TITLE:   GCN CIRCULAR
NUMBER:  35620
SUBJECT: GRB 240123A: Mondy continued optical observations and the PL decay index
DATE:    24/01/24 15:44:05 GMT
FROM:    Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>

N. Pankov (HSE, IKI),  A. Pozanenko (IKI), E. Klunko (ISTP), S. Belkin (IKI) report on behalf of GRB IKI FuN:

We continued to observe the afterglow of GRB 240123A (D'Ai et al., GCN 35602; Pankov et al., GCN 35605, GCN 35609; Sasada et al., GCN 35618; Moskvitin at al., GCN 35619) with AZT-33IK telescope of Mondy observatory  in  R-filter.   

Using previously reported photometry  (Pankov et al., GCN 35605, GCN 35609; Moskvitin at al., GCN 35619) and photometry  obtained  on t-T0 0.400722 we approximate the light curve with a PL model with the index of PL alpha = -1.1, see Figure at 
http://grb.rssi.ru/GRB240123A/GRB240123A_LC_approximation.jpg