GCN Circular 12369
Subject
GRB 110918A optical observation
Date
2011-09-20T16:36:08Z (14 years ago)
From
AAVSO GRB Network at AAVSO <matthewt@aavso.org>
Arto Oksanen (Hankasalmi Obs., Hankasalmi, Finland), Caisey Harlingten
(Harlingten Observatory, San Pedro de Atacama, Chile), Bradley Schaefer
(LSU), and Matthew Templeton (AAVSO) report the following follow-up
optical observation of the error box of GRB 110918A (Hurley et al., GCN
Circ. #12357):
A. Oksanen (Hankasalmi Obs., Hankasalmi, Finland) reports an observation
of the error box of the intense, long GRB 110918A (Hurley et al., GCNC
#12357; Golonetskii, et al., GCNC #12362) using the Harlingten Observatory
0.5-m Planewave telescope with Apogee Alta-U42D9 CCD located in San Pedro
de Atacama, Chile. Ten, 60-second unfiltered observations of the field
containing the GRB error box were made; the coadded image has a midpoint
time of 2011 Sep 20 07:33 UT (JD 2455824.8146), approximately 34 hours
post burst. We find the point source detected by Mangano et al. (GCNC
#12364) and Tanvir et al. (GCNC #12365) at a preliminary magnitude of
R=19.0 measured relative to the nearby USNO-A2.0 star 0600-00854967
(B=18.8,R=17.7).
Coadded images of the field are available at the following links:
FITS: http://pilvi.dyndns.org/arto/GRB110918A_median.fit
JPEG: http://pilvi.dyndns.org/arto/GRB110918A_median.jpg
The AAVSO International High Energy Network was made possible through
grants from the Charles Curry Foundation and from NASA, and is supported
through the AAVSO Endowment.