GCN Circular 3535
Subject
GRB 050607: PROMPT VRcIc Observations
Event
Date
2005-06-08T00:25:17Z (20 years ago)
From
Melissa Nysewander at UNC,Chapel Hill <mnysewan@astro.unc.edu>
M. Nysewander, D. Reichart, J. A. Crain, A. Foster, M. Bayliss report on
behalf of the UNC team of the FUN GRB Collaboration:
We observed the BAT localization of GRB 050607 (Retter et al., GCN 3525)
with PROMPT beginning 13m 30s after the burst.
We do not detect a source within the refined XRT localization (Pagani et
al., GCN 3528) nor the source identified by Rhoads (GCN 3527).
3-sigma limiting magnitudes are based on 10 USNO-B1.0 stars for Rc and Ic
observations and 10 NOMAD stars for V observations. Initial limiting
magnitudes are poor due to a camera cooling error:
Mean Time Integration Filter Limiting Telescope
Since GRB Time Magnitude
14m 08s 1 x 77.5s Ic 17.5 PROMPT-5
17m 43s 2 x 77.5s V 18.4 PROMPT-5
21m 16m 1 x 77.5s Rc 19.7 PROMPT-5
24m 06s 1 x 77.5s Ic 19.2 PROMPT-5
26m 21s 2 x 77.5s V 19.5 PROMPT-5
29m 51s 3 x 76.25s Rc 20.5 PROMPT-5
36m 17s 4 x 76.25s Ic 20.2 PROMPT-5
41m 48s 3 x 76.25s V 19.4 PROMPT-5
47m 17s 2 x 76.25s Rc 20.3 PROMPT-5
51m 25s 1 x 76.25s Ic 19.4 PROMPT-5
Stacking all images yields 3-sigma limiting magnitudes of Ic > 20.5, Rc >
21.2, and V > 19.8.
PROMPT is still being built and commissioned.