[AAVSO-HEN] GRB 080503: Further HST imaging

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  7749
SUBJECT: GRB 080503: Further HST imaging
DATE:    08/05/19 03:17:20 GMT
FROM:    Daniel Perley at U.C. Berkeley  <dperley at astro.berkeley.edu>

D. A. Perley (UC Berkeley), J. S. Bloom (UCB), A. J. Levan (U. Warwick), 
W. Li (UCB), N. R. Tanvir (U. Leicester), N. R. Butler (UCB),  H-W. Chen 
(U. Chicago), R. Chornock (UCB), J. X. Prochaska (UCO/Lick), C. D. 
Bailyn (Yale), A. Bunker (U. Exeter), R. Chornock (UCB), B. Cobb (Yale), 
P. B. Hall (York U.), A. V. Filippenko (UCB), N. Gehrels (NASA/GSFC), K. 
Glazebrook (Swinburne), J. Granot (U.  Hertfordshire), K. C. Hurley 
(UCB), D. Kocevski (UCB), B. Metzger (UCB),  M. Modjaz (UCB), A. Miller 
(UCB), W. Lee (I. de Astronomia), S. Lopez (U. Chile), J. Norris 
(NASA/Ames), P. E. Nugent (LBNL), M. Pettini (U. Cambridge), D. 
Poznanski (UCB), A. L. Piro (UCB), E. Quataert (UCB), E. Ramirez-Ruiz 
(UCSC), J. Shiode (UCB), and T. Sakamoto (GSFC/UMBC) report:

Further to GCN 7703 (Bloom et al.), we obtained additional imaging using 
the Hubble Space Telescope (+WFPC2) of GRB 080503 (Mao et al., GCN 7665) 
starting at 15:05:05 on UT 2008-05-12, about 9.2 days after the trigger. 
Four exposures of 1000s each were acquired in F606W and in F814W.

The afterglow has faded significantly since the previous HST epoch, and 
is not detected in either filter, or in a combined stack of the imaging 
from both filters.  The approximate limiting magnitude is F606W(AB) > 
28.0, confirming the rapid fading observed previously.  No sign of 
host-galaxy emission is present in either filter.