havaintotornit-l@ursa.fi
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Jottei havaintokohteet loppuisi, niin Kaksosista on juuri löydetty kirkas (13.6m) gammapurkauksen jälkihehku, joka saattaisi olla havaittavissa illalla Suomestakin. Koordinaati ja etsintäkartta löytyvät alta.
arto
--
arto.oksanen_at_jklsirius.fi
-----Original Message-----
From: GCN Circulars [mailto:gcncirc_at_capella.gsfc.nasa.gov]
Sent: 20. lokakuuta 2007 10:18
To: Oksanen Arto
Subject: GRB 071020A: ROTSE-III Detection of Optical Counterpart
TITLE: GCN CIRCULAR
NUMBER: 6948
SUBJECT: GRB 071020A: ROTSE-III Detection of Optical Counterpart
DATE: 07/10/20 07:17:21 GMT
FROM: Brad Schaefer at LSU <schaefer_at_grb.phys.lsu.edu>
B. E. Schaefer (Louisiana State), T.A. McKay (U Mich), F. Yuan (U Mich),
report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
071020A (Swift trigger 294835). The first image was at 07:02:52.5 UT, 25.6
s after the burst (9.5 s after the GCN notice time). The unfiltered images
are calibrated relative to USNO A2.0. We detect a 13.6 magnitude, fading
source with coordinates:
07:58:39.9 +32:51:41.4 (J2000), with positional uncertainty
of 1" or better
start UT mag mlim(of image)
07:02:52.9 13.6 16.4
This source is not visible in DSS (second epoch), 2MASS or the MPChecker
database.
A jpeg image is available at
http://www.rotse.net/images/gsb294835_3b00_img.jpg
Continuing observations are in progress.
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