L.M. McCauley (PSU) and A.A. Breeveld (UCL-MSSL) for the Swift team
Arimoto et al. (GCN Circ. 18228) reported the GRB detection. 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 did not observe this burst.
XRT results are not available.
The Swift/UVOT began settled observations
(Breeveld and Hagen GCN Circ. 18238) of the field of GRB 150902A 59510 s after the LAT trigger (Arimoto et al., GCN Circ. 18228).
No optical afterglow consistent with the XRT Source 1 position given in McCauley et al. (GCN Circ. 18237) 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
Figure 1. The BAT light curve is not available.
RA (J2000) | Dec (J2000) | Error | Note | Reference |
---|---|---|---|---|
1 |
-69°21'13.1" | 4.3" | XRT | McCauley et al. GCN Circ. 18243 |
Band | Authors | GCN Circ. | Subject | Observatory | Notes |
---|---|---|---|---|---|
Optical | Buckley et al. | 18234 | MASTER-SAAO optical observations | Abastumani Astro. Obs. | |
Gamma-ray | Arimoto et al. | 18228 | Fermi-LAT detection | Fermi LAT | |
Gamma-ray | Roberts and Younes | 18229 | Fermi GBM detection | Fermi GBM | Fluence=8.221±0.043x1 |
Gamma-ray | Golenetskii et al. | 18233 | Konus-Wind observation | Konus-Wind | Fluence=1.21(-0.07,+0.07)x1 |
Filter | Exp(s) | Mag | ||
---|---|---|---|---|
white | 60331 | 60972 | 631 | >21.7 |
v | 61152 | 61997 | 828 | >20.3 |
u | 59510 | 66787 | 1184 | >20.7 |
Table 3. UVOT observations reported by Breeveld and Hagen (GCN Circ. 18238). 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.
September 6, 2015