Back

GCN Circular 3069

Subject

GRB050215B: Late-Time Swift UVOT Observations

Date

2005-03-03T20:17:31Z (20 years ago)

From

Pete Roming at PSU <roming@astro.psu.edu>

P. Brown (PSU), S. Rosen, K. McGowan, M. De Pasquale (MSSL), P. Boyd 
(GSFC/UMBC), S. T. Holland, M. Still (GSFC/USRA), W. Landsman (GSFC), S. 
Hunsberger (PSU), A. Breeveld (MSSL), P. Roming (PSU), K. Mason, P. Schady 
(MSSL), M. Ivanushkina (PSU), T. Poole (MSSL), C. Gronwall (PSU), A. 
Blustin (MSSL), S. Koch (PSU), M. Carter, H. Huckle (MSSL),  P. Broos 
(PSU), T. Kennedy, P. Smith, B. Hancock (MSSL), M. Chester (PSU), B. Zhang 
(UNLV), J. Nousek (PSU), N. Gehrels (GSFC), on behalf of the Swift UVOT team.


The Swift Ultra-Violet/Optical Telescope (UVOT) observed the field of the 
X-ray flash GRB050215B (GCN 3024Loading...
 
 ) between February 25, 2005 and February 
28, 2005 UT.  The 5-sigma limiting magnitudes for each exposure are 
presented below.  We stress that the limiting magnitudes are based on 
ground calibrations and are uncertain by approximately +/-0.5 mag.

#                       Exposure
#   Date (UTC) Time     Time (s)  Filter   Mag
  2005-02-25  15:13:13   1670.52     V     22.2
  2005-02-25  19:52:34   2189.47     B     23.0
  2005-02-25  21:32:35   2068.95     U     22.7
  2005-02-25  23:27:38    985.24     V     21.9
  2005-02-26  02:34:31   1351.94     V     22.0
  2005-02-27  15:20:04   2099.11     B     22.9
  2005-02-28  01:07:03   1620.44     V     22.2
  2005-02-28  10:40:04   1919.99     B     22.9

We find no evidence for a brightening source, such as a supernova 
component, at the location of the afterglow seen by UKIRT (GCN 3031Loading...
 
 ).