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GCN Circular 2379

Subject
XRF030824: Optical observations
Date
2003-09-04T18:42:16Z (21 years ago)
From
Arto Oksanen at Nyrola Obs., Finland <oksanen@nyrola.jklsirius.fi>
A. Oksanen on behalf of the Nyrola Observatory GRB Team
and the AAVSO International High Energy Network reports:

Total of five 24 x 16 arcmin fields covering most of the HETE WXM error
circle of XRF030824 (HETE 2821) was imaged with the 0.4m SCT at the
Nyrola Observatory starting at August 24, 2003 20:40 UT, 4.0 hours after 
the inital burst under varying sky conditions (some clouds and haze).
 
Total of 22 240s Rc-exposures were combined and compared to
the Digitized Sky Survey (DSS2R). 

No new objects were found to the image limits of R = 17.5 - 19.0. 

Field        mid UT    exposure   limiting R mag
------------------------------------------------ 
XRF030824     20:50    5 x 240s       19.0
XRF030824NE   21:15    3 x 240s       18.5
XRF030824NW   21:35    5 x 240s       17.5 (clouds)
XRF030824SE   22:01    5 x 240s       19.0
XRF030824SW   22:24    4 x 240s       19.0
------------------------------------------------ 

The final combined images are available on the web with an image
showing the error circle and the sky coverage of each field:
http://nyrola.jklsirius.fi/grb/xrf030824/

The AAVSO International High Energy network is grateful for a 
generous grant from the Curry Foundation and to NASA for the 
financial support for the High Energy Workshops for Amateur 
Astronomers.
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