GCN Circular 6218
Subject
Short-Hard GRB 070209: PROMPT Observations
Date
2007-03-19T22:10:03Z (18 years ago)
From
Seth Johnson at U.North Carolina <spjohnso@physics.unc.edu>
S. Johnson, D. Reichart, J. Haislip, M. Nysewander, A. LaCluyze, K.
Ivarsen, J. A. Crain, A. Foster and A. Trotter report on behalf of the
University of North Carolina:
Skynet observed the localization of short-hard GRB 070209 (Sato et al., GCN
6086) with one of the 16" PROMPT telescopes at CTIO beginning 67 seconds
after the burst in BVIR.
Our images include nearly all of the BAT error circle, as well as all three
X-ray sources of Stratta et al. (GCN 6095). No new source is detected
within this region to the following 3-sigma limiting magnitudes:
Filter Mean Time Integration Limiting Calibration
Since GRB Time (sec) Magnitude Stars*
B 0:01:12 10 16.07 1-3
V 0:01:39 10 16.83 1-4,7
R 0:02:11 20 17.33 9-12
I 0:02:49 20 17.24 9-12
B 0:03:27 10 16.27 1-4
V 0:04:11 40 18.08 1-6
R 0:05:16 40 17.94 9-14
I 0:06:13 40 17.68 9-12,15
B 0:07:35 80 18.17 1-6
V 0:09:14 80 18.57 1-6
R 0:10:57 80 18.62 9-15
I 0:12:36 80 18.26 9-14
B 0:14:44 120 18.82 1-6
V 0:17:28 120 19.12 1-6
R 0:20:14 120 18.81 9-14
I 0:23:00 120 18.66 9-15
B 0:25:43 120 18.41 1-6
V 0:29:33 240 19.36 1-6
R 0:34:34 240 19.19 9-14,16
I 0:40:19 240 18.64 9-14,16
B 0:45:45 240 18.41 1-6
V 0:51:06 240 19.37 1-2,4-6
R 0:58:55 560 19.77 9-10,12-14,16
I 1:10:51 560 19.32 9-10,12-14,16
B 1:21:29 480 19.09 1-2,4-7
V 1:33:25 560 19.72 1-2,4-8
*We calibrated the field in B and V using stars from the NOMAD catalog and
in R and I using stars from the USNO-B1.0 catalog. The NOMAD calibration
stars are (1) 0426-0037919, (2) 0426-0037965, (3) 0425-0038295, (4)
0425-0038481, (5) 0425-0038222, (6) 0426-0037846, (7) 0427-0037455 and (8)
0426-0038099. The USNO-B1.0 calibrations stars are (9) 0426-0037895, (10)
0426-0037941, (11) 0425-0038287, (12) 0425-0038472, (13) 0425-0038213, (14)
0426-0037820, (15) 8058-00193-1 and (16) 0426-0038075.