GCN Circular 8413
Subject
Swift UVOT observations of GRB081024B
Event
Date
2008-10-26T17:44:33Z (18 years ago)
From
Patricia Schady at MSSL/Swift <msslba@yahoo.co.uk>
P. Schady (MSSL/UCL) and C. Guidorzi (INAF-OAB) report on behalf of the Swift UVOT team.
The Swift UltraViolet/Optical Telescope (UVOT) began observations of Fermi-LAT GRB 081024B (Omodei et al., GCN Circ. 8407) 70.3 ks after the trigger.
Source 1 and Source 2 in GCN Circ. 8410 (Guidorzi et al.) are outside the UVOT field of view, and no new source is detected at the position of Source 3 (GCN Circ 8410; Guidorzi et al.) down to the following 3 sigma upper limits:
Filter Tstart(dys) Exp(s) 3-sigma UL
v 1.215 885 > 20.33
b 0.824 864 > 21.26
u 0.814 2641 > 21.42
uvw1 0.894 1531 > 21.07
uvm2 0.883 2548 > 21.36
uvw2 1.163 1201 > 21.07
The values quoted above are on the UVOT Photometric System (Poole et al, 2008, MNRAS 383,627). They are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=0.07 mag in the direction of the burst (Schlegel et al. 1998).