GRB 090530A
GCN Circular 9439
Subject
GRB 090530A: ROTSE-III Detection of Optical Counterpart
Date
2009-05-30T03:30:24Z (16 years ago)
From
Heather Flewelling at IfA/Hawaii <flewelling.heather@gmail.com>
H. Flewelling (IfA), B. E. Schaefer (Louisiana State), Shashi Pandey (UMich)
report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 090530A
(Swift trigger 353567). The first image was at 03:18:35.8 UT, 17.4 s after
the burst (6.8 s after the GCN notice time). The unfiltered images are
calibrated relative to USNO A2.0. We detect a new object, not visible in the
DSS (second epoch), with coordinates:
11:57:40.5 +26:35:37.9 (J2000), with positional uncertainty of
1" or better
start UT mag mlim(of image)
----------------------------------
03:18:42.7 16.0 16.2
A jpeg image is available at
http://www.rotse.net/images/gsb353567_3b00_img.jpg Note that the object
marked 48 is the candidate in question.
Continuing observations are in progress.
GCN Circular 10015
Subject
GRB 090530A: Skynet/DSO Detections
Date
2009-10-11T21:25:05Z (16 years ago)
From
Aaron LaCluyze at U.North Carolina <lacluyze@physics.unc.edu>
A. Smith, A. LaCluyze, D. Reichart, D. Caton, L. Hawkins, J. Haislip, K.
Ivarsen, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, A. Trotter, J.
A. Crain, and M. Nysewander report:
Skynet observed the Swift/BAT localization of GRB 090530A (Cannizzo et al., GCN
9438) with the 14" Dark Sky Observatory telescope in North Carolina beginning
61.8 minutes after the trigger in RI.
We detect the afterglow (Cannizzo et al., GCN 9438). Stacking only images that
increase the limiting magnitude yields:
mean 1-sig. 1-sig.
time sys. stat.
since cal. cal. cal.
trig. tel. exp. fil. magnitude stars* unc. unc.
(m) (# x s) (mag) (mag)
88.8 DSO-14 20 x 80 I 19.26 +0.32 -0.25 7 SDSS 7 0.050 0.001
102.2 DSO-14 23 x 80 R 19.53 +0.16 -0.14 10 SDSS 7 0.022 0.001
* Transformed using Jester et al., 2005, ApJ, 130, 873.