GCN Circular 7702
Subject
GRB080507: Swift/UVOT followup observations
Event
Date
2008-05-09T14:02:51Z (18 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. A. Breeveld (MSSL/UCL) and W. H. Baumgartner (GSFC/UMBC)
on behalf of the Swift/UVOT team.
The Swift Ultra-Violet/Optical Telescope (UVOT) started a ToO
observation of GRB 080507 (Lapshov et al., GCN Circ. 7697) 109312s
after the AGILE trigger. At the position of the afterglow candidate
seen in the Tautenburg telescope (Kann et al. GCN Circ. 7701), which
also corresponds to the brightest source in the Swift XRT (V. Mangano
et al. GCN Circ. 7699), the UVOT has a very faint source that does not
appear in DSS or SDSS. It is only detectable in summed white images,
but does NOT appear to be fading.
The limiting magnitudes for the initial exposure and detections in
summed images are as follows:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 109312 109526 211.4 >21.3 (UL)
white 109312 111881 2462.3 22.6 +/- 0.4 (3 sig)
white 111881 116511 1355.3 22.1 +/- 0.3 (3.8 sig)
The values quoted above are in the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) and are not corrected for galactic
reddening.