GCN Circular 3820
Subject
GRB050817: Negative Optical Observations
Event
Date
2005-08-17T15:35:14Z (20 years ago)
From
Aaron Price at AAVSO <aaronp@aavso.org>
P. Nelson (Ellinbank Observatory - Ellinbank, Australia) and A. Price (AAVSO) report on
behalf of the AAVSO International High Energy Network on optical observations of GRB050817
(GCN #3819; Fox et al.).
No counterpart is detected to less than Rc=16. The observation covered the entire error
pattern and the exposure midpoint was 14:18 UT. Full details and URL to the FITS image are
below.
The AAVSO thanks the Curry Foundation for support of the AAVSO International High Energy
Network.
Report filed on Wed Aug 17 11:22:17 2005:
Name: Peter Nelson
email: pnelson@dcsi.net.au
Observer: Peter Nelson
Site: Ellinbank Observatory
Location: Ellinbank
LatitudeLongitude: -38 14 47.4 / 145d 57' 30.4"E
Elevation: 138m
Scope: 0.32m Newtonian
ScopeFocalRatio: f/5
CCDVendor: SBIG, ST8XE
CCDDetector: KAF 1602E
CCDSize: 498 x 468
CCDPixelScale: 1.16 arc"
CCDFOV: 9.6 x 9
Object: 050817
ObsDate: 050817
ObsMidPointTime: 14:18
TimePerFrame: 100
NumberOfFrames: 1
Filters: R
Processing: dark, flat
Seeing: 5 arc"
LimitingMag: 16
Sky: Moon, cloud
afterglowmag:
afterglowerr:
compstars:
Report: Error box covered.
comments: Gap in cloud. Did not get time to focus properly. Moon light interferred with
observation. Only one exposure possible before cloud came over. A FITS image has been
uploaded to ftp://ftp.aavso.org/grb/PeterNelson_050817_2453600.14047_.fits