[AAVSO-HEN] GRB 041006 Optical afterglow observations

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2795
SUBJECT: GRB 041006 Optical afterglow observations
DATE:    04/10/10 05:19:27 GMT
FROM:    Shashi Bhushan Pandey at State Obs.Nainital,India  <shashi at upso.ernet.in>

Kuntal Misra and S. B. Pandey (ARIES NainiTal), on behalf of
larger Indian GRB collaboration

We observed several R_c band frames of the GRB 041006 optical afterglow,
determined the magnitudes in comparison with the stars A and B as reported
in GCN 2792 using 1.04-m telescope of ARIES Nainital India. The OT decayed
by ~ 0.5 mag from Oct 6.75 to Oct 6.91 UT.

Preliminary R_c magnitudes are:

Oct 6.776284   19.81  0.05
Oct 6.830509   20.00  0.05
Oct 6.862395   20.02  0.05
Oct 6.877175   20.18  0.06

The temporal flux decay index is ~ -1.0. We did not notice any 
considerable
steepening in the light curve using our data set.

This massage may be cited.





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SHASHI BHUSHAN PANDEY    e-mail:shashi at upso.ernet.in,  
(SRF)                          :shashi at rri.res.in
ARIES                          :sbpupso2000 at yahoo.com 
MANORA PEAK, NAINITAL    Phone : (91-05942)235136,235583
UTTARANCHAL, 263129      Fax   : (91-05942)235136,235053 
INDIA.                   Gram  : Astronomy
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