[vsnet-alert 7547] GRB021004 follow up at Bronberg

["B Monard" <BMonard@mweb.co.za>]

Hi,

last night under much better observing conditions, GRB021004 was detected
again at the Bronberg observatory. The GRB has faded over one magnitude CR
since the previous observation, about 24 hours earlier.

An image was composed by stacking 10 individual images, taken around the
time
20021005.824 UT.
The limiting magnitude of this image is well beyound 20.0 CR, based on the
USNO-A2.0 R magnitudes.

Astrometry on the new (better quality) image with reference to the USNO-A2.0
frame (as was also the case with the initial image) showed the GRB
counterpart at position (2000)
00 26 54.727  +18 55 44.13

The following are details of the follow up observation at the Bronberg
observatory

Bronberg observatory / CBA Pretoria
observer: Berto Monard  MLF, Pretoria, South Africa
location: -25 º 54' 48", 28º 26' 44"E, altitude 1590m
instrumentation: LX200 12" f/4.2 with ST-7E, unfiltered
conditions: good wind

The reported CR magnitude results from differential photometry to many
comparison stars with R magnitudes from USNO-A2.0.

GRB021004   20021005.824 UT   189CR   (decimal point omitted)

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp