GCN Circular 1998

GRB030329: Upper limits from recent and historical observations.

W. M. Wood-Vasey, P. Nugent, and B. C. Lee, Lawrence Berkeley National
Laboratory, using images obtained by R. Bambery, S. Pravdo, M. Hicks,
and K. Lawrence (Near-Earth Asteroid Tracking project, Jet Propulsion
Laboratory), report recent and historical upper limits for the optical
transient for GRB 20030329 (GCN #1985, 1986, 1987) using the position
of Uemura et. al (GCN #1949) from images taken with the Palomar Oschin
1.2-m and Haleakala MSSS 1.2-m telescopes during the previous two
years:
 
                           Limiting Unfiltered Mag                  
UT Date                          ( @ S/N = 3)          Telescope
--------------------------------------------------------------------
2001 Mar 13.60, 13.61              [ 17.58            Haleakala
2002 Jan  8.46,  8.47,  8.49       [ 20.31            Haleakala
2002 Jan 14.44, 14.45, 14.46       [ 20.26            Haleakala
2002 Jan 21.46, 21.47, 21.48       [ 21.66              Palomar
2002 Feb  3.54,  3.55,  3.57       [ 20.86              Palomar
2002 Feb 13.56, 13.57              [ 18.96              Palomar
2002 Apr  1.27,  1.29,  1.31       [ 21.57              Palomar
2003 Jan 18.50, 18.52, 18.54       [ 20.84              Palomar
2003 Feb 23.50, 23.51, 23.52       [ 20.54            Haleakala
2003 Mar  1.51,  1.52,  1.53       [ 19.89            Haleakala
2003 Mar 23.13, 23.15, 23.17       [ 21.61              Palomar

Magnitudes are calibration against 300 USNO-A V1.0 R-band stars in
the 0.25 sq. degree field of the images.

A co-addition of these images shows nothing at this location to a
combined limiting magnitude of 22.28 (S/N = 3).

The co-addition is available at:

http://supernova.lbl.gov/~wwoodvas/GRB/#GRB20030329

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