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GCN Circular 28359

Subject
GRB 200829A: optical observations, a light curve in R-filter
Date
2020-09-03T15:15:47Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), N. Pankov (HSE), S. Belkin (IKI), A. Volnova (IKI), 
I. Reva (FAPHI), A. Zhornichenko (KIAM), A. Novichonok (Petrozavodsk 
State University, KIAM), S. Naroenkov (INASAN), K.  Antoniuk (CrAO), 
R.Ya. Inasaridze (AbAO), E. Mazaeva (IKI), Sh. Ehgamberdiev (UBAI) 
report on behalf of larger GRB IKI FuN collaboration:

We observed the the field of GRB 200829A (Siegel et al., GCN 28307; Ursi
et al., GCN 28314; Ridnaia et al., GCN 28323; Lesage & Meegan, GCN
28326)  with Zeiss-1000 telescope of TShAO observatory, RC-36 telescope 
of Kitab observatory, Zeiss-1000 telescope of Koshka Observatory, AZT-11 
telescope of CrAO observatory, and AS-23 telescope of AbAO observatory. 
The optical afterglow (Siegel et al., GCN 28307, Pozanenko et al., GCN 
28308; Kuin & Siegel, GCN 28311; Lipunov et al., GCN 28315; Vinko et 
al., GCN 28316; Hentunen et al., GCN 28318; Moskvitin et al., GCNs 
28322, 28328, Zhu et al., GCNs 28324,  28330; Pankov et al., GCN 28329; 
Izzo, GCN 28331; Volnova et al., GCN  28333)  is detected on first two 
days   after GRB trigger. Preliminary light curve of the afterglow in 
R-filter can be found at

http://grb.rssi.ru/GRB200829A/GRB200829A_LC1_R.png

One can tentatively assume a jet break in the light curve at ~0.33 days.

(The photometry is based on nearby USNO-B1.0 stars identical for all 
observations.)
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