[AAVSO-HEN] GRB 090530A: Skynet/DSO Detections

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  10015
SUBJECT: GRB 090530A: Skynet/DSO Detections
DATE:    09/10/11 21:25:05 GMT
FROM:    Aaron LaCluyze at U.North Carolina  <lacluyze at 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.