GCN Circular 3891

J. P. Halpern (Columbia U.) reports on behalf of the MDM Observatory
GRB follow-up team:

"I observed the error box of GRB 050826 (Swift trigger #152113, GCN #3884
Not found
 
 
)
in the R band with the MDM 1.3m telescope for 75 minutes on each of two
consecutive nights.  A fading object not visible on the Digitized Sky
Survey is present at coordinates

	(J2000) 05:51:01.59, -02:38:35.4 (+/- 1")

which is 8" from the revised Swift XRT position (error radius 6", GCN #3889
Not found
 
 
).
The epochs and magnitudes are:

       ---------------------------------------------------
        Date(UT)   Time(UT)    t-t0(hours)     R(mag)
       ---------------------------------------------------
        Aug. 26   10:42-11:57   4.40- 5.65   21.0 +/- 0.2
        Aug. 27   10:43-11:58  28.42-29.67   21.6 +/- 0.2
       ---------------------------------------------------

The indicated errors are systematic at this stage of the analysis,
but the difference between the two observations is not affected by
systematics.  Improvements in precision of position and magnitudes
will be forthcoming from these data.  These preliminary magnitudes
should not be used in formal analyses.

I also note that this location suffers from significant Galactic extinction,
E(B-V)=0.59, A(R)=1.57, according to Schlegel et al. (1998)."