TITLE:   GCN CIRCULAR
NUMBER:  28318
SUBJECT: GRB 200829A: THO optical observatios
DATE:    20/08/30 06:36:53 GMT
FROM:    Veli-Pekka Hentunen at Taurus Hill Obs,A95  <veli-pekka.hentunen@kassiopeia.net>

Veli-Pekka Hentunen and Markku Nissinen (Taurus Hill

Observatory, Varkaus, Finland) report:

 

We have detected GRB 200829A optical afterglow at Taurus 

Hill Observatory (A95) using C-14SC 0.35-m f/7.3 telescope,

SBIG STT-8300M CCD and RGB filters. The observations were 

started at 2020-08-29 18:48:29 (UT). 

 

The afterglow was detected at the position RA 16 44 49.16 

and DEC +72 19 45.9.

 

The following magnitudes were obtained from the observations 

using NOMAD1 1623-0124683 (R=17.05, V=17.32, B=17.55)

as a comparison star:

 

Tmid(h:min:sec)+T0   Filter      Exp.time(sec) Mag        MagErr


4:53:37            R          3x180        17.98          0.28


5:02:49            R          3x180        18.11          0.34

5:12:36            R          3x180        18.22          0.27

5:25:05            R          5x180        18.26          0.17

6:00:06            R          5x180        18.27          0.14

6:25:44            B          3x180        18.66          0.21

6:35:32            G         3x180        18.69          0.26

 

URL link for the RGB image:

www.kassiopeia.net/wp-content/uploads/2020/08/GRB200829A_RGB_web.png