TITLE:   GCN CIRCULAR
NUMBER:  46276
SUBJECT: G261113_D02737:  SVOM/GWAC discovers an optical fading source which might be associated to Fermi/GBM trigger 816291960
DATE:    26/11/14 17:25:32 GMT
FROM:    Liping Xin at NAOC, SVOM <xlp@nao.cas.cn>

L. P. Xin, J. Y. Wei, Y. Xu, H. L. Li, J. R. Xu, X. H. Han, J. Wang, L. Huang, Y. L. Qiu, L.J. Wang, H. B. Cai, C. Wu, W. J. Xie, L. J. Chen, Y. T. Zheng, W. L. Dong, P. P. Zhang, Y. J. Xiao, Y. N. Ma, S.,Jin, Z. R. Cui,J. S. Deng (NAOC), Z. G. Dai (USTC), X. Y. Wang (NJU), E. W. Liang, X. G. Wang (GXU) report on behalf of SVOM/GWAC team.

SVOM/GWAC detected an uncatalogued fading source G261113_D02737 at 2026-11-13T19:45:45 UTC. The source initially rose and then faded, reaching a peak magnitude of W~13.8 mag. 

Automatically follow-up observations by GWAC-F60 showed that it was fading continuously with the decay slope of -0.94 with a single power law, down to the R~18.5 mag at 3 ks after the GWAC discovery time. 

The position is RA(deg): 164.7397862, DEC(deg): 43.9302714, J2000, or 
RA(J2000): 10:58:57.54
DEC(J2000):+43:55:48.98
with an uncertainties of 0.5 arcseconds. 

There is no any cataloged source at this position in the Legacy suvery. 

The data are still under analysis, and any updates may be reported in a future circular. 

In the course of our analysis, we noticed the potential coincidence of this source with Fermi/GBM trigger 816291960, based on its location (RA = 161.5833, Dec = 46.05) and trigger time (2026-11-13T19:45:55.100 UTC).

More follow-ups are encouraged for this source.