[vsnet-grb-info 5554] GRB 080121: Swift/UVOT upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7217
SUBJECT: GRB 080121: Swift/UVOT upper limits
DATE:    08/01/25 14:06:29 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara at astro.psu.edu>

A. Cucchiara (PSU), P. Schady (MSSL)
report on behalf of the Swift-UVOT team:

The Swift/UVOT observed the field of GRB080121 (trigger #301491)
starting 2.3 days after the BAT detection (J. R. Cummings et
al. 2008, GCN Circ. 7209). We do not find any new source in any
of the UVOT coadded observations inside the BAT error circle.

The 3-sigma upper limits (in the UVOT photometric system,
Breeveld et al., GCN Circ. 6614) are listed.

Filter     Tstart        Exp    Magnitude  
                         (s)
white       2.3 days     2015    >22.25
v           2.3 days     2268    >20.73
uvm2        3.4 days     1491    >21.13

The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.02  mag in the
direction of the burst (Schlegel et al. 1998).