical | Gorosabel et al. | 15512 | i-band observations from NOT | NOT | |
Optical | de Ugarte Postigo et al. | 15514 | Upper limit from NOT imaging | NOT | upper limits |
Gamma-ray | Gotz et al. | 15510 | a long GRB detected with INTEGRAL | INTEGRAL | detection |
Filter | Tstart(s) | Tstop(s) | Exp(s) | Mag |
---|---|---|---|---|
white | 14302 | 20578 | 855 | >21.3 |
v | 20830 | 21061 | 227 | >19.0 |
u | 13578 | 20136 | 1375 | >21.0 |
Table 3. UVOT observations reported by Swenson and Maselli (GCN Circ. 15515). The start and stop times of the exposures are given in seconds since the BAT trigger. The preliminary 3-σ upper limits are given. No correction has been made for extinction in the Milky Way.