Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 16108

Subject
GRB 140412A: Swift/UVOT Upper Limits
Date
2014-04-14T12:46:51Z (10 years ago)
From
Stephen Holland at STScI <sholland@stsci.edu>
S. T. Holland (STScI) and V. D'Elia (ASDC) report on behalf of the
Swift/UVOT team:

    Swift/UVOT began settled observations of the field of GRB 140412A
237 s after the BAT trigger (D'Elia et al. 2014, GCNC 16097).  We do
not detect any new source consistent with the UVOT-enhanced XRT
afterglow position (Goad et al. 2014, GCNC 16100) in any of the UVOT
exposures.  Preliminary 3-sigma upper limits, using the UVOT
photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373),
for the finding chart and summed exposures are presented below.

---------------------------------------------------
Filter        TSTART     TSTOP   Exposure       Mag
---------------------------------------------------
v                393      1055         69     >19.0
b                491      6805        255     >21.0
u                466      6599        309     >20.6
uvw1             442      4815        255     >20.0
uvm2             418      4610        255     >19.6
uvw2             541      1040         58     >18.7
white            237      6811        336     >21.8
---------------------------------------------------

    The quoted upper limits have not been corrected for the expected
extinction due to the Galactic reddening along the line of sight to
this burst of E(B-V) = 0.19 mag (Schlafly et al. 2011, ApJS, 737,
103).
Looking for U.S. government information and services? Visit USA.gov