GCN Circular 36029

Tian-Rui Sun, Jin-Jun Geng, Min-Xuan Cai, Zheng-Yan Liu, Ye Li, Xue-Feng Wu report on behalf of the WFST Collaboration:

Following the detection of LXT 240402A by Leia (Xu et al. GCN 36016
Not found
 
 
, Jia et al. GCN 36022
Not found
 
 
) and FXT on board Einstein Probe (Jia et al. GCN 36022
Not found
 
 
) ,VLT (Levan et al. GCN 36025
Not found
 
 
) , we carried out image observations using the newly deployed Wide Field Survey Telescope (WFST Collaboration; arXiv:2306.07590
Not found
 
 
) at Lenghu Astronomical Observation Base (Qinghai province, China) to search and follow up its afterglow in the error box.

We observed the target position with a total exposure of 1200s in g-band starting from 2024-04-03T19:28:35.
No new optical source was detected within the error box (Jia et al. GCN 36022
Not found
 
 
) down to 23.8 mag in the coadded image.

Our non-detection is consistent with the results from the GWAC-F50A (Xin et al., GCN 36018
Not found
 
 
), MASTER (Lipunov et al. GCN 36019
Not found
 
 
), Kinder (Yang et al. GCN 36027
Not found
 
 
) limits. 
As Yang noticed in GCN 36027
Not found
 
 
, upon visual inspection, we also found that the star (SDSS J162148.18+254546.5)  appears to have a broader profile. 

We used the PanStarrs DR1 (Flewelling,2020) catalog as the magnitude reference for calibration.